/* ==========================================================================
   api.js — 数据访问层（真实 REST）
   所有页面只通过 window.API 访问后端。
   ========================================================================== */

(function () {
  async function request(path, options) {
    const res = await fetch(path, {
      headers: { "Content-Type": "application/json" },
      ...options,
    });
    const text = await res.text();
    let data = null;
    if (text) {
      try {
        data = JSON.parse(text);
      } catch (e) {
        data = text;
      }
    }
    if (!res.ok) {
      let detail =
        data && typeof data === "object"
          ? data.detail || data.message || JSON.stringify(data)
          : String(data || res.statusText);
      if (Array.isArray(detail)) {
        detail = detail.map((item) => (item.loc || []).slice(1).join(".") + ": " + item.msg).join("；");
      }
      throw new Error(detail);
    }
    return data;
  }

  const get = (path) => request(path, { method: "GET" });
  const post = (path, body) =>
    request(path, { method: "POST", body: JSON.stringify(body || {}) });
  const patch = (path, body) =>
    request(path, { method: "PATCH", body: JSON.stringify(body || {}) });
  const del = (path) => request(path, { method: "DELETE" });

  window.API = {
    /* ---------------------------------------------------------- 供应商 */
    async listProviders() {
      return get("/api/providers");
    },

    async saveProvider(payload) {
      await post("/api/providers", payload);
      return get("/api/providers");
    },

    async deleteProvider(id) {
      await del("/api/providers/" + encodeURIComponent(id));
      return get("/api/providers");
    },

    /* ------------------------------------- 上游模型发现（含 image 筛选） */
    /* 按供应商 ID 拉取上游模型 */
    async discoverProviderModels(providerId) {
      return post("/api/providers/" + encodeURIComponent(providerId) + "/discover", {});
    },

    /* 保存勾选的模型 */
    async saveProviderModels(providerId, modelIds, enabled, note) {
      await post("/api/providers/" + encodeURIComponent(providerId) + "/models", {
        model_ids: modelIds,
        enabled: enabled !== false,
        note: note || "自动发现",
      });
      return get("/api/models?provider_id=" + encodeURIComponent(providerId));
    },

    /* ---------------------------------------------------------- 模型 */
    async listModels(providerId) {
      const q = providerId ? "?provider_id=" + encodeURIComponent(providerId) : "";
      return get("/api/models" + q);
    },

    async toggleModel(modelId, enabled) {
      await patch("/api/models/" + encodeURIComponent(modelId), { enabled: !!enabled });
      return get("/api/models");
    },

    async setModelsEnabled(modelIds, enabled) {
      await post("/api/models/bulk", { ids: modelIds, enabled: !!enabled });
      return get("/api/models");
    },

    /* ---------------------------------------------------------- 画廊 */
    async listGalleries() {
      return get("/api/galleries");
    },

    async listGallery(profileName) {
      if (!profileName) return [];
      return get("/api/galleries/" + encodeURIComponent(profileName));
    },

    async deleteGalleryImage(profileName, filename) {
      return del("/api/galleries/" + encodeURIComponent(profileName) + "/" + encodeURIComponent(filename));
    },

    /* ------------------------------------------------------ 生成记录 */
    async listGenerations() {
      return get("/api/generations");
    },

    /* ---------------------------------------------------- 网页端出图 */
    /* 网页端固定 profile_name = "user"，落到 output/user/（不存在则自动创建） */
    async generateImage(payload) {
      const body = Object.assign({}, payload);
      if (!body.profile_name) body.profile_name = "user";
      const res = await post("/api/generate", body);
      return {
        generation: {
          id: res.id,
          provider_id: res.provider,
          provider_name: res.provider_name,
          model: res.model,
          profile_name: res.profile_name,
          size: res.size,
          ratio: res.ratio,
          created_at: res.created_at,
        },
        images: res.images || [],
        output_dir: res.output_dir,
      };
    },

    /* ---------------------------------------------------------- SKILL */
    async getSkill() {
      return get("/api/skills");
    },
  };
})();