// packages/embed-loader/src/params.test.js
// 纯函数单测：data-* 解析/缺省回退/夹取、显式覆盖表（缺省 ≠ 覆盖）、窄屏强制、
// URL 拼接、高度夹取、后台设置归一/合并优先级、config 消息裁决、消息类型白名单。
// DOM/宿主交互行为由 Playwright 宿主页覆盖（计划注明 node 模拟 DOM 太薄）。
import { describe, expect, it } from 'vitest';
import {
  MESSAGE_TYPES,
  buildEmbedUrl,
  buildEmbedUrlV2,
  clampHeight,
  mergeBackendConfig,
  mergeBackendConfigV2,
  normalizeBackendSettings,
  normalizeBackendSettingsV2,
  normalizeInterval,
  parseConfigMessage,
  parseConfigMessageV2,
  parseEmbedConfig,
  parseEmbedConfigV2,
  SIZE_WIDTH,
} from './params.js';

describe('parseEmbedConfig', () => {
  it('空 dataset 全缺省（slot null → 调用方 no-op）+ UI-01 新字段默认', () => {
    const c = parseEmbedConfig({});
    expect(c).toEqual({
      slot: null,
      lang: 'auto',
      position: 'right',
      intervalMs: 5000,
      size: 'md',
      collapsedDefault: false,
      imageFit: 'contain',
      offsetX: 16,
      offsetBottom: 24,
      zIndex: 1000,
      pollMs: null,
      narrow: false,
      explicit: {
        lang: false,
        position: false,
        interval: false,
        size: false,
        imageFit: false,
        offsetX: false,
        offsetBottom: false,
        zIndex: false,
      },
    });
  });

  it('data-slot 保留并去首尾空白；非字符串（缺失）为 null', () => {
    expect(parseEmbedConfig({ slot: ' tok ' }).slot).toBe('tok');
    expect(parseEmbedConfig({}).slot).toBeNull();
    expect(parseEmbedConfig({ slot: '   ' }).slot).toBeNull();
  });

  it('lang/position/imageFit 白名单外静默回退缺省', () => {
    expect(parseEmbedConfig({ slot: 'a', lang: 'zh-CN' }).lang).toBe('zh-CN');
    expect(parseEmbedConfig({ slot: 'a', lang: 'en' }).lang).toBe('en');
    expect(parseEmbedConfig({ slot: 'a', lang: 'fr' }).lang).toBe('auto');
    expect(parseEmbedConfig({ slot: 'a', position: 'left' }).position).toBe('left');
    expect(parseEmbedConfig({ slot: 'a', position: 'top' }).position).toBe('right');
    expect(parseEmbedConfig({ slot: 'a', imageFit: 'cover' }).imageFit).toBe('cover');
    expect(parseEmbedConfig({ slot: 'a', imageFit: 'fill' }).imageFit).toBe('contain');
    expect(parseEmbedConfig({ slot: 'a', imageFit: 'cover' }).explicit.imageFit).toBe(true);
  });

  it('interval 解析失败取缺省、越界夹取到 [3000, 30000]', () => {
    expect(normalizeInterval('8000')).toBe(8000);
    expect(normalizeInterval('100')).toBe(3000);
    expect(normalizeInterval('999999')).toBe(30000);
    expect(normalizeInterval('abc')).toBe(5000);
    expect(normalizeInterval(undefined)).toBe(5000);
    expect(parseEmbedConfig({ slot: 'a', interval: '2500' }).intervalMs).toBe(3000);
  });

