/**
 * 统一的素材文件清理逻辑
 * 根据不同的素材类型，收集所有需要删除的文件和关联记录。
 */

import path from 'path'
import {
  buildPublicDisplayUrl,
  buildWhiteBackgroundPublicDisplayPathFromAssetPath,
} from './public-display'
import { prisma } from './prisma'
import {
  LEGACY_STANDARD_MODEL_WHITE_BG_ASSET_TYPE,
  LEGACY_STANDARD_MODEL_WHITE_BG_ASSET_TYPE_PREFIX,
  STANDARD_MODEL_WHITE_BG_OTHER_ASSET_TYPE_PREFIX,
  STANDARD_MODEL_WHITE_BG_ASSET_TYPE_PREFIX,
  STANDARD_MODEL_WHITE_BG_VIEW_ASSET_TYPE_PREFIX,
} from './standard-model-white-background'

export interface MaterialFileInfo {
  fileUrls: string[]
  directories: string[]
  relatedRecords?: {
    assets?: number
    skus?: number
  }
}

export function normalizeDisplayImages(displayImages: unknown): string[] {
  if (!displayImages) {
    return []
  }

  if (Array.isArray(displayImages)) {
    return displayImages.filter(
      (img): img is string => typeof img === 'string' && img.trim().length > 0,
    )
  }

  if (typeof displayImages === 'string') {
    try {
      const parsed = JSON.parse(displayImages)
      if (Array.isArray(parsed)) {
        return parsed.filter(
          (img): img is string => typeof img === 'string' && img.trim().length > 0,
        )
      }
    } catch {
      // 旧数据可能直接存成单个 URL 字符串，这里降级兼容。
    }

    return displayImages.trim() ? [displayImages] : []
  }

  return []
}

/**
 * 收集素材的所有文件路径
 * @param materialId 素材 ID
 * @param material 素材对象，可选；不传时会自动查询
 */
export async function collectMaterialFiles(
  materialId: string,
  material?: any,
): Promise<MaterialFileInfo> {
  const fileUrls: string[] = []
  const directories: string[] = []
  const relatedRecords: { assets?: number; skus?: number } = {}

  if (!material) {
    material = await prisma.material.findUnique({
      where: { id: materialId },
    })
  }

  if (!material) {
    return { fileUrls: [], directories: [], relatedRecords }
  }

  const materialType = String((material as any).materialType || '')

  if ((material as any).zipFilePath) {
    fileUrls.push((material as any).zipFilePath)
  }

  if (
    (material as any).videoSourceUrl &&
    (material as any).videoSourceUrl !== (material as any).zipFilePath
  ) {
    fileUrls.push((material as any).videoSourceUrl)
  }

  if ((material as any).previewUrl) {
    fileUrls.push((material as any).previewUrl)
  }

  if ((material as any).videoPreview540Url) {
    fileUrls.push((material as any).videoPreview540Url)
  }

  if ((material as any).videoPreviewClipUrl) {
    fileUrls.push((material as any).videoPreviewClipUrl)
  }

  if ((material as any).videoCoverUrl) {
    fileUrls.push((material as any).videoCoverUrl)
  }

  fileUrls.push(...normalizeDisplayImages((material as any).displayImages))

  // 任务类素材都可能存在 MaterialAsset 记录。
  const taskMaterialTypes = ['任务-详情', '任务-页面', '任务-其他', '任务-3D原图', '任务-AI原图', '任务-实拍原图', '任务-视频截图', '证书-检测报告'];
  if (taskMaterialTypes.includes(materialType)) {
    const assets = await prisma.materialAsset.findMany({
      where: { materialId },
      select: { fileUrl: true },
    })
    relatedRecords.assets = assets.length

    for (const asset of assets) {
      if (asset.fileUrl) {
        fileUrls.push(asset.fileUrl)
      }
    }

    if (materialType === '任务-详情' || materialType === '任务-页面') {
      directories.push(path.join(process.cwd(), 'uploads', 'product-package', materialId))
    }
  }

  if (materialType === '标准模型') {
    const skus = await prisma.materialSku.findMany({
      where: {
        materialId,
      },
      select: {
        filePath: true,
        previewUrl: true,
      },
    })
    relatedRecords.skus = skus.length

    for (const sku of skus) {
      if (sku.filePath) {
        fileUrls.push(sku.filePath)
      }
      if (sku.previewUrl) {
        fileUrls.push(sku.previewUrl)
      }
    }

