// Copyright 2017-2021 DERO Project. All rights reserved.
// Use of this source code in any form is governed by RESEARCH license.
// license can be found in the LICENSE file.
// GPG: 0F39 E425 8C65 3947 702A  8234 08B2 0360 A03A 9DE8
//
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package main

import "io"
import "os"
import "fmt"
import "io/ioutil"
import "strings"
import "path/filepath"
import "encoding/hex"

import "github.com/chzyer/readline"

import "github.com/deroproject/derohe/globals"
import "github.com/deroproject/derohe/address"

//import "github.com/deroproject/derohe/walletapi"
import "github.com/deroproject/derohe/transaction"

// handle menu if a wallet is currently opened
func display_easymenu_post_open_command(l *readline.Instance) {
	w := l.Stderr()
	io.WriteString(w, "Menu:\n")

	io.WriteString(w, "\t\033[1m1\033[0m\tDisplay account Address \n")
	io.WriteString(w, "\t\033[1m2\033[0m\tDisplay Seed "+color_red+"(Please save seed in safe location)\n\033[0m")

	io.WriteString(w, "\t\033[1m3\033[0m\tDisplay Keys (hex)\n")

	if !is_registered(wallet) {
		io.WriteString(w, "\t\033[1m4\033[0m\tAccount registration to blockchain (registration has no fee requirement and is precondition to use the account)\n")
		io.WriteString(w, "\n")
		io.WriteString(w, "\n")
	} else { // hide some commands, if view only wallet
		io.WriteString(w, "\n")
		io.WriteString(w, "\t\033[1m5\033[0m\tTransfer (send  DERO) To Another Wallet\n")
		//io.WriteString(w, "\t\033[1m6\033[0m\tCreate Transaction in offline mode\n")
		io.WriteString(w, "\n")
	}

	io.WriteString(w, "\t\033[1m7\033[0m\tChange wallet password\n")
	io.WriteString(w, "\t\033[1m8\033[0m\tClose Wallet\n")
	if is_registered(wallet) {
		io.WriteString(w, "\t\033[1m12\033[0m\tTransfer all balance (send  DERO) To Another Wallet\n")
		io.WriteString(w, "\t\033[1m13\033[0m\tShow transaction history\n")
		io.WriteString(w, "\t\033[1m14\033[0m\tRescan transaction history\n")
	}

	io.WriteString(w, "\n\t\033[1m9\033[0m\tExit menu and start prompt\n")
	io.WriteString(w, "\t\033[1m0\033[0m\tExit Wallet\n")

}

// this handles all the commands if wallet in menu mode  and a wallet is opened
func handle_easymenu_post_open_command(l *readline.Instance, line string) (processed bool) {

	var err error
	_ = err
	line = strings.TrimSpace(line)
	line_parts := strings.Fields(line)
	processed = true

	if len(line_parts) < 1 { // if no command return
		return
	}

	command := ""
	if len(line_parts) >= 1 {
		command = strings.ToLower(line_parts[0])
	}

	offline_tx := false
	_ = offline_tx
	switch command {
	case "1":
		fmt.Fprintf(l.Stderr(), "Wallet address : "+color_green+"%s"+color_white+"\n", wallet.GetAddress())

		if !is_registered(wallet) {
			reg_tx := wallet.GetRegistrationTX()
			fmt.Fprintf(l.Stderr(), "Registration TX : "+color_green+"%x"+color_white+"\n", reg_tx.Serialize())
		}
		PressAnyKey(l, wallet)

	case "2": // give user his seed
		if !ValidateCurrentPassword(l, wallet) {
			globals.Logger.Warnf("Invalid password")
			PressAnyKey(l, wallet)
			break
		}
		display_seed(l, wallet) // seed should be given only to authenticated users
		PressAnyKey(l, wallet)

	case "3": // give user his keys in hex form

		if !ValidateCurrentPassword(l, wallet) {
			globals.Logger.Warnf("Invalid password")
			PressAnyKey(l, wallet)
			break
		}

		display_spend_key(l, wallet)
		PressAnyKey(l, wallet)

	case "4": // Registration

		if !ValidateCurrentPassword(l, wallet) {
			globals.Logger.Warnf("Invalid password")
			PressAnyKey(l, wallet)
			break
		}

