<template>
	<div class="download-object">
		<div class="download-info">
			<img width="75px" class="rounded coverart" :src="queueItem.cover" :alt="`Cover ${queueItem.title}`" />

			<div class="download-info-data">
				<span class="download-line">{{ queueItem.title }}</span> <span class="download-slim-separator"> - </span>
				<span>{{ queueItem.artist }}</span>
			</div>

			<div class="download-info-status" style="text-align: center">
				<span class="download-line"> {{ queueItem.downloaded + queueItem.failed }}/{{ queueItem.size }} </span>

				<span
					v-if="hasFails"
					class="flex items-center"
					:class="{ clickable: hasFails }"
					style="justify-content: center"
					@click="hasFails ? $emit('show-errors', queueItem) : null"
				>
					{{ queueItem.failed }}
					<i class="material-icons">error_outline</i>
				</span>
			</div>
		</div>

		<div class="download-bar">
			<div class="progress">
				<div :class="barClass" :style="barStyle"></div>
			</div>
			<i
				v-if="!isLoading"
				class="material-icons queue_icon"
				:class="{ clickable: finishedWithFails || resultIconText === 'delete_forever' }"
				@click="onResultIconClick"
			>
				{{ resultIconText }}
			</i>
			<div v-else class="circle-loader"></div>
		</div>
	</div>
</template>

<script>
const possibleStates = ['converting', 'downloading', 'download finished', 'completed']

export default {
	props: {
		queueItem: {
			type: Object,
			default: () => ({})
		}
	},
	data() {
		return {
			isLoading: false
		}
	},
	computed: {
		hasFails() {
			return this.queueItem.failed >= 1
		},
		allFailed() {
			let allFailed = false

			if (this.queueItem.status === 'download finished') {
				allFailed = this.queueItem.size !== 0 && this.queueItem.failed === this.queueItem.size
			}

			return allFailed
		},
		finishedWithFails() {
			return this.queueItem.status === 'download finished' && this.hasFails
		},
		isDeterminateStatus() {
			return possibleStates.includes(this.queueItem.status)
		},
		barClass() {
			return {
				converting: this.queueItem.status === 'converting',
				indeterminate: !this.isDeterminateStatus,
				determinate: this.isDeterminateStatus
			}
		},
		barStyle() {
			let width = 0
			let backgroundColor = 'var(--primary-color)'

			if (this.hasFails) {
				// Orange
				backgroundColor = 'hsl(33, 100%, 47%)'
			} else {
				// Green
				backgroundColor = 'hsl(150, 76%, 34%)'
			}

			if (this.allFailed) {
				// Red
				backgroundColor = 'hsl(360, 100%, 35%)'
			}

			if (this.queueItem.status === 'download finished') {
				width = 100
			}

			if (this.queueItem.status === 'downloading') {
				width = this.queueItem.progress
			}

			if (this.queueItem.status === 'converting') {
				width = 100 - this.queueItem.conversion
				backgroundColor = 'hsl(46, 100%, 50%)'
			}

			return {
				width: `${width}%`,
				backgroundColor
			}
		},
		resultIconText() {
			let text = 'delete_forever'

			if (this.queueItem.status === 'download finished') {
				if (!this.hasFails) {
					text = 'done'
				} else if (this.queueItem.failed >= this.queueItem.size) {
					text = 'error'
				} else {
					text = 'warning'
				}
			}

			return text
		}
	},
	methods: {
		onResultIconClick() {
			if (this.isDeterminateStatus) {
				if (this.finishedWithFails) {
					this.$emit('show-errors', this.queueItem)
				}

				if (this.queueItem.status === 'downloading') {
					this.isLoading = true
					this.$emit('remove-item', this.queueItem.uuid)
				}
			} else {
				this.isLoading = true
				this.$emit('remove-item', this.queueItem.uuid)
			}
		}
	}
}
</script>

<style lang="scss">
.download-object {
	padding-bottom: 8px;

	.download-info {
		display: flex;
		align-items: center;

		img {
			height: 75px;
			flex: 0 0 75px;
		}

		.download-line {
			display: block;
		}

		.download-slim-separator {
			display: none;
		}
	}

	.download-info-data {
		flex: 1 50%;
		margin-left: 8px;
		overflow: hidden;
	}

	.download-info-status {
		flex: 1 15%;
		margin-left: 8px;
		width: 80px;
	}

	> .download-bar {
		display: flex;
		align-items: center;
		height: 24px;

		> .queue_icon {
			cursor: default;
			margin-left: 8px;
		}

		> .progress {
			margin: 0;
		}
	}
}

#download_list:not(.slim) .download-line {
	overflow: hidden;
	white-space: nowrap;
	text-overflow: ellipsis;
}

#download_list.slim {
	> .download-object {
		.download-info {
			display: block;

			img {
				display: none;
			}

			.download-line {
				display: inline-block;
			}

			.download-slim-separator {
				display: inline-block;
			}
		}

		.download-info-data {
			width: calc(80% - 16px);
			display: inline-block;
			padding-left: 0;
		}

		.download-info-status {
			width: 20%;
			display: inline-block; // ignored due to float
			float: right;
		}
	}
}

.progress {
	position: relative;
	height: 4px;
	display: block;
	width: 100%;
	background-color: var(--secondary-background);
	border-radius: 2px;
	margin: 0.5rem 0 1rem 0;
	overflow: hidden;

	.determinate {
		position: absolute;
		top: 0;
		left: 0;
		bottom: 0;
		background-color: var(--primary-color);
		transition: width 0.3s linear;
	}

	.converting {
		background-color: var(--secondary-color);
		transition: none !important;
	}

	.indeterminate {
		background-color: var(--primary-color);

		&::before {
			content: '';
			position: absolute;
			background-color: inherit;
			top: 0;
			left: 0;
			bottom: 0;
			will-change: left, right;
			animation: indeterminate 2.1s cubic-bezier(0.65, 0.815, 0.735, 0.395) infinite;
		}

		&::after {
			content: '';
			position: absolute;
			background-color: inherit;
			top: 0;
			left: 0;
			bottom: 0;
			will-change: left, right;
			animation: indeterminate-short 2.1s cubic-bezier(0.165, 0.84, 0.44, 1) infinite;
			animation-delay: 1.15s;
		}
	}
}

@keyframes indeterminate {
	0% {
		left: -35%;
		right: 100%;
	}
	60% {
		left: 100%;
		right: -90%;
	}
	100% {
		left: 100%;
		right: -90%;
	}
}

@keyframes indeterminate-short {
	0% {
		left: -200%;
		right: 100%;
	}
	60% {
		left: 107%;
		right: -8%;
	}
	100% {
		left: 107%;
		right: -8%;
	}
}
</style>
