# -*- coding: utf-8 -*-

"""
 (c) 2014-2016 - Copyright Red Hat Inc

 Authors:
   Pierre-Yves Chibon <pingou@pingoured.fr>

"""

# pylint: disable=no-member
# pylint: disable=too-many-lines
# pylint: disable=too-many-branches
# pylint: disable=too-many-locals
# pylint: disable=too-many-statements


import flask
import os
from collections import defaultdict
from math import ceil

import pygit2
import werkzeug.datastructures
from sqlalchemy.exc import SQLAlchemyError

import chardet
import kitchen.text.converters as ktc
import mimetypes

import pagure.doc_utils
import pagure.exceptions
import pagure.lib
import pagure.forms
from pagure import (APP, SESSION, LOG, __get_file_in_tree,
                    login_required, authenticated)


# URLs

@APP.route(
    '/<repo>/issue/<int:issueid>/update/',
    methods=['GET', 'POST'])
@APP.route(
    '/<repo>/issue/<int:issueid>/update',
    methods=['GET', 'POST'])
@APP.route(
    '/<namespace>/<repo>/issue/<int:issueid>/update/',
    methods=['GET', 'POST'])
@APP.route(
    '/<namespace>/<repo>/issue/<int:issueid>/update',
    methods=['GET', 'POST'])
@APP.route(
    '/fork/<username>/<repo>/issue/<int:issueid>/update/',
    methods=['GET', 'POST'])
@APP.route(
    '/fork/<username>/<repo>/issue/<int:issueid>/update',
    methods=['GET', 'POST'])
@APP.route(
    '/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/update/',
    methods=['GET', 'POST'])
@APP.route(
    '/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/update',
    methods=['GET', 'POST'])
@login_required
def update_issue(repo, issueid, username=None, namespace=None):
    ''' Add a comment to an issue. '''
    is_js = flask.request.args.get('js', False)

    repo = flask.g.repo

    if flask.request.method == 'GET':
        if not is_js:
            flask.flash('Invalid method: GET', 'error')
        return flask.redirect(flask.url_for(
            'view_issue', username=username, repo=repo.name,
            namespace=repo.namespace, issueid=issueid))

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    issue = pagure.lib.search_issues(SESSION, repo, issueid=issueid)

    if issue is None or issue.project != repo:
        flask.abort(404, 'Issue not found')

    if issue.private and not flask.g.repo_admin \
            and (not authenticated() or
                 not issue.user.user == flask.g.fas_user.username):
        flask.abort(
            403, 'This issue is private and you are not allowed to view it')

    if flask.request.form.get('edit_comment'):
        commentid = flask.request.form.get('edit_comment')
        form = pagure.forms.EditCommentForm()
        if form.validate_on_submit():
            return edit_comment_issue(
                repo.name, issueid, commentid, username=username)

    status = pagure.lib.get_issue_statuses(SESSION)
    form = pagure.forms.UpdateIssueForm(
        status=status,
        priorities=repo.priorities,
        milestones=repo.milestones,
        close_status=repo.close_status,
    )

    if form.validate_on_submit():
        repo_admin = flask.g.repo_admin

        if flask.request.form.get('drop_comment'):
            commentid = flask.request.form.get('drop_comment')

            comment = pagure.lib.get_issue_comment(
                SESSION, issue.uid, commentid)
            if comment is None or comment.issue.project != repo:
                flask.abort(404, 'Comment not found')

            if (flask.g.fas_user.username != comment.user.username
                    or comment.parent.status != 'Open') \
                    and not flask.g.repo_admin:
                flask.abort(
                    403,
                    'You are not allowed to remove this comment from '
                    'this issue')

            SESSION.delete(comment)
            try:
                SESSION.commit()
                if not is_js:
                    flask.flash('Comment removed')
            except SQLAlchemyError as err:  # pragma: no cover
                is_js = False
                SESSION.rollback()
                LOG.error(err)
                if not is_js:
                    flask.flash(
                        'Could not remove the comment: %s' % commentid,
                        'error')
            if is_js:
                return 'ok'
            else:
                return flask.redirect(flask.url_for(
                    'view_issue', username=username, repo=repo.name,
                    namespace=repo.namespace, issueid=issueid))

        comment = form.comment.data
        depends = []
        for depend in form.depends.data.split(','):
            if depend.strip():
                try:
                    depends.append(int(depend.strip()))
                except ValueError:
                    pass

        blocks = []
        for block in form.blocks.data.split(','):
            if block.strip():
                try:
                    blocks.append(int(block.strip()))
                except ValueError:
                    pass

        assignee = form.assignee.data.strip() or None
        new_status = form.status.data.strip() or None
        close_status = form.close_status.data or None
        if new_status != 'Closed':
            close_status = None
        if close_status not in repo.close_status:
            close_status = None

        new_priority = None
        try:
            new_priority = int(form.priority.data)
        except:
            pass
        tags = [
            tag.strip()
            for tag in form.tag.data.split(',')
            if tag.strip()]

        new_milestone = None
        try:
            if repo.milestones:
                new_milestone = form.milestone.data.strip() or None
        except:
            pass

        try:
            messages = set()

