<?php

namespace App\Classes\Modules\Accounting\ControllersLogic;


use App\Classes\Exceptions\MalformedRequestException;
use App\Classes\General\Abstracts\AbstractControllerLogic;
use App\Classes\Modules\Documents\DataTransferObjects\DocumentObject;
use App\Classes\ValueObjects\Constants\ApprovalStatus;
use App\Models\AccountStatement;
use App\Models\StatementAccount;
use App\Models\StatementTransaction;
use Exception;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Log;
use Maatwebsite\Excel\Facades\Excel;

class ImportAmbankStatementLogic extends AbstractControllerLogic
{

    /**
     * @return array
     */
    protected function notification():array {
        return [
            'title' => 'Import Ambank Statement Transactions Details',
            'message' => 'You have successfully updated the Ambank Statement Transactions Details'
        ];
    }


    /**
     * @param Request $request
     * @return JsonResponse
     * @throws MalformedRequestException
     */
    public function logic(Request $request) : JsonResponse
    {

        $object = new DocumentObject('', $request->input('files'), '', ApprovalStatus::APPROVED, 'imports');

        foreach ($object->getFiles() as $file){
            $collection = Excel::toCollection(null, json_decode($file)->file_info->original->file, null, null, true);

            $statementDetailRows = $collection->first()->slice(0,13);

            $dateInfoKey = $this->findInfoIndexFromExcelCollection($statementDetailRows, "STATEMENT DATE");
            $statementDateRange = trim(explode(':', $this->extractInfoFromExcelCollection($statementDetailRows[$dateInfoKey])[0])[1]);
            $dateFrom = trim(explode('-', $statementDateRange)[0]);
            $dateTo = trim(explode('-', $statementDateRange)[1]);
            $dateFrom = carbon::createFromFormat('d/m/Y', $dateFrom);
            $dateTo = carbon::createFromFormat('d/m/Y', $dateTo);
            $dateTo = carbon::parse($dateTo);  
            $totalDebitKey = $this->findInfoIndexFromExcelCollection($statementDetailRows, "TOTAL DEBIT");
            $totalDebit = $this->extractInfoFromExcelCollection($statementDetailRows[$totalDebitKey])[1];
            $totalCreditKey = $this->findInfoIndexFromExcelCollection($statementDetailRows, "TOTAL CREDIT");
            $totalCredit = $this->extractInfoFromExcelCollection($statementDetailRows[$totalCreditKey])[1];
            $totalTransactions = $totalDebit + $totalCredit;
            $beginBalanceKey = $this->findInfoIndexFromExcelCollection($statementDetailRows, "OPENING BALANCE");
            $beginBalance = ((float) str_replace(',', '', $this->extractInfoFromExcelCollection($statementDetailRows[$beginBalanceKey])[1]));
            $endBalanceKey = $this->findInfoIndexFromExcelCollection($statementDetailRows, "CLOSING BALANCE");
            $endBalance = ((float) str_replace(',', '', $this->extractInfoFromExcelCollection($statementDetailRows[$endBalanceKey])[1]));

            $account = StatementAccount::where('number', 8881040198515)->first();

            if (!$account) {
                throw new Exception("Statement Account for CIEF LITE not found.");
            }

            $statement = AccountStatement::whereDate('date_from', $dateFrom)
                ->whereDate('date_to', $dateTo)
                ->where('total_amount', $totalTransactions)
                ->where('begin_balance', $beginBalance)
                ->where('end_balance', $endBalance)
                ->first();


            if(!$statement){
                $statement = new AccountStatement([
                    'date_from' => $dateFrom,
                    'date_to' => $dateTo,
                    'total_amount' => $totalTransactions,
                    'begin_balance' => $beginBalance,
                    'end_balance' => $endBalance,
                ]);
            }

            $account->statements()->save($statement);

