<?php
/**
 * 复购立减（付款直接减免、不返现）单元测试
 *
 * 运行方式：
 *   php server/addons/shopro/tests/repurchase_discount_test.php
 */

require_once __DIR__ . '/../library/commission/RepurchaseService.php';

use addons\shopro\library\commission\RepurchaseService;

class RepurchaseDiscountTest
{
    private $passed = 0;
    private $failed = 0;

    public function run()
    {
        echo "========================================\n";
        echo "  复购立减单元测试 (TDD)\n";
        echo "========================================\n\n";

        $this->testNonRepurchaseGoods();
        $this->testFirstBuyNoDiscount();
        $this->testRepurchaseFixedDiscount();
        $this->testRepurchaseRateDiscount();
        $this->testDiscountCapProtection();
        $this->testMixedOrderDiscounts();
        $this->testGoodsDetailRepurchaseTip();

        echo "\n----------------------------------------\n";
        echo "测试结果: {$this->passed} 通过, {$this->failed} 失败\n";
        echo "----------------------------------------\n";

        if ($this->failed > 0) {
            exit(1);
        }
    }

    private function assert($condition, $message)
    {
        if ($condition) {
            $this->passed++;
            echo "  [PASS] {$message}\n";
        } else {
            $this->failed++;
            echo "  [FAIL] {$message}\n";
        }
    }

    /**
     * 测试场景 1: 商品未开启复购规则，即使买家买过多次，也不享受复购立减
     */
    public function testNonRepurchaseGoods()
    {
        echo "场景 1: 未开启复购的普通商品测试\n";

        $item = [
            'goods_id' => 101,
            'goods_num' => 2,
            'goods_price' => 100.00,
            'goods_amount' => 200.00
        ];
        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'fixed',
            'self_amount' => 10.00,
            'self_rate' => 5.0
        ];

        // 模拟商品没有开启复购规则 (repurchase_enable = 0)
        $discount = RepurchaseService::calculateItemDiscount(
            $item,
            $config,
            false, // 商品未参与复购
            true   // 买家历史买过
        );

        $this->assert($discount === 0.0, "未开启复购的商品立减金额应为 0.00 (实际: {$discount})");
    }

    /**
     * 测试场景 2: 指定商品首次购买（历史无订单），不享受立减
     */
    public function testFirstBuyNoDiscount()
    {
        echo "\n场景 2: 指定商品首购（历史无该商品购买记录）\n";

        $item = [
            'goods_id' => 102,
            'goods_num' => 1,
            'goods_price' => 200.00,
            'goods_amount' => 200.00
        ];
        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'fixed',
            'self_amount' => 20.00,
            'self_rate' => 10.0
        ];

        // 商品参与复购，但买家首次购买（isRepurchase = false）
        $discount = RepurchaseService::calculateItemDiscount(
            $item,
            $config,
            true,  // 商品参与复购
            false  // 买家首次购买
        );

        $this->assert($discount === 0.0, "首购指定商品立减金额应为 0.00 (实际: {$discount})");
    }

    /**
     * 测试场景 3: 指定商品复购（固定金额模式，按件累加）
     */
    public function testRepurchaseFixedDiscount()
    {
        echo "\n场景 3: 指定商品复购 · 固定金额模式 (买 3 件，每件立减 5 元)\n";

        $item = [
            'goods_id' => 103,
            'goods_num' => 3,
            'goods_price' => 50.00,
            'goods_amount' => 150.00
        ];
        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'fixed',
            'self_amount' => 5.00,
            'self_rate' => 0
        ];

        $discount = RepurchaseService::calculateItemDiscount(
            $item,
            $config,
            true,  // 商品参与复购
            true   // 买家复购
        );

        // 预期立减 5 * 3 = 15.00
        $this->assert($discount === 15.00, "复购 3 件每件立减 5 元，总立减应为 15.00 (实际: {$discount})");
    }

    /**
     * 测试场景 4: 指定商品复购 · 百分比模式 (立减 10%)
     */
    public function testRepurchaseRateDiscount()
    {
        echo "\n场景 4: 指定商品复购 · 百分比模式 (100 元 × 2 件，立减 10%)\n";

