'use strict';

// 每次改动递增。Eagle 里的 service 插件是启动时加载并常驻的，改完代码必须重新加载插件
// 才会生效；状态栏会显示这个版本号，方便确认加载的到底是不是最新代码。
const VERSION = 'v67';
const SHOW_DEV_VERSION = true;

const path = require('path');
const os = require('os');
const fs = require('fs');
const i18n = window.SpineThumbI18n;
const t = i18n ? i18n.t : (key) => key;

// 本地模块由 index.html 用 <script> 标签按顺序加载后挂在 window 上。
const REQUIRED = [
	'SpineThumbI18n',
	'SpineThumbLibraryWatcher', 'SpineThumbSpineAssets', 'SpineThumbRenderer', 'SpineThumbSettings',
	'SpineUtils', 'SpineBadge', 'SpineVisibleBounds', 'SpineAnimatedProfiles', 'SpineAnimatedWebpEncoder',
	'SpineThumbProgress',
];
const missing = REQUIRED.filter((name) => !window[name]);
if (missing.length) {
	const modules = missing.join(', ');
	document.getElementById('status').textContent = t('thumb.modulesMissing', { modules });
	throw new Error(t('thumb.moduleLoadError', { modules }));
}
const { createLibraryWatcher, cleanupStaleFiles } = window.SpineThumbLibraryWatcher;
const { scanSpineItems } = window.SpineThumbSpineAssets;
const { renderThumbnailAuto, withTimeout } = window.SpineThumbRenderer;
const settingsStore = window.SpineThumbSettings;
const utils = window.SpineUtils;
const progress = window.SpineThumbProgress;

const statusEl = document.getElementById('status');
const libraryEl = document.getElementById('library');
const statsEl = document.getElementById('stats');
const logEl = document.getElementById('log');
const toggleEl = document.getElementById('toggle');
const clearEl = document.getElementById('clear');
const filtersEl = document.getElementById('filters');
const modeEl = document.getElementById('mode');
const strategyEl = document.getElementById('strategy');

const stats = { batches: 0, added: 0, spine: 0, complete: 0, generated: 0, skipped: 0, failed: 0 };
// 一次排队超过这个数量（动态模式）才开进度弹窗（这种批量通常要等很久）。
// 判定用排队数，不要求最终真的都产出动态 WebP。
const PROGRESS_MIN_DYNAMIC = 10;
// 弹窗上的「停止」按钮会把动作写进这个文件，宿主读回来执行暂停/继续/取消。
const CONTROL_FILE = path.join(os.tmpdir(), 'spine-thumbnail-progress-control.json');
const STALE_TEMP_AGE_MS = 24 * 60 * 60 * 1000;
let settings = { ...settingsStore.DEFAULTS };
let libraryPath = null;
let imagesDir = null;
const queue = [];
let running = false;
// 本轮（一次队列排空）的统计和是否要开进度弹窗的标记；排空后一起清掉。
let runStats = null;
let runShowsProgress = false;
// 弹窗暂停期间，队列原地等待，不再取出新的素材。
let paused = false;
let lastControlAt = 0;
let versionLogged = false;
// 「待观察」：本次配套不全的资产记在这里，下一批导入时连带重新检查。
// Eagle 的重复添加提示会把一次导入拆成几批，靠它才能等齐配套文件。
const pending = new Set();


function log(message, kind) {
	const line = document.createElement('li');
	if (kind) line.className = kind;
	line.textContent = '[' + new Date().toTimeString().slice(0, 8) + '] ' + message;
	logEl.appendChild(line);
	while (logEl.childElementCount > 400) logEl.removeChild(logEl.firstElementChild);
	logEl.scrollTop = logEl.scrollHeight;
	console.log('[SpineThumbnailGenerateServer] ' + message);
}

function logVersion() {
	if (!SHOW_DEV_VERSION || versionLogged) return;
	versionLogged = true;
	log(t('thumb.version', { version: VERSION }));
}

