xiaoxia-saas/apps/web/src/pages/generate/utils/buildClipsFromAssets.ts

/**
 * 将选中素材 + 模板 segments 构建为 edit_plan_clips 写入数据。
 *
 * 逻辑必须与 FrontendPreviewPlayer.tsx 中 buildPlaybackSegments 完全一致：
 *   assetDuration = asset.duration || asset.metadata?.duration || 30
 *   tplSeg = templateSegments[i] || lastSegment
 *   segDuration = clamp(assetDuration, tplSeg.duration_min, tplSeg.duration_max)
 *   start_time = 0
 *   duration = segDuration
 */
import type { AssetItem } from "@/api/assets"
import type { TemplateSegment } from "@/api/templates/types"
import type { EditPlanClipInput } from "@/api/template-editor"

interface BuildClipsOptions {
  /** 选中的素材 ID 列表（按选择顺序） */
  selectedIds: string[]
  /** 已加载的素材列表（用于查 duration） */
  materials: AssetItem[]
  /** 智能匹配返回的素材（auto 模式下可能不在 materials 列表中） */
  smartMatchedAssets?: AssetItem[]
  /** 模板 segments */
  templateSegments?: TemplateSegment[]
}

export function buildClipsFromAssets({
  selectedIds,
  materials,
  smartMatchedAssets = [],
  templateSegments = [],
}: BuildClipsOptions): EditPlanClipInput[] {
  if (!selectedIds.length) return []

  // 合并两个素材来源，建立 id → asset 索引
  const assetMap = new Map<string, AssetItem>()
  for (const a of materials) assetMap.set(a.id, a)
  for (const a of smartMatchedAssets) assetMap.set(a.id, a)

  const lastSeg = templateSegments[templateSegments.length - 1]

  return selectedIds.map((assetId, i) => {
    const asset = assetMap.get(assetId)
    const assetDuration = asset?.duration || asset?.metadata?.duration || 30

    const tplSeg = templateSegments[i] || lastSeg
    const segDuration = tplSeg
      ? Math.min(tplSeg.duration_max, Math.max(tplSeg.duration_min, assetDuration))
      : Math.min(assetDuration, 10)

    return {
      asset_id: assetId,
      start_time: 0,
      duration: segDuration,
      order: i,
    }
  })
}