/*
  This file is part of TALER
  Copyright (C) 2014-2023 Taler Systems SA

  TALER is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 3, or
  (at your option) any later version.

  TALER is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public
  License along with TALER; see the file COPYING.  If not, see
  <http://www.gnu.org/licenses/>
*/
/**
 * @file test_kyc_api.c
 * @brief testcase to test exchange's HTTP API interface
 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
 * @author Christian Grothoff
 * @author Marcello Stanisci
 */
#include "platform.h"
#include <taler/taler_util.h>
#include <taler/taler_signatures.h>
#include <taler/taler_exchange_service.h>
#include <taler/taler_json_lib.h>
#include <gnunet/gnunet_util_lib.h>
#include <microhttpd.h>
#include <taler/taler_bank_service.h>
#include <taler/taler_fakebank_lib.h>
#include <taler/taler_testing_lib.h>
#include <taler/taler_error_codes.h>
#include "taler_merchant_testing_lib.h"


/**
 * Configuration file we use.  One (big) configuration is used
 * for the various components for this test.
 */
#define CONFIG_FILE "test_kyc_api.conf"

/**
 * Exchange base URL.  Could also be taken from config.
 */
#define EXCHANGE_URL "http://localhost:8081/"

/**
 * Payto URI of the customer (payer).
 */
static const char *payer_payto;

/**
 * Payto URI of the exchange (escrow account).
 */
static const char *exchange_payto;

/**
 * Payto URI of the merchant (receiver).
 */
static const char *merchant_payto;

/**
 * Credentials for the test.
 */
static struct TALER_TESTING_Credentials cred;

/**
 * Merchant base URL.
 */
static const char *merchant_url;

/**
 * Merchant instance "i1a" base URL.
 */
static char *merchant_url_i1a;

/**
 * Account number of the exchange at the bank.
 */
#define EXCHANGE_ACCOUNT_NAME "2"

/**
 * Account number of some user.
 */
#define USER_ACCOUNT_NAME "62"

/**
 * Account number used by the merchant
 */
#define MERCHANT_ACCOUNT_NAME "3"


/**
 * Execute the taler-exchange-aggregator and transfer commands with
 * our configuration file.
 *
 * @param label label to use for the command.
 */
#define CMD_EXEC_AGGREGATOR(label) \
  TALER_TESTING_cmd_exec_aggregator_with_kyc (label "-aggregator", CONFIG_FILE), \
  TALER_TESTING_cmd_exec_transfer (label "-transfer", CONFIG_FILE)


/**
 * Run wire transfer of funds from some user's account to the
 * exchange.
 *
 * @param label label to use for the command.
 * @param amount amount to transfer, i.e. "EUR:1"
 * @param url exchange_url
 */
static struct TALER_TESTING_Command
cmd_transfer_to_exchange (const char *label,
                          const char *amount)
{
  return TALER_TESTING_cmd_admin_add_incoming (label,
                                               amount,
                                               &cred.ba,
                                               payer_payto);
}