  it('offsetX/offsetBottom/zIndex 数值夹取到契约范围，非法回退缺省', () => {
    expect(parseEmbedConfig({ slot: 'a', offsetX: '200' }).offsetX).toBe(120);
    expect(parseEmbedConfig({ slot: 'a', offsetX: '-5' }).offsetX).toBe(0);
    expect(parseEmbedConfig({ slot: 'a', offsetX: '64' }).offsetX).toBe(64);
    expect(parseEmbedConfig({ slot: 'a', offsetBottom: '999' }).offsetBottom).toBe(240);
    expect(parseEmbedConfig({ slot: 'a', offsetBottom: 'abc' }).offsetBottom).toBe(24);
    expect(parseEmbedConfig({ slot: 'a', zIndex: '99999999999' }).zIndex).toBe(2147483000);
    expect(parseEmbedConfig({ slot: 'a', zIndex: '0' }).zIndex).toBe(1);
    expect(parseEmbedConfig({ slot: 'a', zIndex: '3000' }).zIndex).toBe(3000);
  });

  it('窄屏（<480px）：强制 sm 尺寸 + 默认收起，覆盖 dataset 尺寸语义', () => {
    const c = parseEmbedConfig({ slot: 'a', size: 'md' }, { narrow: true });
    expect(c.size).toBe('sm');
    expect(c.narrow).toBe(true);
    expect(c.explicit.size).toBe(false);
  });

  it('md 尺寸宽 320（UI-01 §5.1 视觉变更），sm 280', () => {
    expect(SIZE_WIDTH.md).toBe(320);
    expect(SIZE_WIDTH.sm).toBe(280);
  });
});

describe('explicit 覆盖表（缺省 ≠ 显式覆盖）', () => {
  it('仅真正提供的字段进 explicit（空串视为缺省）', () => {
    const c = parseEmbedConfig({ slot: 'a', offsetX: '40', lang: '', imageFit: 'cover' });
    expect(c.explicit.offsetX).toBe(true);
    expect(c.explicit.imageFit).toBe(true);
    expect(c.explicit.lang).toBe(false);
    expect(c.explicit.interval).toBe(false);
  });
});

describe('normalizeBackendSettings（iframe config 消息 / 公开端 settings）', () => {
  it('合法输入原样通过', () => {
    expect(
      normalizeBackendSettings({
        position: 'left',
        size: 'sm',
        intervalMs: 8000,
        lang: 'en',
        collapsedDefault: true,
        imageFit: 'cover',
        offsetX: 40,
        offsetBottom: 80,
        zIndex: 2000,
      }),
    ).toEqual({
      position: 'left',
      size: 'sm',
      intervalMs: 8000,
      lang: 'en',
      collapsedDefault: true,
      imageFit: 'cover',
      offsetX: 40,
      offsetBottom: 80,
      zIndex: 2000,
    });
  });

  it('非法值逐字段回退缺省（枚举/布尔/数值夹取）', () => {
    expect(
      normalizeBackendSettings({
        position: 'top',
        size: 'xl',
        intervalMs: 'x',
        lang: 1,
        collapsedDefault: 'yes',
        imageFit: null,
        offsetX: 999,
        offsetBottom: -1,
        zIndex: 0,
      }),
    ).toEqual({
      position: 'right',
      size: 'md',
      intervalMs: 5000,
      lang: 'auto',
      collapsedDefault: false,
      imageFit: 'contain',
      offsetX: 120,
      offsetBottom: 0,
      zIndex: 1,
    });
  });

  it('非对象输入返回 null（整体忽略）', () => {
    expect(normalizeBackendSettings(null)).toBeNull();
    expect(normalizeBackendSettings('x')).toBeNull();
    expect(normalizeBackendSettings(undefined)).toBeNull();
  });
});

describe('mergeBackendConfig（优先级：data-* 显式 > 后台 > 默认）', () => {
  const backend = {
    position: 'left',
    size: 'sm',
    intervalMs: 9000,
    lang: 'en',
    collapsedDefault: true,
    imageFit: 'cover',
    offsetX: 48,
    offsetBottom: 96,
    zIndex: 2500,
  };

  it('未显式覆盖的字段采用后台值', () => {
    const c = mergeBackendConfig(parseEmbedConfig({ slot: 'a' }), backend);
    expect(c.position).toBe('left');
    expect(c.intervalMs).toBe(9000);
    expect(c.imageFit).toBe('cover');
    expect(c.offsetX).toBe(48);
    expect(c.offsetBottom).toBe(96);
    expect(c.zIndex).toBe(2500);
    expect(c.collapsedDefault).toBe(true);
  });

