<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     * 采购管理（C1-C6）：采购单、采购明细（发送供应商）、采购金额分摊（D3）
     */
    public function up(): void
    {
        // 采购单表（C1 基于所有门店订单汇总生成）
        if (! Schema::hasTable('purchase_order')) {
            Schema::create('purchase_order', function (Blueprint $table) {
                $table->increments('id')->comment('采购单ID');
                $table->string('purchase_no', 32)->unique()->comment('采购单编号');
                $table->date('purchase_date')->comment('采购日期');
                $table->integer('status')->default(0)->comment('采购单状态（0待发送 1部分发送 2全部发送 3已完成）');
                $table->decimal('total_quantity', 10, 2)->default(0)->comment('采购总量');
                $table->decimal('total_weight', 10, 3)->default(0)->comment('采购总重量');
                $table->decimal('estimate_amount', 10, 2)->default(0)->comment('预估金额（按订货汇总）');
                $table->decimal('actual_amount', 10, 2)->default(0)->comment('实际采购金额');
                $table->integer('operator_id')->default(0)->comment('采购员（系统用户ID）');
                $table->string('remark', 255)->default('')->comment('备注');
                $table->timestamps();
                $table->index(['purchase_date', 'status'], 'purchase_order_date_status_index');
                $table->comment('采购单表');
            });
        }

        // 采购单明细表（C2/C3 按分类排序导出，C4 可修改，C5/C6 发送供应商及状态标记）
        if (! Schema::hasTable('purchase_order_item')) {
            Schema::create('purchase_order_item', function (Blueprint $table) {
                $table->increments('id')->comment('明细ID');
                $table->integer('purchase_id')->comment('采购单ID');
                $table->integer('product_id')->comment('商品ID');
                $table->integer('supplier_id')->default(0)->comment('供应商ID');
                $table->string('product_name', 100)->comment('品名（快照）');
                $table->string('product_spec', 100)->default('')->comment('规格/包规（快照）');
                $table->decimal('price', 10, 2)->default(0)->comment('采购单价');
                $table->decimal('quantity', 10, 2)->default(0)->comment('采购量');
                $table->decimal('weight', 10, 3)->default(0)->comment('实际称重');
                $table->decimal('amount', 10, 2)->default(0)->comment('采购金额');
                $table->integer('sort')->default(0)->comment('排序（导出用）');
                $table->integer('is_sent')->default(0)->comment('是否已发送供应商（1已发送 0未发送）');
                $table->timestamp('sent_at')->nullable()->comment('发送时间');
                $table->timestamp('supplier_confirmed_at')->nullable()->comment('供应商确认接单时间（NULL未确认）');
                $table->string('remark', 255)->default('')->comment('备注');
                $table->timestamps();
                $table->index(['purchase_id'], 'purchase_order_item_purchase_index');
                $table->index(['supplier_id', 'is_sent'], 'purchase_order_item_supplier_sent_index');
                $table->comment('采购单明细表');
            });
        }

        // 采购分摊表（D3 采购金额自动分配到各门店/各单品）
        if (! Schema::hasTable('purchase_allocation')) {
            Schema::create('purchase_allocation', function (Blueprint $table) {
                $table->increments('id')->comment('分摊ID');
                $table->integer('purchase_item_id')->comment('采购单明细ID');
                $table->integer('order_item_id')->comment('门店订货明细ID');
                $table->integer('store_id')->comment('分摊到的门店ID');
                $table->integer('product_id')->comment('商品ID');
                $table->decimal('quantity', 10, 2)->default(0)->comment('分摊数量');
                $table->decimal('weight', 10, 3)->default(0)->comment('分摊重量');
                $table->decimal('amount', 10, 2)->default(0)->comment('分摊金额');
                $table->timestamps();
                $table->index(['purchase_item_id'], 'purchase_allocation_item_index');
                $table->index(['order_item_id'], 'purchase_allocation_order_item_index');
                $table->index(['store_id'], 'purchase_allocation_store_index');
                $table->comment('采购分摊表');
            });
        }
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('purchase_order');
        Schema::dropIfExists('purchase_order_item');
        Schema::dropIfExists('purchase_allocation');
    }
};