/**
 * Main function that will tell the interpreter what commands to
 * run.
 *
 * @param cls closure
 */
static void
run (void *cls,
     struct TALER_TESTING_Interpreter *is)
{
  struct TALER_TESTING_Command pay[] = {
    /**
     * Move money to the exchange's bank account.
     */
    cmd_transfer_to_exchange (
      "create-reserve-1",
      "EUR:10.02"),
    /**
     * Make a reserve exist, according to the previous transfer.
     */
    TALER_TESTING_cmd_exec_wirewatch (
      "wirewatch-1",
      CONFIG_FILE),
    TALER_TESTING_cmd_check_bank_admin_transfer (
      "check_bank_transfer-2",
      "EUR:10.02",
      payer_payto,
      exchange_payto,
      "create-reserve-1"),
    TALER_TESTING_cmd_withdraw_amount (
      "withdraw-coin-1",
      "create-reserve-1",
      "EUR:5",
      0,
      MHD_HTTP_OK),
    TALER_TESTING_cmd_withdraw_amount (
      "withdraw-coin-2",
      "create-reserve-1",
      "EUR:5",
      0,
      MHD_HTTP_OK),
    TALER_TESTING_cmd_merchant_get_orders (
      "get-orders-empty",
      merchant_url,
      MHD_HTTP_OK,
      NULL),
    /**
     * Check the reserve is depleted.
     */
    TALER_TESTING_cmd_status (
      "withdraw-status-1",
      "create-reserve-1",
      "EUR:0",
      MHD_HTTP_OK),
    TALER_TESTING_cmd_merchant_post_orders2 (
      "create-proposal-1",
      cred.cfg,
      merchant_url,
      MHD_HTTP_OK,
      "1",     /* order ID */
      GNUNET_TIME_UNIT_ZERO_TS,
      GNUNET_TIME_UNIT_FOREVER_TS,
      true,
      "EUR:5.0",
      "x-taler-bank",
      "",
      "",
      NULL),
    TALER_TESTING_cmd_merchant_claim_order (
      "reclaim-1",
      merchant_url,
      MHD_HTTP_OK,
      "create-proposal-1",
      NULL),
    TALER_TESTING_cmd_merchant_pay_order (
      "deposit-simple",
      merchant_url,
      MHD_HTTP_OK,
      "create-proposal-1",
      "withdraw-coin-1",
      "EUR:5",
      "EUR:4.99",
      "session-0"),
    TALER_TESTING_cmd_merchant_post_orders_paid (
      "verify-order-1-paid",
      merchant_url,
      "deposit-simple",
      "session-1",
      MHD_HTTP_OK),
    TALER_TESTING_cmd_check_bank_empty (
      "check_bank_empty-1"),
    CMD_EXEC_AGGREGATOR (
      "run-aggregator"),
    /* KYC: hence nothing happened at the bank yet: */
    TALER_TESTING_cmd_check_bank_empty (
      "check_bank_empty-2"),
    /* KYC: we don't even know the legitimization UUID yet */
    TALER_TESTING_cmd_merchant_kyc_get (
      "kyc-pending-early",
      merchant_url,
      NULL,
      NULL,
      EXCHANGE_URL,
      MHD_HTTP_NO_CONTENT,
      TALER_AML_NORMAL),
    /* now we get the legi UUID by running taler-merchant-depositcheck */
    TALER_TESTING_cmd_depositcheck (
      "deposit-check",
      CONFIG_FILE),
    /* Now we should get a status of pending */
    TALER_TESTING_cmd_merchant_kyc_get (
      "kyc-pending",
      merchant_url,
      NULL,
      NULL,
      EXCHANGE_URL,
      MHD_HTTP_ACCEPTED,
      TALER_AML_NORMAL),
    TALER_TESTING_cmd_proof_kyc_oauth2 (
      "kyc-do",
      "kyc-pending",
      "kyc-provider-test-oauth2",
      "pass",
      MHD_HTTP_SEE_OTHER),
    CMD_EXEC_AGGREGATOR ("run-aggregator"),
    TALER_TESTING_cmd_check_bank_transfer (
      "check_bank_transfer-498c",
      EXCHANGE_URL,
      "EUR:4.98",
      exchange_payto,
      merchant_payto),
    TALER_TESTING_cmd_merchant_post_transfer (
      "post-transfer-1",
      &cred.ba,
      merchant_payto,
      merchant_url,
      "EUR:4.98",
      MHD_HTTP_NO_CONTENT,
      "deposit-simple",
      NULL),
    TALER_TESTING_cmd_run_tme (
      "run taler-merchant-exchange-1",
      CONFIG_FILE),
    TALER_TESTING_cmd_merchant_get_transfers (
      "get-transfers-1",
      merchant_url,
      merchant_payto,
      MHD_HTTP_OK,
      "post-transfer-1",
      NULL),
    TALER_TESTING_cmd_check_bank_empty (
      "check_bank_empty-3"),
    TALER_TESTING_cmd_end ()
  };
  struct TALER_TESTING_Command aml[] = {
    TALER_TESTING_cmd_set_officer (
      "aml-officer",
      NULL,
      "Ernest&Young",
      true,
      false),
    cmd_transfer_to_exchange (
      "create-reserve-big",
      "EUR:100.02"),
    TALER_TESTING_cmd_exec_wirewatch (
      "wirewatch-big",
      CONFIG_FILE),
    TALER_TESTING_cmd_take_aml_decision (
      "freeze",
      "aml-officer",
      "post-transfer-1",
      "EUR:1",
      "suspicious",
      TALER_AML_FROZEN,
      NULL,
      MHD_HTTP_NO_CONTENT),
    TALER_TESTING_cmd_check_bank_admin_transfer (
      "check_bank_transfer-big",
      "EUR:100.02",
      payer_payto,
      exchange_payto,
      "create-reserve-big"),
    TALER_TESTING_cmd_withdraw_amount (
      "withdraw-coin-aml",
      "create-reserve-big",
      "EUR:5",
      0,
      MHD_HTTP_OK),
    TALER_TESTING_cmd_merchant_post_orders2 (
      "create-proposal-aml",
      cred.cfg,
      merchant_url,
      MHD_HTTP_OK,
      "10-aml",                                        /* order ID */
      GNUNET_TIME_UNIT_ZERO_TS,
      GNUNET_TIME_UNIT_FOREVER_TS,
      true,
      "EUR:5.0",
      "x-taler-bank",
      "",
      "",
      NULL),
    TALER_TESTING_cmd_merchant_claim_order (
      "reclaim-aml",
      merchant_url,
      MHD_HTTP_OK,
      "create-proposal-aml",
      NULL),
    TALER_TESTING_cmd_merchant_pay_order (
      "deposit-simple",
      merchant_url,
      MHD_HTTP_OK,
      "create-proposal-aml",
      "withdraw-coin-aml",
      "EUR:5",
      "EUR:4.99",
      "session-aml"),
    TALER_TESTING_cmd_merchant_post_orders_paid (
      "verify-order-aml-paid",
      merchant_url,
      "deposit-simple",
      "session-aml",
      MHD_HTTP_OK),
    TALER_TESTING_cmd_check_bank_empty (
      "check_bank_empty-aml-1"),
    CMD_EXEC_AGGREGATOR ("run-aggregator-aml-frozen"),
    /* AML-frozen: hence nothing happened at the bank yet: */
    TALER_TESTING_cmd_check_bank_empty (
      "check_bank_empty-aml-2"),
    /* Now we should get a status of frozen */
    TALER_TESTING_cmd_merchant_kyc_get (
      "aml-frozen",
      merchant_url,
      NULL,     /* no instance ID */
      NULL,     /* no wire ref */
      EXCHANGE_URL,
      MHD_HTTP_ACCEPTED,
      TALER_AML_FROZEN),
    TALER_TESTING_cmd_sleep (
      "sleep to de-collide AML timestamps",
      1),
    TALER_TESTING_cmd_take_aml_decision (
      "unfreeze",
      "aml-officer",
      "post-transfer-1",
      "EUR:100",
      "fine",
      TALER_AML_NORMAL,
      NULL,
      MHD_HTTP_NO_CONTENT),
    TALER_TESTING_cmd_merchant_kyc_get (
      "aml-unfrozen",
      merchant_url,
      NULL,     /* no instance ID */
      NULL,     /* no wire ref */
      EXCHANGE_URL,
      MHD_HTTP_NO_CONTENT,
      TALER_AML_NORMAL),
    CMD_EXEC_AGGREGATOR ("run-aggregator-aml-normal"),
    TALER_TESTING_cmd_check_bank_transfer (
      "check_bank_transfer-498c-post-unfreeze",
      EXCHANGE_URL,
      "EUR:4.98",
      exchange_payto,
      merchant_payto),
    TALER_TESTING_cmd_merchant_post_transfer (
      "post-transfer-aml",
      &cred.ba,
      merchant_payto,
      merchant_url,
      "EUR:4.98",
      MHD_HTTP_NO_CONTENT,
      "deposit-simple",
      NULL),
    TALER_TESTING_cmd_run_tme (
      "run taler-merchant-exchange-2-aml",
      CONFIG_FILE),
    TALER_TESTING_cmd_merchant_get_transfers (
      "get-transfers-aml",
      merchant_url,
      merchant_payto,
      MHD_HTTP_OK,
      "post-transfer-1",
      "post-transfer-aml",
      NULL),
    TALER_TESTING_cmd_end ()
  }; /* end of aml batch */

