// @vitest-environment jsdom
import { readFileSync } from 'node:fs';

import { describe, expect, test } from 'vitest';

import { repoPath } from './repoPath';
import {
  declaration,
  parseStyleSheet,
  resolveDeclarations,
  type StyleRule,
} from './styleCascade';

/**
 * 侧栏样式的声明级断言。
 *
 * jsdom 不加载这个 CSS 文件，所以这里按仓库既有做法（`styleCascade`）直接解析**真实生效的声明**：
 * 「状态 tone 映射」「等宽数字」「圆角 / 悬停」「过渡」「reduced-motion 关动效」都用声明钉住。
 */
const SIDEBAR_CSS_PATH = repoPath(
  'apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasAssetGenerationTasksSidebar.css',
);
const rules = parseStyleSheet(readFileSync(SIDEBAR_CSS_PATH, 'utf8'));

/**
 * 锚点在「资源栏目画布」那一档要让开的、钉死的栏目标题栏（`.game-resource-book-scene-titlebar`）。
 * 它的高度定义在全局样式表里，而让开多少写在侧栏样式里——两个文件，必须一起改，
 * 所以这里读真实声明把关系钉住。
 */
const GLOBAL_CSS_PATH = repoPath('apps/ai-game-creator-shell/src/styles.css');
const globalRules = parseStyleSheet(readFileSync(GLOBAL_CSS_PATH, 'utf8'));
// 同一个求值器限制：全局表里也有 `prefers-reduced-motion` 档，求值时先排除掉。
const globalWidthRules = globalRules.filter(
  (rule) => !(rule.media ?? '').includes('prefers-reduced-motion'),
);

/** 声明里允许的形状就这两种：单个长度，或「几个长度相加」的 `calc`（本文件不解析别的函数）。 */
function cssLengthToPx(value: string): number {
  const raw = value.trim();
  const calc = /^calc\((.+)\)$/u.exec(raw);
  if (calc) {
    return calc[1]
      .split('+')
      .map((term) => cssLengthToPx(term))
      .reduce((total, term) => total + term, 0);
  }
  const match = raw.match(/^(-?\d+(?:\.\d+)?)(px|rem)$/u);
  if (!match) {
    throw new Error(`不是可换算的长度：${value}`);
  }
  const [, amount, unit] = match;
  // 根字号取浏览器 / WebView 的默认 16px（全局样式表没有改写 `html` 的字号），
  // 这个换算只用在那条「让开多少 ≥ 标题栏多高」的守卫上。
  return Number(amount) * (unit === 'rem' ? 16 : 1);
}

/**
 * `styleCascade` 的求值器只认识宽度媒体查询，遇到 `prefers-reduced-motion` 会主动报错；
 * 那条规则的生效与否单独在下面按声明断言，所以求值时先把它排除掉。
 */
const widthRules = rules.filter(
  (rule) => !(rule.media ?? '').includes('prefers-reduced-motion'),
);

function resolved(
  selectors: readonly string[],
  viewportWidth = 1280,
): Map<string, string> {
  return resolveDeclarations(widthRules, selectors, viewportWidth);
}

function toneRule(tone: string): StyleRule | undefined {
  return rules.find((rule) =>
    rule.selectors.includes(
      `.game-resource-generation-task-badge[data-tone='${tone}']`,
    ),
  );
}

describe('「生成任务」侧栏样式', () => {
  test('四种状态各有一档 tone，取值全部来自平台 token 而不硬编码颜色', () => {
    const tones = ['queued', 'running', 'completed', 'failed'] as const;
    const resolvedTones = tones.map((tone) =>
      resolved([
        '.game-resource-generation-task-badge',
        `.game-resource-generation-task-badge[data-tone='${tone}']`,
      ]),
    );
    const signature = (map: Map<string, string>) =>
      ['border-color', 'background', 'color']
        .map((property) => declaration(map, property))
        .join(' | ');

