<?php

namespace App\Http\Controllers\Api;

use App\Models\Configuration;
use App\Models\Reimbursement;
use Symfony\Component\HttpFoundation\Response;

class ReimbursementController extends BaseApiController
{
    protected Reimbursement $reimbursement;
    protected Configuration $config;

    public function __construct()
    {
        parent::__construct();
        $this->reimbursement = model(Reimbursement::class);
        $this->config        = model(Configuration::class);
    }

    public function index()
    {
        $page          = max(1, (int) ($this->request->getGet('page') ?? 1));
        $perPage       = min(100, max(1, (int) ($this->request->getGet('per_page') ?? 20)));
        $status        = $this->request->getGet('status');
        $reimbursedTo  = $this->request->getGet('reimbursed_to');
        $schoolYear    = $this->config->getConfig('school_year');
        $semester      = $this->config->getConfig('semester');

        $query = $this->reimbursement->newQuery()
            ->where('school_year', $schoolYear)
            ->where('semester', $semester);

        if (!empty($status)) {
            $query->where('status', $status);
        }

        if (!empty($reimbursedTo)) {
            $query->where('reimbursed_to', $reimbursedTo);
        }

        $result = $this->paginate($query, $page, $perPage);

        return $this->success($result, 'Reimbursements retrieved successfully');
    }

    public function show($id = null)
    {
        $reimbursement = $this->reimbursement->find($id);
        if (!$reimbursement) {
            return $this->error('Reimbursement not found', Response::HTTP_NOT_FOUND);
        }

        return $this->success($reimbursement, 'Reimbursement retrieved successfully');
    }

    public function store()
    {
        $user = $this->getCurrentUser();
        if (!$user) {
            return $this->respondError('Authentication required', Response::HTTP_UNAUTHORIZED);
        }

        $data = $this->payloadData();
        if (empty($data)) {
            return $this->error('Invalid request data', Response::HTTP_BAD_REQUEST);
        }

        $rules = [
            'amount'        => 'required|numeric',
            'reimbursed_to' => 'required|integer',
            'description'   => 'required',
            'expense_id'    => 'required|integer',
        ];

        $errors = $this->validateRequest($data, $rules);
        if (!empty($errors)) {
            return $this->respondValidationError($errors);
        }

        $schoolYear = $this->config->getConfig('school_year');
        $semester   = $this->config->getConfig('semester');

        $reimbursementData = [
            'amount'               => $data['amount'],
            'reimbursed_to'        => $data['reimbursed_to'],
            'description'          => $data['description'],
            'expense_id'           => $data['expense_id'],
            'added_by'             => $user->id,
            'school_year'          => $schoolYear,
            'semester'             => $semester,
            'status'               => $data['status'] ?? 'pending',
            'reimbursement_method' => $data['reimbursement_method'] ?? null,
            'check_number'         => $data['check_number'] ?? null,
        ];

        try {
            $reimbursement = $this->reimbursement->create($reimbursementData);
            return $this->success($reimbursement->toArray(), 'Reimbursement created successfully', Response::HTTP_CREATED);
        } catch (\Throwable $e) {
            log_message('error', 'Reimbursement creation error: ' . $e->getMessage());
            return $this->respondError('Failed to create reimbursement', Response::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    public function update($id = null)
    {
        $reimbursement = $this->reimbursement->find($id);
        if (!$reimbursement) {
            return $this->error('Reimbursement not found', Response::HTTP_NOT_FOUND);
        }

        $user = $this->getCurrentUser();
        if (!$user) {
            return $this->respondError('Authentication required', Response::HTTP_UNAUTHORIZED);
        }

        $data = $this->payloadData();
        if (empty($data)) {
            return $this->error('Invalid request data', Response::HTTP_BAD_REQUEST);
        }

        $allowedFields = ['status', 'reimbursement_method', 'check_number'];
        $updateData = [];

        foreach ($allowedFields as $field) {
            if (array_key_exists($field, $data)) {
                $updateData[$field] = $data[$field];
            }
        }

        if (isset($updateData['status']) && $updateData['status'] === 'approved') {
            $updateData['approved_by'] = $user->id;
        }

        if (empty($updateData)) {
            return $this->error('No valid fields to update', Response::HTTP_BAD_REQUEST);
        }

        try {
            $this->reimbursement->update($id, $updateData);
            $updatedReimbursement = $this->reimbursement->find($id);
            return $this->success($updatedReimbursement, 'Reimbursement updated successfully');
        } catch (\Throwable $e) {
            log_message('error', 'Reimbursement update error: ' . $e->getMessage());
            return $this->respondError('Failed to update reimbursement', Response::HTTP_INTERNAL_SERVER_ERROR);
        }
    }
}