function setStatus(text) {
	statusEl.textContent = text;
}

function refreshStats() {
	statsEl.textContent = t('thumb.stats', stats);
}

function itemIdOf(dirName) {
	return String(dirName).replace(/\.info$/i, '');
}

// Eagle 里同一个文件可能同时存在于多个文件夹（34-43/3.7/tank 这种），只写 item id
// 用户看不出是哪一份。这里把文件夹 id 还原成 Eagle 界面上显示的路径。
// 文件夹树每批重读一次（见 handleBatchAsync）：导入会新建文件夹、同一会话里也可能重建
// 素材库，跨批次复用旧 id 的话日志会整片变成「未分类」。
let folderPaths = null;

function loadFolderPaths() {
	folderPaths = new Map();
	try {
		const tree = JSON.parse(fs.readFileSync(path.join(libraryPath, 'metadata.json'), 'utf8')).folders || [];
		const walk = (list, prefix) => {
			for (const f of list || []) {
				const full = prefix + (f.name || f.id);
				folderPaths.set(f.id, full);
				walk(f.children, full + '/');
			}
		};
		walk(tree, '');
	} catch (error) { /* 读不到就只显示未分类 */ }
}

function folderPathOf(folderIds) {
	if (!folderPaths) loadFolderPaths();
	const id = (Array.isArray(folderIds) && folderIds[0]) || null;
	return (id && folderPaths.get(id)) || t('thumb.uncategorized');
}

/** 日志里的渲染结果描述。 */
function describeThumbnail(rendered) {
	const kb = Math.max(1, Math.round(rendered.buffer.length / 1024));
	if (rendered.mode === 'animated') {
		return t('thumb.thumbnailDetailsAnimated', {
			size: rendered.detail + '*' + rendered.detail,
			fps: rendered.fps,
			quality: rendered.quality,
			kb,
			target: rendered.targetKilobytes,
			frames: rendered.frames,
			animation: rendered.animation,
			strategy: t(rendered.strategy === 'speed' ? 'thumb.bestSpeed' : 'thumb.bestSize'),
			limit: rendered.fits === false ? t('thumb.limitNote') : '',
		});
	}
	return t('thumb.thumbnailDetailsStatic', {
		width: rendered.width,
		height: rendered.height,
		kb,
		fallback: rendered.fallback ? t('thumb.fallbackNote', { text: rendered.fallback }) : '',
	});
}

/**
 * 记本轮（一次队列排空）的产出，顺手把进度推给弹窗。
 * animated 只统计真正做出动态 WebP 的数量；name 用来在弹窗里显示最近完成的文件。
 */
function countRun(outcome, animated, name) {
	if (!runStats) return;
	// 弹窗的暂停/取消随时生效：万一用户在最后一个素材渲染期间点了取消，这里也能记上。
	applyControl();
	runStats[outcome] += 1;
	if (animated) runStats.animated += 1;
	runStats.done += 1;
	runStats.name = name || '';
	if (runShowsProgress) {
		progress.update({ done: runStats.done, total: runStats.total, name: runStats.name });
	}
}

