/**
 * 剪辑计划编辑器 API
 * 对接后端 /api/v1/templates 路由
 */
import apiClient from "./client";

/* ──────────── 类型定义 ──────────── */

/** 模板模式（后端枚举值） */
export type TemplateMode = "pip" | "voice_over" | "one_take" | "voice_pip";

/** 模式显示名称映射 */
export const MODE_LABELS: Record<TemplateMode, string> = {
  pip: "画中画",
  voice_over: "人物口播",
  one_take: "一镜到底",
  voice_pip: "口播+混剪",
};

/** 模式颜色映射 */
export const MODE_COLORS: Record<TemplateMode, string> = {
  pip: "blue",
  voice_over: "green",
  one_take: "orange",
  voice_pip: "purple",
};

/** 标题配置 */
export interface TitleConfig {
  ai_auto_select: boolean;
  content: string;
  font_preset: string;
  font_color: string;
  font_size: number;
  position: string;
}

/** 字幕配置 */
export interface SubtitleConfig {
  enabled: boolean;
  position: string;
  font: string;
  color: string;
  size: number;
  animation: string;
}

/** BGM 配置 */
export interface BgmConfig {
  enabled: boolean;
  music_id: string;
}

/** 模板片段 */
export interface TemplateSegment {
  id?: string;
  segment_order: number;
  duration_min: number;
  duration_max: number;
  material_type: string | null;
}

/** 剪辑模板 */
export interface EditingTemplate {
  id: string;
  name: string;
  mode: TemplateMode;
  category: string;
  tags: string[];
  title_config: TitleConfig;
  subtitle_config: SubtitleConfig;
  bgm_config: BgmConfig;
  estimated_duration: number;
  segments: TemplateSegment[];
  is_active?: boolean;
  created_at: string;
  updated_at: string;
}

/** 模板分类 */
export interface TemplateCategory {
  id: string;
  name: string;
  created_at?: string;
}

/** 创建/更新模板请求体 */
export interface SaveTemplatePayload {
  name: string;
  mode: TemplateMode;
  category: string;
  tags: string[];
  title_config: TitleConfig;
  subtitle_config: SubtitleConfig;
  bgm_config: BgmConfig;
  estimated_duration: number;
  segments: Omit<TemplateSegment, "id">[];
}

/** 使用模板生成请求体 */
export interface GenerateFromTemplatePayload {
  voiceover_duration: number;
}

/** 验证/生成响应 */
export interface ValidateWarning {
  code: string;
  message: string;
  details?: Record<string, unknown>;
}

/** 使用模板生成响应 */
export interface GenerateFromTemplateResponse {
  template: EditingTemplate;
  warnings: ValidateWarning[];
}

/** 列表响应（带分页） */
export interface ListTemplatesResponse {
  items: EditingTemplate[];
  total: number;
}

/** 分类列表响应 */
export interface ListCategoriesResponse {
  items: TemplateCategory[];
}

// ============ API 函数 ============

/** 获取模板列表 */
export const getEditingTemplates = async (params?: {
  category?: string;
  tag?: string;
  skip?: number;
  limit?: number;
}): Promise<EditingTemplate[]> => {
  const response = await apiClient.get<ListTemplatesResponse>("/templates", {
    params: {
      skip: params?.skip ?? 0,
      limit: params?.limit ?? 50,
    },
  });
  let list = response.data.items;
  if (params?.category)
    list = list.filter((t) => t.category === params.category);
  if (params?.tag) list = list.filter((t) => t.tags.includes(params.tag!));
  return list;
};

/** 获取模板详情 */
export const getEditingTemplate = async (
  id: string,
): Promise<EditingTemplate> => {
  const response = await apiClient.get<EditingTemplate>(`/templates/${id}`);
  return response.data;
};

/** 创建模板 */
export const createEditingTemplate = async (
  data: SaveTemplatePayload,
): Promise<EditingTemplate> => {
  const response = await apiClient.post<EditingTemplate>("/templates", data);
  return response.data;
};

/** 更新模板 */
export const updateEditingTemplate = async (
  id: string,
  data: SaveTemplatePayload,
): Promise<EditingTemplate> => {
  const response = await apiClient.patch<EditingTemplate>(
    `/templates/${id}`,
    data,
  );
  return response.data;
};

/** 删除模板 */
export const deleteEditingTemplate = async (id: string): Promise<void> => {
  await apiClient.delete(`/templates/${id}`);
};

/** 获取模板分类列表 */
export const getTemplateCategories = async (): Promise<TemplateCategory[]> => {
  const response = await apiClient.get<ListCategoriesResponse>(
    "/templates/categories/list",
  );
  return response.data.items;
};

/** 使用模板生成视频（调用 validate 端点） */
export const generateFromTemplate = async (
  templateId: string,
  data: GenerateFromTemplatePayload,
): Promise<GenerateFromTemplateResponse> => {
  const response = await apiClient.post<GenerateFromTemplateResponse>(
    `/templates/${templateId}/validate`,
    data,
  );
  return response.data;
};