<?php

namespace App\Controllers\Api;

use CodeIgniter\HTTP\ResponseInterface;

class ItemController extends BaseApiController
{
    protected $format = 'json';
    protected $table = 'item';

    /**
     * 아이템 목록
     * GET /api/item/list
     */
    public function index()
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        try {
            $page = (int) ($this->request->getGet('page') ?? 1);
            $perPage = (int) ($this->request->getGet('per_page') ?? 10);
            if ($page < 1) $page = 1;
            if ($perPage < 1) $perPage = 10;
            $offset = ($page - 1) * $perPage;

            $search = trim((string) $this->request->getGet('search'));
            $type   = trim((string) $this->request->getGet('type'));
            $status = trim((string) $this->request->getGet('status'));

            $db = $this->getDB();
            $builder = $db->table($this->table);
            $builder->where('deleted_YN', 'N');

            if ($search !== '') {
                $builder->like('name', $search);
            }
            if (in_array($type, ['T', 'P', 'B'], true)) {
                $builder->where('type', $type);
            }
            if ($status === 'Y' || $status === 'N') {
                $builder->where('status_YN', $status);
            }

            $total = $builder->countAllResults(false);

            $items = $builder
                ->select('id, name, type, point, file_name, file_path, status_YN, created_at, updated_at')
                ->orderBy('id', 'DESC')
                ->limit($perPage, $offset)
                ->get()
                ->getResult();

            return $this->respondSuccess([
                'items'       => $items,
                'total'       => $total,
                'page'        => $page,
                'per_page'    => $perPage,
                'total_pages' => (int) ceil($total / $perPage),
            ]);
        } catch (\Exception $e) {
            log_message('error', 'ItemController index error: ' . $e->getMessage());
            return $this->respondError('목록 조회 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * 아이템 상세 조회
     * GET /api/item/:id
     */
    public function show($id = null)
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        if (empty($id)) {
            return $this->respondError('ID가 필요합니다.', ResponseInterface::HTTP_BAD_REQUEST);
        }

        try {
            $row = $this->getDB()->table($this->table)
                ->where('id', (int) $id)
                ->where('deleted_YN', 'N')
                ->get()
                ->getRow();

            if (!$row) {
                return $this->respondError('해당 아이템을 찾을 수 없습니다.', ResponseInterface::HTTP_NOT_FOUND);
            }

            return $this->respondSuccess($row);
        } catch (\Exception $e) {
            log_message('error', 'ItemController show error: ' . $e->getMessage());
            return $this->respondError('조회 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * 아이템 수정 (텍스트 필드)
     * PUT /api/item/:id    (JSON)
     */
    public function update($id = null)
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        if (empty($id)) {
            return $this->respondError('ID가 필요합니다.', ResponseInterface::HTTP_BAD_REQUEST);
        }

        try {
            $payload = $this->request->getJSON(true);
            if (!is_array($payload) || empty($payload)) {
                $payload = $this->request->getRawInput() ?? [];
            }

            $name   = trim((string) ($payload['name'] ?? ''));
            $type   = trim((string) ($payload['type'] ?? ''));
            $point  = $payload['point'] ?? null;
            $status = trim((string) ($payload['status_YN'] ?? 'Y'));

            if ($name === '') {
                return $this->respondError('아이템명을 입력하세요.', ResponseInterface::HTTP_BAD_REQUEST);
            }
            if (mb_strlen($name) > 50) {
                return $this->respondError('아이템명은 50자 이내로 입력하세요.', ResponseInterface::HTTP_BAD_REQUEST);
            }
            if (!in_array($type, ['T', 'P', 'B'], true)) {
                return $this->respondError('구분을 선택하세요.', ResponseInterface::HTTP_BAD_REQUEST);
            }

            $pointValue = null;
            if ($type === 'P') {
                if ($point === null || $point === '' || !is_numeric($point) || (int) $point < 0) {
                    return $this->respondError('포인트를 입력하세요.', ResponseInterface::HTTP_BAD_REQUEST);
                }
                $pointValue = (int) $point;
            } elseif ($type === 'B') {
                if ($point !== null && $point !== '') {
                    if (!is_numeric($point) || (int) $point < 0) {
                        return $this->respondError('포인트는 0 이상의 숫자여야 합니다.', ResponseInterface::HTTP_BAD_REQUEST);
                    }
                    $pointValue = (int) $point;
                }
            }
            $status = ($status === 'N') ? 'N' : 'Y';