/** 一个素材的缩略图生成流程：查重 → 渲染 → 写临时文件 → 走官方接口设置 → 清理。 */
async function generateOne(item) {
	let tempPath = null;
	// 日志统一用「文件名 ｜ Eagle 文件夹路径」，比 MU9RVSxxxx.info 好认；
	// 这些信息配对阶段就读到了，Eagle API 拿不到素材时也能照样显示。
	const label = item.entryName + ' ｜ ' + folderPathOf(item.folders);
	try {
		const itemId = itemIdOf(item.dirName);
		const eagleItem = await eagle.item.getById(itemId);
		if (!eagleItem) {
			stats.failed += 1;
			countRun('failed', false, item.entryName);
			log(t('thumb.missingItem', { label }), 'warn');
			return;
		}
		// 复合后缀（.skel.bytes / .atlas.txt）：Eagle 只按最后一个点拆 name/ext，atlas.txt
		// 会被当成纯文本，卡片写死成文本预览，自定义缩略图根本显示不出来。把整段后缀塞进
		// ext 后 Eagle 认不出这个类型，就会用我们生成的缩略图当封面。
		// 只在「name + '.' + ext 就是磁盘上的真实文件名」时才改，避免覆盖用户自己改过的名字。
		const parts = utils.splitCompoundName(eagleItem.name + (eagleItem.ext ? '.' + eagleItem.ext : ''));
		if (parts && (eagleItem.name !== parts.name || eagleItem.ext !== parts.ext)) {
			try {
				eagleItem.name = parts.name;
				eagleItem.ext = parts.ext;
				await withTimeout(eagleItem.save(), 20000, t('thumb.fixSuffixAction', { label }));
				log(t('thumb.suffixFixed', { label, name: parts.name + '.' + parts.ext }), 'dim');
			} catch (error) {
				log(t('thumb.suffixFailed', { label, error: (error && error.message) || error }), 'warn');
			}
		}
		// 不覆盖用户已有的自定义缩略图（Eagle 审核要求避免静默覆盖用户数据）。
		if (eagleItem.customThumbnail === true) {
			stats.skipped += 1;
			countRun('skipped', false, item.entryName);
			log(t('thumb.existingThumbnail', { label }), 'dim');
			return;
		}
		const version = utils.detectVersion(item.skeletonPath);
		const runtimeDir = utils.chooseRuntimeDir(version, item.isBinary);
		// 动态缩略图要逐帧渲染再逐档试体积，比一张静帧慢得多，超时时间分开给。
		const animated = settings.mode !== 'static';
		const rendered = await withTimeout(renderThumbnailAuto({
			skeletonPath: item.skeletonPath,
			atlasPath: item.atlasPath,
			texturePaths: item.texturePaths,
			runtimeDir,
			isBinary: item.isBinary,
			version,
			size: 400,
			mode: settings.mode,
			strategy: settings.strategy,
			onProgress: (current, total) => {
				setStatus(t('thumb.statusRendering', { current, total, queued: queue.length }));
			},
		}), animated ? 300000 : 60000, t('thumb.renderAction', { label }));
		tempPath = path.join(os.tmpdir(), 'spine-thumb-' + itemId + '-' + Date.now() + (rendered.extension || '.png'));
		fs.writeFileSync(tempPath, rendered.buffer);
		const applied = await withTimeout(
			eagleItem.setCustomThumbnail(tempPath),
			20000,
			t('thumb.setThumbnailAction', { label: item.dirName }),
		);
		if (applied !== true) throw new Error(t('thumb.thumbnailRejected'));
		stats.generated += 1;
		countRun('generated', rendered.mode === 'animated', item.entryName);
		log(t('thumb.generated', { label, details: describeThumbnail(rendered), version }), 'ok');
	} catch (error) {
		stats.failed += 1;
		countRun('failed', false, item.entryName);
		log(t('thumb.generateFailed', { label, error: (error && error.message) || error }), 'fail');
	} finally {
		try { if (tempPath && fs.existsSync(tempPath)) fs.unlinkSync(tempPath); } catch (error) { /* ignore */ }
		refreshStats();
	}
}

/** 读弹窗写下的控制指令：{ action: 'pause' | 'resume' | 'cancel', at: 时间戳 }。 */
function readControl() {
	try {
		const data = JSON.parse(fs.readFileSync(CONTROL_FILE, 'utf8'));
		if (data && typeof data.action === 'string' && Number.isFinite(data.at)) return data;
	} catch (error) { /* 没有文件或内容不完整 */ }
	return null;
}

/** 执行弹窗按钮的意图：暂停、继续、取消（取消 = 丢掉剩下的队列，已生成的保留）。 */
function applyControl() {
	const control = readControl();
	if (!control || control.at === lastControlAt) return;
	lastControlAt = control.at;
	if (control.action === 'pause') {
		paused = true;
		setStatus(t('thumb.statusPaused'));
	} else if (control.action === 'resume') {
		paused = false;
	} else if (control.action === 'cancel') {
		paused = false;
		const dropped = queue.length;
		queue.length = 0;
		log(t('thumb.cancelled', {
			dropped,
			done: runStats ? runStats.done : 0,
			generated: runStats ? runStats.generated : 0,
			failed: runStats ? runStats.failed : 0,
			skipped: runStats ? runStats.skipped : 0,
		}), 'warn');
	}
}

