const dayjs = require('dayjs')
const utc = require('dayjs/plugin/utc')
const timezone = require('dayjs/plugin/timezone')
const customParseFormat = require('dayjs/plugin/customParseFormat')

dayjs.extend(utc)
dayjs.extend(timezone)
dayjs.extend(customParseFormat)
const tz = 'Europe/Prague'

module.exports = {
    site: 'skylink.cz',
    url({channel, date}) {
        const diff = date.diff(dayjs.utc().startOf('d'), 'd')
        return `https://services.mujtvprogram.cz/tvprogram2services/services/tvprogrammelist_mobile.php?channel_cid=${channel.site_id}&day=${diff}`
    },
    parser({ content}) {
        let programs = []
        const items = parseItems(content)
        items.forEach(item => {
            programs.push({
                title: item.name,
                start: parseTime(item.startDate),
                stop: parseTime(item.endDate),
                description: item.longDescription || item.shortDescription,
                category: parseCategory(item),
                date: item.year || null,
                director: parseList(item.directors),
                actor: parseList(item.actors)
            })
        })
        return programs
    }
}

function parseItems(content) {
    try {
        const data = JSON.parse(content)
        if (!data) return []
        const programmes = data['tv-program-programmes']
        return programmes && Array.isArray(programmes) ? programmes : []
    } catch (err) {
        return []
    }
}

function parseList(list) {
    return typeof list === 'string' ? list.split(',') : []
  }
function parseTime(time) {
    return dayjs(time, 'DD.MM.YYYY HH.mm').tz(tz)
}

function parseCategory(item) {
    if (!item['programme-type']) return null
    return item['programme-type'].name
}