import ky from "ky";
import { isArray, isEmpty } from "lodash-es";

export type ValidResponse = {
  result: true;
};

export type APIRecoveryType = "login" | "2fa" | "gateway" | "game_login" | "game_quota";
export const APIRecoveryConst = {
    Login: 'login',
    TwoFactorAuth: '2fa',
    Gateway: 'gateway',
    GameLogin: 'game_login',
    GameQuota: 'game_quota',
} as const;

export type InvalidResponse = {
  result: false;
  reason: string;
  recovery?: APIRecoveryType;
  recovery_arg?: string | number;
};

export type RawArgType = Record<string, unknown> | Record<string, unknown>[] | undefined;

interface BasicAPICallT<
  ArgType extends RawArgType,
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse
> {
  (args: ArgType): Promise<ResultType>;
  (args: ArgType, returnError: false): Promise<ResultType>;
  (args: ArgType, returnError: true): Promise<ResultType | ErrorType>;
}

interface EmptyAPICallT<ResultType extends ValidResponse, ErrorType extends InvalidResponse> {
  (): Promise<ResultType>;
  (args: undefined): Promise<ResultType>;
  (args: undefined, returnError: false): Promise<ResultType>;
  (args: undefined, returnError: true): Promise<ResultType | ErrorType>;
}

// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type ArgTypeOf<T> = T extends APICallT<infer A, any, any> ? A : never;

export type APICallT<
  ArgType extends RawArgType,
  ResultType extends ValidResponse = ValidResponse,
  ErrorType extends InvalidResponse = InvalidResponse
> = ArgType extends undefined ? EmptyAPICallT<ResultType, ErrorType> : BasicAPICallT<ArgType, ResultType, ErrorType>;

type HttpMethod = "get" | "post" | "put" | "patch" | "head" | "delete";
export type APITail = typeof GET | typeof POST | typeof PUT | typeof PATCH | typeof HEAD | typeof DELETE;

const httpMethodMap = new Map<APITail, HttpMethod>([
  [GET, "get"],
  [POST, "post"],
  [PUT, "put"],
  [PATCH, "patch"],
  [HEAD, "head"],
  [DELETE, "delete"],
]);

export function extractHttpMethod(tail: APITail): HttpMethod {
  return httpMethodMap.get(tail) ?? "post";
}

const apiTarget = "api.php";
let apiPath = apiTarget;

export function setSammoAPIPrefix(prefix: string) {
  apiPath = `${prefix}/${apiTarget}`;
}

export async function callSammoAPI<ResultType extends ValidResponse>(
  method: HttpMethod,
  path: string | string[],
  args: RawArgType,
  paramArgs: Record<string, string | number> | undefined
): Promise<ResultType>;
export async function callSammoAPI<ResultType extends ValidResponse>(
  method: HttpMethod,
  path: string | string[],
  args: RawArgType,
  paramArgs: Record<string, string | number> | undefined,
  returnError: false
): Promise<ResultType>;
export async function callSammoAPI<ResultType extends ValidResponse, ErrorType extends InvalidResponse>(
  method: HttpMethod,
  path: string | string[],
  args: RawArgType,
  paramArgs: Record<string, string | number> | undefined,
  returnError: true
): Promise<ResultType | ErrorType>;
export async function callSammoAPI<ResultType extends ValidResponse, ErrorType extends InvalidResponse>(
  method: HttpMethod,
  path: string | string[],
  args: RawArgType,
  paramArgs: Record<string, string | number> | undefined,
  returnError = false
): Promise<ResultType | ErrorType> {
  if (isArray(path)) {
    path = path.join("/");
  }

  if (args && isEmpty(args)) {
    args = undefined;
  }

  const result = (await (() => {
    if (method == "get") {
      return ky(apiPath, {
        searchParams: {
          ...paramArgs,
          ...(args as typeof paramArgs),
          path,
        },
        method,
        headers: {
          "content-type": "application/json",
        },
        timeout: 30000,
        retry: 0,
      });
    }
    return ky("api.php", {
      searchParams: {
        ...paramArgs,
        path,
      },
      method,
      json: args,
      headers: {
        "content-type": "application/json",
      },
      timeout: 30000,
      retry: 0,
    });
  })().json()) as ErrorType | ResultType;