/** 串行处理队列：一次只渲染一个，避免批量导入时把 Eagle 卡住。 */
async function processQueue() {
	if (running) return;
	running = true;
	// 一次队列排空算一轮，从零开始记；排空后再决定要不要弹通知。
	if (!runStats) {
		runStats = {
			startedAt: Date.now(),
			total: queue.length,
			done: 0,
			name: '',
			animated: 0,
			generated: 0,
			failed: 0,
			skipped: 0,
		};
	}
	paused = false;
	// 记下开跑那一刻控制文件的时间戳：上一轮遗留的暂停/取消指令不能再生效。
	const stale = readControl();
	lastControlAt = stale ? stale.at : 0;
	try {
		while (queue.length) {
			applyControl();
			if (paused) {
				await new Promise((resolve) => setTimeout(resolve, 300));
				continue;
			}
			const item = queue.shift();
			// 取消是在上面 applyControl 里生效的，队列可能刚好被清空。
			if (!item) break;
			setStatus(t('thumb.statusGenerating', { queued: queue.length }));
			await generateOne(item);
		}
		setStatus(t('thumb.statusListening'));
	} finally {
		running = false;
		paused = false;
		// 收尾放进 finally：哪怕中途出异常，进度弹窗也必须收到"本轮结束"，不能一直挂着。
		const run = runStats;
		const showsProgress = runShowsProgress;
		runStats = null;
		runShowsProgress = false;
		if (run && showsProgress) finishRun(run);
		cleanupStaleFiles(os.tmpdir(), 'spine-thumb-', STALE_TEMP_AGE_MS);
	}
}

/** 在这轮结束时把结果同时写进面板日志和进度弹窗。 */
function finishRun(run) {
	const seconds = Math.max(1, Math.round((Date.now() - run.startedAt) / 1000));
	const summary = t('thumb.runSummary', {
		generated: run.generated,
		failed: run.failed,
		skipped: run.skipped,
		seconds,
	});
	log(summary, 'ok');
	progress.finish(summary);
}

// 批次之间串行执行：配对大目录是同步重活，上一批没跑完就让下一批等着。
let batchChain = Promise.resolve();

function handleBatch(batch) {
	batchChain = batchChain
		.then(() => handleBatchAsync(batch))
		.catch((error) => log(t('thumb.batchFailed', { error: (error && error.message) || error }), 'error'));
}

/** 一批静默结束后触发：只分析本次新增的目录，避免每次全库扫描。 */
async function handleBatchAsync({ added, total, reason }) {
	// Eagle 后台写缩略图、写 metadata 也会让 images/ 产生目录事件，静默后同样走到这里。
	// 没有新增目录就等于什么都没发生：不计数、不写日志，否则「批次」会被噪音刷成几十上百。
	if (!added.length) return;
	// 每批都重读库的文件夹树：这批导入可能刚建了新文件夹，沿用上一批的 id 会全部查不到。
	loadFolderPaths();
	stats.batches += 1;
	stats.added += added.length;
	const reasonText = t(reason === 'fallback' ? 'thumb.reasonFallback' : 'thumb.reasonQuiet');
	log(t('thumb.batchFinished', { added: added.length, total, reason: reasonText }));
	// 本次新增 + 之前配套不全的，一起重新检查。
	const candidates = [...new Set([...added, ...pending])];
	if (pending.size) log(t('thumb.recheck', { count: pending.size }), 'dim');
	// 先把上面这行日志真正刷到屏幕上，再开始配对——配对是同步扫全库的重活，
	// 一旦开始浏览器就没机会重绘，日志会「迟到」到全部结束才一次性出现。
	setStatus(t('thumb.statusPairing'));
	await new Promise((resolve) => setTimeout(resolve, 0));
	const items = await scanSpineItems(imagesDir, candidates, utils, (current, all) => {
		setStatus(t('thumb.statusPairingProgress', { current, total: all }));
	});
	// 统计只算本次新增的：待观察的重查会重复计入，数字会虚高。
	const fresh = items.filter((item) => added.includes(item.dirName));
	stats.spine += fresh.length;
	stats.complete += fresh.filter((item) => item.complete).length;
	if (!items.length) log(t('thumb.noSpine'), 'dim');
	// 配套不全的先记下来，等下一批补齐时再处理；补齐了就从待观察里移除。
	const incomplete = items.filter((item) => !item.complete);
	pending.clear();
	// 「待观察」只在自动生成开着的时候记：关着的时候导入的素材属于"没赶上"，不该在
	// 开关重新打开后被回头处理——这个插件只对导入当时开着开关的素材生效。
	if (settings.enabled) {
		for (const item of incomplete) pending.add(item.dirName);
	}
	if (incomplete.length) {
		log(t(settings.enabled ? 'thumb.incompletePending' : 'thumb.incompleteIgnored', { count: incomplete.length }),
		settings.enabled ? 'warn' : 'dim');
	}
	for (const item of items) {
		const name = (filePath) => (filePath ? path.basename(filePath) : t('thumb.none'));
		log(t('thumb.itemSummary', {
			name: item.entryName,
			path: folderPathOf(item.folders),
			state: t(item.complete ? 'thumb.complete' : 'thumb.incomplete'),
			skeleton: name(item.skeletonPath),
			atlas: name(item.atlasPath),
			pages: item.pages,
			missing: item.missingTextures,
		}),
		item.complete ? 'ok' : 'warn');
	}
	refreshStats();