            $db = $this->getDB();
            $exists = $db->table($this->table)
                ->where('id', (int) $id)->where('deleted_YN', 'N')->countAllResults();
            if ($exists === 0) {
                return $this->respondError('해당 아이템을 찾을 수 없습니다.', ResponseInterface::HTTP_NOT_FOUND);
            }

            $db->table($this->table)->where('id', (int) $id)->update([
                'name'       => $name,
                'type'       => $type,
                'point'      => $pointValue,
                'status_YN'  => $status,
                'updated_at' => date('Y-m-d H:i:s'),
            ]);

            $row = $db->table($this->table)->where('id', (int) $id)->get()->getRow();
            return $this->respondSuccess($row, '아이템이 수정되었습니다.');
        } catch (\Exception $e) {
            log_message('error', 'ItemController update error: ' . $e->getMessage());
            return $this->respondError('수정 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * 아이템 이미지 교체
     * POST /api/item/:id/image   (multipart: image)
     */
    public function uploadImage($id = null)
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        if (empty($id)) {
            return $this->respondError('ID가 필요합니다.', ResponseInterface::HTTP_BAD_REQUEST);
        }

        try {
            $db = $this->getDB();
            $row = $db->table($this->table)
                ->where('id', (int) $id)->where('deleted_YN', 'N')->get()->getRow();
            if (!$row) {
                return $this->respondError('해당 아이템을 찾을 수 없습니다.', ResponseInterface::HTTP_NOT_FOUND);
            }

            $file = $this->request->getFile('image');
            if (!$file || !$file->isValid()) {
                return $this->respondError('이미지가 전송되지 않았습니다.', ResponseInterface::HTTP_BAD_REQUEST);
            }
            $allowed = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'];
            $mime = $file->getMimeType();
            if (!in_array($mime, $allowed, true)) {
                return $this->respondError('이미지 형식이 올바르지 않습니다.', ResponseInterface::HTTP_BAD_REQUEST);
            }

            $uploadPath = FCPATH . 'uploads/item/';
            if (!is_dir($uploadPath)) {
                mkdir($uploadPath, 0755, true);
            }
            $fileName = $file->getClientName();
            $stored = $file->getRandomName();
            $file->move($uploadPath, $stored);

            // 기존 이미지 삭제
            if (!empty($row->file_path)) {
                $oldFull = FCPATH . ltrim($row->file_path, '/');
                if (is_file($oldFull)) @unlink($oldFull);
            }

            $db->table($this->table)->where('id', (int) $id)->update([
                'file_name'  => $fileName,
                'file_path'  => '/uploads/item/' . $stored,
                'updated_at' => date('Y-m-d H:i:s'),
            ]);

            $updated = $db->table($this->table)->where('id', (int) $id)->get()->getRow();
            return $this->respondSuccess($updated, '이미지가 교체되었습니다.');
        } catch (\Exception $e) {
            log_message('error', 'ItemController uploadImage error: ' . $e->getMessage());
            return $this->respondError('이미지 업로드 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * 아이템 이미지 제거
     * DELETE /api/item/:id/image
     */
    public function deleteImage($id = null)
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        if (empty($id)) {
            return $this->respondError('ID가 필요합니다.', ResponseInterface::HTTP_BAD_REQUEST);
        }

        try {
            $db = $this->getDB();
            $row = $db->table($this->table)
                ->where('id', (int) $id)->where('deleted_YN', 'N')->get()->getRow();
            if (!$row) {
                return $this->respondError('해당 아이템을 찾을 수 없습니다.', ResponseInterface::HTTP_NOT_FOUND);
            }

            if (!empty($row->file_path)) {
                $full = FCPATH . ltrim($row->file_path, '/');
                if (is_file($full)) @unlink($full);
            }

            $db->table($this->table)->where('id', (int) $id)->update([
                'file_name'  => null,
                'file_path'  => null,
                'updated_at' => date('Y-m-d H:i:s'),
            ]);

            return $this->respondSuccess(null, '이미지가 제거되었습니다.');
        } catch (\Exception $e) {
            log_message('error', 'ItemController deleteImage error: ' . $e->getMessage());
            return $this->respondError('이미지 제거 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * 아이템 삭제 (soft delete)
     * DELETE /api/item/:id
     */
    public function delete($id = null)
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        if (empty($id)) {
            return $this->respondError('ID가 필요합니다.', ResponseInterface::HTTP_BAD_REQUEST);
        }

        try {
            $db = $this->getDB();
            $exists = $db->table($this->table)
                ->where('id', (int) $id)->where('deleted_YN', 'N')->countAllResults();
            if ($exists === 0) {
                return $this->respondError('해당 아이템을 찾을 수 없습니다.', ResponseInterface::HTTP_NOT_FOUND);
            }