            # New comment
            if comment:
                message = pagure.lib.add_issue_comment(
                    SESSION,
                    issue=issue,
                    comment=comment,
                    user=flask.g.fas_user.username,
                    ticketfolder=APP.config['TICKETS_FOLDER'],
                )
                SESSION.commit()
                if message and not is_js:
                    messages.add(message)

            if repo_admin:
                # Adjust (add/remove) tags
                messages.union(set(pagure.lib.update_tags(
                    SESSION, issue, tags,
                    username=flask.g.fas_user.username,
                    ticketfolder=APP.config['TICKETS_FOLDER']
                )))

            # The meta-data can only be changed by admins, which means they
            # will be missing for non-admin and thus reset if we let them
            if repo_admin:
                # Assign or update assignee of the ticket
                message = pagure.lib.add_issue_assignee(
                    SESSION,
                    issue=issue,
                    assignee=assignee or None,
                    user=flask.g.fas_user.username,
                    ticketfolder=APP.config['TICKETS_FOLDER'],
                )
                SESSION.commit()
                if message:
                    messages.add(message)

                # Update status
                if new_status in status:
                    message = pagure.lib.edit_issue(
                        SESSION,
                        issue=issue,
                        status=new_status,
                        close_status=close_status,
                        private=issue.private,
                        user=flask.g.fas_user.username,
                        ticketfolder=APP.config['TICKETS_FOLDER'],
                    )
                    SESSION.commit()
                    if message:
                        messages.add(message)

                # Update priority
                if str(new_priority) in repo.priorities:
                    message = pagure.lib.edit_issue(
                        SESSION,
                        issue=issue,
                        priority=new_priority,
                        private=issue.private,
                        user=flask.g.fas_user.username,
                        ticketfolder=APP.config['TICKETS_FOLDER'],
                    )
                    SESSION.commit()
                    if message:
                        messages.add(message)

                # Update milestone and privacy setting
                message = pagure.lib.edit_issue(
                    SESSION,
                    issue=issue,
                    milestone=new_milestone,
                    private=form.private.data,
                    user=flask.g.fas_user.username,
                    ticketfolder=APP.config['TICKETS_FOLDER'],
                )
                SESSION.commit()
                if message:
                    messages.add(message)

            # Update ticket this one depends on
            messages.union(set(pagure.lib.update_dependency_issue(
                SESSION, repo, issue, depends,
                username=flask.g.fas_user.username,
                ticketfolder=APP.config['TICKETS_FOLDER'],
            )))

            # Update ticket(s) depending on this one
            messages.union(set(pagure.lib.update_blocked_issue(
                SESSION, repo, issue, blocks,
                username=flask.g.fas_user.username,
                ticketfolder=APP.config['TICKETS_FOLDER'],
            )))

            if not is_js:
                for message in messages:
                    flask.flash(message)

        except pagure.exceptions.PagureException as err:
            is_js = False
            SESSION.rollback()
            if not is_js:
                flask.flash(err.message, 'error')
        except SQLAlchemyError as err:  # pragma: no cover
            is_js = False
            SESSION.rollback()
            APP.logger.exception(err)
            if not is_js:
                flask.flash(str(err), 'error')

    if is_js:
        return 'ok'
    else:
        return flask.redirect(flask.url_for(
            'view_issue', username=username, repo=repo.name, issueid=issueid))


@APP.route('/<repo>/tag/<tag>/edit/', methods=('GET', 'POST'))
@APP.route('/<repo>/tag/<tag>/edit', methods=('GET', 'POST'))
@APP.route('/<namespace>/<repo>/tag/<tag>/edit/', methods=('GET', 'POST'))
@APP.route('/<namespace>/<repo>/tag/<tag>/edit', methods=('GET', 'POST'))
@APP.route(
    '/fork/<username>/<repo>/tag/<tag>/edit/',
    methods=('GET', 'POST'))
@APP.route(
    '/fork/<username>/<repo>/tag/<tag>/edit',
    methods=('GET', 'POST'))
@APP.route(
    '/fork/<username>/<namespace>/<repo>/tag/<tag>/edit/',
    methods=('GET', 'POST'))
@APP.route(
    '/fork/<username>/<namespace>/<repo>/tag/<tag>/edit',
    methods=('GET', 'POST'))
@login_required
def edit_tag(repo, tag, username=None, namespace=None):
    """ Edit the specified tag associated with the issues of a project.
    """
    repo = flask.g.repo

    if not flask.g.repo_admin:
        flask.abort(
            403,
            'You are not allowed to edit tags associated with the issues of \
            this project')