	const ready = items.filter((item) => item.complete);
	if (!ready.length) return;
	if (!settings.enabled) {
		log(t('thumb.autoSkipped', { count: ready.length }), 'warn');
		setStatus(t('thumb.statusAutoSkipped'));
		return;
	}
	queue.push(...ready);
	// 已经在跑的一轮又来新素材，把总数补上，进度条才不会一直显示满。
	if (runStats) runStats.total += ready.length;
	// 硬性条件：动态模式且这一次排队超过 10 个，才开进度弹窗，跑完在里面给汇总。
	if (settings.mode !== 'static' && ready.length > PROGRESS_MIN_DYNAMIC) {
		runShowsProgress = true;
		progress.open();
		progress.update({
			done: runStats ? runStats.done : 0,
			total: runStats ? runStats.total : queue.length,
		});
	}
	log(t('thumb.queued', {
		added: ready.length,
		queued: queue.length,
		state: running ? t('thumb.queuedRunning') : '',
	}), 'dim');
	processQueue();
}

const libraryWatcher = createLibraryWatcher({ onBatch: handleBatch, onLog: log, t });

async function resolveLibraryPath() {
	const direct = eagle.library && eagle.library.path;
	if (direct) return direct;
	try {
		const info = await eagle.library.info();
		const fromApi = info && (info.path || info.libraryPath || info.dir);
		if (fromApi) return fromApi;
		log(t('thumb.libraryInfoNoPath', { info: JSON.stringify(info) }), 'dim');
	} catch (error) {
		log(t('thumb.libraryInfoFailed', { error: (error && error.message) || error }), 'error');
	}
	return null;
}

async function start() {
	const resolved = await resolveLibraryPath();
	if (!resolved) {
		setStatus(t('thumb.statusNoLibrary'));
		return;
	}
	libraryPath = resolved;
	imagesDir = path.join(resolved, 'images');
	folderPaths = null; // 换库了，文件夹树重新读
	libraryEl.textContent = resolved;
	setStatus(libraryWatcher.start(resolved) ? t('thumb.statusListening') : t('thumb.statusListenFailed'));
}

function startSafely() {
	start().catch((error) => {
		setStatus(t('thumb.statusStartFailed', { error: (error && error.message) || error }));
		log(t('thumb.statusStartFailed', { error: (error && error.stack) || error }), 'error');
	});
}

async function loadSettings() {
	try {
		settings = await settingsStore.read();
	} catch (error) {
		log(t('thumb.settingsReadFailed', { error: (error && error.message) || error }), 'warn');
		settings = { ...settingsStore.DEFAULTS };
	}
	toggleEl.checked = settings.enabled === true;
	modeEl.value = settings.mode === 'static' ? 'static' : 'animated';
	strategyEl.value = settings.strategy === 'speed' ? 'speed' : 'size';
}