    const signatures = resolvedTones.map(signature);
    // 四档必须互不相同，否则「状态徽标成体系」这条就退化成同一个样子。
    expect(new Set(signatures).size).toBe(4);
    expect(signatures[0]).toContain('--platform-neutral');
    expect(signatures[1]).toContain('--platform-accent');
    expect(signatures[2]).toContain('--platform-success');
    expect(signatures[3]).toContain('--platform-button-danger');
    for (const one of signatures) {
      expect(one).not.toMatch(/#[0-9a-f]{3,8}|rgba?\(|hsla?\(/iu);
    }
    // 四档 tone 必须在 CSS 里真实存在（少一档这条断言就红）。
    for (const tone of tones) {
      expect(toneRule(tone)).toBeDefined();
    }
  });

  test('生成中只有「在动」的呼吸感，没有伪造百分比', () => {
    const running = resolved([
      '.game-resource-generation-task-badge',
      ".game-resource-generation-task-badge[data-tone='running']",
    ]);
    // 徽标本身不承载进度数值：文案由组件按后端状态给，样式里不出现百分比工具。
    expect(declaration(running, 'color')).toBe('var(--platform-accent)');
    const pulse = rules.find((rule) =>
      rule.selectors.includes(
        ".game-resource-generation-task-badge[data-tone='running']::before",
      ),
    );
    expect(pulse?.declarations.get('animation')).toContain('pulse');
  });

  test('阶段是次要信息、已耗时等宽数字右对齐', () => {
    const phase = resolved(['.game-resource-generation-task-card-phase']);
    expect(declaration(phase, 'color')).toBe('var(--platform-text-muted)');
    expect(declaration(phase, 'font-size')).toBe('0.7rem');

    const elapsed = resolved(['.game-resource-generation-task-card-elapsed']);
    expect(declaration(elapsed, 'font-variant-numeric')).toBe('tabular-nums');
    expect(declaration(elapsed, 'text-align')).toBe('right');
  });

  test('条目卡片有圆角与悬停反馈，失败原因可折行不截断', () => {
    const card = resolved(['.game-resource-generation-task-card']);
    expect(declaration(card, 'border-radius')).toBe('0.5rem');

    const hover = resolved([
      '.game-resource-generation-task-card',
      '.game-resource-generation-task-card:hover',
    ]);
    expect(declaration(hover, 'box-shadow')).toBe(
      'var(--platform-desktop-hover-shadow)',
    );
    expect(declaration(hover, 'transform')).toBe('translateY(-1px)');

    const error = resolved(['.game-resource-generation-task-card-error']);
    expect(declaration(error, 'white-space')).toBe('normal');
    expect(declaration(error, 'overflow-wrap')).toBe('anywhere');

    const locate = resolved(['.game-resource-generation-task-locate']);
    expect(declaration(locate, 'text-decoration')).toContain('underline');
  });

  test('进场动画留在侧栏上，删除的折叠把手不再有样式残留', () => {
    const sidebar = resolved(['.game-resource-generation-tasks-sidebar']);
    expect(declaration(sidebar, 'animation')).toContain(
      'game-resource-generation-tasks-enter',
    );
    expect(declaration(sidebar, 'border-radius')).toBe('0.75rem');
    expect(declaration(sidebar, 'backdrop-filter')).toBe('blur(10px)');

    // 折叠把手与底部关闭条都已删除：对应类名不得再出现在样式表里。
    for (const removed of [
      '.game-resource-generation-tasks-handle',
      '.game-resource-generation-tasks-handle-label',
      '.game-resource-generation-tasks-handle-badge',
      '.game-resource-generation-tasks-sidebar-footer',
    ]) {
      expect(rules.some((rule) => rule.selectors.includes(removed))).toBe(
        false,
      );
    }
  });

  test('收起与进场同源反向：is-leaving 挂上收起动画，减动效下同样关掉', () => {
    const leaving = resolved([
      '.game-resource-generation-tasks-sidebar',
      '.game-resource-generation-tasks-sidebar.is-leaving',
    ]);
    const animation = declaration(leaving, 'animation');
    expect(animation).toContain('game-resource-generation-tasks-leave');
    expect(animation).toContain('160ms');
    // 动画期间不该还能点到里面（此刻它在播退场，点它只会在卸载前留下半截状态）。
    expect(declaration(leaving, 'pointer-events')).toBe('none');
    expect(
      rules.some((rule) =>
        rule.selectors.includes(
          '.game-resource-generation-tasks-sidebar.is-leaving',
        ),
      ),
    ).toBe(true);

