from __future__ import absolute_import, division
import traceback
from difflib import unified_diff
from math import ceil
from peewee import fn, DoesNotExist
from tornado.escape import json_decode
from tornado.web import HTTPError, RequestHandler
from tornado.web import ErrorHandler as BaseErrorHandler
from candolint.models import database, Project, Change, Check
def get_or_404(query, *args, **kwargs):
    try:
        return query.get(*args, **kwargs)
    except DoesNotExist:
        raise HTTPError(404)
def get_project_or_404(domain, user, name):
    pq = Project.select().where(
        Project.domain == domain,
        Project.user == (user if user != '-' else None),
        Project.name == name)
    return get_or_404(pq)
def get_check_or_404(project, check_num):
    cq = (Check
        .select(Check, Change)
        .join(Change)
        .where(Check.project == project)
        .order_by(Check.ordinal.desc()))
    if check_num != 'latest':
        cq = cq.where(Check.ordinal == check_num)
    return get_or_404(cq)
class Paginator(object):
    def __init__(self, query, page, paginate_by=30):
        self.query = query
        self.page = page
        self.paginate_by = paginate_by
        self.pages = int(ceil(query.count() / paginate_by))
    def iterator(self):
        return self.query.paginate(self.page, self.paginate_by).iterator()
class BaseHandler(RequestHandler):
    def prepare(self):
        database.connect()
        super(BaseHandler, self).prepare()
    def on_finish(self):
        if not database.is_closed():
            database.close()
    def paginate(self, query):
        page = self.get_query_argument('page', '1')
        if page and page.isdigit():
            page = max(1, int(page))
        else:
            page = 1
        return Paginator(query, page)
    def write_error(self, status_code, **kwargs):
        data = {
            'code': status_code,
            'message': self._reason,
            'debug_message': ''
        }
        if 'exc_info' in kwargs:
            if self.settings.get('serve_traceback'):
                fexc = traceback.format_exception(*kwargs['exc_info'])
                data['debug_message'] = '\n'.join(fexc)
        if status_code == 404:
            self.render('404.html', **data)
        else:
            self.render('500.html', **data)
class IndexHandler(BaseHandler):
    def get(self):
        latest = (Check
            .select(Check.project_id, fn.MAX(Check.ordinal).alias('maxord'))
            .group_by(Check.project_id)
            .alias('latest'))
        check_ids = (Check
            .select(Check.id)
            .from_(Check, latest)
            .where(Check.project_id == latest.c.project_id)
            .where(Check.ordinal == latest.c.maxord))
        checks = (Check
            .select(Project, Change, *Check.get_light_fields())
            .join(Project)
            .switch(Check)
            .join(Change)
            .where(Check.id.in_(check_ids))
            .order_by(Check.finished.desc(), Check.ordinal.desc()))
        self.render('index.html', checks=checks)
class ProjectHandler(BaseHandler):
    def get(self, domain, user, name):
        project = get_project_or_404(domain, user, name)
        checks = (Check
            .select(Change, *Check.get_light_fields())
            .join(Change)
            .where(Check.project == project)
            .order_by(Check.ordinal.desc()))
        self.render('project.html', project=project, checks=checks)
class AtomHandler(BaseHandler):
    def get(self, domain, user, name):
        project = get_project_or_404(domain, user, name)
        checks = (Check
            .select(Change, *Check.get_light_fields())
            .join(Change)
            .where(Check.project == project)
            .order_by(Check.ordinal.desc()))
        def status(check):
            if not check.success:
                return 'unknown'
            elif check.errors or check.warnings:
                status = []
                if check.errors:
                    msg = self.locale.translate(
                        '{} error', '{} errors', check.errors)
                    status.append(msg.format(check.errors))
                if check.warnings:
                    msg = self.locale.translate(
                        '{} warning', '{} warnings', check.warnings)
                    status.append(msg.format(check.warnings))
                return ', '.join(status)
            else:
                return 'all clean'
        self.set_header('Content-Type', 'application/atom+xml; charset=utf-8')
        self.render('atom.xml', project=project, checks=checks, status=status)
class CheckHandler(BaseHandler):
    def get(self, domain, user, name, check_num, format_='html'):
        project = get_project_or_404(domain, user, name)
        check = get_check_or_404(project, check_num)
        lines = json_decode(check.lines)
        if format_ == 'raw':
            self.get_raw(project, check, lines)
        else:
            self.get_html(project, check, lines)
    def get_raw(self, project, check, lines):
        self.set_header('Content-Type', 'text/plain; charset=utf-8')
        for line in lines:
            self.write(line['text'])
            self.write('\n')
    def get_reference_check(self, check):
        if check.success:
            return (Check
                .select(*Check.get_light_fields())
                .join(Change)
                .where(Check.project == check.project)
