// 媒体域集成测试：media_assets 双唯一 UNIQUE(site_id, source_url) 与 UNIQUE(site_id, public_path)
// （各带"换列值放行"对照组——同站不同源 URL / 不同公开路径都是合法的第二次入库）+
// media_usages 复合主键 (media_asset_id, content_revision_id, field_path)（换 field_path 放行——
// 同媒体同修订不同字段位引用合法）+ status enum 四值可写往返 + source_id 可空（WP 站外媒体无源 ID）。
// Task 13 起夹具走公共 helpers（createSiteFixture/withImmutableCleanup/withTestDb/rejectionMessage）；
// 生命周期纪律不变：随机后缀插入 + finally 反序清理；content_revisions 不可变，清场走
// DISABLE→删→ENABLE 封装。清场顺序：usages → assets → connections →（删 revisions）→ entries → site。
import { describe, it, expect } from 'vitest'
import { createSiteFixture, withImmutableCleanup, withTestDb, rejectionMessage, type Db } from './helpers.js'

type Fixture = {
  siteId: string
  connectionId: string
  entryId: string
  revisionId: string
  assetId: string
  rand: string
  sourceUrl: string
  publicPath: string
}

// 建链（FK 依赖顺序）：site → source_connection（asset 的来源）+ content_entry → content_revision
// （usage 的引用目标）→ media_asset（ready 态，供双唯一探测与 enum 往返）。
async function setupMediaFixture(db: Db): Promise<Fixture> {
  const site = await createSiteFixture(db, 'media')
  const rand = site.rand
  const siteId = site.siteId
  const conn = (await db.execute(`insert into source_connections (id, site_id, kind, name, configuration)
    values (gen_random_uuid(), '${siteId}', 'wxr', 'media-conn-${rand}', '{}') returning id`)) as any
  const entry = (await db.execute(`insert into content_entries (id, site_id, type_key, lifecycle_status)
    values (gen_random_uuid(), '${siteId}', 'post', 'active') returning id`)) as any
  const rev = (await db.execute(`insert into content_revisions (id, site_id, content_entry_id, locale, schema_version, data, checksum, source_kind, created_by)
    values (gen_random_uuid(), '${siteId}', '${entry[0].id}', 'en', 1, '{"body":"<img>"}', 'ck-media-${rand}', 'manual', 'tester') returning id`)) as any
  const sourceUrl = `https://wp.example/uploads/${rand}/pic.jpg`
  const publicPath = `/uploads/${rand}/pic.jpg`
  const asset = (await db.execute(`insert into media_assets (id, site_id, source_connection_id, source_id, source_url, source_path, storage_path, public_path, sha256, detected_mime, declared_mime, byte_size, width, height, alt_text, status)
    values (gen_random_uuid(), '${siteId}', '${conn[0].id}', 'wp-att-${rand}', '${sourceUrl}', 'wp-content/uploads/${rand}/pic.jpg', 'media/${rand}/pic.jpg', '${publicPath}', 'sha256-${rand}', 'image/jpeg', 'image/jpg', 2048, 640, 480, 'Pic ${rand}', 'ready') returning id`)) as any
  return {
    siteId,
    connectionId: conn[0].id,
    entryId: entry[0].id,
    revisionId: rev[0].id,
    assetId: asset[0].id,
    rand,
    sourceUrl,
    publicPath,
  }
}

// 反序清理：media_usages → media_assets → source_connections →
// content_revisions（不可变：DISABLE→删→ENABLE）→ content_entries → site。
async function cleanupMediaFixture(db: Db, f: Fixture) {
  await db.execute(`delete from media_usages where site_id = '${f.siteId}'`)
  await db.execute(`delete from media_assets where site_id = '${f.siteId}'`)
  await db.execute(`delete from source_connections where site_id = '${f.siteId}'`)
  await withImmutableCleanup(db, 'content_revisions', 'content_revisions_immutable', `site_id = '${f.siteId}'`)
  await db.execute(`delete from content_entries where site_id = '${f.siteId}'`)
  await db.execute(`delete from sites where id = '${f.siteId}'`)
}

async function withMediaFixture(fn: (db: Db, f: Fixture) => Promise<void>) {
  await withTestDb(async (db) => {
    const f = await setupMediaFixture(db)
    try {
      await fn(db, f)
    } finally {
      await cleanupMediaFixture(db, f)
    }
  })
}