toggleEl.addEventListener('change', async () => {
	settings = { ...settings, enabled: toggleEl.checked };
	try {
		await settingsStore.write(settings);
	} catch (error) {
		log(t('thumb.settingsSaveFailed', { error: (error && error.message) || error }), 'warn');
	}
	if (settings.enabled) {
		log(t('thumb.autoEnabled'), 'ok');
		setStatus(t('thumb.statusListening'));
	} else {
		queue.length = 0;
		log(t('thumb.autoDisabled'), 'dim');
		setStatus(t('thumb.statusAutoOff'));
	}
});

// 只清显示，不动统计和 queue：Eagle 的 devtools 控制台里仍然留着完整历史。
clearEl.addEventListener('click', () => {
	logEl.textContent = '';
});

modeEl.addEventListener('change', async () => {
	settings = { ...settings, mode: modeEl.value === 'static' ? 'static' : 'animated' };
	try {
		await settingsStore.write(settings);
	} catch (error) {
		log(t('thumb.settingsSaveFailed', { error: (error && error.message) || error }), 'warn');
	}
	log(t(settings.mode === 'static' ? 'thumb.modeStaticLog' : 'thumb.modeAnimatedLog'), 'dim');
});

strategyEl.addEventListener('change', async () => {
	settings = { ...settings, strategy: strategyEl.value === 'speed' ? 'speed' : 'size' };
	try {
		await settingsStore.write(settings);
	} catch (error) {
		log(t('thumb.settingsSaveFailed', { error: (error && error.message) || error }), 'warn');
	}
	log(t(settings.strategy === 'speed' ? 'thumb.strategySpeedLog' : 'thumb.strategySizeLog'), 'dim');
});

// 日志分类过滤交给 CSS：这里只切 #log 的 data-filter 和按钮高亮。
filtersEl.addEventListener('click', (event) => {
	const button = event.target.closest('button[data-filter]');
	if (!button) return;
	logEl.dataset.filter = button.dataset.filter;
	for (const item of filtersEl.children) item.classList.toggle('active', item === button);
});

// 先确认脚本本身执行到了这里，再谈 Eagle 事件有没有来。
document.getElementById('status').textContent = t('thumb.statusLoaded', { version: VERSION });
cleanupStaleFiles(os.tmpdir(), 'spine-thumb-', STALE_TEMP_AGE_MS);

if (typeof eagle === 'undefined') {
	setStatus(t('thumb.statusEagleMissing'));
	log(t('thumb.statusEagleMissing'), 'error');
} else {
	eagle.onPluginCreate(async (plugin) => {
		// 官方文档：onPluginCreate 用来初始化插件所需的模块，plugin.path 就是插件所在目录。
		// app.getPath 这类 API 必须在这个事件之后才能调用，所以设置读取也放在这里。
		window.SpinePluginPath = (plugin && plugin.path) || window.SpinePluginRoot;
		if (i18n) i18n.setLocale(eagle.app && eagle.app.locale);
		logVersion();
		log(t('thumb.pluginCreated', {
			name: (plugin && plugin.manifest && plugin.manifest.name) || t('thumb.title'),
		}));
		try {
			await loadSettings();
		} catch (error) {
			log(t('thumb.settingsReadFailed', { error: (error && error.message) || error }), 'warn');
		}
		startSafely();
	});
	eagle.onLibraryChanged((changedPath) => {
		log(t('thumb.switchingLibrary', { path: changedPath }));
		startSafely();
	});
	// 兜底：service 插件可能在窗口打开前就已创建完，创建事件错过了就自己启动一次。
	setTimeout(() => {
		if (libraryEl.textContent === '—') {
			if (i18n) i18n.setLocale(i18n.requestedLocale());
			logVersion();
			log(t('thumb.noCreateEvent'), 'dim');
			loadSettings().catch(() => {}).then(startSafely);
		}
	}, 800);
}