                .where(Check.success == True)
                .where(Check.change != check.change)
                .where(Change.branch == check.change.branch)
                .where(Check.ordinal < check.ordinal)
                .order_by(Check.ordinal.desc())
                .first())
        return None
    def get_chart_data(self, check):
        checks = (Check
            .select(*Check.get_light_fields())
            .join(Change)
            .where(Check.project == check.project)
            .where(Change.branch == check.change.branch)
            .order_by(Check.ordinal.desc()))
        more = checks.where(Check.ordinal >= check.ordinal).count()
        limit = 50
        history = list(reversed(checks
            .limit(limit)
            .offset(max(0, more - limit))))
        if len(history) > 2:
            points = [
                {
                    'ordinal': c.ordinal,
                    'errors': c.errors if c.success else None,
                    'warnings': c.warnings if c.success else None,
                    'duration': int((c.finished - c.started).total_seconds())
                } for c in history
            ]
            return {
                'points': points,
                'current': check.ordinal
            }
        else:
            return {}
    def get_html(self, project, check, lines):
        adapter = project.get_adapter()
        for line in lines:
            if 'filename' in line:
                line['link'] = adapter.get_line_url(check.change, line)
        reference = self.get_reference_check(check)
        chart = self.get_chart_data(check)
        self.render('check.html', project=project, check=check, lines=lines, adapter=adapter, reference=reference, chart=chart)
class CompareHandler(BaseHandler):
    def get(self, domain, user, name, check_num, reference_num):
        project = get_project_or_404(domain, user, name)
        adapter = project.get_adapter()
        check = get_check_or_404(project, check_num)
        reference = get_check_or_404(project, reference_num)
        lines = json_decode(check.lines)
        reflines = json_decode(reference.lines)
        rcl = [l['text'] for l in reflines if l.get('task') == 'checks']
        cl = [l['text'] for l in lines if l.get('task') == 'checks']
        diff = unified_diff(rcl, cl, n=max(len(rcl), len(cl)))
        difflines = []
        for text in list(diff)[4:]:
            line = {'text': text}
            if text.startswith('+'):
                line['cls'] = 'added'
            elif text.startswith('-'):
                line['cls'] = 'removed'
            difflines.append(line)
        if not difflines:
            difflines.append({'text': 'Diff is empty', 'cls': 'meta'})
        self.render('compare.html', project=project, check=check, reference=reference, lines=difflines, adapter=adapter)
class StatusHandler(BaseHandler):
    def get(self, domain, user, name):
        project = get_project_or_404(domain, user, name)
        checks = (Check
            .select(*Check.get_light_fields())
            .where(Check.project == project)
            .order_by(Check.ordinal.desc()))
        branch = self.get_argument('branch', None)
        if branch is not None:
            checks = checks.join(Change).where(Change.branch == branch)
        check = checks.first()
        parts = [('#555', 30, 14.5, 'lint')]
        if check is None or not check.success:
            parts.append(('#777', 62, 30.5, 'unknown'))
        elif check.errors or check.warnings:
            if check.errors:
                msg = self.locale.translate(
                    '{} error', '{} errors', check.errors)
                text = msg.format(check.errors)
                width = 7 + 6 * len(text) + 7
                parts.append(('#da314b', width, width // 2 - 0.5, text))
            if check.warnings:
                msg = self.locale.translate(
                    '{} warning', '{} warnings', check.warnings)
                text = msg.format(check.warnings)
                width = 7 + 6 * len(text) + 9
                parts.append(('#faa732', width, width // 2 + 0.5, text))
        else:
            parts.append(('#8cc14c', 60, 29.5, 'all clean'))
        width = sum(p[1] for p in parts)
        self.set_header('Content-Type', 'image/svg+xml; charset=utf-8')
        self.render('status.svg', width=width, parts=parts, height=20)
class DotHandler(BaseHandler):
    def get(self, domain, user, name, check_num):
        project = get_project_or_404(domain, user, name)
        checks = (Check
            .select(*Check.get_light_fields())
            .where(Check.project == project)
            .order_by(Check.ordinal.desc()))
        if check_num != 'latest':
            checks = checks.where(Check.ordinal == check_num)
        branch = self.get_argument('branch', None)
        if branch is not None:
            checks = checks.join(Change).where(Change.branch == branch)
        check = checks.first()
        if check is None:
            color = 'transparent'
        elif not check.success:
            color = '#777'
        elif check.errors:
            color = '#da314b'
        elif check.warnings:
            color = '#faa732'
        else:
            color = '#8cc14c'
        self.set_header('Content-Type', 'image/svg+xml; charset=utf-8')
        self.render('dot.svg', color=color)
class ErrorHandler(BaseHandler, BaseErrorHandler):
    pass