<!--
  - @copyright Copyright (c) 2020 Jonas Heinrich
  -
  - @author Jonas Heinrich <onny@project-insanity.org>
  -
  - @license GNU AGPL version 3 or any later version
  -
  - This program is free software: you can redistribute it and/or modify
  - it under the terms of the GNU Affero General Public License as
  - published by the Free Software Foundation, either version 3 of the
  - License, or (at your option) any later version.
  -
  - This program is distributed in the hope that it will be useful,
  - but WITHOUT ANY WARRANTY; without even the implied warranty of
  - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  - GNU Affero General Public License for more details.
  -
  - You should have received a copy of the GNU Affero General Public License
  - along with this program. If not, see <http://www.gnu.org/licenses/>.
  -
  -->

<template>
	<Content app-name="podcast">
		<Navigation
			:station-data="tableData" />
		<AppContent>
			<div class="podcastHeader">
				<div
					class="podcastImage"
					:style="{ backgroundImage: `url(${podcast.smallImageURL})` }" />
				<div class="podcastDescription">
					<h1>{{ podcast.title }}</h1>
					<div class="podcastAuthor">
						by <a href="#">{{ podcast.author }}</a>
					</div>
					<div>{{ podcast.description }}</div>
					<ul
						v-for="(category, idx) in podcast.categories"
						:key="idx"
						:class="podcastCategory">
						<li>{{ podcast.categories[idx] }}</li>
					</ul>
				</div>
			</div>
			<Table
				v-show="!pageLoading && podcast.episodes.length > 0"
				v-resize="onResize"
				:episodes="podcast.episodes"
				@doPlay="doPlay" />
			<EmptyContent
				v-if="pageLoading"
				icon="icon-loading" />
			<EmptyContent
				v-if="tableData.length === 0 && !pageLoading"
				:icon="emptyContentIcon">
				{{ emptyContentMessage }}
				<template #desc>
					{{ emptyContentDesc }}
				</template>
			</EmptyContent>
		</AppContent>
	</Content>
</template>

<script>
import Content from '@nextcloud/vue/dist/Components/Content'
import AppContent from '@nextcloud/vue/dist/Components/AppContent'
import EmptyContent from '@nextcloud/vue/dist/Components/EmptyContent'
import Navigation from '../components/Navigation'
import Table from '../components/Table'
import { Howl, Howler } from 'howler'

import { showError } from '@nextcloud/dialogs'
import axios from '@nextcloud/axios'

let audioPlayer = null

export default {
	name: 'Show',
	components: {
		Navigation,
		Content,
		AppContent,
		Table,
		EmptyContent,
	},
	data: () => ({
		podcast: {},
		tableData: [],
		pageLoading: false,
		queryParams: {},
	}),
	computed: {
		player() {
			return this.$store.state.player
		},
		emptyContentMessage() {
			if (this.$route.name === 'FAVORITES') {
				return t('podcast', 'No favorites yet')
			} else if (this.$route.name === 'RECENT') {
				return t('podcast', 'No recent stations yet')
			} else if (this.$route.name === 'SEARCH') {
				return t('podcast', 'No search results')
			}
			return 'No stations here'
		},
		emptyContentIcon() {
			if (this.$route.name === 'FAVORITES') {
				return 'icon-star'
			} else if (this.$route.name === 'RECENT') {
				return 'icon-recent'
			} else if (this.$route.name === 'SEARCH') {
				return 'icon-search'
			}
			return 'icon-podcast'
		},
		emptyContentDesc() {
			if (this.$route.name === 'FAVORITES') {
				return t('podcast', 'Stations you mark as favorite will show up here')
			} else if (this.$route.name === 'RECENT') {
				return t('podcast', 'Stations you recently played will show up here')
			} else if (this.$route.name === 'SEARCH') {
				return t('podcast', 'No stations were found matching your search term')
			}
			return t('podcast', 'No stations here')
		},
	},
	watch: {
		$route: 'onRoute',
		'player.volume'(newVolume, oldVolume) {
			if (audioPlayer !== null) {
				audioPlayer.volume(newVolume)
			}
		},
		'player.isPaused'(newState, oldState) {
			if (newState === true && audioPlayer !== null) {
				audioPlayer.pause()
			} else if (newState === false && audioPlayer !== null) {
				audioPlayer.play()
			}
		},
	},
	created() {
		this.loadSettings()
	},
	mounted() {
		this.onRoute()
		this.scroll()
	},
	methods: {

