#!/usr/bin/env python3
from argparse import ArgumentParser
from glob import glob
import getpass
import hashlib
import json
import math
import os
import subprocess
import sys
import urllib.parse
import urllib.request

import ox
import ox.web.auth


base_url = None
prefix = '/mnt'
render = './cache'
pandora_client_config = {}
use_local = False


if os.path.exists('files.json'):
    files = json.load(open('files.json'))
else:
    files = {}

def get_volume_prefix(name):
    path = pandora_client_config.get('volumes', {}).get(name)
    if path:
        return path
    else:
        return os.path.join(prefix, name)

def get_info(api, oshash, item, part):
    if oshash not in files:
        r = api.findMedia({
            'query': {
                'conditions': [{'key': 'oshash', 'value': oshash}]
            },
            'keys': ['id', 'instances', 'resolution']
        })['data']
        if not r['items'][0]['instances']:
            if use_local:
                print(r, item, part)
                raise Exception('item without instance')
        files[oshash] = {
            'resolution': r['items'][0]['resolution']
        }
        if r['items'][0]['instances']:
            volume_prefix = get_volume_prefix(r['items'][0]['instances'][0]['volume'])
            files[oshash]['path'] = os.path.join(volume_prefix, r['items'][0]['instances'][0]['path'])
    return files[oshash]

def normalize(name):
    return name.replace(':', '_').replace('/', '_')

def sort_clips(edit, sort):
    clips = edit['clips']
    idx = 0
    for clip in clips:
        clip['index'] = idx
        idx += 1
    reverse = False
    if sort.startswith('+'):
        reverse = False
        sort = sort[1:]
    elif sort.startswith('-'):
        reverse = True
        sort = sort[1:]
    last = '' if reverse else 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
    if sort == 'manual':
        s = clips
        if reverse:
            s = reversed(s)
    elif sort in [
        'id', 'index', 'in', 'out', 'duration',
        'title', 'director', 'year', 'videoRatio',
    ]:
        s = sorted(clips, key=lambda c: (ox.sort_string(str(c.get(sort, last))), c['title'], c['in'], c['out']))
        if reverse:
            s = reversed(s)
    else:
        ids = api.sortClips({
            'edit': edit['id'],
            'sort': [{'key': sort, 'operator': '-' if reverse else '+'}]
        })['data']['clips']
        #print(set(c['id'] for c in clips) - set(ids))
        #print(set(ids) - set(c['id'] for c in clips))

        s = sorted(clips, key=lambda c: ids.index(c['id']) if c['id'] in ids else -1)
    return s

def get_pandora_media_path(oshash):
    h = oshash
    path = '/srv/pandora/data/media/' + '/'.join([h[:2], h[2:4], h[4:6], h[6:]])
    path = glob('%s/data.*' % path)
    if path:
        path = path[0]
    else:
        path = ox.sorted_strings(glob('%s/*.mp4' % path))[-1]
    return path

def cache_clips(api, videos, use_source=False, use_pandora=False):
    for clip in videos:
        if clip.get("titletext"):
            continue
        out = '%s/%s.mp4' % (render, clip['oshash'])
        if 'path' in clip:
            clip['src'] = clip['path']
        clip['path'] = out
        if not os.path.exists(out):
            if use_pandora:
                os.symlink(get_pandora_media_path(clip['oshash']), out)
            else:
                url = clip['url']
                if use_source:
                    name = url.split('/')[-1].split('.')[0]
                    resolution, part = name.split('p')
                    if part and part.isdigit():
                        part = int(part)
                    else:
                        part = 1
                    url = '/'.join(url.split('/')[:-1] + ['download', 'source', str(part)])
                print(url, out)
                api.save_url(url, out)

def make_title(title):
    from PIL import Image, ImageFont, ImageDraw
    title_mp4 = "cache/title_%s.mp4" % hashlib.sha1(title.encode()).hexdigest()
    title_png = title_mp4.replace('.mp4', '.png')
    if not os.path.exists(title_mp4):
        width = 852
        height = 480
        image = Image.new("RGB", (width, height), "black")
        font = ImageFont.truetype("/usr/share/fonts/truetype/roboto/unhinted/RobotoTTF/Roboto-Regular.ttf", size=30)
        draw = ImageDraw.Draw(image)
        _, _, font_width, font_height = font.getbbox(title)
        new_width = (width - font_width) / 2
        new_height = (height - font_height) / 2
        draw.text((new_width, new_height), title, font=font)
        image.save(title_png)
        cmd = [
            'ffmpeg', '-r', '25',
            '-hide_banner',
            '-nostats', '-loglevel', 'error', '-y',
            '-i', title_png, '-t', '5',
            '-pix_fmt', 'yuv420p',
            title_mp4
        ]
        subprocess.call(cmd)
    clip = {
        "titletext": title,
        "in": 0,
        "out": 5,
        "duration": 5,
        "volume": 1.0,
        "path": title_mp4,
        "oshash": ox.oshash(title_mp4),
    }
    return clip