// 探测插入的第二份资产：除显式指定的列外全部换新值，保证被测唯一键是唯一可能的冲突源。
function assetProbe(f: Fixture, overrides: { sourceUrl: string; publicPath: string; sourceId?: string | null }) {
  const suffix = Math.random().toString(36).slice(2, 8)
  return `insert into media_assets (id, site_id, source_connection_id, source_id, source_url, source_path, storage_path, public_path, sha256, detected_mime, byte_size, status)
    values (gen_random_uuid(), '${f.siteId}', '${f.connectionId}', ${overrides.sourceId === undefined ? `'probe-${suffix}'` : overrides.sourceId === null ? 'null' : `'${overrides.sourceId}'`}, '${overrides.sourceUrl}', 'wp-content/uploads/probe-${suffix}', 'media/probe-${suffix}', '${overrides.publicPath}', 'sha256-probe-${suffix}', 'image/jpeg', 1024, 'ready')`
}

describe('媒体域约束', () => {
  it('media_assets UNIQUE(site_id, source_url)：同站同源 URL 重复插入拒绝，换 source_url 放行', async () => {
    await withMediaFixture(async (db, f) => {
      // public_path 换新，确保拒绝只可能来自 source_url 唯一键
      expect(await rejectionMessage(db, assetProbe(f, {
        sourceUrl: f.sourceUrl,
        publicPath: `/uploads/probe-${f.rand}-a.jpg`,
      }))).toMatch(/media_assets_source_url_uq/)
      // 对照组：同站换源 URL（公开路径同步换新）→ 允许（同站不同来源的同一张图是两份资产）
      await db.execute(assetProbe(f, {
        sourceUrl: `https://wp.example/${f.rand}/other.jpg`,
        publicPath: `/uploads/probe-${f.rand}-b.jpg`,
      }))
    })
  })

  it('media_assets UNIQUE(site_id, public_path)：同站同公开路径重复插入拒绝，换 public_path 放行', async () => {
    await withMediaFixture(async (db, f) => {
      // source_url 换新，确保拒绝只可能来自 public_path 唯一键
      expect(await rejectionMessage(db, assetProbe(f, {
        sourceUrl: `https://cdn.example/${f.rand}/pic.jpg`,
        publicPath: f.publicPath,
      }))).toMatch(/media_assets_public_path_uq/)
      // 对照组：同站换公开路径（源 URL 同步换新）→ 允许（公开路径是站内命名空间，不重不解）
      await db.execute(assetProbe(f, {
        sourceUrl: `https://wp.example/${f.rand}/another.jpg`,
        publicPath: `/uploads/probe-${f.rand}-c.jpg`,
      }))
    })
  })

  it('media_usages 复合主键 (media_asset_id, content_revision_id, field_path)：同三元组重复拒绝，换 field_path 放行', async () => {
    await withMediaFixture(async (db, f) => {
      await db.execute(`insert into media_usages (site_id, media_asset_id, content_revision_id, field_path, source_url)
        values ('${f.siteId}', '${f.assetId}', '${f.revisionId}', 'data.body.img[0]', '${f.sourceUrl}')`)
      expect(await rejectionMessage(db, `insert into media_usages (site_id, media_asset_id, content_revision_id, field_path, source_url)
        values ('${f.siteId}', '${f.assetId}', '${f.revisionId}', 'data.body.img[0]', '${f.sourceUrl}')`))
        .toMatch(/media_usages_media_asset_id_content_revision_id_field_path_pk/)
      // 对照组：同媒体同修订换字段位 → 允许（一图在正文中被引用多次是合法的多行 usage）
      await db.execute(`insert into media_usages (site_id, media_asset_id, content_revision_id, field_path, source_url)
        values ('${f.siteId}', '${f.assetId}', '${f.revisionId}', 'data.body.img[1]', '${f.sourceUrl}')`)
    })
  })

  it('media_assets.status enum 四值（ready/missing/quarantined/unsupported）可写往返，第五值拒绝', async () => {
    await withMediaFixture(async (db, f) => {
      for (const status of ['missing', 'quarantined', 'unsupported', 'ready']) {
        await db.execute(`update media_assets set status = '${status}' where id = '${f.assetId}'`)
        const row = (await db.execute(`select status from media_assets where id = '${f.assetId}'`)) as any
        expect(row[0].status).toBe(status)
      }
      // enum 在库：类型化列拒绝四值之外的任意字符串
      expect(await rejectionMessage(db, `update media_assets set status = 'bogus' where id = '${f.assetId}'`))
        .toMatch(/media_asset_status/)
    })
  })

  it('media_assets.source_id 可空：插 NULL 成功（WP 站外媒体无源 ID）', async () => {
    await withMediaFixture(async (db, f) => {
      await db.execute(assetProbe(f, {
        sourceId: null,
        sourceUrl: `https://external.example/${f.rand}/hotlink.jpg`,
        publicPath: `/uploads/probe-${f.rand}-d.jpg`,
      }))
      const row = (await db.execute(`select source_id from media_assets
        where site_id = '${f.siteId}' and source_url = 'https://external.example/${f.rand}/hotlink.jpg'`)) as any
      expect(row[0].source_id).toBeNull()
    })
  })
})