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    tags = pagure.lib.get_tags_of_project(SESSION, repo)

    if not tags or tag not in [t.tag for t in tags]:
        flask.abort(404, 'Tag %s not found in this project' % tag)

    form = pagure.forms.AddIssueTagForm()
    if form.validate_on_submit():
        new_tag = form.tag.data

        msgs = pagure.lib.edit_issue_tags(
            SESSION, repo, tag, new_tag,
            user=flask.g.fas_user.username,
            ticketfolder=APP.config['TICKETS_FOLDER']
        )

        try:
            SESSION.commit()
            for msg in msgs:
                flask.flash(msg)
        except SQLAlchemyError as err:  # pragma: no cover
            SESSION.rollback()
            LOG.error(err)
            flask.flash('Could not edit tag: %s' % tag, 'error')

        return flask.redirect(flask.url_for(
            '.view_settings', repo=repo.name, username=username,
            namespace=repo.namespace))

    return flask.render_template(
        'edit_tag.html',
        form=form,
        username=username,
        repo=repo,
        edit_tag=tag,
    )


@APP.route('/<repo>/droptag/', methods=['POST'])
@APP.route('/<namespace>/<repo>/droptag/', methods=['POST'])
@APP.route('/fork/<username>/<repo>/droptag/', methods=['POST'])
@APP.route('/fork/<username>/<namespace>/<repo>/droptag/', methods=['POST'])
@login_required
def remove_tag(repo, username=None, namespace=None):
    """ Remove the specified tag, associated with the issues, from the project.
    """
    repo = flask.g.repo

    if not flask.g.repo_admin:
        flask.abort(
            403,
            'You are not allowed to remove tags associated with the issues \
            of this project')

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    form = pagure.forms.AddIssueTagForm()
    if form.validate_on_submit():
        tags = form.tag.data
        tags = [tag.strip() for tag in tags.split(',')]

        msgs = pagure.lib.remove_tags(
            SESSION, repo, tags,
            user=flask.g.fas_user.username,
            ticketfolder=APP.config['TICKETS_FOLDER']
        )

        try:
            SESSION.commit()
            for msg in msgs:
                flask.flash(msg)
        except SQLAlchemyError as err:  # pragma: no cover
            SESSION.rollback()
            LOG.error(err)
            flask.flash(
                'Could not remove tag: %s' % ','.join(tags), 'error')

    return flask.redirect(flask.url_for(
        '.view_settings', repo=repo.name, username=username,
        namespace=repo.namespace)
    )


@APP.route('/<repo>/issues/')
@APP.route('/<repo>/issues')
@APP.route('/<namespace>/<repo>/issues/')
@APP.route('/<namespace>/<repo>/issues')
@APP.route('/fork/<username>/<repo>/issues/')
@APP.route('/fork/<username>/<repo>/issues')
@APP.route('/fork/<username>/<namespace>/<repo>/issues/')
@APP.route('/fork/<username>/<namespace>/<repo>/issues')
def view_issues(repo, username=None, namespace=None):
    """ List all issues associated to a repo
    """
    status = flask.request.args.get('status', 'Open')
    priority = flask.request.args.get('priority', None)
    tags = flask.request.args.getlist('tags')
    tags = [tag.strip() for tag in tags if tag.strip()]
    assignee = flask.request.args.get('assignee', None)
    author = flask.request.args.get('author', None)

    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    try:
        priority = int(priority)
    except:
        priority = None

