// seed — 初始化/重置测试数据
//
// 用法（在 backend/ 目录下执行）：
//
//	go run cmd/seed/main.go            # 写入数据（已存在则跳过）
//	go run cmd/seed/main.go --reset    # 删表重建 + 写入数据
//	go run cmd/seed/main.go --clear    # 清空业务数据 + 重新写入（保留表结构）
//
// 数据遵循「序列号模型」规范（见 CLAUDE.md 数据模型铁律）：
//   - 入库每录一行 = 新建一个独立 product（唯一商品编号），绝不按名称复用；
//   - 入库/出库明细、库存均带快照列（product_code/name/series/spec…）；
//   - 审核生成库存时关联 stock_in_item_id、拷贝 unit_price/批次/生产日期快照；
//   - 出库记录 sale_price（售价），应收(total_amount)按 售价×数量。
package main

import (
	"fmt"
	stdlog "log"
	"os"
	"time"

	"github.com/google/uuid"
	"golang.org/x/crypto/bcrypt"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	"github.com/wangjia/jiu/backend/config"
	"github.com/wangjia/jiu/backend/internal/model"
	"github.com/wangjia/jiu/backend/internal/util"
)

var allModels = []any{
	&model.Shop{},
	&model.User{},
	&model.License{},
	&model.LicenseCode{},
	&model.ProductCategory{},
	&model.Product{},
	&model.ProductNameOption{},
	&model.ProductSeriesOption{},
	&model.ProductSpecOption{},
	&model.Warehouse{},
	&model.Partner{},
	&model.StockInOrder{},
	&model.StockInItem{},
	&model.StockOutOrder{},
	&model.StockOutItem{},
	&model.Inventory{},
	&model.InventoryLog{},
	&model.InventoryCheck{},
	&model.InventoryCheckItem{},
	&model.FinanceRecord{},
	&model.NumberRule{},
}

// 清空顺序（子表先清）
var truncateOrder = []string{
	"inventory_check_items", "inventory_checks",
	"inventory_logs", "inventories",
	"stock_out_items", "stock_out_orders",
	"stock_in_items", "stock_in_orders",
	"finance_records", "number_rules",
	"partners", "warehouses",
	"products", "product_spec_options", "product_series_options", "product_name_options", "product_categories",
	"licenses", "users", "shops",
}

func main() {
	mode := ""
	if len(os.Args) > 1 {
		mode = os.Args[1]
	}

	config.Load()

	db, err := gorm.Open(mysql.Open(config.C.Database.DSN), &gorm.Config{
		Logger: logger.New(
			stdlog.New(os.Stdout, "\r\n", stdlog.LstdFlags),
			logger.Config{LogLevel: logger.Warn, IgnoreRecordNotFoundError: true},
		),
	})
	if err != nil {
		stdlog.Fatalf("连接数据库失败: %v", err)
	}

	switch mode {
	case "--reset":
		fmt.Println("⚠️  --reset：删除所有表并重建...")
		db.Exec("SET FOREIGN_KEY_CHECKS = 0")
		if err := db.Migrator().DropTable(allModels...); err != nil {
			stdlog.Fatalf("删表失败: %v", err)
		}
		db.Exec("SET FOREIGN_KEY_CHECKS = 1")
		fmt.Println("✅ 所有表已删除")

	case "--clear":
		fmt.Println("🧹 --clear：清空所有业务数据...")
		db.Exec("SET FOREIGN_KEY_CHECKS = 0")
		for _, t := range truncateOrder {
			if err := db.Exec("TRUNCATE TABLE `" + t + "`").Error; err != nil {
				fmt.Printf("   跳过 %s（%v）\n", t, err)
			} else {
				fmt.Printf("   清空 %s\n", t)
			}
		}
		db.Exec("SET FOREIGN_KEY_CHECKS = 1")
		fmt.Println("✅ 数据已清空")
		return
	}

	// 同步表结构
	if err := db.AutoMigrate(allModels...); err != nil {
		stdlog.Fatalf("AutoMigrate 失败: %v", err)
	}
	fmt.Println("✅ 表结构已同步")
	fmt.Println()

	now := time.Now()
	today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
	d := func(daysAgo int) model.Date { return model.Date{Time: today.AddDate(0, 0, -daysAgo)} }
	dptr := func(daysAgo int) *model.Date { dd := model.Date{Time: today.AddDate(0, 0, -daysAgo)}; return &dd }
	ptrT := func(t time.Time) *time.Time { return &t }

	// ═══════════════════════════════════════════════════
	// 门店
	// ═══════════════════════════════════════════════════
	shop := upsert(db, &model.Shop{}, "code = ?", "S001", func() any {
		return &model.Shop{
			Name:            "测试酒库门店",
			Code:            "S001",
			Address:         "北京市朝阳区酒仙桥路甲1号",
			Phone:           "010-12345678",
			ManagerName:     "张三",
			BusinessLicense: "91110105MA0000000X",
		}
	}).(model.Shop)

	// ═══════════════════════════════════════════════════
	// 用户
	// ═══════════════════════════════════════════════════
	hash := mustHash("password123")
	admin := upsert(db, &model.User{}, "shop_id = ? AND username = ?", shop.ID, "admin", func() any {
		return &model.User{
			ShopID:   shop.ID,
			Username: "admin", PasswordHash: hash, RealName: "张三（管理员）",
			Phone: "13800000001", Role: "admin", IsActive: true,
		}
	}).(model.User)
	operator := upsert(db, &model.User{}, "shop_id = ? AND username = ?", shop.ID, "operator", func() any {
		return &model.User{
			ShopID:   shop.ID,
			Username: "operator", PasswordHash: hash, RealName: "李四（操作员）",
			Phone: "13800000002", Role: "operator", IsActive: true,
		}
	}).(model.User)
	upsert(db, &model.User{}, "shop_id = ? AND username = ?", shop.ID, "test", func() any {
		return &model.User{
			ShopID:   shop.ID,
			Username: "test", PasswordHash: hash, RealName: "王五（只读）",
			Phone: "13800000003", Role: "readonly", IsActive: true,
		}
	})