        $item = [
            'goods_id' => 104,
            'goods_num' => 2,
            'goods_price' => 100.00,
            'goods_amount' => 200.00
        ];
        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'rate',
            'self_amount' => 0,
            'self_rate' => 10.0
        ];

        $discount = RepurchaseService::calculateItemDiscount(
            $item,
            $config,
            true,  // 商品参与复购
            true   // 买家复购
        );

        // 预期立减 200 * 10% = 20.00
        $this->assert($discount === 20.00, "复购 200 元立减 10%，总立减应为 20.00 (实际: {$discount})");
    }

    /**
     * 测试场景 5: 边界兜底保护（立减金额不可超过商品总额）
     */
    public function testDiscountCapProtection()
    {
        echo "\n场景 5: 边界兜底保护 (商品单价 5 元，配置立减 10 元)\n";

        $item = [
            'goods_id' => 105,
            'goods_num' => 1,
            'goods_price' => 5.00,
            'goods_amount' => 5.00
        ];
        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'fixed',
            'self_amount' => 10.00,
            'self_rate' => 0
        ];

        $discount = RepurchaseService::calculateItemDiscount(
            $item,
            $config,
            true,  // 商品参与复购
            true   // 买家复购
        );

        // 预期立减不得超过 5.00
        $this->assert($discount === 5.00, "立减金额不得超过商品金额 5.00 (实际: {$discount})");
    }

    /**
     * 测试场景 6: 混合商品订单结算 (包含复购商品与非复购商品)
     */
    public function testMixedOrderDiscounts()
    {
        echo "\n场景 6: 混合商品订单结算 (商品A复购立减10元，商品B首购不减)\n";

        $goodsList = [
            [
                'goods_id' => 201,
                'goods_num' => 1,
                'goods_price' => 100.00,
                'goods_amount' => 100.00,
                'discount_fee' => 0.00
            ],
            [
                'goods_id' => 202,
                'goods_num' => 2,
                'goods_price' => 50.00,
                'goods_amount' => 100.00,
                'discount_fee' => 0.00
            ]
        ];

        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'fixed',
            'self_amount' => 10.00,
            'self_rate' => 0
        ];

        // 模拟商品规则：201 参与复购，202 不参与
        $goodsRuleChecker = function ($goodsId) {
            return $goodsId === 201;
        };

        // 模拟历史购买记录：买家买过 201，未买过 202
        $historyChecker = function ($userId, $goodsId) {
            return $goodsId === 201;
        };

        $result = RepurchaseService::calculateOrderRepurchaseDiscounts(
            $goodsList,
            1, // userId
            $config,
            $goodsRuleChecker,
            $historyChecker
        );

        $totalDiscount = $result['total_repurchase_discount'];
        $newGoodsList = $result['goods_list'];

        $this->assert($totalDiscount === 10.00, "整单复购立减总额应为 10.00 (实际: {$totalDiscount})");
        $this->assert($newGoodsList[0]['repurchase_discount_money'] === 10.00, "商品 201 立减应为 10.00 (实际: {$newGoodsList[0]['repurchase_discount_money']})");
        $this->assert($newGoodsList[1]['repurchase_discount_money'] === 0.00, "商品 202 立减应为 0.00 (实际: {$newGoodsList[1]['repurchase_discount_money']})");
    }

    /**
     * 测试场景 7: 商详复购立减提示文案与状态
     */
    public function testGoodsDetailRepurchaseTip()
    {
        echo "\n场景 7: 商详页复购立减提示逻辑\n";

        $config = [
            'enable' => true,
            'self_enable' => true,
            'self_type' => 'fixed',
            'self_amount' => 15.00,
            'self_rate' => 0
        ];

        // 模拟已购买老客
        $discountDesc = ($config['self_type'] ?? 'fixed') === 'rate' ? ($config['self_rate'] . '%') : ('￥' . $config['self_amount']);
        $tipRepurchase = '您曾购买过本商品，再次下单立减' . $discountDesc;
        $tipNew = '老客复购享立减' . $discountDesc;

        $this->assert($tipRepurchase === '您曾购买过本商品，再次下单立减￥15', "老客专享提示文案匹配 (实际: {$tipRepurchase})");
        $this->assert($tipNew === '老客复购享立减￥15', "新客引导提示文案匹配 (实际: {$tipNew})");
    }
}

(new RepurchaseDiscountTest())->run();