    # Hide private tickets
    private = False
    # If user is authenticated, show him/her his/her private tickets
    if authenticated():
        private = flask.g.fas_user.username
    # If user is repo admin, show all tickets included the private ones
    if flask.g.repo_admin:
        private = None

    if str(status).lower() in ['all']:
        status = None

    oth_issues = None
    if status is not None:
        issues = pagure.lib.search_issues(
            SESSION,
            repo,
            closed=True if status.lower() == 'closed' else False,
            status=status.capitalize() if status.lower() != 'closed' else None,
            tags=tags,
            assignee=assignee,
            author=author,
            private=private,
            priority=priority,
            offset=flask.g.offset,
            limit=flask.g.limit,
        )
        issues_cnt = pagure.lib.search_issues(
            SESSION,
            repo,
            closed=True if status.lower() == 'closed' else False,
            status=status.capitalize() if status.lower() != 'closed' else None,
            tags=tags,
            assignee=assignee,
            author=author,
            private=private,
            priority=priority,
            count=True
        )
        oth_issues = pagure.lib.search_issues(
            SESSION,
            repo,
            closed=False if status.lower() == 'closed' else True,
            tags=tags,
            assignee=assignee,
            author=author,
            private=private,
            priority=priority,
            count=True,
        )
    else:
        issues = pagure.lib.search_issues(
            SESSION, repo, tags=tags, assignee=assignee,
            author=author, private=private, priority=priority,
            offset=flask.g.offset, limit=flask.g.limit,
        )
        issues_cnt = pagure.lib.search_issues(
            SESSION, repo, tags=tags, assignee=assignee,
            author=author, private=private, priority=priority, count=True)

    tag_list = pagure.lib.get_tags_of_project(SESSION, repo)

    reponame = pagure.get_repo_path(repo)
    repo_obj = pygit2.Repository(reponame)

    total_page = int(ceil(issues_cnt / float(flask.g.limit)))

    return flask.render_template(
        'issues.html',
        select='issues',
        repo=repo,
        username=username,
        tag_list=tag_list,
        status=status,
        issues=issues,
        issues_cnt=issues_cnt,
        oth_issues=oth_issues,
        tags=tags,
        assignee=assignee,
        author=author,
        priority=priority,
        total_page=total_page,
        add_report_form=pagure.forms.AddReportForm(),
    )


@APP.route('/<repo>/roadmap/')
@APP.route('/<repo>/roadmap')
@APP.route('/<namespace>/<repo>/roadmap/')
@APP.route('/<namespace>/<repo>/roadmap')
@APP.route('/fork/<username>/<repo>/roadmap/')
@APP.route('/fork/<username>/<repo>/roadmap')
@APP.route('/fork/<username>/<namespace>/<repo>/roadmap/')
@APP.route('/fork/<username>/<namespace>/<repo>/roadmap')
def view_roadmap(repo, username=None, namespace=None):
    """ List all issues associated to a repo as roadmap
    """
    status = flask.request.args.get('status', 'Open')
    if status.lower() == 'all':
        status = None
    milestone = flask.request.args.getlist('milestone', None)

    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    # Hide private tickets
    private = False
    # If user is authenticated, show him/her his/her private tickets
    if authenticated():
        private = flask.g.fas_user.username
    # If user is repo admin, show all tickets included the private ones
    if flask.g.repo_admin:
        private = None

    milestones = milestone or list(repo.milestones.keys())

    issues = pagure.lib.search_issues(
        SESSION,
        repo,
        milestones=milestones,
        private=private,
    )

    # Change from a list of issues to a dict of milestone/issues
    milestone_issues = defaultdict(list)
    for cnt in range(len(issues)):
        saved = False
        for mlstone in sorted(milestones):
            if mlstone == issues[cnt].milestone:
                milestone_issues[mlstone].append(issues[cnt])
                saved = True
                break
        if saved:
            continue

    if status:
        for key in milestone_issues.keys():
            active = False
            for issue in milestone_issues[key]:
                if issue.status == 'Open':
                    active = True
                    break
            if not active:
                del milestone_issues[key]

    if milestone:
        for mlstone in milestone:
            if mlstone not in milestone_issues:
                milestone_issues[mlstone] = []

    tag_list = pagure.lib.get_tags_of_project(SESSION, repo)

    reponame = pagure.get_repo_path(repo)
    repo_obj = pygit2.Repository(reponame)
    milestones_ordered = sorted(list(milestone_issues.keys()))
    if 'unplanned' in milestones_ordered:
        index = milestones_ordered.index('unplanned')
        cnt = len(milestones_ordered)
        milestones_ordered.insert(cnt, milestones_ordered.pop(index))

    return flask.render_template(
        'roadmap.html',
        select='issues',
        repo=repo,
        username=username,
        tag_list=tag_list,
        status=status,
        milestones=milestones_ordered,
        issues=milestone_issues,
        tags=milestone,
    )


