import { HttpRequestLibrary, makeBasicAuthHeader } from "../http-common.js";
import { HttpStatusCode } from "../http-status-codes.js";
import { createPlatformHttpLib } from "../http.js";
import { FailCasesByMethod, ResultByMethod, opFixedSuccess, opKnownHttpFailure, opSuccess, opUnknownFailure } from "../operation.js";
import { LongPollParams, PaginationParams, TalerWireGatewayApi, codecForAddIncomingResponse, codecForIncomingHistory, codecForOutgoingHistory, codecForTransferResponse } from "./types.js";
import { addLongPollingParam, addPaginationParams } from "./utils.js";

export type TalerWireGatewayResultByMethod<prop extends keyof TalerWireGatewayHttpClient> = ResultByMethod<TalerWireGatewayHttpClient, prop>
export type TalerWireGatewayErrorsByMethod<prop extends keyof TalerWireGatewayHttpClient> = FailCasesByMethod<TalerWireGatewayHttpClient, prop>

/**
 * The API is used by the exchange to trigger transactions and query 
 * incoming transactions, as well as by the auditor to query incoming 
 * and outgoing transactions.
 * 
 * https://docs.taler.net/core/api-bank-wire.html
 */
export class TalerWireGatewayHttpClient {
  httpLib: HttpRequestLibrary;

  constructor(
    readonly baseUrl: string,
    readonly username: string,
    httpClient?: HttpRequestLibrary,
  ) {
    this.httpLib = httpClient ?? createPlatformHttpLib();
  }
  // public readonly PROTOCOL_VERSION = "4:0:0";
  // isCompatible(version: string): boolean {
  //   const compare = LibtoolVersion.compare(this.PROTOCOL_VERSION, version)
  //   return compare?.compatible ?? false
  // }

  // /**
  //  * https://docs.taler.net/core/api-corebank.html#config
  //  * 
  //  */
  // async getConfig() {
  //   const url = new URL(`config`, this.baseUrl);
  //   const resp = await this.httpLib.fetch(url.href, {
  //     method: "GET"
  //   });
  //   switch (resp.status) {
  //     case HttpStatusCode.Ok: return opSuccess(resp, codecForCoreBankConfig())
  //     default: return opUnknownFailure(resp, await resp.text())
  //   }
  // }


  /**
   * https://docs.taler.net/core/api-bank-wire.html#post--transfer
   * 
   */
  async transfer(auth: string, body: TalerWireGatewayApi.TransferRequest,
  ) {
    const url = new URL(`transfer`, this.baseUrl);
    const resp = await this.httpLib.fetch(url.href, {
      method: "POST",
      headers: {
        Authorization: makeBasicAuthHeader(this.username, auth),
      },
      body
    });
    switch (resp.status) {
      case HttpStatusCode.Ok: return opSuccess(resp, codecForTransferResponse())
      //FIXME: show more details in docs
      case HttpStatusCode.BadRequest: return opKnownHttpFailure(resp.status, resp);
      case HttpStatusCode.Unauthorized: return opKnownHttpFailure(resp.status, resp);
      //FIXME: show more details in docs
      case HttpStatusCode.NotFound: return opKnownHttpFailure(resp.status, resp);
      case HttpStatusCode.Conflict: return opKnownHttpFailure(resp.status, resp);
      default: return opUnknownFailure(resp, await resp.text())
    }
  }

  /**
   * https://docs.taler.net/core/api-bank-wire.html#get--history-incoming
   * 
   */
  async getHistoryIncoming(auth: string, params?: PaginationParams & LongPollParams) {
    const url = new URL(`history/incoming`, this.baseUrl);
    addPaginationParams(url, params)
    addLongPollingParam(url, params)
    const resp = await this.httpLib.fetch(url.href, {
      method: "GET",
      headers: {
        Authorization: makeBasicAuthHeader(this.username, auth),
      }
    });
    switch (resp.status) {
      case HttpStatusCode.Ok: return opSuccess(resp, codecForIncomingHistory())
      //FIXME: account should not be returned or make it optional
      case HttpStatusCode.NoContent: return opFixedSuccess({ incoming_transactions: [], credit_account: undefined })
      //FIXME: show more details in docs
      case HttpStatusCode.BadRequest: return opKnownHttpFailure(resp.status, resp);
      case HttpStatusCode.Unauthorized: return opKnownHttpFailure(resp.status, resp);
      //FIXME: show more details in docs
      case HttpStatusCode.NotFound: return opKnownHttpFailure(resp.status, resp);
      default: return opUnknownFailure(resp, await resp.text())
    }
  }

  /**
   * https://docs.taler.net/core/api-bank-wire.html#get--history-outgoing
   * 
   */
  async getHistoryOutgoing(auth: string, params?: PaginationParams & LongPollParams) {
    const url = new URL(`history/outgoing`, this.baseUrl);
    addPaginationParams(url, params)
    addLongPollingParam(url, params)
    const resp = await this.httpLib.fetch(url.href, {
      method: "GET",
      headers: {
        Authorization: makeBasicAuthHeader(this.username, auth),
      }
    });
    switch (resp.status) {
      case HttpStatusCode.Ok: return opSuccess(resp, codecForOutgoingHistory())
      //FIXME: account should not be returned or make it optional
      case HttpStatusCode.NoContent: return opFixedSuccess({ outgoing_transactions: [], debit_account: undefined })
      //FIXME: show more details in docs
      case HttpStatusCode.BadRequest: return opKnownHttpFailure(resp.status, resp);
      case HttpStatusCode.Unauthorized: return opKnownHttpFailure(resp.status, resp);
      //FIXME: show more details in docs
      case HttpStatusCode.NotFound: return opKnownHttpFailure(resp.status, resp);
      default: return opUnknownFailure(resp, await resp.text())
    }
  }

  /**
   * https://docs.taler.net/core/api-bank-wire.html#post--admin-add-incoming
   * 
   */
  async addIncoming(auth: string, body: TalerWireGatewayApi.AddIncomingRequest,) {
    const url = new URL(`admin/add-incoming`, this.baseUrl);
    const resp = await this.httpLib.fetch(url.href, {
      method: "POST",
      headers: {
        Authorization: makeBasicAuthHeader(this.username, auth),
      },
      body
    });
    switch (resp.status) {
      case HttpStatusCode.Ok: return opSuccess(resp, codecForAddIncomingResponse())
      //FIXME: show more details in docs
      case HttpStatusCode.BadRequest: return opKnownHttpFailure(resp.status, resp);
      case HttpStatusCode.Unauthorized: return opKnownHttpFailure(resp.status, resp);
      //FIXME: show more details in docs
      case HttpStatusCode.NotFound: return opKnownHttpFailure(resp.status, resp);
      case HttpStatusCode.Conflict: return opKnownHttpFailure(resp.status, resp);
      default: return opUnknownFailure(resp, await resp.text())
    }
  }
}