'use strict';

const assert = require('node:assert/strict');
const fs = require('node:fs');
const vm = require('node:vm');
const { encode } = require('../js/apng-encoder');
const { encode: encodeWebp } = require('../js/animated-webp-encoder');
const profilesModule = require('../js/animated-profiles');

function chunks(buffer) {
	const result = [];
	let offset = 8;
	while (offset < buffer.length) {
		const length = buffer.readUInt32BE(offset);
		const type = buffer.toString('ascii', offset + 4, offset + 8);
		result.push({ type, data: buffer.subarray(offset + 8, offset + 8 + length) });
		offset += length + 12;
	}
	return result;
}

const red = new Uint8Array(16);
const blue = new Uint8Array(16);
for (let index = 0; index < 16; index += 4) {
	red.set([255, 0, 0, 255], index);
	blue.set([0, 0, 255, 255], index);
}
const png = encode({
	width: 2,
	height: 2,
	frames: [
		{ rgba: red, delayNumerator: 125, delayDenominator: 1000 },
		{ rgba: blue, delayNumerator: 125, delayDenominator: 1000 },
	],
});
assert.deepEqual([...png.subarray(0, 8)], [137, 80, 78, 71, 13, 10, 26, 10]);
const parsed = chunks(png);
assert.deepEqual(parsed.map((entry) => entry.type), ['IHDR', 'acTL', 'fcTL', 'IDAT', 'fcTL', 'fdAT', 'IEND']);
assert.equal(parsed.find((entry) => entry.type === 'acTL').data.readUInt32BE(0), 2);
assert.equal(parsed[2].data.readUInt32BE(0), 0);
assert.equal(parsed[4].data.readUInt32BE(0), 1);
assert.equal(parsed[5].data.readUInt32BE(0), 2);

// WebP 帧必须是 { webp, duration } 结构：直接塞 Buffer 会让编码器读到 undefined 后报错。
assert.throws(
	() => encodeWebp({ width: 2, height: 2, plays: 0, frames: [Buffer.alloc(4), Buffer.alloc(4)] }),
	/WebP 帧数据缺失/,
);

// 档位表是可以自由增删的配置：只校验结构约束，不锁死具体数值，
// 否则每次调档位都要连着改测试。
const priorities = profilesModule.ANIMATED_PRIORITIES;
assert.ok(priorities[profilesModule.DEFAULT_PRIORITY], '默认优先级必须存在于配置里');
for (const [name, plan] of Object.entries(priorities)) {
	assert.ok(Array.isArray(plan) && plan.length >= 2, name + ' 至少要有两档');
	for (const item of plan) {
		assert.ok(Array.isArray(item) && item.length === 3, name + ' 每项必须是 [细节分辨率, 帧率, 质量]');
		const [detailSize, fps, quality] = item;
		assert.ok(Number.isInteger(detailSize) && detailSize > 0 && detailSize <= 400, name + ' 细节分辨率必须是 1-400 的整数');
		assert.ok(Number.isFinite(fps) && fps > 0, name + ' 帧率必须是正数');
		assert.ok(quality > 0 && quality <= 1, name + ' 编码质量必须落在 (0,1] 内');
	}
	const list = profilesModule.animatedProfiles(name);
	assert.equal(list.length, plan.length, name + ' 档位数必须跟随配置长度');
	list.forEach((profile, index) => {
		assert.equal(profile.size, plan[index][0], name + ' 第 ' + (index + 1) + ' 档分辨率');
		assert.equal(profile.fps, plan[index][1], name + ' 第 ' + (index + 1) + ' 档帧率');
		assert.equal(profile.quality, plan[index][2], name + ' 第 ' + (index + 1) + ' 档质量');
	});
}
// 未知优先级回落到默认档位表，不能抛错。
assert.deepEqual(
	profilesModule.animatedProfiles('unknown'),
	profilesModule.animatedProfiles(profilesModule.DEFAULT_PRIORITY),
);