    // 减少动效：收起动画同样关掉，组件那边会立即卸载，不白等 160ms。
    const reduced = rules.filter((rule) =>
      (rule.media ?? '').includes('prefers-reduced-motion'),
    );
    expect(
      reduced.some(
        (rule) =>
          rule.selectors.includes(
            '.game-resource-generation-tasks-sidebar.is-leaving',
          ) && rule.declarations.get('animation') === 'none',
      ),
    ).toBe(true);
  });

  test('列表滚动条是细样式，滚动区域有界', () => {
    const scroll = resolved(['.game-resource-generation-tasks-scroll']);
    expect(declaration(scroll, 'overflow-y')).toBe('auto');
    expect(declaration(scroll, 'scrollbar-width')).toBe('thin');
    expect(declaration(scroll, 'overscroll-behavior')).toBe('contain');
    const thumb = rules.find((rule) =>
      rule.selectors.includes(
        '.game-resource-generation-tasks-scroll::-webkit-scrollbar-thumb',
      ),
    );
    expect(thumb?.declarations.get('background')).toBe(
      'var(--platform-line-soft)',
    );

    // 面板高度有界：不再靠上下边界拉满，改成锚点里的浮动卡片 + 封顶高度（内容再多也只滚列表）。
    const sidebar = resolved(['.game-resource-generation-tasks-sidebar']);
    expect(declaration(sidebar, 'width')).toBe('min(300px, 80vw)');
    expect(declaration(sidebar, 'max-height')).toBe(
      'min(30rem, calc(100vh - 12rem))',
    );
    // 面板自己不再定位：坐标只由右上角锚点一处决定，避免两处各锚一处互相漂移。
    expect(sidebar.has('position')).toBe(false);
    expect(sidebar.has('left')).toBe(false);
  });

  test('锚点贴在工作面右上角，运行表现层不挂这一档，开关沿用次级胶囊样式', () => {
    const anchor = resolved(['.game-resource-generation-tasks-anchor']);
    // 锚点是 stage 网格里与工作面同一个单元格的条目：贴右贴顶由网格给，不再用写死 top 的绝对定位
    //（写死的 top 会被工具条换行顶穿，验收现场那条「生成任务和菜单栏重叠」就是这么来的）。
    expect(anchor.has('position')).toBe(false);
    expect(declaration(anchor, 'grid-row')).toBe('3');
    expect(declaration(anchor, 'grid-column')).toBe('1');
    expect(declaration(anchor, 'justify-self')).toBe('end');
    expect(declaration(anchor, 'align-self')).toBe('start');
    expect(declaration(anchor, 'z-index')).toBe('40');
    // 画布顶边内缩一小段，不压在工具条那一行上。
    expect(declaration(anchor, 'margin')).toBe('0.85rem');

    // 运行表现层不再挂这个锚点（运行页要留给游戏画面，见 `project-development/index.tsx`）：
    // 「让开右上角版本入口」那一档坐标随之退役，留一条死规则在这里只会误导下一次改动。
    expect(
      widthRules.some((rule) =>
        rule.selectors.includes(
          ".game-resource-generation-tasks-anchor[data-generation-tasks-placement='run']",
        ),
      ),
    ).toBe(false);

    // UI 编辑器那一档与资源画布同档（第二行），不引入第三套坐标。
    const editorAnchor = resolved([
      '.game-resource-generation-tasks-anchor',
      ".game-resource-generation-tasks-anchor[data-generation-tasks-placement='editor']",
    ]);
    expect(declaration(editorAnchor, 'grid-row')).toBe('2');
    expect(declaration(editorAnchor, 'margin')).toBe('0.85rem');

    /*
     * 资源总览页与资源栏目画布页的**锚点高度不同**：画布页顶部钉着整宽的栏目标题栏
     * （右端就是「返回资源总览」入口），锚点必须让开它，否则那枚开关会压在标题栏上
     * （验收现场那条「生成任务和标题栏重叠」）。让开的高度与标题栏真实高度是跨文件关系，
     * 所以这里读全局样式表里的 min-height 断言「让开得比它高」。
     */
    const titlebarMinHeight = cssLengthToPx(
      declaration(
        resolveDeclarations(globalWidthRules, [
          '.game-resource-book-scene-titlebar',
        ]),
        'min-height',
      ),
    );
    const canvasAnchor = resolved([
      '.game-resource-generation-tasks-anchor',
      ".game-resource-generation-tasks-anchor[data-generation-tasks-placement='canvas']",
    ]);
    const canvasAnchorTop = cssLengthToPx(
      declaration(canvasAnchor, 'margin-top'),
    );
    expect(canvasAnchorTop).toBeGreaterThan(titlebarMinHeight);

