export const VIDEO_CANVAS_FUNCTION_CONFIG_KEY = "video_canvas_function_config";

export type VideoCanvasFunctionKind =
  | "multimodal"
  | "image"
  | "image-edit"
  | "video"
  | "audio"
  | "utility"
  | "workflow";

export type VideoCanvasBackendRoute =
  | "canvas-generate-image"
  | "canvas-generate-video"
  | "canvas-workflow-analyze"
  | "angle-edit"
  | "enhance"
  | "enhance-pro"
  | "extend"
  | "remove-bg"
  | "layer-split"
  | "local";

export type VideoCanvasFunctionDefinition = {
  key: string;
  label: string;
  kind: VideoCanvasFunctionKind;
  route: VideoCanvasBackendRoute;
  enabled: boolean;
  model?: string;
  creditCost?: number;
  prompt: string;
  description: string;
  requiresBackend?: boolean;
};

export type VideoCanvasFunctionConfig = {
  enabled: boolean;
  defaultImageModel: string;
  defaultVideoModel: string;
  defaultMultimodalModel: string;
  functions: Record<string, VideoCanvasFunctionDefinition>;
};

const defaultFunctions: VideoCanvasFunctionDefinition[] = [
  {
    key: "character-three-view",
    label: "角色三视图",
    kind: "image-edit",
    route: "canvas-generate-image",
    enabled: true,
    creditCost: 14,
    prompt:
      "以输入角色图为唯一角色参考，生成正面、侧面、背面三视图角色设定图。保持五官、发型、服装、颜色和体型一致，干净白底，三视图水平排布，适合后续视频角色一致性使用。",
    description: "官方角色三视图预设，使用参考图生图/编辑模型。",
  },
  {
    key: "multi-view-nine-grid",
    label: "多机位九宫格",
    kind: "image-edit",
    route: "canvas-generate-image",
    enabled: true,
    creditCost: 14,
    prompt:
      "以选中图片作为角色、服装、发型、场景光线的唯一参考，生成一张 3x3 多机位分镜合成图。必须是 9 个明显不同的镜头画面，不是同一张图裁切或重复人脸。九格分别包含：1 森林环境远景/主体很小，2 全身远景，3 中景正面，4 侧面半身，5 低机位或俯拍，6 面部近景，7 手部/衣袖/动作细节，8 背面或侧背，9 仰视或情绪特写。保持同一角色身份、绿色服装、自然森林光线一致，每格构图、景别、机位和主体大小必须不同。输出为单张 16:9 图片，九格之间使用清晰黑色分割线，不能出现文字、水印、编号，不能白底棚拍。",
    description: "官方九宫格工具：先生成带黑色分割线的 3x3 分镜图，再由宫格切分拆成单张镜头。",
  },
  {
    key: "grid-split",
    label: "宫格切分",
    kind: "utility",
    route: "local",
    enabled: true,
    creditCost: 0,
    prompt: "识别黑色宫格分割线，将合成图切分为可单独调整的镜头图片。",
    description: "浏览器端识别黑色分割线并生成切片节点；后端可后续替换为更稳的图像分割服务。",
  },
  {
    key: "lighting",
    label: "打光",
    kind: "image-edit",
    route: "canvas-generate-image",
    enabled: true,
    creditCost: 14,
    prompt:
      "在保持主体、构图和身份一致的前提下，对图片进行电影级光影重塑，增强轮廓光、层次、对比和空间感，保留自然材质细节。",
    description: "图片编辑生图模型，复刻官方打光工具。",
  },
  {
    key: "hd-upscale",
    label: "高清",
    kind: "utility",
    route: "enhance",
    enabled: true,
    creditCost: 8,
    prompt: "提升图片清晰度、细节和分辨率，保持原图内容不变。",
    description: "接入现有图片增强接口；高清重绘可在模型字段指定增强 Pro。",
  },
  {
    key: "panorama-720",
    label: "720 全景",
    kind: "image-edit",
    route: "extend",
    enabled: true,
    creditCost: 14,
    prompt:
      "基于当前图片向四周扩展为 720 全景视野，保持主体与场景一致，补全自然环境和空间透视，避免变形和重复纹理。",
    description: "优先使用拓图接口，必要时可切到图片编辑生图模型。",
  },
  {