if __name__ == '__main__':
    usage = "usage: %(prog)s [options] edit-url"
    parser = ArgumentParser(usage=usage)
    parser.add_argument('-p', '--prefix', dest='prefix', type=str,
                        help="prefix to use instead of pandora_client config", default='')
    parser.add_argument('-s', '--source', dest='source', type=str,
                        help="source, local or site", default='site')
    parser.add_argument('-r', '--resolution', dest='stream_resolution', type=int,
                        help="resolution of streams to download i.e. 480, 240, 96 default 480", default=480)
    parser.add_argument('-t', '--title', dest='title', type=str,
                        help="title", default="")
    parser.add_argument('-c', '--config', dest='config',
                        help='config.json containing config',
                        default='~/.ox/client.json')
    parser.add_argument('-o', '--output', dest='output',
                        help='json output',
                        default='')
    parser.add_argument('url', metavar='url', type=str,
                        help='edit url')
    opts = parser.parse_args()
    edit_url = opts.url
    use_local = opts.source == 'local'
    use_source = opts.source == 'source'
    use_pandora = opts.source == 'pandora'
    prefix = opts.prefix
    parts = edit_url.split('/')
    site = parts[2]
    base_url = '/'.join(parts[:3])
    edit_id = urllib.parse.unquote(parts[4]).replace('_', ' ').replace('\t', '_')
    sort_by = parts[6] if len(parts) >= 7 else 'year'
    stream_resolution = opts.stream_resolution

    credentials = None
    config = os.path.expanduser(opts.config)
    if config and os.path.exists(config):
        with open(config) as fd:
            data = json.load(fd)
            if data['url'].startswith(base_url):
                pandora_client_config = data
                credentials = {
                    'username': data['username'],
                    'password': data['password']
                }

    update = False
    if not credentials:
        try:
            credentials = ox.web.auth.get(site)
        except:
            credentials = {}
            print('Please provide your username and password for %s:' % site)
            credentials['username'] = input('Username: ')
            credentials['password'] = getpass.getpass('Password: ')
            update = True

    api = ox.API(base_url + '/api/')
    r = api.signin(**credentials)
    if 'errors' in r.get('data', {}):
        for kv in r['data']['errors'].items():
            print('%s: %s' % kv)
        sys.exit(1)
    if update:
        ox.web.auth.update(site, credentials)
    print('Edit:', edit_id)
    print('Sort:', sort_by)
    r = api.getEdit(id=edit_id)
    if 'data' not in r:
        print(r)
        sys.exit(1)
    if r.get('status', {}).get('code') == 404:
        print(r.get('status', {}).get('text'))
        sys.exit(1)
    edit = r['data']
    videos = []
    subtitles = []
    position = 0
    clips = sort_clips(edit, sort_by)
    if opts.title:
        clips.insert(0, make_title(opts.title))
    for clip in clips:
        if clip.get("titletext"):
            videos.append(clip)
            position += clip['duration']
            position = math.ceil(position / (1/25)) * 1/25
            continue
        clip_out = position + clip['duration']
        clip_subtitles = []
        for sub in clip['layers'].get('subtitles', []):
            value = sub['value'].replace('<br/>', '\n').replace('<br>', '\n').replace('\n\n', '\n')
            subtitles.append({
                'in': max(position, position + sub['in'] - clip['in']),
                'out': min(position + sub['out'] - clip['in'], clip_out),
                'value': value,
            })
            clip_subtitles.append({
                'in': max(0, sub['in'] - clip['in']),
                'out': min(sub['out'] - clip['in'], clip['out'] - clip['in']),
                'value': value,
            })

        part_pos = 0
        for i, duration in enumerate(clip['durations']):
            stream_out = stream_in = None
            if part_pos + duration < clip['in']:
                part_pos += duration
            elif part_pos <= clip['in']:
                stream_in = clip['in'] - part_pos
                stream_out = min(clip['out'] - part_pos, duration)
            elif clip['out'] > part_pos:
                stream_in = 0
                stream_out = min(clip['out'] - part_pos, duration)

            if stream_in is not None and stream_out is not None:
                stream_in = math.ceil(stream_in / (1/25)) * 1/25
                stream_out = math.ceil(stream_out / (1/25)) * 1/25
                info = get_info(api, clip['streams'][i], clip['item'], i+1)
                clip_duration = stream_out - stream_in
                if clip_duration > 0:
                    videos.append({
                        'oshash': clip['streams'][i],
                        'url': '%s/%s/%sp%s.mp4' % (base_url, clip['item'], stream_resolution, i + 1),
                        'item': clip['item'],
                        'annotation': clip.get('annotation'),
                        'resolution': info['resolution'],
                        'in': stream_in,
                        'out': stream_out,
                        'volume': clip.get('volume', 1),
                        'subtitles': clip_subtitles,
                    })
                    if 'path' in info:
                        videos[-1]['path'] = os.path.join(prefix, info['path'])
                part_pos += duration

        position += clip['duration']
        position = math.ceil(position / (1/25)) * 1/25

    if not use_local:
        cache_clips(api, videos, use_source, use_pandora)

    if opts.output:
        name = opts.output.replace('.json', '')
    else:
        name = normalize(edit_id)
        if sort_by != 'year':
            name += '_' + sort_by
    if subtitles:
        with open('%s.srt' % name, 'wb') as fd:
            fd.write(ox.srt.encode(subtitles))
    with open('%s.json' % name, 'w') as fd:
        json.dump(videos, fd, indent=4, ensure_ascii=False)

    with open('files.json', 'w') as fd:
        json.dump(files, fd, indent=4, ensure_ascii=False)
    print('created: %s' % '%s.json' % name)