            $collection->map(function ($sheet, $key) use ($statement) {
                if ($key === 0) {
                    $headerColumnKey = $this->findInfoIndexFromExcelCollection($sheet->slice(11), "DATE");
                    $dateColumnKey = $this->findInfoIndexFromExcelCollection($sheet->slice(11)[$headerColumnKey], "DATE");
                    $descriptionColumnKey = $this->findInfoIndexFromExcelCollection($sheet->slice(11)[$headerColumnKey], "TRANSACTION");
                    $debitColumnKey = $this->findInfoIndexFromExcelCollection($sheet->slice(11)[$headerColumnKey], "DEBIT");
                    $creditColumnKey = $this->findInfoIndexFromExcelCollection($sheet->slice(11)[$headerColumnKey], "CREDIT");
                    $balanceColumnKey = $this->findInfoIndexFromExcelCollection($sheet->slice(11)[$headerColumnKey], "BALANCE");
                } else {
                    if (strpos($sheet->first()->first(), "DATE") === false) {
                        return;
                    }
                    $headerColumnKey = $this->findInfoIndexFromExcelCollection($sheet, "DATE");
                    $dateColumnKey = $this->findInfoIndexFromExcelCollection($sheet[$headerColumnKey], "DATE");
                    $descriptionColumnKey = $this->findInfoIndexFromExcelCollection($sheet[$headerColumnKey], "TRANSACTION");
                    $debitColumnKey = $this->findInfoIndexFromExcelCollection($sheet[$headerColumnKey], "DEBIT");
                    $creditColumnKey = $this->findInfoIndexFromExcelCollection($sheet[$headerColumnKey], "CREDIT");
                    $balanceColumnKey = $this->findInfoIndexFromExcelCollection($sheet[$headerColumnKey], "BALANCE");
                }
                
                $sheet->slice($headerColumnKey + 1)->map(function ($row, $index) use (
                    $statement, 
                    $sheet, 
                    $dateColumnKey, 
                    $descriptionColumnKey,
                    $debitColumnKey,
                    $creditColumnKey,
                    $balanceColumnKey, 
                    $key) 
                {
                    // if date or balance is null or empty, skip the row
                    if (!$row[$dateColumnKey] || !$row[$balanceColumnKey]) {
                        return;
                    }

                    $postingDate = carbon::createFromFormat('dM', trim($row[$dateColumnKey]));

                    $description = trim($row[$descriptionColumnKey]);

                    $nextRow = $sheet[$index + 1];

                    if (!$nextRow[$dateColumnKey] && $nextRow[$descriptionColumnKey]) {
                        $nextRowInfoArr = $this->extractInfoFromExcelCollection($nextRow);
                        foreach ($nextRowInfoArr as $col) {
                            if ($col) {
                                $description .= ' '. $col;
                            }
                        }
                    }

                    $descriptionArr = explode(',', $description);

                    $transactionDescription = array_key_exists(0, $descriptionArr) ? trim($descriptionArr[0]) : "";
                    $description2 = array_key_exists(1, $descriptionArr) ? trim($descriptionArr[1]) : "";
                    $description3 = array_key_exists(2, $descriptionArr) ? trim($descriptionArr[2]) : "";
                    $description4 = array_key_exists(3, $descriptionArr) ? trim($descriptionArr[3]) : "";
                    $description5 = array_key_exists(4, $descriptionArr) ? trim($descriptionArr[4]) : "";
              
                    if (count($descriptionArr) > 5) {
                        for ($i = 5; $i < count($descriptionArr); $i++) {
                            $description5 = array_key_exists($i, $descriptionArr) ? $description5 . " " . trim($descriptionArr[$i]) : $description5;
                        }
                    }

                    $amount = $row[$creditColumnKey] ? ((float) str_replace(',', '', trim($row[$creditColumnKey]))) : (-((float) str_replace(',', '', $row[$debitColumnKey])));
                    $endBalance = ((float) str_replace(',', '', $row[$balanceColumnKey]));
                    $transaction = new StatementTransaction([
                        'posting_date' => $postingDate,
                        'transaction_description' => $transactionDescription,
                        'transaction_description_2' => $description2,
                        'transaction_description_3' => $description3,
                        'transaction_description_4' => $description4,
                        'transaction_description_5' => $description5,
                        'amount' => $amount,
                        'end_balance' => $endBalance,
                    ]);

                    // Check if the transaction already exists for this statement
                    $existingTransaction = StatementTransaction::whereDate('posting_date', $postingDate)
                        ->where('amount', $amount)
                        ->where('transaction_description', $transactionDescription)
                        ->whereRaw("CAST(REPLACE(end_balance,',','') AS DECIMAL(15,2)) = ?",[$endBalance])
                        ->first();
                    
                    if (!$existingTransaction) {
                        $statement->transactions()->save($transaction);
                    }

                    return $transaction;
                });
            });
        }

        return $this->response([]);
    }

    private function findInfoIndexFromExcelCollection($collection, $keyword)
    {
        foreach ($collection as $key => $row) {
            if ($row instanceof Collection) {
                $infoArr = $this->extractInfoFromExcelCollection($row);
                foreach ($infoArr as $info) {
                    if (str_contains(strtolower($info), strtolower($keyword))) {
                        return $key;
                    }
                }
            } else {
                if (str_contains(strtolower($row), strtolower($keyword))) {
                    return $key;
                }
            }
           
        }
    }

    // return an array with information of the row start from 0 index
    private function extractInfoFromExcelCollection($collection) 
    {
        return array_values(array_filter($collection->toArray()));
    }

}