<?php

namespace Modules\Accounting\Services;

use Modules\Accounting\Domain\FinancialPostingRequest;
use Modules\Accounting\Entities\AccountingBankLoan;
use Modules\Accounting\Entities\AccountingBankLoanPayment;

class BankLoanService
{
    public function __construct(protected FinancialPostingService $postingService) {}

    public function disburse(array $data, int $businessId, int $userId): AccountingBankLoan
    {
        $loan = AccountingBankLoan::create(array_merge($data, [
            'business_id' => $businessId,
            'created_by' => $userId,
            'status' => 'active',
            'paid_principal' => 0,
        ]));

        if (! empty($data['loan_account_id']) && ! empty($data['bank_account_id'])) {
            $mapping = $this->postingService->post(new FinancialPostingRequest(
                businessId: $businessId,
                userId: $userId,
                sourceType: 'bank_loan_disbursement',
                sourceId: $loan->id,
                note: 'Loan '.$loan->loan_number,
                lines: [
                    ['accounting_account_id' => (int) $data['bank_account_id'], 'amount' => (float) $loan->principal_amount, 'type' => 'debit'],
                    ['accounting_account_id' => (int) $data['loan_account_id'], 'amount' => (float) $loan->principal_amount, 'type' => 'credit'],
                ],
                operationDate: $loan->disbursement_date->format('Y-m-d'),
            ));
            $loan->journal_mapping_id = $mapping?->id;
            $loan->save();
        }

        return $loan;
    }

    public function recordPayment(AccountingBankLoan $loan, array $data, int $userId): AccountingBankLoanPayment
    {
        $principal = (float) ($data['principal_amount'] ?? 0);
        $interest = (float) ($data['interest_amount'] ?? 0);
        $total = $principal + $interest;

        $payment = AccountingBankLoanPayment::create([
            'bank_loan_id' => $loan->id,
            'payment_date' => $data['payment_date'],
            'principal_amount' => $principal,
            'interest_amount' => $interest,
            'total_amount' => $total,
            'bank_account_id' => $data['bank_account_id'] ?? null,
            'interest_account_id' => $data['interest_account_id'] ?? null,
            'note' => $data['note'] ?? null,
            'created_by' => $userId,
        ]);

        $lines = [];
        if ($principal > 0 && $loan->loan_account_id) {
            $lines[] = ['accounting_account_id' => (int) $loan->loan_account_id, 'amount' => $principal, 'type' => 'debit'];
        }
        if ($interest > 0 && ! empty($data['interest_account_id'])) {
            $lines[] = ['accounting_account_id' => (int) $data['interest_account_id'], 'amount' => $interest, 'type' => 'debit'];
        }
        if ($total > 0 && ! empty($data['bank_account_id'])) {
            $lines[] = ['accounting_account_id' => (int) $data['bank_account_id'], 'amount' => $total, 'type' => 'credit'];
        }

        if (count($lines) >= 2) {
            $mapping = $this->postingService->post(new FinancialPostingRequest(
                businessId: $loan->business_id,
                userId: $userId,
                sourceType: 'bank_loan_payment',
                sourceId: $payment->id,
                note: 'Loan payment '.$loan->loan_number,
                lines: $lines,
                operationDate: $payment->payment_date->format('Y-m-d'),
            ));
            $payment->journal_mapping_id = $mapping?->id;
            $payment->save();
        }

        $loan->paid_principal = (float) $loan->paid_principal + $principal;
        if ($loan->remainingPrincipal() <= 0.01) {
            $loan->status = 'paid';
        }
        $loan->save();

        return $payment;
    }
}