import {
  ApiPath,
  DEFAULT_API_HOST,
  ServiceProvider,
  StoreKey,
} from "../constant";
import { getHeaders } from "../client/api";
import { getClientConfig, getFullApi } from "../config/client";
import { createPersistStore } from "../utils/store";
import { ensure } from "../utils/clone";
import dayjs from "dayjs";

let fetchState = 0; // 0 not fetch, 1 fetching, 2 done

const DEFAULT_OPENAI_URL =
  getClientConfig()?.buildMode === "export" ? DEFAULT_API_HOST : ApiPath.OpenAI;

const DEFAULT_ACCESS_STATE = {
  accessCode: "",
  useCustomConfig: false,

  provider: ServiceProvider.Oauth,

  // openai
  openaiUrl: DEFAULT_OPENAI_URL,
  openaiApiKey: "",

  // oauth2
  accessToken: "",
  expiresIn: 0,
  tokenType: "bearer",
  hasLogin: false,

  // azure
  azureUrl: "",
  azureApiKey: "",
  azureApiVersion: "2023-08-01-preview",

  // server config
  needCode: true,
  hideUserApiKey: false,
  hideBalanceQuery: false,
  disableGPT4: false,
  disableFastLink: false,
  customModels: "",
};

export const useAccessStore = createPersistStore(
  { ...DEFAULT_ACCESS_STATE },

  (set, get) => ({
    enabledAccessControl() {
      this.fetch();

      return get().needCode;
    },

    clearToken() {
      set(() => ({
        accessToken: "",
        expiresIn: 0,
        tokenType: "bearer",
        hasLogin: false,
      }));
    },

    setAccessToken(token: any) {
      set(() => ({ ...token }));
    },

    setLogin(login = true) {
      set(() => ({ hasLogin: login }));
    },
    isLogin() {
      return get().hasLogin;
    },

    hasAccessToken() {
      const state = get();
      if (state.provider == ServiceProvider.Oauth) {
        return !!state.accessToken?.length && dayjs().unix() < state.expiresIn;
      }
      return false;
    },

    isValidOpenAI() {
      return ensure(get(), ["openaiApiKey"]);
    },

    isValidAzure() {
      return ensure(get(), ["azureUrl", "azureApiKey", "azureApiVersion"]);
    },

    isAuthorized() {
      this.fetch();

      // has token or has code or disabled access control
      return (
        this.isValidOpenAI() ||
        this.isValidAzure() ||
        !this.enabledAccessControl() ||
        (this.enabledAccessControl() && ensure(get(), ["accessCode"]))
      );
    },
    fetch() {
      if (fetchState > 0 || getClientConfig()?.buildMode === "export") return;
      fetchState = 1;
      fetch(getFullApi("/api/config"), {
        method: "post",
        body: null,
        headers: {
          ...getHeaders(),
        },
      })
        .then((res) => res.json())
        .then((res: DangerConfig) => {
          console.log("[Config] got config from server", res);
          set(() => ({ ...res }));
        })
        .catch(() => {
          console.error("[Config] failed to fetch config");
        })
        .finally(() => {
          fetchState = 2;
        });
    },
  }),
  {
    name: StoreKey.Access,
    version: 2,
    migrate(persistedState, version) {
      if (version < 2) {
        const state = persistedState as {
          token: string;
          openaiApiKey: string;
          azureApiVersion: string;
        };
        state.openaiApiKey = state.token;
        state.azureApiVersion = "2023-08-01-preview";
      }

      return persistedState as any;
    },
  },
);