    key: "image-outpaint",
    label: "扩图",
    kind: "utility",
    route: "extend",
    enabled: true,
    creditCost: 10,
    prompt: "在保持主体不变的前提下扩展画面边界，补全自然背景和构图。",
    description: "对应官方高清菜单里的扩图。",
  },
  {
    key: "image-repaint",
    label: "重绘",
    kind: "image-edit",
    route: "canvas-generate-image",
    enabled: true,
    creditCost: 14,
    prompt: "保持主体结构和身份一致，按照用户补充提示重绘画面局部或整体风格。",
    description: "对应官方高清菜单里的重绘。",
  },
  {
    key: "image-erase",
    label: "擦除",
    kind: "image-edit",
    route: "canvas-generate-image",
    enabled: true,
    creditCost: 10,
    prompt: "根据用户标记或文字说明移除指定元素，并自然补全背景纹理。",
    description: "当前以前端提示词占位接图片编辑模型，后续可替换为蒙版编辑接口。",
  },
  {
    key: "remove-bg",
    label: "抠图",
    kind: "utility",
    route: "remove-bg",
    enabled: true,
    creditCost: 4,
    prompt: "移除图片背景，保留主体透明或干净背景结果。",
    description: "接入现有抠图接口。",
  },
  {
    key: "image-crop",
    label: "裁剪",
    kind: "utility",
    route: "local",
    enabled: true,
    creditCost: 0,
    prompt: "按用户选择的裁剪比例或宫格切片范围处理图片。",
    description: "本地画布裁剪/宫格切分能力。",
  },
  {
    key: "angle-edit",
    label: "多角度编辑器",
    kind: "image-edit",
    route: "angle-edit",
    enabled: true,
    creditCost: 1,
    prompt: "根据水平环绕、垂直俯仰和景别缩放参数生成新的角色/主体视角。",
    description: "接现有 /api/angle-edit，多角度编辑器提交时触发。",
  },
  {
    key: "story-script",
    label: "故事脚本生成",
    kind: "multimodal",
    route: "canvas-workflow-analyze",
    enabled: true,
    creditCost: 6,
    prompt: "根据输入文本、图片或视频参考，生成结构化分镜脚本，包含镜号、场景、画面、声音和镜头节奏。",
    description: "多模态大模型/文本模型生成脚本表格。",
  },
  {
    key: "image-to-prompt",
    label: "图片反推提示词",
    kind: "multimodal",
    route: "canvas-workflow-analyze",
    enabled: true,
    creditCost: 3,
    prompt: "分析参考图片，输出结构化中文提示词，包括主体、环境、构图、光影、镜头语言和风格关键词。",
    description: "多模态识图生成提示词。",
  },
  {
    key: "text-to-video",
    label: "文生视频",
    kind: "video",
    route: "canvas-generate-video",
    enabled: true,
    creditCost: 14,
    prompt: "根据文本描述生成短视频，保持镜头运动、节奏和电影级质感。",
    description: "视频生成模型，走现有视频生成接口。",
  },
  {
    key: "first-frame-video",
    label: "首帧图生视频",
    kind: "video",
    route: "canvas-generate-video",
    enabled: true,
    creditCost: 14,
    prompt: "以参考图片作为视频首帧，生成自然流畅的短视频。",
    description: "图片到视频/首帧生视频。",
  },
  {
    key: "first-last-frame-video",
    label: "首尾帧生成视频",
    kind: "video",
    route: "canvas-generate-video",
    enabled: true,
    creditCost: 14,
    prompt: "以两张参考图作为首帧和尾帧，生成首尾连贯的短视频。",
    description: "首尾帧视频生成。",
  },
  {
    key: "audio-to-video",
    label: "音频生视频",
    kind: "video",
    route: "canvas-generate-video",
    enabled: true,
    creditCost: 14,
    prompt: "根据上传音频生成对应场景画面，镜头语言、节奏、音乐匹配情绪变化，电影级质感。",
    description: "官方为音频+参考图到视频；当前先接视频生成提示词和参考图，音频节拍解析接口后续补充。",
    requiresBackend: true,
  },
];