  if (!result.result) {
    if (returnError) {
      return result;
    }
    throw result.reason;
  }
  return result;
}

export async function GET<ResultType extends ValidResponse, ArgType extends undefined = undefined>(
  args?: ArgType
): Promise<ResultType>;
export async function GET<ResultType extends ValidResponse, ArgType extends undefined = undefined>(
  args: ArgType | undefined,
  returnError: false
): Promise<ResultType>;
export async function GET<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends undefined = undefined
>(args: ArgType | undefined, returnError: true): Promise<ResultType | ErrorType>;
export async function GET<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends undefined = undefined
>(args?: ArgType, returnError = false): Promise<ResultType | ErrorType> {
  console.error(`Can't directly call GET. ${args}, ${returnError}. Use auto-generated path API.`);
  return callSammoAPI<ResultType, ErrorType>("get", [], args, undefined, true);
}

export async function POST<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args?: ArgType
): Promise<ResultType>;
export async function POST<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args: ArgType | undefined,
  returnError: false
): Promise<ResultType>;
export async function POST<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args: ArgType | undefined, returnError: true): Promise<ResultType | ErrorType>;
export async function POST<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args?: ArgType, returnError = false): Promise<ResultType | ErrorType> {
  console.error(`Can't directly call POST. ${args}, ${returnError}. Use auto-generated path API.`);
  return callSammoAPI<ResultType, ErrorType>("post", [], args, undefined, true);
}

export async function PUT<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args?: ArgType
): Promise<ResultType>;
export async function PUT<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args: ArgType | undefined,
  returnError: false
): Promise<ResultType>;
export async function PUT<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args: ArgType | undefined, returnError: true): Promise<ResultType | ErrorType>;
export async function PUT<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args?: ArgType, returnError = false): Promise<ResultType | ErrorType> {
  console.error(`Can't directly call PUT. ${args}, ${returnError}. Use auto-generated path API.`);
  return callSammoAPI<ResultType, ErrorType>("put", [], args, undefined, true);
}

export async function PATCH<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args?: ArgType
): Promise<ResultType>;
export async function PATCH<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args: ArgType | undefined,
  returnError: false
): Promise<ResultType>;
export async function PATCH<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args: ArgType | undefined, returnError: true): Promise<ResultType | ErrorType>;
export async function PATCH<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args?: ArgType, returnError = false): Promise<ResultType | ErrorType> {
  console.error(`Can't directly call PATCH. ${args}, ${returnError}. Use auto-generated path API.`);
  return callSammoAPI<ResultType, ErrorType>("patch", [], args, undefined, true);
}

export async function HEAD<ResultType extends ValidResponse, ArgType extends undefined = undefined>(
  args?: ArgType
): Promise<ResultType>;
export async function HEAD<ResultType extends ValidResponse, ArgType extends undefined = undefined>(
  args: ArgType | undefined,
  returnError: false
): Promise<ResultType>;
export async function HEAD<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends undefined = undefined
>(args: ArgType | undefined, returnError: true): Promise<ResultType | ErrorType>;
export async function HEAD<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends undefined = undefined
>(args?: ArgType, returnError = false): Promise<ResultType | ErrorType> {
  console.error(`Can't directly call HEAD. ${args}, ${returnError}. Use auto-generated path API.`);
  return callSammoAPI<ResultType, ErrorType>("head", [], args, undefined, true);
}

export async function DELETE<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args?: ArgType
): Promise<ResultType>;
export async function DELETE<ResultType extends ValidResponse, ArgType extends RawArgType = RawArgType>(
  args: ArgType | undefined,
  returnError: false
): Promise<ResultType>;
export async function DELETE<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args: ArgType | undefined, returnError: true): Promise<ResultType | ErrorType>;
export async function DELETE<
  ResultType extends ValidResponse,
  ErrorType extends InvalidResponse,
  ArgType extends RawArgType = RawArgType
>(args?: ArgType, returnError = false): Promise<ResultType | ErrorType> {
  console.error(`Can't directly call DELETE. ${args}, ${returnError}. Use auto-generated path API.`);
  return callSammoAPI<ResultType, ErrorType>("patch", [], args, undefined, true);
}