    const overviewAnchor = resolved([
      '.game-resource-generation-tasks-anchor',
      ".game-resource-generation-tasks-anchor[data-generation-tasks-placement='canvas-overview']",
    ]);
    const overviewAnchorTop = cssLengthToPx(
      declaration(overviewAnchor, 'margin-top'),
    );
    // 总览页没有那条标题栏：仍贴画布顶边内缩，而且确实比画布页高一档。
    expect(overviewAnchorTop).toBe(cssLengthToPx('0.85rem'));
    expect(overviewAnchorTop).toBeLessThan(canvasAnchorTop);

    // 开关保留原来工具条那一枚的外观（次级胶囊），只是搬到画布上并加一档面板投影；
    // 取值仍然全部走平台 token，不引入第二套色板。
    const toggle = resolved(['.game-resource-generation-tasks-toggle']);
    expect(declaration(toggle, 'border-radius')).toBe('999px');
    expect(declaration(toggle, 'border')).toBe(
      '1px solid var(--platform-surface-border)',
    );
    expect(declaration(toggle, 'background')).toBe(
      'var(--platform-button-secondary-fill)',
    );
    expect(declaration(toggle, 'color')).toBe(
      'var(--platform-button-secondary-text)',
    );
    expect(declaration(toggle, 'box-shadow')).toBe(
      'var(--platform-panel-shadow)',
    );
    for (const property of ['border', 'background', 'color', 'box-shadow']) {
      expect(declaration(toggle, property)).not.toMatch(
        /#[0-9a-f]{3,8}|rgba?\(|hsla?\(/iu,
      );
    }
  });

  test('窄屏（360px）下锚点拉满画布那一格，面板宽度自适应不溢出', () => {
    const narrowAnchor = resolved(
      ['.game-resource-generation-tasks-anchor'],
      360,
    );
    expect(declaration(narrowAnchor, 'justify-self')).toBe('stretch');
    expect(declaration(narrowAnchor, 'margin')).toBe('0.5rem');

    const narrowSidebar = resolved(
      ['.game-resource-generation-tasks-sidebar'],
      360,
    );
    expect(declaration(narrowSidebar, 'width')).toBe('auto');
  });

  test('prefers-reduced-motion 下进场动画与过渡都被关掉', () => {
    const reduced = rules.filter((rule) =>
      (rule.media ?? '').includes('prefers-reduced-motion'),
    );
    expect(reduced.length).toBeGreaterThan(0);
    const motionless = (selector: string, property: string) =>
      reduced.some(
        (rule) =>
          rule.selectors.includes(selector) &&
          rule.declarations.get(property) === 'none',
      );
    expect(
      motionless('.game-resource-generation-tasks-sidebar', 'animation'),
    ).toBe(true);
    expect(
      motionless('.game-resource-generation-task-card', 'transition'),
    ).toBe(true);
  });

  test('资源总览 ↔ 资源画布切换时锚点高度有过渡，减动效下关掉', () => {
    const anchor = resolved(['.game-resource-generation-tasks-anchor']);
    expect(declaration(anchor, 'transition')).toContain('margin-top');

    const reduced = rules.filter((rule) =>
      (rule.media ?? '').includes('prefers-reduced-motion'),
    );
    expect(
      reduced.some(
        (rule) =>
          rule.selectors.includes('.game-resource-generation-tasks-anchor') &&
          rule.declarations.get('transition') === 'none',
      ),
    ).toBe(true);
  });

  test('焦点环可见（键盘可见焦点用平台 token）', () => {
    const focusRule = rules.find((rule) =>
      rule.selectors.includes(
        '.game-resource-generation-tasks-sidebar-icon-button:focus-visible',
      ),
    );
    expect(focusRule?.declarations.get('outline')).toBe(
      '2px solid var(--platform-accent)',
    );
    expect(focusRule?.declarations.get('box-shadow')).toBe(
      '0 0 0 3px var(--platform-input-focus-ring)',
    );
  });
});