		onResize({ width, height }) {
			const contentHeight = document.getElementById('app-content-vue').scrollHeight
			const tableHeight = height
			if (tableHeight < contentHeight) {
				this.preFill()
			}
		},

		preFill() {
			const route = this.$route
			console.log(route)
			// this.queryPodcast(route.name)
		},

		async onRoute() {
			this.tableData = []
			this.pageLoading = true
			const podcastId = this.$route.params.id
			this.queryPodcast(podcastId)
		},

		/**
			 * Start playing a podcast episode
			 * @param {Object} episode Episode object
			 */
		async doPlay(episode) {
			const vm = this

			vm.$store.dispatch('isBuffering', true)

			if (audioPlayer !== null) {
				audioPlayer.fade(vm.player.volume, 0, 500)
			}
			vm.$store.dispatch('setTitle', episode.title)

			Howler.unload()
			audioPlayer = new Howl({
				src: episode.enclosure,
				html5: true,
				volume: vm.player.volume,
				onplay() {
					vm.$store.dispatch('isPlaying', true)
					vm.$store.dispatch('isBuffering', false)
				},
				onpause() {
					vm.$store.dispatch('isPlaying', false)
					vm.$store.dispatch('isBuffering', false)
				},
				onend() {
					showError(t('podcast', 'Lost connection to podcast station, retrying ...'))
					vm.$store.dispatch('isPlaying', false)
					vm.$store.dispatch('isBuffering', true)
				},
			})
			audioPlayer.unload()
			audioPlayer.play()
			audioPlayer.fade(0, vm.player.volume, 500)
		},

		async queryPodcast(podcastId) {

			const vm = this
			podcastId = 1084

			const queryURI = 'https://api.fyyd.de/0.2/podcast/episodes?podcast_id=' + podcastId
			try {
				delete axios.defaults.headers.requesttoken
				await axios.get(queryURI)
					.then(function(response) {
						vm.processPodcast(response.data)
					})
			} catch (error) {
				showError(t('podcast', 'Could not fetch stations from remote API'))
			}
		},

		processPodcast(podcast) {
			this.podcast = podcast.data
			this.pageLoading = false
		},

		/**
		 * On scroll event, load more stations if bottom reached
		 */
		scroll() {
			window.onscroll = () => {
				if ((window.innerHeight + window.scrollY) >= document.body.scrollHeight) {
					const route = this.$route
					console.log(route)
					// this.queryPodcast(route.name)
		    }
			}
		},
		loadSettings() {

			// axios.defaults.headers.common = {
			// 'User-Agent': 'Nextcloud Podcast App/' + this.$version,
			// }
			this.$store.dispatch('getVolumeState')

		},

	},
}
</script>

<style lang="scss">

@media only screen and (min-width: 1024px) {
	.app-navigation-toggle {
		display: none;
	}
}

.podcastHeader {
	width: 100%;
	background: black;
	min-height: 300px;
	display: flex;
	color: white;
	justify-content: center;
	padding: 40px 20px;
	gap: 30px;

	.podcastImage {
		width: 230px;
		height: 230px;
		background: red;
		background-size: cover;
		background-position: center center;
	}

	.podcastDescription {
		max-width: 500px;
		max-height: 200px;
		overflow: hidden;
		text-overflow: ellipsis;
		color: #ddd;

		h1 {
			font-size: 30px;
			font-weight: bold;
			line-height: 1.2em;
			color: white;
		}

		.podcastAuthor {
			padding-bottom: 10px;

			a {
				color: white;
			}
		}

		ul.podcastCategory li {
			padding: 5px;
			background: red;
		}

	}

}

</style>