    // 兼容旧版整素材白底图 ZIP 键，以及新版 SKU 级白底图 ZIP 键。
    const whiteBgAssets = await prisma.materialAsset.findMany({
      where: {
        materialId,
        OR: [
          { assetType: LEGACY_STANDARD_MODEL_WHITE_BG_ASSET_TYPE },
          { assetType: { startsWith: LEGACY_STANDARD_MODEL_WHITE_BG_ASSET_TYPE_PREFIX } },
          { assetType: { startsWith: STANDARD_MODEL_WHITE_BG_ASSET_TYPE_PREFIX } },
          { assetType: { startsWith: STANDARD_MODEL_WHITE_BG_VIEW_ASSET_TYPE_PREFIX } },
          { assetType: { startsWith: STANDARD_MODEL_WHITE_BG_OTHER_ASSET_TYPE_PREFIX } },
        ],
      },
      select: { fileUrl: true },
    })
    relatedRecords.assets = whiteBgAssets.length;

    for (const asset of whiteBgAssets) {
      if (asset.fileUrl) {
        fileUrls.push(asset.fileUrl)
        const publicDisplayPath = buildWhiteBackgroundPublicDisplayPathFromAssetPath(asset.fileUrl)
        const publicDisplayUrl = publicDisplayPath ? buildPublicDisplayUrl(publicDisplayPath) : null
        if (publicDisplayUrl) {
          fileUrls.push(publicDisplayUrl)
        }
      }
    }

    directories.push(path.join(process.cwd(), 'uploads', 'skus', materialId, 'white-background'))
  }

  return {
    fileUrls: Array.from(new Set(fileUrls.filter((fileUrl) => fileUrl && fileUrl.trim()))),
    directories: Array.from(new Set(directories.filter((dir) => dir && dir.trim()))),
    relatedRecords,
  }
}

/**
 * 删除素材关联记录
 * @param materialId 素材 ID
 * @param materialType 素材类型
 */
export async function deleteMaterialRelatedRecords(
  materialId: string,
  materialType: string,
): Promise<{ deletedAssets?: number; deletedSkus?: number }> {
  const result: { deletedAssets?: number; deletedSkus?: number } = {}

  const taskMaterialTypes = ['任务-详情', '任务-页面', '任务-其他', '任务-3D原图', '任务-AI原图', '任务-实拍原图', '任务-视频截图', '证书-检测报告'];
  if (taskMaterialTypes.includes(materialType)) {
    const deleteResult = await prisma.materialAsset.deleteMany({
      where: { materialId },
    })
    result.deletedAssets = deleteResult.count
  }

  if (materialType === '标准模型') {
    const deleteSkuResult = await prisma.materialSku.deleteMany({
      where: { materialId },
    })
    result.deletedSkus = deleteSkuResult.count

    const deleteWhiteBgResult = await prisma.materialAsset.deleteMany({
      where: {
        materialId,
        OR: [
          { assetType: LEGACY_STANDARD_MODEL_WHITE_BG_ASSET_TYPE },
          { assetType: { startsWith: LEGACY_STANDARD_MODEL_WHITE_BG_ASSET_TYPE_PREFIX } },
          { assetType: { startsWith: STANDARD_MODEL_WHITE_BG_ASSET_TYPE_PREFIX } },
          { assetType: { startsWith: STANDARD_MODEL_WHITE_BG_VIEW_ASSET_TYPE_PREFIX } },
          { assetType: { startsWith: STANDARD_MODEL_WHITE_BG_OTHER_ASSET_TYPE_PREFIX } },
        ],
      },
    })

    result.deletedAssets = (result.deletedAssets || 0) + deleteWhiteBgResult.count
  }

  return result
}