@APP.route('/<repo>/new_issue/', methods=('GET', 'POST'))
@APP.route('/<repo>/new_issue', methods=('GET', 'POST'))
@APP.route('/<namespace>/<repo>/new_issue/', methods=('GET', 'POST'))
@APP.route('/<namespace>/<repo>/new_issue', methods=('GET', 'POST'))
@APP.route('/fork/<username>/<repo>/new_issue/', methods=('GET', 'POST'))
@APP.route('/fork/<username>/<repo>/new_issue', methods=('GET', 'POST'))
@APP.route(
    '/fork/<username>/<namespace>/<repo>/new_issue/',
    methods=('GET', 'POST'))
@APP.route(
    '/fork/<username>/<namespace>/<repo>/new_issue',
    methods=('GET', 'POST'))
@login_required
def new_issue(repo, username=None, namespace=None):
    """ Create a new issue
    """
    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    form = pagure.forms.IssueFormSimplied()
    if form.validate_on_submit():
        title = form.title.data
        content = form.issue_content.data
        private = form.private.data

        try:
            user_obj = pagure.lib.get_user(
                SESSION, flask.g.fas_user.username)
        except pagure.exceptions.PagureException:
            flask.abort(
                404,
                'No such user found in the database: %s' % (
                    flask.g.fas_user.username))

        try:
            issue = pagure.lib.new_issue(
                SESSION,
                repo=repo,
                title=title,
                content=content,
                private=private or False,
                user=flask.g.fas_user.username,
                ticketfolder=APP.config['TICKETS_FOLDER'],
            )
            SESSION.commit()
            # If there is a file attached, attach it.
            filestream = flask.request.files.get('filestream')
            if filestream and '<!!image>' in issue.content:
                new_filename = pagure.lib.git.add_file_to_git(
                    repo=repo,
                    issue=issue,
                    ticketfolder=APP.config['TICKETS_FOLDER'],
                    user=user_obj,
                    filename=filestream.filename,
                    filestream=filestream.stream,
                )
                # Replace the <!!image> tag in the comment with the link
                # to the actual image
                filelocation = flask.url_for(
                    'view_issue_raw_file',
                    repo=repo.name,
                    username=username,
                    filename=new_filename,
                )
                new_filename = new_filename.split('-', 1)[1]
                url = '[![%s](%s)](%s)' % (
                    new_filename, filelocation, filelocation)
                issue.content = issue.content.replace('<!!image>', url)
                SESSION.add(issue)
                SESSION.commit()

            return flask.redirect(flask.url_for(
                '.view_issue', username=username, repo=repo.name,
                namespace=namespace, issueid=issue.id))
        except pagure.exceptions.PagureException as err:
            flask.flash(str(err), 'error')
        except SQLAlchemyError as err:  # pragma: no cover
            SESSION.rollback()
            flask.flash(str(err), 'error')

    types = None
    default = None
    ticketrepopath = os.path.join(APP.config['TICKETS_FOLDER'], repo.path)
    if os.path.exists(ticketrepopath):
        ticketrepo = pygit2.Repository(ticketrepopath)
        if not ticketrepo.is_empty and not ticketrepo.head_is_unborn:
            commit = ticketrepo[ticketrepo.head.target]
            # Get the different ticket types
            files = __get_file_in_tree(
                ticketrepo, commit.tree, ['templates'],
                bail_on_tree=True)
            if files:
                types = [f.name.rstrip('.md') for f in files]
            # Get the default template
            default_file = __get_file_in_tree(
                ticketrepo, commit.tree, ['templates', 'default.md'],
                bail_on_tree=True)
            if default_file:
                default, _ = pagure.doc_utils.convert_readme(
                    default_file.data, 'md')

    if flask.request.method == 'GET':
        form.private.data = repo.settings.get(
            'issues_default_to_private', False)

    return flask.render_template(
        'new_issue.html',
        select='issues',
        form=form,
        repo=repo,
        username=username,
        types=types,
        default=default,
    )


@APP.route('/<repo>/issue/<int:issueid>/')
@APP.route('/<repo>/issue/<int:issueid>')
@APP.route('/<namespace>/<repo>/issue/<int:issueid>/')
@APP.route('/<namespace>/<repo>/issue/<int:issueid>')
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>/')
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>')
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/')
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>')
def view_issue(repo, issueid, username=None, namespace=None):
    """ List all issues associated to a repo
    """