export const defaultVideoCanvasFunctionConfig: VideoCanvasFunctionConfig = {
  enabled: true,
  defaultImageModel: "auto",
  defaultVideoModel: "auto",
  defaultMultimodalModel: "auto",
  functions: Object.fromEntries(defaultFunctions.map((item) => [item.key, item])),
};

function isRecord(value: unknown): value is Record<string, unknown> {
  return Boolean(value) && typeof value === "object" && !Array.isArray(value);
}

function normalizeFunctionDefinition(
  key: string,
  value: unknown,
  fallback: VideoCanvasFunctionDefinition,
): VideoCanvasFunctionDefinition {
  const incoming = isRecord(value) ? value : {};
  const normalized: VideoCanvasFunctionDefinition = {
    ...fallback,
    key,
    label: String(incoming.label || fallback.label),
    kind: (incoming.kind as VideoCanvasFunctionKind) || fallback.kind,
    route: (incoming.route as VideoCanvasBackendRoute) || fallback.route,
    enabled: typeof incoming.enabled === "boolean" ? incoming.enabled : fallback.enabled,
    model: typeof incoming.model === "string" ? incoming.model : fallback.model,
    creditCost:
      typeof incoming.creditCost === "number" && Number.isFinite(incoming.creditCost)
        ? Math.max(0, incoming.creditCost)
        : fallback.creditCost,
    prompt: String(incoming.prompt || fallback.prompt),
    description: String(incoming.description || fallback.description),
    requiresBackend:
      typeof incoming.requiresBackend === "boolean"
        ? incoming.requiresBackend
        : fallback.requiresBackend,
  };
  return normalized;
}

export function normalizeVideoCanvasFunctionConfig(value: unknown): VideoCanvasFunctionConfig {
  if (!isRecord(value)) return defaultVideoCanvasFunctionConfig;
  const incomingFunctions = isRecord(value.functions) ? value.functions : {};
  const functions: Record<string, VideoCanvasFunctionDefinition> = {};

  for (const [key, fallback] of Object.entries(defaultVideoCanvasFunctionConfig.functions)) {
    functions[key] = normalizeFunctionDefinition(key, incomingFunctions[key], fallback);
  }

  for (const [key, customValue] of Object.entries(incomingFunctions)) {
    if (functions[key] || !isRecord(customValue)) continue;
    const fallback: VideoCanvasFunctionDefinition = {
      key,
      label: String(customValue.label || key),
      kind: (customValue.kind as VideoCanvasFunctionKind) || "workflow",
      route: (customValue.route as VideoCanvasBackendRoute) || "local",
      enabled: customValue.enabled !== false,
      creditCost: typeof customValue.creditCost === "number" ? Math.max(0, customValue.creditCost) : 0,
      prompt: String(customValue.prompt || ""),
      description: String(customValue.description || "自定义视频画布功能"),
    };
    functions[key] = normalizeFunctionDefinition(key, customValue, fallback);
  }

  return {
    enabled: value.enabled !== false,
    defaultImageModel:
      typeof value.defaultImageModel === "string" && value.defaultImageModel.trim()
        ? value.defaultImageModel.trim()
        : defaultVideoCanvasFunctionConfig.defaultImageModel,
    defaultVideoModel:
      typeof value.defaultVideoModel === "string" && value.defaultVideoModel.trim()
        ? value.defaultVideoModel.trim()
        : defaultVideoCanvasFunctionConfig.defaultVideoModel,
    defaultMultimodalModel:
      typeof value.defaultMultimodalModel === "string" && value.defaultMultimodalModel.trim()
        ? value.defaultMultimodalModel.trim()
        : defaultVideoCanvasFunctionConfig.defaultMultimodalModel,
    functions,
  };
}