{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "video.dsl/render-plan/v1alpha1",
  "title": "Render Plan v1alpha1",
  "description": "DSL 与 Remotion 实现之间的防腐层中间态，包含完整时间线、已解析资产和渲染参数。",
  "type": "object",
  "required": ["version", "dslVersion", "timeline", "renderConfig"],
  "properties": {
    "version": {
      "type": "string",
      "const": "v1alpha1"
    },
    "dslVersion": {
      "type": "string"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time"
    },
    "status": {
      "type": "string",
      "enum": ["planning", "resolving-assets", "assets-ready", "compiling", "rendering", "completed", "failed"],
      "default": "planning"
    },
    "resolvedAssets": {
      "type": "array",
      "items": { "$ref": "#/definitions/ResolvedAsset" },
      "description": "所有已解析/已生成的素材"
    },
    "timeline": {
      "type": "array",
      "items": { "$ref": "#/definitions/TimelineEntry" },
      "description": "展开后的时间线条目"
    },
    "renderConfig": {
      "$ref": "#/definitions/RenderConfig"
    },
    "remotionProps": {
      "type": "object",
      "description": "编译后直接传给 Remotion 的顶层 props",
      "additionalProperties": true
    },
    "errors": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "phase": { "type": "string" },
          "message": { "type": "string" },
          "sceneId": { "type": "string" },
          "assetId": { "type": "string" },
          "timestamp": { "type": "string", "format": "date-time" }
        }
      }
    },
    "logs": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "phase": { "type": "string" },
          "message": { "type": "string" },
          "timestamp": { "type": "string", "format": "date-time" }
        }
      }
    }
  },
  "definitions": {
    "ResolvedAsset": {
      "type": "object",
      "required": ["assetId", "type", "status"],
      "properties": {
        "assetId": { "type": "string" },
        "type": {
          "type": "string",
          "enum": ["image", "video", "audio", "avatar", "subtitle", "bgm"]
        },
        "source": {
          "type": "string",
          "enum": ["existing", "gen-image", "gen-video", "gen-voice", "gen-digital-human"]
        },
        "status": {
          "type": "string",
          "enum": ["pending", "generating", "generated", "failed", "skipped"]
        },
        "url": { "type": "string" },
        "localPath": { "type": "string" },
        "duration": { "type": "number" },
        "width": { "type": "integer" },
        "height": { "type": "integer" },
        "mimeType": { "type": "string" },
        "fileSize": { "type": "integer" },
        "generatedBy": {
          "type": "object",
          "properties": {
            "skill": { "type": "string" },
            "model": { "type": "string" },
            "params": { "type": "object", "additionalProperties": true },
            "startedAt": { "type": "string", "format": "date-time" },
            "completedAt": { "type": "string", "format": "date-time" }
          }
        },
        "retryCount": { "type": "integer", "default": 0 },
        "maxRetries": { "type": "integer", "default": 3 }
      }
    },
    "TimelineEntry": {
      "type": "object",
      "required": ["sceneId", "startFrame", "endFrame", "durationFrames"],
      "properties": {
        "sceneId": { "type": "string" },
        "startFrame": { "type": "integer" },
        "endFrame": { "type": "integer" },
        "durationFrames": { "type": "integer" },
        "startTime": { "type": "number", "description": "开始时间（秒）" },
        "endTime": { "type": "number", "description": "结束时间（秒）" },
        "compositionId": { "type": "string" },
        "props": {
          "type": "object",
          "additionalProperties": true,
          "description": "该场景对应的 Remotion props"
        },
        "layers": {
          "type": "array",
          "items": { "$ref": "#/definitions/Layer" }
        },
        "subtitleSegments": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "text": { "type": "string" },
              "startFrame": { "type": "integer" },
              "endFrame": { "type": "integer" }
            }
          }
        },
        "transition": {
          "type": "object",
          "properties": {
            "type": { "type": "string" },
            "durationFrames": { "type": "integer" }
          }
        }
      }
    },
    "Layer": {
      "type": "object",
      "required": ["layerId", "type"],
      "properties": {
        "layerId": { "type": "string" },
        "type": {
          "type": "string",
          "enum": ["visual", "audio", "text", "overlay"]
        },
        "assetId": { "type": "string" },
        "zIndex": { "type": "integer" },
        "startFrame": { "type": "integer" },
        "endFrame": { "type": "integer" },
        "position": {
          "type": "object",
          "properties": {
            "x": { "type": "number" },
            "y": { "type": "number" }
          }
        },
        "size": {
          "type": "object",
          "properties": {
            "width": { "type": "number" },
            "height": { "type": "number" }
          }
        },
        "opacity": { "type": "number", "default": 1 },
        "animation": { "type": "object", "additionalProperties": true }
      }
    },
    "RenderConfig": {
      "type": "object",
      "required": ["width", "height", "fps", "totalFrames"],
      "properties": {
        "width": { "type": "integer" },
        "height": { "type": "integer" },
        "fps": { "type": "integer" },
        "totalFrames": { "type": "integer" },
        "totalDuration": { "type": "number", "description": "总时长（秒）" },
        "codec": { "type": "string", "default": "h264" },
        "crf": { "type": "integer", "default": 18 },
        "outputFormat": { "type": "string", "enum": ["mp4", "webm"], "default": "mp4" }
      }
    }
  }
}