<template>
<div class="t9makv94">
	<portal to="icon"><fa :icon="faPalette"/></portal>
	<portal to="title">{{ $t('themeEditor') }}</portal>

	<section class="_card">
		<div class="_content">
			<mk-input v-model="name" required><span>{{ $t('name') }}</span></mk-input>
			<mk-input v-model="author" required><span>{{ $t('author') }}</span></mk-input>
			<mk-textarea v-model="description"><span>{{ $t('description') }}</span></mk-textarea>
			<div class="_inputs">
				<div v-text="$t('_theme.base')" />
				<mk-radio v-model="baseTheme" value="light">{{ $t('light') }}</mk-radio>
				<mk-radio v-model="baseTheme" value="dark">{{ $t('dark') }}</mk-radio>
			</div>
		</div>
		<div class="_content">
			<div class="list-view">
				<div class="item" v-for="([ k, v ], i) in theme" :key="k">
					<div class="_inputs">
						<div>
							{{ k.startsWith('$') ? `${k} (${$t('_theme.constant')})` : $t('_theme.keys.' + k) }}
							<button v-if="k.startsWith('$')" class="_button _link" @click="del(i)" v-text="$t('delete')" />
						</div>
						<div>
							<div class="type" @click="chooseType($event, i)">
								{{ getTypeOf(v) }} <fa :icon="faChevronDown"/>
							</div>
							<!-- default -->
							<div v-if="v === null" v-text="baseProps[k]" class="default-value" />
							<!-- color -->
							<div v-else-if="typeof v === 'string'" class="color">
								<input type="color" :value="v" @input="colorChanged($event.target.value, i)"/>
								<mk-input class="select" :value="v" @input="colorChanged($event, i)"/>
							</div>
							<!-- ref const -->
							<mk-input v-else-if="v.type === 'refConst'" v-model="v.key">
								<template #prefix>$</template>
								<span>{{ $t('name') }}</span>
							</mk-input>
							<!-- ref props -->
							<mk-select class="select" v-else-if="v.type === 'refProp'" v-model="v.key">
								<option v-for="key in themeProps" :value="key" :key="key">{{ $t('_theme.keys.' + key) }}</option>
							</mk-select>
							<!-- func -->
							<template v-else-if="v.type === 'func'">
								<mk-select class="select" v-model="v.name">
									<template #label>{{ $t('_theme.funcKind') }}</template>
									<option v-for="n in ['alpha', 'darken', 'lighten']" :value="n" :key="n">{{ $t('_theme.' + n) }}</option>
								</mk-select>
								<mk-input type="number" v-model="v.arg"><span>{{ $t('_theme.argument') }}</span></mk-input>
								<mk-select class="select" v-model="v.value">
									<template #label>{{ $t('_theme.basedProp') }}</template>
									<option v-for="key in themeProps" :value="key" :key="key">{{ $t('_theme.keys.' + key) }}</option>
								</mk-select>
							</template>
						</div>
					</div>
				</div>
				<mk-button primary @click="addConst">{{ $t('_theme.addConstant') }}</mk-button>
			</div>
		</div>
		<div class="_content">
				<mk-textarea v-model="themeToImport">
					{{ $t('_theme.importInfo') }}
				</mk-textarea>
				<mk-button :disabled="!themeToImport.trim()" @click="importTheme">{{ $t('import') }}</mk-button>
		</div>
		<div class="_footer">
			<mk-button inline @click="preview">{{ $t('preview') }}</mk-button>
			<mk-button inline primary :disabled="!name || !author" @click="save">{{ $t('save') }}</mk-button>
		</div>
	</section>
</div>
</template>

<script lang="ts">
import Vue from 'vue';
import { faPalette, faChevronDown, faKeyboard } from '@fortawesome/free-solid-svg-icons';
import * as JSON5 from 'json5';

import MkRadio from '../components/ui/radio.vue';
import MkButton from '../components/ui/button.vue';
import MkInput from '../components/ui/input.vue';
import MkTextarea from '../components/ui/textarea.vue';
import MkSelect from '../components/ui/select.vue';

import { convertToMisskeyTheme, ThemeValue, convertToViewModel, ThemeViewModel } from '../scripts/theme-editor';
import { Theme, applyTheme, lightTheme, darkTheme, themeProps, validateTheme } from '../scripts/theme';
import { toUnicode } from 'punycode';
import { host } from '../config';

export default Vue.extend({
	components: {
		MkRadio,
		MkButton,
		MkInput,
		MkTextarea,
		MkSelect
	},
	metaInfo() {
		return {
			title: this.$t('themeEditor') + (this.changed ? '*' : '')
		};
	},

	data() {
		return {
			theme: [] as ThemeViewModel,
			name: '',
			description: '',
			baseTheme: 'light' as 'dark' | 'light',
			author: `@${this.$store.state.i.username}@${toUnicode(host)}`,
			themeToImport: '',
			changed: false,
			faPalette, faChevronDown, faKeyboard,
			lightTheme, darkTheme, themeProps,
		}
	},

	computed: {
		baseProps() {
			return this.baseTheme === 'light' ? this.lightTheme.props : this.darkTheme.props;
		},
	},