    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    issue = pagure.lib.search_issues(SESSION, repo, issueid=issueid)

    if issue is None or issue.project != repo:
        flask.abort(404, 'Issue not found')

    if issue.private and not flask.g.repo_admin \
            and (not authenticated() or
                 not issue.user.user == flask.g.fas_user.username):
        flask.abort(
            403, 'This issue is private and you are not allowed to view it')

    reponame = pagure.get_repo_path(repo)
    repo_obj = pygit2.Repository(reponame)

    status = pagure.lib.get_issue_statuses(SESSION)

    form = pagure.forms.UpdateIssueForm(
        status=status,
        priorities=repo.priorities,
        milestones=repo.milestones,
        close_status=repo.close_status,
    )
    form.status.data = issue.status
    form.priority.data = str(issue.priority)
    form.milestone.data = str(issue.milestone)
    form.private.data = issue.private
    form.close_status.data = issue.close_status
    tag_list = pagure.lib.get_tags_of_project(SESSION, repo)
    return flask.render_template(
        'issue.html',
        select='issues',
        repo=repo,
        username=username,
        tag_list=tag_list,
        issue=issue,
        issueid=issueid,
        form=form,
    )


@APP.route('/<repo>/issue/<int:issueid>/drop', methods=['POST'])
@APP.route('/<namespace>/<repo>/issue/<int:issueid>/drop', methods=['POST'])
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>/drop',
           methods=['POST'])
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/drop',
           methods=['POST'])
def delete_issue(repo, issueid, username=None, namespace=None):
    """ Delete the specified issue
    """

    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    issue = pagure.lib.search_issues(SESSION, repo, issueid=issueid)

    if issue is None or issue.project != repo:
        flask.abort(404, 'Issue not found')

    if not flask.g.repo_admin:
        flask.abort(
            403,
            'You are not allowed to remove tickets of this project')

    form = pagure.forms.ConfirmationForm()
    if form.validate_on_submit():
        try:
            pagure.lib.drop_issue(
                SESSION, issue,
                user=flask.g.fas_user.username,
                ticketfolder=APP.config['TICKETS_FOLDER'],
            )
            SESSION.commit()
            flask.flash('Issue deleted')
            return flask.redirect(flask.url_for(
                'view_issues', username=username, repo=repo.name,
                namespace=namespace))
        except SQLAlchemyError as err:  # pragma: no cover
            SESSION.rollback()
            APP.logger.exception(err)
            flask.flash('Could not delete the issue', 'error')

    return flask.redirect(flask.url_for(
        'view_issue', username=username, repo=repo.name,
        namespace=repo.namespace, issueid=issueid))


@APP.route('/<repo>/issue/<int:issueid>/edit/', methods=('GET', 'POST'))
@APP.route('/<repo>/issue/<int:issueid>/edit', methods=('GET', 'POST'))
@APP.route(
    '/<namespace>/<repo>/issue/<int:issueid>/edit/',
    methods=('GET', 'POST'))
@APP.route(
    '/<namespace>/<repo>/issue/<int:issueid>/edit',
    methods=('GET', 'POST'))
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>/edit/',
           methods=('GET', 'POST'))
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>/edit',
           methods=('GET', 'POST'))
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/edit/',
           methods=('GET', 'POST'))
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/edit',
           methods=('GET', 'POST'))
@login_required
def edit_issue(repo, issueid, username=None, namespace=None):
    """ Edit the specified issue
    """
    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    issue = pagure.lib.search_issues(SESSION, repo, issueid=issueid)

    if issue is None or issue.project != repo:
        flask.abort(404, 'Issue not found')

    if not (flask.g.repo_admin
            or flask.g.fas_user.username == issue.user.username):
        flask.abort(
            403, 'You are not allowed to edit issues for this project')

    status = pagure.lib.get_issue_statuses(SESSION)
    form = pagure.forms.IssueForm(status=status)
    if form.validate_on_submit():
        title = form.title.data
        content = form.issue_content.data
        status = form.status.data
        private = form.private.data

        try:
            user_obj = pagure.lib.get_user(
                SESSION, flask.g.fas_user.username)
        except pagure.exceptions.PagureException:
            flask.abort(
                404, 'No such user found in the database: %s' % (
                    flask.g.fas_user.username))

        try:
            message = pagure.lib.edit_issue(
                SESSION,
                issue=issue,
                title=title,
                content=content,
                status=status,
                user=flask.g.fas_user.username,
                ticketfolder=APP.config['TICKETS_FOLDER'],
                private=private,
            )
            SESSION.commit()

