<?php

namespace App\Modules\Finance\Controllers;

use App\Http\Controllers\Controller;
use App\Modules\Finance\Models\AccountPayable;
use Illuminate\Http\Request;
use Inertia\Inertia;

class AccountPayableController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index(Request $request)
    {
        $query = AccountPayable::with(['vendor', 'creator']);

        // 關鍵字搜尋 (單號、供應商名稱)
        if ($request->filled('search')) {
            $search = $request->search;
            $query->where(function ($q) use ($search) {
                $q->where('document_number', 'like', "%{$search}%")
                  ->orWhereHas('vendor', function ($q) use ($search) {
                      $q->where('name', 'like', "%{$search}%");
                  });
            });
        }

        // 狀態過濾
        if ($request->filled('status') && $request->status !== 'all') {
            $query->where('status', $request->status);
        }
        
        // 供應商過濾
        if ($request->filled('vendor_id') && $request->vendor_id !== 'all') {
            $query->where('vendor_id', $request->vendor_id);
        }

        // 日期區間過濾
        if ($request->filled('date_start')) {
            $query->where('due_date', '>=', $request->date_start);
        }
        if ($request->filled('date_end')) {
            $query->where('due_date', '<=', $request->date_end);
        }

        $perPage = $request->input('per_page', 10);
        $payables = $query->latest()->paginate($perPage)->withQueryString();

        $vendors = \App\Modules\Procurement\Models\Vendor::select('id', 'name')->get();

        return Inertia::render('AccountPayable/Index', [
            'payables' => $payables,
            'filters' => $request->all(['search', 'status', 'vendor_id', 'date_start', 'date_end', 'per_page']),
            'vendors' => $vendors,
        ]);
    }

    /**
     * Display the specified resource.
     */
    public function show(AccountPayable $accountPayable)
    {
        $accountPayable->load(['vendor', 'creator']);

        // 嘗試加載來源單據資訊 (目前支援 goods_receipt)
        $sourceDocumentCode = null;
        if ($accountPayable->source_document_type === 'goods_receipt') {
            $receipt = \App\Modules\Inventory\Models\GoodsReceipt::find($accountPayable->source_document_id);
            if ($receipt) {
                $sourceDocumentCode = $receipt->code;
            }
        }

        return Inertia::render('AccountPayable/Show', [
            // 將 model 轉換成 array 加入額外資訊
            'payable' => array_merge($accountPayable->toArray(), ['source_document_code' => $sourceDocumentCode]),
        ]);
    }

    /**
     * 更新發票資訊
     */
    public function updateInvoice(Request $request, AccountPayable $accountPayable)
    {
        $validated = $request->validate([
            'invoice_number' => 'nullable|string|max:50',
            'invoice_date' => 'nullable|date',
        ]);

        $accountPayable->update([
            'invoice_number' => $validated['invoice_number'],
            'invoice_date' => $validated['invoice_date'],
        ]);

        return back()->with('success', '發票資訊已更新');
    }

    /**
     * 標記已付款
     */
    public function pay(Request $request, AccountPayable $accountPayable)
    {
        $validated = $request->validate([
            'payment_method' => 'required|string|max:50',
            'paid_at' => 'required|date',
            'payment_note' => 'nullable|string|max:255',
        ]);

        if ($accountPayable->status === AccountPayable::STATUS_PAID) {
            return back()->with('error', '該帳款已經標記為已付款');
        }

        $accountPayable->update([
            'status' => AccountPayable::STATUS_PAID,
            'payment_method' => $validated['payment_method'],
            'paid_at' => $validated['paid_at'],
            'payment_note' => $validated['payment_note'],
        ]);

        return back()->with('success', '帳款已成功標記為已付款');
    }
}