import { http, HttpResponse } from "msw";
import type { AppType } from "@/lib/api/types";
import type { Provider } from "@/types";
import {
  addProvider,
  deleteProvider,
  getCurrentProviderId,
  getProviders,
  listProviders,
  resetProviderState,
  setCurrentProviderId,
  updateProvider,
  updateSortOrder,
} from "./state";

const TAURI_ENDPOINT = "http://tauri.local";

const withJson = async <T>(request: Request): Promise<T> => {
  try {
    const body = await request.text();
    if (!body) return {} as T;
    return JSON.parse(body) as T;
  } catch {
    return {} as T;
  }
};

const success = <T>(payload: T) => HttpResponse.json(payload as any);

export const handlers = [
  http.post(`${TAURI_ENDPOINT}/get_providers`, async ({ request }) => {
    const { app_type } = await withJson<{ app_type: AppType }>(request);
    return success(getProviders(app_type));
  }),

  http.post(`${TAURI_ENDPOINT}/get_current_provider`, async ({ request }) => {
    const { app_type } = await withJson<{ app_type: AppType }>(request);
    return success(getCurrentProviderId(app_type));
  }),

  http.post(`${TAURI_ENDPOINT}/update_providers_sort_order`, async ({ request }) => {
    const { updates = [], app_type } = await withJson<{
      updates: { id: string; sortIndex: number }[];
      app_type: AppType;
    }>(request);
    updateSortOrder(app_type, updates);
    return success(true);
  }),

  http.post(`${TAURI_ENDPOINT}/update_tray_menu`, () => success(true)),

  http.post(`${TAURI_ENDPOINT}/switch_provider`, async ({ request }) => {
    const { id, app_type } = await withJson<{ id: string; app_type: AppType }>(
      request,
    );
    const providers = listProviders(app_type);
    if (!providers[id]) {
      return HttpResponse.json(false, { status: 404 });
    }
    setCurrentProviderId(app_type, id);
    return success(true);
  }),

  http.post(`${TAURI_ENDPOINT}/add_provider`, async ({ request }) => {
    const { provider, app_type } = await withJson<{
      provider: Provider & { id?: string };
      app_type: AppType;
    }>(request);

    const newId = provider.id ?? `mock-${Date.now()}`;
    addProvider(app_type, { ...provider, id: newId });
    return success(true);
  }),

  http.post(`${TAURI_ENDPOINT}/update_provider`, async ({ request }) => {
    const { provider, app_type } = await withJson<{
      provider: Provider;
      app_type: AppType;
    }>(request);
    updateProvider(app_type, provider);
    return success(true);
  }),

  http.post(`${TAURI_ENDPOINT}/delete_provider`, async ({ request }) => {
    const { id, app_type } = await withJson<{ id: string; app_type: AppType }>(
      request,
    );
    deleteProvider(app_type, id);
    return success(true);
  }),

  http.post(`${TAURI_ENDPOINT}/import_default_config`, async () => {
    resetProviderState();
    return success(true);
  }),

  http.post(`${TAURI_ENDPOINT}/open_external`, () => success(true)),

  http.post(`${TAURI_ENDPOINT}/restart_app`, () => success(true)),
];