		//if valid_registration_or_display_error(l, wallet) {
		//	globals.Logger.Warnf("This wallet address is already registered.")
		//	break
		//}
		fmt.Fprintf(l.Stderr(), "Wallet address : "+color_green+"%s"+color_white+" is going to be registered.This is a pre-condition for using the online chain.It will take few seconds to register/", wallet.GetAddress())

		reg_tx := wallet.GetRegistrationTX()

		if ConfirmYesNoDefaultNo(l, "Confirm Registration (y/N)") {
			// at this point we must send the registration transaction

			fmt.Fprintf(l.Stderr(), "Wallet address : "+color_green+"%s"+color_white+" is going to be registered.Pls wait till the account is registered.", wallet.GetAddress())

			wallet.SendTransaction(reg_tx)

		}

	case "6":
		offline_tx = true
		fallthrough
	case "5":
		if !valid_registration_or_display_error(l, wallet) {
			break
		}
		if !ValidateCurrentPassword(l, wallet) {
			globals.Logger.Warnf("Invalid password")
			break
		}

		// a , amount_to_transfer, err := collect_transfer_info(l,wallet)
		a, err := ReadAddress(l)
		if err != nil {
			globals.Logger.Warnf("Err :%s", err)
			break
		}

		amount_str := read_line_with_prompt(l, fmt.Sprintf("Enter amount to transfer in DERO (max TODO .00004 hard coded): "))

		if amount_str == "" {
			amount_str = ".00009"
		}
		amount_to_transfer, err := globals.ParseAmount(amount_str)
		if err != nil {
			globals.Logger.Warnf("Err :%s", err)
			break // invalid amount provided, bail out
		}

		var payment_id []byte
		_ = payment_id
		// if user provided an integrated address donot ask him payment id
		if a.IsIntegratedAddress() {
			globals.Logger.Infof("Payment ID is integreted in address ID:%x", a.PaymentID)
		}

		if ConfirmYesNoDefaultNo(l, "Confirm Transaction (y/N)") {
			addr_list := []address.Address{*a}
			amount_list := []uint64{amount_to_transfer} // transfer 50 dero, 2 dero
			fees_per_kb := uint64(0)                    // fees  must be calculated by walletapi
			tx, err := wallet.Transfer(addr_list, amount_list, 0, hex.EncodeToString(payment_id), fees_per_kb, 0, false)
			if err != nil {
				globals.Logger.Warnf("Error while building Transaction err %s\n", err)
				break
			}
			build_relay_transaction(l, tx, err, offline_tx, amount_list)
		}

	case "12":
		if !valid_registration_or_display_error(l, wallet) {
			break
		}
		if !ValidateCurrentPassword(l, wallet) {
			globals.Logger.Warnf("Invalid password")
			break
		}

		// a , amount_to_transfer, err := collect_transfer_info(l,wallet)
		fmt.Printf("dest address %s\n", "deroi1qxqqkmaz8nhv4q07w3cjyt84kmrqnuw4nprpqfl9xmmvtvwa7cdykxq5dph4ufnx5ndq4ltraf  (14686f5e2666a4da)  dero1qxqqkmaz8nhv4q07w3cjyt84kmrqnuw4nprpqfl9xmmvtvwa7cdykxqpfpaes")
		a, err := ReadAddress(l)
		if err != nil {
			globals.Logger.Warnf("Err :%s", err)
			break
		}
		// if user provided an integrated address donot ask him payment id
		if a.IsIntegratedAddress() {
			globals.Logger.Infof("Payment ID is integreted in address ID:%x", a.PaymentID)
		}

		if ConfirmYesNoDefaultNo(l, "Confirm Transaction to send entire balance (y/N)") {

			addr_list := []address.Address{*a}
			amount_list := []uint64{0} // transfer 50 dero, 2 dero
			fees_per_kb := uint64(0)   // fees  must be calculated by walletapi
			tx, err := wallet.Transfer(addr_list, amount_list, 0, "", fees_per_kb, 0, true)
			if err != nil {
				globals.Logger.Warnf("Error while building Transaction err %s\n", err)
				break
			}