            # If there is a file attached, attach it.
            filestream = flask.request.files.get('filestream')
            if filestream and '<!!image>' in issue.content:
                new_filename = pagure.lib.git.add_file_to_git(
                    repo=repo,
                    issue=issue,
                    ticketfolder=APP.config['TICKETS_FOLDER'],
                    user=user_obj,
                    filename=filestream.filename,
                    filestream=filestream.stream,
                )
                # Replace the <!!image> tag in the comment with the link
                # to the actual image
                filelocation = flask.url_for(
                    'view_issue_raw_file',
                    repo=repo.name,
                    namespace=repo.namespace,
                    username=username,
                    filename=new_filename,
                )
                new_filename = new_filename.split('-', 1)[1]
                url = '[![%s](%s)](%s)' % (
                    new_filename, filelocation, filelocation)
                issue.content = issue.content.replace('<!!image>', url)
                SESSION.add(issue)
                SESSION.commit()
            flask.flash(message)
            url = flask.url_for(
                'view_issue', username=username, namespace=namespace,
                repo=repo.name, issueid=issueid)
            return flask.redirect(url)
        except pagure.exceptions.PagureException as err:
            flask.flash(str(err), 'error')
        except SQLAlchemyError as err:  # pragma: no cover
            SESSION.rollback()
            flask.flash(str(err), 'error')
    elif flask.request.method == 'GET':
        form.title.data = issue.title
        form.issue_content.data = issue.content
        form.status.data = issue.status
        form.private.data = issue.private

    return flask.render_template(
        'new_issue.html',
        select='issues',
        type='edit',
        form=form,
        repo=repo,
        username=username,
        issue=issue,
        issueid=issueid,
    )


@APP.route('/<namespace>/<repo>/issue/<int:issueid>/upload', methods=['POST'])
@APP.route('/<repo>/issue/<int:issueid>/upload', methods=['POST'])
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>/upload',
           methods=['POST'])
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/upload',
           methods=['POST'])
@login_required
def upload_issue(repo, issueid, username=None, namespace=None):
    ''' Upload a file to a ticket.
    '''
    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    issue = pagure.lib.search_issues(SESSION, repo, issueid=issueid)

    if issue is None or issue.project != repo:
        flask.abort(404, 'Issue not found')

    try:
        user_obj = pagure.lib.get_user(
            SESSION, flask.g.fas_user.username)
    except pagure.exceptions.PagureException:
        flask.abort(
            404, 'No such user found in the database: %s' % (
                flask.g.fas_user.username))

    form = pagure.forms.UploadFileForm()

    if form.validate_on_submit():
        filestream = flask.request.files['filestream']
        new_filename = pagure.lib.git.add_file_to_git(
            repo=repo,
            issue=issue,
            ticketfolder=APP.config['TICKETS_FOLDER'],
            user=user_obj,
            filename=filestream.filename,
            filestream=filestream.stream,
        )
        return flask.jsonify({
            'output': 'ok',
            'filename': new_filename.split('-', 1)[1],
            'filelocation': flask.url_for(
                'view_issue_raw_file',
                repo=repo.name,
                username=username,
                namespace=repo.namespace,
                filename=new_filename,
            )
        })
    else:
        return flask.jsonify({'output': 'notok'})


@APP.route('/<repo>/issue/raw/<path:filename>')
@APP.route('/<namespace>/<repo>/issue/raw/<path:filename>')
@APP.route('/fork/<username>/<repo>/issue/raw/<path:filename>')
@APP.route('/fork/<username>/<namespace>/<repo>/issue/raw/<path:filename>')
def view_issue_raw_file(
        repo, filename=None, username=None, namespace=None):
    """ Displays the raw content of a file of a commit for the specified
    ticket repo.
    """
    repo = flask.g.repo

    if not repo.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    reponame = os.path.join(APP.config['TICKETS_FOLDER'], repo.path)

    repo_obj = pygit2.Repository(reponame)

    if repo_obj.is_empty:
        flask.abort(404, 'Empty repo cannot have a file')

    branch = repo_obj.lookup_branch('master')
    commit = branch.get_object()

    mimetype = None
    encoding = None

    content = __get_file_in_tree(
        repo_obj, commit.tree, filename.split('/'), bail_on_tree=True)
    if not content or isinstance(content, pygit2.Tree):
        flask.abort(404, 'File not found')

    mimetype, encoding = mimetypes.guess_type(filename)
    data = repo_obj[content.oid].data

    if not data:
        flask.abort(404, 'No content found')

    if not mimetype and data[:2] == '#!':
        mimetype = 'text/plain'

    headers = {}
    if not mimetype:
        if '\0' in data:
            mimetype = 'application/octet-stream'
        else:
            mimetype = 'text/plain'
    elif 'html' in mimetype:
        mimetype = 'application/octet-stream'
        headers['Content-Disposition'] = 'attachment'

    if mimetype.startswith('text/') and not encoding:
        encoding = chardet.detect(ktc.to_bytes(data))['encoding']

    headers['Content-Type'] = mimetype
    if encoding:
        headers['Content-Encoding'] = encoding

    return (data, 200, headers)


