<?php

namespace App\Services;

use App\Models\Orders\Order;
use App\Models\Production\BendingItemMapping;

class BendingCodeService extends Service
{
    // =========================================================================
    // 제품 코드 (7종)
    // =========================================================================
    public const PRODUCTS = [
        ['code' => 'R', 'name' => '가이드레일(벽면형)'],
        ['code' => 'S', 'name' => '가이드레일(측면형)'],
        ['code' => 'G', 'name' => '연기차단재'],
        ['code' => 'B', 'name' => '하단마감재(스크린)'],
        ['code' => 'T', 'name' => '하단마감재(철재)'],
        ['code' => 'L', 'name' => 'L-Bar'],
        ['code' => 'C', 'name' => '케이스'],
    ];

    // =========================================================================
    // 종류 코드 + 사용 가능 제품
    // =========================================================================
    public const SPECS = [
        ['code' => 'M', 'name' => '본체', 'products' => ['R', 'S']],
        ['code' => 'T', 'name' => '본체(철재)', 'products' => ['R', 'S']],
        ['code' => 'C', 'name' => 'C형', 'products' => ['R', 'S']],
        ['code' => 'D', 'name' => 'D형', 'products' => ['R', 'S']],
        ['code' => 'S', 'name' => 'SUS(마감)', 'products' => ['R', 'S', 'B', 'T']],
        ['code' => 'U', 'name' => 'SUS(마감)2', 'products' => ['S']],
        ['code' => 'E', 'name' => 'EGI(마감)', 'products' => ['R', 'S', 'B', 'T']],
        ['code' => 'I', 'name' => '화이바원단', 'products' => ['G']],
        ['code' => 'A', 'name' => '스크린용', 'products' => ['L']],
        ['code' => 'F', 'name' => '전면부', 'products' => ['C']],
        ['code' => 'P', 'name' => '점검구', 'products' => ['C']],
        ['code' => 'L', 'name' => '린텔부', 'products' => ['C']],
        ['code' => 'B', 'name' => '후면코너부', 'products' => ['C']],
    ];

    // =========================================================================
    // 모양&길이 코드
    // =========================================================================
    public const LENGTHS_SMOKE_BARRIER = [
        ['code' => '53', 'name' => 'W50 × 3000'],
        ['code' => '54', 'name' => 'W50 × 4000'],
        ['code' => '83', 'name' => 'W80 × 3000'],
        ['code' => '84', 'name' => 'W80 × 4000'],
    ];

    public const LENGTHS_GENERAL = [
        ['code' => '12', 'name' => '1219'],
        ['code' => '24', 'name' => '2438'],
        ['code' => '30', 'name' => '3000'],
        ['code' => '35', 'name' => '3500'],
        ['code' => '40', 'name' => '4000'],
        ['code' => '41', 'name' => '4150'],
        ['code' => '42', 'name' => '4200'],
        ['code' => '43', 'name' => '4300'],
    ];

    // =========================================================================
    // 제품+종류 → 원자재(재질) 매핑
    // =========================================================================
    public const MATERIAL_MAP = [
        'G:I' => '화이바원단',
        'B:S' => 'SUS 1.2T',
        'B:E' => 'EGI 1.55T',
        'T:S' => 'SUS 1.2T',
        'T:E' => 'EGI 1.55T',
        'L:A' => 'EGI 1.55T',
        'R:M' => 'EGI 1.55T',
        'R:T' => 'EGI 1.55T',
        'R:C' => 'EGI 1.55T',
        'R:D' => 'EGI 1.55T',
        'R:S' => 'SUS 1.2T',
        'R:E' => 'EGI 1.55T',
        'S:M' => 'EGI 1.55T',
        'S:T' => 'EGI 1.55T',
        'S:C' => 'EGI 1.55T',
        'S:D' => 'EGI 1.55T',
        'S:S' => 'SUS 1.2T',
        'S:U' => 'SUS 1.2T',
        'S:E' => 'EGI 1.55T',
        'C:F' => 'EGI 1.55T',
        'C:P' => 'EGI 1.55T',
        'C:L' => 'EGI 1.55T',
        'C:B' => 'EGI 1.55T',
    ];

    /**
     * 코드맵 전체 반환 (프론트엔드 드롭다운 구성용)
     */
    public function getCodeMap(): array
    {
        return [
            'products' => self::PRODUCTS,
            'specs' => self::SPECS,
            'lengths' => [
                'smoke_barrier' => self::LENGTHS_SMOKE_BARRIER,
                'general' => self::LENGTHS_GENERAL,
            ],
            'material_map' => self::MATERIAL_MAP,
        ];
    }

    /**
     * 드롭다운 선택 조합 → items 테이블 품목 매핑 조회
     */
    public function resolveItem(string $prodCode, string $specCode, string $lengthCode): ?array
    {
        $mapping = BendingItemMapping::where('tenant_id', $this->tenantId())
            ->where('prod_code', $prodCode)
            ->where('spec_code', $specCode)
            ->where('length_code', $lengthCode)
            ->where('is_active', true)
            ->with('item:id,code,name,specification,unit')
            ->first();

        if (! $mapping || ! $mapping->item) {
            return null;
        }

        return [
            'item_id' => $mapping->item->id,
            'item_code' => $mapping->item->code,
            'item_name' => $mapping->item->name,
            'specification' => $mapping->item->specification,
            'unit' => $mapping->item->unit ?? 'EA',
        ];
    }

    /**
     * LOT 번호 생성 (일련번호 suffix 포함)
     *
     * base: 'GI6317-53' → 결과: 'GI6317-53-001'
     */
    public function generateLotNumber(string $lotBase): string
    {
        $tenantId = $this->tenantId();

        // 같은 base로 시작하는 기존 LOT 수 조회
        $count = Order::withoutGlobalScopes()
            ->where('tenant_id', $tenantId)
            ->where('order_type_code', Order::TYPE_STOCK)
            ->where('options->bending_lot->lot_number', 'LIKE', $lotBase.'-%')
            ->count();

        $seq = str_pad($count + 1, 3, '0', STR_PAD_LEFT);

        return "{$lotBase}-{$seq}";
    }

    /**
     * 날짜 → 4자리 날짜코드
     *
     * 2026-03-17 → '6317'
     * 2026-10-05 → '6A05'
     */
    public static function generateDateCode(string $date): string
    {
        $dt = \Carbon\Carbon::parse($date);
        $year = $dt->year % 10;
        $month = $dt->month;
        $day = $dt->day;

        $monthCode = $month >= 10
            ? chr(55 + $month) // 10=A, 11=B, 12=C
            : (string) $month;

        return $year.$monthCode.str_pad($day, 2, '0', STR_PAD_LEFT);
    }

    /**
     * 제품+종류 → 원자재(재질) 반환
     */
    public static function getMaterial(string $prodCode, string $specCode): ?string
    {
        return self::MATERIAL_MAP["{$prodCode}:{$specCode}"] ?? null;
    }
}