			build_relay_transaction(l, tx, err, offline_tx, amount_list)
		}

		//PressAnyKey(l, wallet) // wait for a key press

	case "7": // change password
		if ConfirmYesNoDefaultNo(l, "Change wallet password (y/N)") &&
			ValidateCurrentPassword(l, wallet) {

			new_password := ReadConfirmedPassword(l, "Enter new password", "Confirm password")
			err = wallet.Set_Encrypted_Wallet_Password(new_password)
			if err == nil {
				globals.Logger.Infof("Wallet password successfully changed")
			} else {
				globals.Logger.Warnf("Wallet password could not be changed err %s", err)
			}
		}

	case "8": // close and discard user key

		wallet.Close_Encrypted_Wallet()
		prompt_mutex.Lock()
		wallet = nil // overwrite previous instance
		prompt_mutex.Unlock()

		fmt.Fprintf(l.Stderr(), color_yellow+"Wallet closed"+color_white)

	case "9": // enable prompt mode
		menu_mode = false
		globals.Logger.Infof("Prompt mode enabled, type \"menu\" command to start menu mode")

	case "0", "bye", "exit", "quit":
		wallet.Close_Encrypted_Wallet() // save the wallet
		prompt_mutex.Lock()
		wallet = nil
		globals.Exit_In_Progress = true
		prompt_mutex.Unlock()
		fmt.Fprintf(l.Stderr(), color_yellow+"Wallet closed"+color_white)
		fmt.Fprintf(l.Stderr(), color_yellow+"Exiting"+color_white)

	case "13":
		show_transfers(l, wallet, 100)

	case "14":
		globals.Logger.Infof("Rescanning wallet history")
		rescan_bc(wallet)

	default:
		processed = false // just loop

	}
	return
}

// handles the output after building tx, takes feedback, confirms or relays tx
func build_relay_transaction(l *readline.Instance, tx *transaction.Transaction, err error, offline_tx bool, amount_list []uint64) {

	if err != nil {
		globals.Logger.Warnf("Error while building Transaction err %s\n", err)
		return
	}
	amount := uint64(0)
	for i := range amount_list {
		amount += amount_list[i]
	}
	globals.Logger.Infof("Transfering total amount %s DERO", globals.FormatMoney(amount))

	globals.Logger.Infof("fees %s DERO", globals.FormatMoney(tx.Statement.Fees))
	globals.Logger.Infof("TX Size %0.1f KiB", float32(len(tx.Serialize()))/1024.0)

	//if input_sum != (amount + change + tx.Fee()) {
	//	panic(fmt.Sprintf("Inputs %d != outputs ( %d + %d + %d )", input_sum, amount, change, tx.RctSignature.Get_TX_Fee()))
	//}

	//if ConfirmYesNoDefaultNo(l, "Confirm Transaction (y/N)") {
	if true {

		if offline_tx { // if its an offline tx, dump it to a file
			cur_dir, err := os.Getwd()
			if err != nil {
				globals.Logger.Warnf("Cannot obtain current directory to save tx")
				globals.Logger.Infof("Transaction discarded")
				return
			}
			filename := filepath.Join(cur_dir, tx.GetHash().String()+".tx")
			err = ioutil.WriteFile(filename, []byte(hex.EncodeToString(tx.Serialize())), 0600)
			if err == nil {
				if err == nil {
					globals.Logger.Infof("Transaction saved successfully. txid = %s", tx.GetHash())
					globals.Logger.Infof("Saved to %s", filename)
				} else {
					globals.Logger.Warnf("Error saving tx to %s, err %s", filename, err)
				}
			}

		} else {

			err = wallet.SendTransaction(tx) // relay tx to daemon/network
			if err == nil {
				globals.Logger.Infof("Transaction sent successfully. txid = %s", tx.GetHash())
			} else {
				globals.Logger.Warnf("Transaction sending failed txid = %s, err %s", tx.GetHash(), err)
			}

		}

		PressAnyKey(l, wallet) // wait for a key press
	} else {
		globals.Logger.Infof("Transaction discarded")
	}

}