  it('data-* 显式覆盖的字段不被后台刷新冲掉', () => {
    const c = mergeBackendConfig(
      parseEmbedConfig({ slot: 'a', position: 'right', offsetX: '10', imageFit: 'contain' }),
      backend,
    );
    expect(c.position).toBe('right');
    expect(c.offsetX).toBe(10);
    expect(c.imageFit).toBe('contain');
    expect(c.intervalMs).toBe(9000); // 未显式 → 后台
  });

  it('后台缺字段/非法 → 契约默认（旧投影行兼容）', () => {
    const c = mergeBackendConfig(parseEmbedConfig({ slot: 'a' }), { position: 'left' });
    expect(c.imageFit).toBe('contain');
    expect(c.offsetX).toBe(16);
    expect(c.zIndex).toBe(1000);
    expect(c.collapsedDefault).toBe(false);
  });

  it('后台非法输入 → 返回原配置（忽略整条消息）', () => {
    const base = parseEmbedConfig({ slot: 'a', offsetX: '10' });
    expect(mergeBackendConfig(base, null)).toBe(base);
  });

  it('窄屏强制优先于后台：size 恒 sm、collapsedDefault 恒 true', () => {
    const c = mergeBackendConfig(parseEmbedConfig({ slot: 'a' }, { narrow: true }), {
      ...backend,
      size: 'md',
      collapsedDefault: false,
    });
    expect(c.size).toBe('sm');
    expect(c.collapsedDefault).toBe(true);
  });
});

describe('parseConfigMessage（版本闸 + 校验）', () => {
  const settings = {
    position: 'right',
    size: 'md',
    intervalMs: 5000,
    lang: 'auto',
    collapsedDefault: false,
    imageFit: 'contain',
    offsetX: 16,
    offsetBottom: 24,
    zIndex: 1000,
  };

  it('高版本 + 合法 settings → 归一结果', () => {
    const r = parseConfigMessage({ photoliveEmbed: true, type: 'config', configVersion: 3, settings }, 1);
    expect(r).toEqual({ configVersion: 3, settings });
  });

  it('版本不高（旧请求/等值）→ null（旧配置不得覆盖新配置）', () => {
    expect(parseConfigMessage({ configVersion: 1, settings }, 1)).toBeNull();
    expect(parseConfigMessage({ configVersion: 2, settings }, 5)).toBeNull();
  });

  it('首条消息（当前版本 0/null）接受', () => {
    expect(parseConfigMessage({ configVersion: 1, settings }, 0)).not.toBeNull();
    expect(parseConfigMessage({ configVersion: 1, settings }, null)).not.toBeNull();
  });

  it('形状非法（缺版本/缺 settings/非对象）→ null', () => {
    expect(parseConfigMessage({ settings }, 0)).toBeNull();
    expect(parseConfigMessage({ configVersion: 2 }, 0)).toBeNull();
    expect(parseConfigMessage(null, 0)).toBeNull();
    expect(parseConfigMessage('x', 0)).toBeNull();
  });
});

describe('buildEmbedUrl', () => {
  it('显式字段拼接 interval/fit；缺省不拼（后台设置经 iframe 响应生效）', () => {
    const explicit = parseEmbedConfig({ slot: 'a', interval: '7000', imageFit: 'cover' });
    expect(buildEmbedUrl('https://ov.example.com', 'tok', explicit)).toBe(
      'https://ov.example.com/embed/tok?lang=auto&pos=right&interval=7000&fit=cover',
    );
    const bare = parseEmbedConfig({ slot: 'a' });
    expect(buildEmbedUrl('https://ov.example.com', 'tok', bare)).toBe(
      'https://ov.example.com/embed/tok?lang=auto&pos=right',
    );
  });

  it('poll 显式时透传（dev/e2e 加速；生产构建忽略）', () => {
    const c = parseEmbedConfig({ slot: 'a', poll: '2000' });
    expect(buildEmbedUrl('https://ov.example.com', 'tok', c)).toContain('&poll=2000');
  });