            $db->table($this->table)->where('id', (int) $id)->update([
                'deleted_YN' => 'Y',
                'updated_at' => date('Y-m-d H:i:s'),
            ]);

            return $this->respondSuccess(null, '아이템이 삭제되었습니다.');
        } catch (\Exception $e) {
            log_message('error', 'ItemController delete error: ' . $e->getMessage());
            return $this->respondError('삭제 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * 아이템 등록
     * POST /api/item   (multipart: name, type, point, status_YN, image)
     */
    public function create()
    {
        $auth = $this->requireAuth();
        if ($auth instanceof ResponseInterface) {
            return $auth;
        }

        try {
            $name   = trim((string) $this->request->getPost('name'));
            $type   = trim((string) $this->request->getPost('type'));    // T(진출권) / P(포인트) / B(뱃지)
            $point  = $this->request->getPost('point');
            $status = trim((string) $this->request->getPost('status_YN'));
            $file   = $this->request->getFile('image');

            // 필수 검증
            if ($name === '') {
                return $this->respondError('아이템명을 입력하세요.', ResponseInterface::HTTP_BAD_REQUEST);
            }
            if (mb_strlen($name) > 50) {
                return $this->respondError('아이템명은 50자 이내로 입력하세요.', ResponseInterface::HTTP_BAD_REQUEST);
            }
            if (!in_array($type, ['T', 'P', 'B'], true)) {
                return $this->respondError('구분을 선택하세요.', ResponseInterface::HTTP_BAD_REQUEST);
            }

            // type 별 포인트 처리
            // T(진출권): 포인트 무시 (null), P(포인트): 필수 + 양수, B(뱃지): 선택
            $pointValue = null;
            if ($type === 'P') {
                if ($point === null || $point === '' || !is_numeric($point) || (int) $point < 0) {
                    return $this->respondError('포인트를 입력하세요.', ResponseInterface::HTTP_BAD_REQUEST);
                }
                $pointValue = (int) $point;
            } elseif ($type === 'B') {
                if ($point !== null && $point !== '') {
                    if (!is_numeric($point) || (int) $point < 0) {
                        return $this->respondError('포인트는 0 이상의 숫자여야 합니다.', ResponseInterface::HTTP_BAD_REQUEST);
                    }
                    $pointValue = (int) $point;
                }
            }

            $status = ($status === 'N') ? 'N' : 'Y';

            // 이미지 업로드 (선택)
            $fileName = null;
            $filePath = null;
            if ($file && $file->isValid()) {
                $allowed = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'];
                $mime = $file->getMimeType();
                if (!in_array($mime, $allowed, true)) {
                    return $this->respondError('이미지 형식이 올바르지 않습니다. (JPG/PNG/GIF/WebP)', ResponseInterface::HTTP_BAD_REQUEST);
                }
                $uploadPath = FCPATH . 'uploads/item/';
                if (!is_dir($uploadPath)) {
                    mkdir($uploadPath, 0755, true);
                }
                $fileName = $file->getClientName();
                $stored = $file->getRandomName();
                $file->move($uploadPath, $stored);
                $filePath = '/uploads/item/' . $stored;
            }

            $insertData = [
                'name'       => $name,
                'type'       => $type,
                'point'      => $pointValue,
                'file_name'  => $fileName,
                'file_path'  => $filePath,
                'status_YN'  => $status,
                'created_at' => date('Y-m-d H:i:s'),
            ];

            $db = $this->getDB();
            if (!$db->table($this->table)->insert($insertData)) {
                return $this->respondError('등록에 실패했습니다.', ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
            }

            $newId = $db->insertID();
            $row = $db->table($this->table)->where('id', $newId)->get()->getRow();

            return $this->respondSuccess($row, '아이템이 등록되었습니다.', ResponseInterface::HTTP_CREATED);
        } catch (\Exception $e) {
            log_message('error', 'ItemController create error: ' . $e->getMessage());
            return $this->respondError('등록 중 오류가 발생했습니다: ' . $e->getMessage(), ResponseInterface::HTTP_INTERNAL_SERVER_ERROR);
        }
    }
}