  struct TALER_TESTING_Command commands[] = {
    /* general setup */
    TALER_TESTING_cmd_run_fakebank (
      "run-fakebank",
      cred.cfg,
      "exchange-account-exchange"),
    TALER_TESTING_cmd_system_start (
      "start-taler",
      CONFIG_FILE,
      "-ema",
      "-u", "exchange-account-exchange",
      NULL),
    TALER_TESTING_cmd_get_exchange (
      "get-exchange",
      cred.cfg,
      NULL,
      true,
      true),
    TALER_TESTING_cmd_oauth (
      "start-oauth-service",
      6666),
    TALER_TESTING_cmd_merchant_post_instances (
      "instance-create-default-setup",
      merchant_url,
      "default",
      MHD_HTTP_NO_CONTENT),
    TALER_TESTING_cmd_merchant_post_account (
      "instance-create-default-account",
      merchant_url,
      merchant_payto,
      NULL, NULL,
      MHD_HTTP_OK),
    TALER_TESTING_cmd_batch ("pay",
                             pay),
    TALER_TESTING_cmd_batch ("aml",
                             aml),
    TALER_TESTING_cmd_end ()
  };

  TALER_TESTING_run (is,
                     commands);
}


int
main (int argc,
      char *const *argv)
{
  payer_payto =
    "payto://x-taler-bank/localhost/" USER_ACCOUNT_NAME "?receiver-name="
    USER_ACCOUNT_NAME;
  exchange_payto =
    "payto://x-taler-bank/localhost/" EXCHANGE_ACCOUNT_NAME "?receiver-name="
    EXCHANGE_ACCOUNT_NAME;
  merchant_payto =
    "payto://x-taler-bank/localhost/" MERCHANT_ACCOUNT_NAME "?receiver-name="
    MERCHANT_ACCOUNT_NAME;
  merchant_url = "http://localhost:8080/";
  GNUNET_asprintf (&merchant_url_i1a,
                   "%sinstances/i1a/",
                   merchant_url);
  return TALER_TESTING_main (argv,
                             "INFO",
                             CONFIG_FILE,
                             "exchange-account-exchange",
                             TALER_TESTING_BS_FAKEBANK,
                             &cred,
                             &run,
                             NULL);
}


/* end of test_kyc_api.c */