  it('slot token 编码（防路径注入）', () => {
    const url = buildEmbedUrl('https://ov.example.com', 'a/b?c=1', parseEmbedConfig({ slot: 'a/b?c=1' }));
    expect(url.startsWith('https://ov.example.com/embed/a%2Fb%3Fc%3D1?')).toBe(true);
    expect(url).toContain('lang=auto&pos=right');
  });
});

describe('MESSAGE_TYPES（消息类型白名单）', () => {
  it('resize/collapse/expand/config/destroy 全集', () => {
    expect([...MESSAGE_TYPES].sort()).toEqual(['collapse', 'config', 'destroy', 'expand', 'resize'].sort());
  });
});

describe('clampHeight', () => {
  it('正常值原样（取整）返回', () => {
    expect(clampHeight(200)).toBe(200);
    expect(clampHeight(200.6)).toBe(201);
  });

  it('夹取到 [60, 640]', () => {
    expect(clampHeight(10)).toBe(60);
    expect(clampHeight(9999)).toBe(640);
  });

  it('缺失/非数值返回 null（忽略该消息）', () => {
    expect(clampHeight(null)).toBeNull();
    expect(clampHeight(undefined)).toBeNull();
    expect(clampHeight('abc')).toBeNull();
    expect(clampHeight(NaN)).toBeNull();
    expect(clampHeight(Infinity)).toBeNull();
  });
});

// ── UI-04 v2（vertical-stream）参数面 ──

describe('parseEmbedConfigV2', () => {
  it('空 dataset 全缺省：v2 字段默认 + explicit 全 false', () => {
    const c = parseEmbedConfigV2({ slot: 'tok' }, {});
    expect(c.version).toBe(2);
    expect(c.slot).toBe('tok');
    expect(c.lang).toBe('auto');
    expect(c.position).toBe('right');
    expect(c.speed).toBe(16);
    expect(c.reactions).toBe(true);
    expect(c.offsetX).toBe(16);
    expect(c.offsetBottom).toBe(24);
    expect(c.zIndex).toBe(1000);
    expect(c.pollMs).toBeNull();
    expect(c.explicit).toEqual({
      lang: false,
      position: false,
      speed: false,
      reactions: false,
      offsetX: false,
      offsetBottom: false,
      zIndex: false,
    });
  });

  it('data-speed 夹取 8..32；非法回退 16', () => {
    expect(parseEmbedConfigV2({ slot: 'a', speed: '1' }, {}).speed).toBe(8);
    expect(parseEmbedConfigV2({ slot: 'a', speed: '24' }, {}).speed).toBe(24);
    expect(parseEmbedConfigV2({ slot: 'a', speed: '99' }, {}).speed).toBe(32);
    expect(parseEmbedConfigV2({ slot: 'a', speed: 'abc' }, {}).speed).toBe(16);
    expect(parseEmbedConfigV2({ slot: 'a' }, {}).explicit.speed).toBe(false);
    expect(parseEmbedConfigV2({ slot: 'a', speed: '24' }, {}).explicit.speed).toBe(true);
  });

  it('data-reactions 仅 on/off；其他回退 true', () => {
    expect(parseEmbedConfigV2({ slot: 'a', reactions: 'off' }, {}).reactions).toBe(false);
    expect(parseEmbedConfigV2({ slot: 'a', reactions: 'on' }, {}).reactions).toBe(true);
    expect(parseEmbedConfigV2({ slot: 'a', reactions: 'yes' }, {}).reactions).toBe(true);
  });

  it('v1 布局字段（size/interval/imageFit）不在 v2 配置面（195×280 硬性）', () => {
    const c = parseEmbedConfigV2({ slot: 'a', size: 'md', interval: '8000', imageFit: 'cover' }, {});
    expect(c.size).toBeUndefined();
    expect(c.intervalMs).toBeUndefined();
    expect(c.imageFit).toBeUndefined();
  });
});