@APP.route('/<repo>/issue/<int:issueid>/comment/<int:commentid>/edit',
           methods=('GET', 'POST'))
@APP.route('/<namespace>/<repo>/issue/<int:issueid>/comment/<int:commentid>/edit',
           methods=('GET', 'POST'))
@APP.route('/fork/<username>/<repo>/issue/<int:issueid>/comment'
           '/<int:commentid>/edit', methods=('GET', 'POST'))
@APP.route('/fork/<username>/<namespace>/<repo>/issue/<int:issueid>/comment'
           '/<int:commentid>/edit', methods=('GET', 'POST'))
@login_required
def edit_comment_issue(
        repo, issueid, commentid, username=None, namespace=None):
    """Edit comment of an issue
    """
    is_js = flask.request.args.get('js', False)

    project = flask.g.repo

    if not project.settings.get('issue_tracker', True):
        flask.abort(404, 'No issue tracker found for this project')

    issue = pagure.lib.search_issues(SESSION, project, issueid=issueid)

    if issue is None or issue.project != project:
        flask.abort(404, 'Issue not found')

    comment = pagure.lib.get_issue_comment(
        SESSION, issue.uid, commentid)

    if comment is None or comment.parent.project != project:
        flask.abort(404, 'Comment not found')

    if (flask.g.fas_user.username != comment.user.username
            or comment.parent.status != 'Open') \
            and not flask.g.repo_admin:
        flask.abort(403, 'You are not allowed to edit this comment')

    form = pagure.forms.EditCommentForm()

    if form.validate_on_submit():

        updated_comment = form.update_comment.data
        try:
            message = pagure.lib.edit_comment(
                SESSION,
                parent=issue,
                comment=comment,
                user=flask.g.fas_user.username,
                updated_comment=updated_comment,
                folder=APP.config['TICKETS_FOLDER'],
            )
            SESSION.commit()
            if not is_js:
                flask.flash(message)
        except SQLAlchemyError, err:  # pragma: no cover
            SESSION.rollback()
            LOG.error(err)
            if is_js:
                return 'error'
            flask.flash(
                'Could not edit the comment: %s' % commentid, 'error')

        if is_js:
            return 'ok'

        return flask.redirect(flask.url_for(
            'view_issue', username=username, namespace=namespace,
            repo=project.name, issueid=issueid))

    if is_js and flask.request.method == 'POST':
        return 'failed'

    return flask.render_template(
        'comment_update.html',
        select='issues',
        requestid=issueid,
        repo=project,
        username=username,
        form=form,
        comment=comment,
        is_js=is_js,
    )


@APP.route('/<repo>/issues/reports', methods=['POST'])
@APP.route('/<namespace>/<repo>/issues/reports', methods=['POST'])
@APP.route('/fork/<username>/<repo>/issues/reports', methods=['POST'])
@APP.route(
    '/fork/<username>/<namespace>/<repo>/issues/reports', methods=['POST'])
@login_required
def save_reports(repo, username=None, namespace=None):
    """ Marked for watching or Unwatching
    """
    if not flask.g.repo_admin:
        flask.abort(
            403,
            'You are not allowed to create reports for this project')

    return_point = flask.url_for(
        'view_issues', repo=repo, username=username, namespace=namespace)
    if pagure.is_safe_url(flask.request.referrer):
        return_point = flask.request.referrer

    form = pagure.forms.AddReportForm()
    if not form.validate_on_submit():
        flask.abort(400)

    name = form.report_name.data

    try:
        msg = pagure.lib.save_report(
            SESSION,
            flask.g.repo,
            name=name,
            url=flask.request.referrer,
            username=flask.g.fas_user.username)
        SESSION.commit()
        flask.flash(msg)
    except pagure.exceptions.PagureException as msg:
        flask.flash(msg, 'error')

    return flask.redirect(return_point)


@APP.route('/<repo>/report/<report>')
@APP.route('/<namespace>/<repo>/report/<report>')
@APP.route('/fork/<username>/<repo>/report/<report>')
@APP.route('/fork/<username>/<namespace>/<repo>/report/<report>')
@login_required
def view_report(repo, report, username=None, namespace=None):
    """ Show the specified report.
    """
    reports = flask.g.repo.reports
    if report not in reports:
        flask.abort(404, 'No such report found')

    flask.request.args = werkzeug.datastructures.ImmutableMultiDict(
        reports[report])

    return view_issues(repo=repo, username=username, namespace=namespace)