for (const root of ['.', 'release/UNIVERSAL_SpineViewer']) {
	const html = fs.readFileSync(root + '/viewer/spine.html', 'utf8');
	const css = fs.readFileSync(root + '/viewer/spine.css', 'utf8');
	const script = html.match(/<script>([\s\S]*?)<\/script>/)[1];
	new vm.Script(script);
	assert.match(script, /addEventListener\('contextmenu'[\s\S]*generateAnimatedThumbnail\(\)/);
	assert.match(script, /groupThumbBtn'[\s\S]*addEventListener\('contextmenu'[\s\S]*generateGroupThumbnails\(true\)/);
	assert.match(script, /async function generateGroupThumbnails\(animated = false\)/);
	assert.match(script, /if \(animated[\s\S]*renderAnimatedSourceFrames\(animation, options\)[\s\S]*pickAnimatedThumbnail\(source\.sourceFrames, source\.size, source\.range, options\)[\s\S]*renderCurrentFrameThumbnail\(\)/);
	assert.match(script, /const size = 400;/, 'animated output must remain fixed at 400x400');
	assert.match(script, /async function renderAnimatedSourceFrames\(animation, options\)/);
	assert.match(script, /async function pickAnimatedThumbnail\(sourceFrames, size, range, options\)/);
	assert.match(script, /const targetBytes = options\.maxKilobytes \* 1024/);
	// 档位表来自独立配置文件，三种优先级都走画廊手动挑，不会自动应用。
	assert.match(script, /require\('\.\.\/js\/animated-profiles\.js'\)/);
	assert.match(script, /const profiles = animatedProfiles\(options\.priority\)/);
	assert.match(html, /id="animatedThumbPriority"/);
	assert.match(script, /priorityInput\.value = animatedProfileConfig\.DEFAULT_PRIORITY/);
	assert.match(script, /priority: priorityInput\.value/);
	assert.match(script, /resizeFramePixels\(resizeFramePixels\(data, size, detailSize\), detailSize, size\)/);
	assert.match(script, /apngEncoder\.encode\(\{ width: size, height: size/);
	assert.match(script, /frames\.push\(\{ webp, duration \}\)/);
	// 每档生成完立刻填卡片，生成中可取消。
	assert.match(script, /addCard\(candidate\)/);
	assert.match(script, /if \(settled\) return;/);
	assert.match(script, /URL\.revokeObjectURL\(url\)/);
	assert.match(script, /candidate\.detail \+ '\*' \+ candidate\.detail \+ '@' \+ candidate\.fps \+ 'fps\/' \+ quality/);
	assert.match(script, /t\('viewer\.animatedCannotFit', \{ target: options\.maxKilobytes, actual: Math\.ceil\(smallest \/ 1024\) \}\)/);
	assert.doesNotMatch(script, /throw new Error\(t\('viewer\.animatedCannotFit'/);
	assert.match(script, /require\('\.\.\/js\/animated-webp-encoder\.js'\)/);
	assert.match(script, /require\('\.\.\/js\/spine-visible-bounds\.js'\)/);
	assert.match(script, /async function measureVisibleBounds/);
	assert.match(script, /const bounds = await measureVisibleBounds\(skeleton, geometryBounds, 1/);
	assert.match(script, /measureVisibleBounds\(previewSkeleton, bounds, sampleTimes\.length/);
	// 帧编码必须走异步 toBlob，否则同步 toDataURL 会把界面卡住。
	assert.match(script, /const pool = Array\.from\(\{ length: 4 \}/);
	assert.match(script, /Promise\.all\(batch\.map/);
	assert.match(script, /unit\.canvas\.toBlob\(\(blob\) => \{/);
	assert.match(script, /\}, 'image\/webp', quality\);/);
	assert.doesNotMatch(script, /toDataURL\('image\/webp',\s*profile\.quality\)/);
	assert.match(script, /const extension = options\.format === 'apng' \? '\.png' : '\.webp'/);
	assert.match(script, /for \(let alpha = 3; alpha < rgba\.length; alpha \+= 4\) rgba\[alpha\] = 255/);
	assert.match(script, /const totalFrames = Math\.max\(1, frameOf\(animationLength\)\)/);
	assert.match(script, /start: startFrame \/ FPS/);
	assert.match(html, /id="animatedThumbStart" type="number" min="0" step="1"/);
	assert.match(html, /id="animatedThumbEnd" type="number" min="0" step="1"/);
	assert.match(html, /data-i18n="viewer\.framesUnit"/);
	assert.match(html, /id="animatedThumbMaxSize" type="number" min="10" max="1024" step="10" value="30"/);
	assert.match(html, /class="animated-thumb-danger" data-i18n="viewer\.animatedThumbnailDanger"/);
	assert.match(html, /class="animated-thumb-warning-title" data-i18n="viewer\.animatedThumbnailAttention"/);
	assert.match(css, /\.animated-thumb-warning-title \{ display: block; \}/);
	assert.match(script, /maxSizeInput\.value = '30'/);
	assert.match(script, /maxKilobytes < 10 \|\| maxKilobytes > 1024/);
	assert.doesNotMatch(script, /startInput\.(?:focus|select)\(\)/);
	assert.match(script, /document\.activeElement\.blur\(\)/);
	assert.doesNotMatch(html, /id="animatedThumbQuality"/);
	assert.doesNotMatch(html, /viewer\.secondsUnit/);
	assert.match(html, /id="animatedThumbDialog"/);
	assert.match(html, /id="animatedPickDialog"/);
	assert.match(html, /id="animatedPickGrid"/);
	assert.match(css, /grid-template-columns: repeat\(5, minmax\(0, 1fr\)\)/);
	// 选中用绿色对勾，不能用半透明蒙版把缩略图压暗；确认按钮负责真正替换。
	assert.match(html, /id="animatedPickConfirm"[^>]*disabled/);
	assert.match(css, /\.animated-pick-item\.selected::after \{/);
	assert.match(css, /\.animated-pick-notice \{ color: var\(--text\); text-align: center;/);
	assert.match(css, /\.animated-pick-card \.thumb-dialog-note \{[^}]*text-align: center/);
	assert.doesNotMatch(css, /\.animated-pick-item\.over/);
	assert.match(script, /const confirm = \(\) => \{ if \(selected\) close\(selected\); \}/);
	// 用户没挑过时默认选中体积最小的一档，挑过之后就不再自动改。
	assert.match(script, /if \(!userPicked && \(!defaultPick \|\| buffer\.length < defaultPick\.buffer\.length\)\)/);
	assert.match(script, /item\.addEventListener\('click', \(\) => select\(candidate, true\)\)/);
	assert.match(html, /id="animatedThumbDialogTitle"[^>]*>生成动态缩略图<\/div>/);
	assert.match(css, /\.animated-thumb-card \.thumb-dialog-title \{ text-align: center; \}/);
	assert.match(html, /id="animatedThumbFormat"><option value="webp">AWebP \(\.webp\)<\/option><option value="apng">APNG \(\.png\)<\/option>/);
	assert.match(css, /\.animated-thumb-form \{[^}]*grid-template-columns: 96px minmax\(0, 1fr\)/);
	assert.match(css, /\.animated-thumb-form input\[type="number"\]/);
}

console.log('PASS: APNG structure, compact dialog, size fallback and single/group right-click wiring');