describe('normalizeBackendSettingsV2 / mergeBackendConfigV2', () => {
  it('v2 字段归一：displayMode 白名单 / speed 夹取 / reactions 布尔回退', () => {
    const s = normalizeBackendSettingsV2({
      position: 'right', size: 'md', intervalMs: 5000, lang: 'auto', collapsedDefault: false,
      imageFit: 'contain', offsetX: 16, offsetBottom: 24, zIndex: 1000,
      displayMode: 'vertical-stream', scrollSpeed: 20, reactionsEnabled: false,
    });
    expect(s.displayMode).toBe('vertical-stream');
    expect(s.scrollSpeed).toBe(20);
    expect(s.reactionsEnabled).toBe(false);
    expect(normalizeBackendSettingsV2({ displayMode: 'weird', scrollSpeed: 999, reactionsEnabled: 'x' }).displayMode).toBe('carousel');
    expect(normalizeBackendSettingsV2({ scrollSpeed: 999 }).scrollSpeed).toBe(32);
    expect(normalizeBackendSettingsV2({ reactionsEnabled: 'x' }).reactionsEnabled).toBe(true);
    expect(normalizeBackendSettingsV2(null)).toBeNull();
  });

  it('合并优先级：data-* 显式保持，缺省字段取后台值', () => {
    const config = parseEmbedConfigV2({ slot: 'a', speed: '24' }, {});
    const merged = mergeBackendConfigV2(config, {
      position: 'left', size: 'md', intervalMs: 5000, lang: 'en', collapsedDefault: true,
      imageFit: 'contain', offsetX: 40, offsetBottom: 80, zIndex: 2000,
      displayMode: 'vertical-stream', scrollSpeed: 12, reactionsEnabled: false,
    });
    expect(merged.speed).toBe(24); // 显式 data-speed 胜出
    expect(merged.reactions).toBe(false); // 后台（未显式）
    expect(merged.position).toBe('left');
    expect(merged.lang).toBe('en');
    expect(merged.offsetX).toBe(40);
    expect(merged.offsetBottom).toBe(80);
    expect(merged.zIndex).toBe(2000);
  });
});

describe('parseConfigMessageV2 / buildEmbedUrlV2', () => {
  it('config 消息：版本闸（低于等于忽略）+ 非法忽略', () => {
    const settings = { position: 'right', size: 'md', intervalMs: 5000, lang: 'auto', collapsedDefault: false };
    expect(parseConfigMessageV2({ photoliveEmbed: true, type: 'config', configVersion: 2, settings }, 1)).not.toBeNull();
    expect(parseConfigMessageV2({ photoliveEmbed: true, type: 'config', configVersion: 1, settings }, 1)).toBeNull();
    expect(parseConfigMessageV2({ photoliveEmbed: true, type: 'config', configVersion: 'x', settings }, 0)).toBeNull();
    expect(parseConfigMessageV2({ photoliveEmbed: true, type: 'config', configVersion: 2, settings: null }, 0)).toBeNull();
  });

  it('URL：v=2 恒在；speed/reactions 仅显式拼接；poll 透传', () => {
    const base = parseEmbedConfigV2({ slot: 'tok' }, {});
    expect(buildEmbedUrlV2('https://e.test', 'tok', base)).toBe(
      'https://e.test/embed/tok?v=2&lang=auto&pos=right',
    );
    const explicit = parseEmbedConfigV2({ slot: 'tok', speed: '20', reactions: 'off', poll: '500' }, {});
    expect(buildEmbedUrlV2('https://e.test', 'tok', explicit)).toBe(
      'https://e.test/embed/tok?v=2&lang=auto&pos=right&speed=20&reactions=off&poll=500',
    );
  });

  it('槽 token 编码防注入（路径段转义）', () => {
    const c = parseEmbedConfigV2({ slot: 'a/b?c' }, {});
    expect(buildEmbedUrlV2('https://e.test', 'a/b?c', c)).toContain('/embed/a%2Fb%3Fc?');
  });
});