#!/usr/bin/env python
from __future__ import print_function
from __future__ import absolute_import

# check for the venv
from lib import sanity_check
sanity_check.check_venv(__file__)

from collections import defaultdict
from typing import Any, Dict, Iterable, List, Set

import cgi
import os
import pprint
import re
import ujson

Call = Dict[str, Any]

def clean_up_pattern(s):
    # type: (str) -> str
    paren_level = 0
    in_braces = False
    result = ''
    prior_char = None
    for c in s:
        if c == '(':
            paren_level += 1
        if c == '<' and prior_char == 'P':
            in_braces = True
        if in_braces or (paren_level == 0):
            if c != '?':
                result += c
        if c == ')':
            paren_level -= 1
        if c == '>':
            in_braces = False
        prior_char = c
    return result

def encode_info(info):
    # type: (Any) -> str
    try:
        result = ''
        try:
            info = ujson.loads(info)
            result = '(stringified)\n'
        except Exception:
            pass
        result += cgi.escape(pprint.pformat(info, indent=4))
        return '<pre>' + result + '</pre>'
    except Exception:
        pass
    try:
        return cgi.escape(str(info))
    except Exception:
        pass
    return 'NOT ENCODABLE'

def fix_test_name(s):
    # type: (str) -> str
    return s.replace('zerver.tests.', '')

def create_single_page(pattern, out_dir, href, calls):
    # type: (str, str, str, List[Any]) -> None
    fn = out_dir + '/' + href
    with open(fn, 'w') as f:
        f.write('''
            <style>
            .test {
                margin: 20px;
            }
            </style>
            ''')
        f.write('<h3>%s</h3>\n' % (cgi.escape(pattern),))
        calls.sort(key=lambda call: call['status_code'])
        for call in calls:
            f.write('<hr>')
            f.write('\n%s' % (fix_test_name(call['test_name']),))
            f.write('<div class="test">')
            try:
                f.write(call['url'])
            except Exception:
                f.write(call['url'].encode('utf8'))
            f.write('<br>\n')
            f.write(call['method'] + '<br>\n')
            f.write('status code: %s<br>\n' % (call['status_code'],))
            f.write('<br>')
            if call['info']:
                f.write('info: %s<br>\n' % (encode_info(call['info']),))
            if call['kwargs']:
                f.write('kwargs: %s<br>\n' % (encode_info(call['kwargs']),))
            f.write('</div>')

def create_user_docs():
    # type: () -> None
    fn = 'var/url_coverage.txt' # TODO: make path more robust, maybe use json suffix

    out_dir = 'var/api_docs'
    try:
        os.mkdir(out_dir)
    except OSError:
        pass

    main_page = out_dir + '/index.html'

    with open(main_page, 'w') as f:
        f.write('''
            <style>
            li {
                list-style-type: none;
            }

            a {
                text-decoration: none;
            }
            </style>
            ''')

        calls = []
        for line in open(fn):
            calls.append(ujson.loads(line))

        pattern_dict = defaultdict(list) # type: Dict[str, List[Call]]
        for call in calls:
            if 'pattern' in call:
                pattern = clean_up_pattern(call['pattern'])
                if pattern:
                    pattern_dict[pattern].append(call)

        patterns = set(pattern_dict.keys())

        tups = [
            ('api/v1/external', 'webhooks'),
            ('api/v1', 'api'),
            ('json', 'legacy'),
        ]

        groups = dict() # type: Dict[str, Set[str]]
        for prefix, name in tups:
            groups[name] = {p for p in patterns if p.startswith(prefix)}
            patterns -= groups[name]

        groups['other'] = patterns

        for name in ['api', 'legacy', 'webhooks', 'other']:
            f.write(name + ' endpoints:\n\n')
            f.write('<ul>\n')
            for pattern in sorted(groups[name]):
                href = pattern.replace('/', '-') + '.html'
                link = '<a href="%s">%s</a>' % (href, cgi.escape(pattern))
                f.write('<li>' + link + '</li>\n')
                create_single_page(pattern, out_dir, href, pattern_dict[pattern])
            f.write('</ul>')
            f.write('\n')

    print('open %s' % (main_page,))


if __name__ == '__main__':
    create_user_docs()