	beforeDestroy() {
		window.removeEventListener('beforeunload', this.beforeunload);
	},

	async beforeRouteLeave(to, from, next) {
		if (this.changed && !(await this.confirm())) {
			next(false);
		} else {
			next();
		}
	},

	mounted() {
		this.init();
		window.addEventListener('beforeunload', this.beforeunload);
		const changed = () => this.changed = true;
		this.$watch('name', changed);
		this.$watch('description', changed);
		this.$watch('baseTheme', changed);
		this.$watch('author', changed);
		this.$watch('theme', changed);
	},

	methods: {
		beforeunload(e: BeforeUnloadEvent) {
			if (this.changed) {
				e.preventDefault();
				e.returnValue = '';
			}
		},

		async confirm(): Promise<boolean> {
			const { canceled } = await this.$root.dialog({
				type: 'warning',
				text: this.$t('leaveConfirm'),
				showCancelButton: true
			});
			return !canceled;
		},

		init() {
			const t: ThemeViewModel = [];
			for (const key of themeProps) {
				t.push([ key, null ]);
			}
			this.theme = t;
		},
	
		async del(i: number) {
			const { canceled } = await this.$root.dialog({ 
				type: 'warning',
				showCancelButton: true,
				text: this.$t('_theme.deleteConstantConfirm', { const: this.theme[i][0] }),
			});
			if (canceled) return;
			Vue.delete(this.theme, i);
		},
	
		async addConst() {
			const { canceled, result } = await this.$root.dialog({
				title: this.$t('_theme.inputConstantName'),
				input: true
			});
			if (canceled) return;
			this.theme.push([ '$' + result, '#000000']);
		},
	
		save() {
			const theme = convertToMisskeyTheme(this.theme, this.name, this.description, this.author, this.baseTheme);
			const themes = this.$store.state.device.themes.concat(theme);
			this.$store.commit('device/set', {
				key: 'themes', value: themes
			});
			this.$root.dialog({
				type: 'success',
				text: this.$t('_theme.installed', { name: theme.name })
			});
			this.changed = false;
		},
	
		preview() {
			const theme = convertToMisskeyTheme(this.theme, this.name, this.description, this.author, this.baseTheme);
			try {
				applyTheme(theme, false);
			} catch (e) {
				this.$root.dialog({
					type: 'error',
					text: e.message
				});
			}
		},
	
		async importTheme() {
			if (this.changed && (!await this.confirm())) return;

			try {
				const theme = JSON5.parse(this.themeToImport) as Theme;
				if (!validateTheme(theme)) throw new Error(this.$t('_theme.invalid'));

				this.name = theme.name;
				this.description = theme.desc || '';
				this.author = theme.author;
				this.baseTheme = theme.base || 'light';
				this.theme = convertToViewModel(theme);
				this.themeToImport = '';
			} catch (e) {
				this.$root.dialog({
					type: 'error',
					text: e.message
				});
			}
		},
	
		colorChanged(color: string, i: number) {
			Vue.set(this.theme, i, [this.theme[i][0], color]);
		},
	
		getTypeOf(v: ThemeValue) {
			return v === null
				? this.$t('_theme.defaultValue')
				: typeof v === 'string'
					? this.$t('_theme.color')
					: this.$t('_theme.' + v.type);
		},
	
		async chooseType(e: MouseEvent, i: number) {
			const newValue = await this.showTypeMenu(e);
			Vue.set(this.theme, i, [ this.theme[i][0], newValue ]);
		},
	
		showTypeMenu(e: MouseEvent) {
			return new Promise<ThemeValue>((resolve) => {
				this.$root.menu({
					items: [{
						text: this.$t('_theme.defaultValue'),
						action: () => resolve(null),
					}, {
						text: this.$t('_theme.color'),
						action: () => resolve('#000000'),
					}, {
						text: this.$t('_theme.func'),
						action: () => resolve({
							type: 'func', name: 'alpha', arg: 1, value: 'accent'
						}),
					}, {
						text: this.$t('_theme.refProp'),
						action: () => resolve({
							type: 'refProp', key: 'accent',
						}),
					}, {
						text: this.$t('_theme.refConst'),
						action: () => resolve({
							type: 'refConst', key: '',
						}),
					},],
					source: e.currentTarget || e.target,
				});
			});
		}
	}
});
</script>

<style lang="scss" scoped>
.t9makv94 {
	> ._card {
		> ._content {
			> .list-view {
				height: 480px;
				overflow: auto;
				border: 1px solid var(--divider);

				> .item {
					min-height: 48px;
					padding: 0 16px;
					word-break: break-all;

					&:not(:last-child) {
						padding-bottom: 8px;
					}

					.select {
						margin: 24px 0;
					}

					.type {
						cursor: pointer;
					}

					.default-value {
						opacity: 0.6;
						pointer-events: none;
						user-select: none;
					}

					.color {
						> input {
							display: inline-block;
							width: 1.5em;
							height: 1.5em;
						}

						> div {
							margin-left: 8px;
							display: inline-block;
						}
					}
				}

				> ._button {
					margin: 16px;
				}
			}
		}
	}
}
</style>