	// ═══════════════════════════════════════════════════
	// 仓库
	// ═══════════════════════════════════════════════════
	wh1 := upsert(db, &model.Warehouse{}, "shop_id = ? AND name = ?", shop.ID, "主仓库", func() any {
		return &model.Warehouse{
			TenantBase: model.TenantBase{ShopID: shop.ID},
			Name:       "主仓库", Location: "A栋1层东侧", IsDefault: true,
		}
	}).(model.Warehouse)
	wh2 := upsert(db, &model.Warehouse{}, "shop_id = ? AND name = ?", shop.ID, "进口酒专库", func() any {
		return &model.Warehouse{
			TenantBase: model.TenantBase{ShopID: shop.ID},
			Name:       "进口酒专库", Location: "B栋2层恒温区", IsDefault: false,
		}
	}).(model.Warehouse)

	// ═══════════════════════════════════════════════════
	// 商品分类
	// ═══════════════════════════════════════════════════
	catBaijiu := upsert(db, &model.ProductCategory{}, "shop_id = ? AND name = ?", shop.ID, "白酒", func() any {
		return &model.ProductCategory{TenantBase: model.TenantBase{ShopID: shop.ID}, Name: "白酒", SortOrder: 1}
	}).(model.ProductCategory)
	catImport := upsert(db, &model.ProductCategory{}, "shop_id = ? AND name = ?", shop.ID, "进口烈酒", func() any {
		return &model.ProductCategory{TenantBase: model.TenantBase{ShopID: shop.ID}, Name: "进口烈酒", SortOrder: 2}
	}).(model.ProductCategory)

	// ═══════════════════════════════════════════════════
	// 商品基础数据字典（品牌/型号/版本 = 名称/系列/规格选项）
	// 序列号模型下：product 由入库逐行生成，字典只是录入时的可选项来源。
	// ═══════════════════════════════════════════════════
	type dimSeed struct{ code, name string }

	for _, s := range []dimSeed{
		{"NA001", "飞天茅台 53度"}, {"NA002", "五粮液 52度"}, {"NA003", "洋河梦之蓝 M6"},
		{"NA004", "泸州老窖 特曲"}, {"NA005", "剑南春 水晶剑"}, {"NA006", "郎酒 红花郎10"},
		{"NA007", "拉菲古堡 2018"}, {"NA008", "人头马 VSOP"},
	} {
		var opt model.ProductNameOption
		if db.Where("shop_id = ? AND name = ?", shop.ID, s.name).First(&opt).Error != nil {
			opt = model.ProductNameOption{TenantBase: model.TenantBase{ShopID: shop.ID}, Code: s.code, Name: s.name}
			db.Create(&opt)
			fmt.Printf("✅ 名称选项：%s %s\n", s.code, s.name)
		}
	}

	for _, s := range []dimSeed{
		{"SE001", "茅台"}, {"SE002", "五粮液"}, {"SE003", "洋河"}, {"SE004", "泸州老窖"},
		{"SE005", "剑南春"}, {"SE006", "郎酒"}, {"SE007", "波尔多"}, {"SE008", "人头马"},
	} {
		var opt model.ProductSeriesOption
		if db.Where("shop_id = ? AND name = ?", shop.ID, s.name).First(&opt).Error != nil {
			opt = model.ProductSeriesOption{TenantBase: model.TenantBase{ShopID: shop.ID}, Code: s.code, Name: s.name}
			db.Create(&opt)
			fmt.Printf("✅ 系列选项：%s %s\n", s.code, s.name)
		}
	}

	for _, s := range []struct {
		code, name string
		quantity   int
	}{
		{"GG001", "500ml/瓶", 1}, {"GG002", "750ml/瓶", 1}, {"GG003", "700ml/瓶", 1},
	} {
		var opt model.ProductSpecOption
		if db.Where("shop_id = ? AND name = ?", shop.ID, s.name).First(&opt).Error != nil {
			opt = model.ProductSpecOption{
				TenantBase: model.TenantBase{ShopID: shop.ID},
				Code:       s.code,
				Name:       s.name,
				Quantity:   s.quantity,
			}
			db.Create(&opt)
			fmt.Printf("✅ 规格选项：%s\n", s.name)
		}
	}

	// 商品模板：仅作为入库逐行生成 product 的来源，本身不直接落 products 表。
	cat := func(c *model.ProductCategory) *uint64 { id := c.ID; return &id }
	catalog := []goods{
		{"飞天茅台 53度", "茅台", "500ml/瓶", "瓶", "贵州茅台", cat(&catBaijiu), 2350, 2800, 10},
		{"五粮液 52度", "五粮液", "500ml/瓶", "瓶", "宜宾五粮液", cat(&catBaijiu), 950, 1200, 6},
		{"洋河梦之蓝 M6", "洋河", "500ml/瓶", "瓶", "江苏洋河", cat(&catBaijiu), 560, 680, 6},
		{"泸州老窖 特曲", "泸州老窖", "500ml/瓶", "瓶", "泸州老窖", cat(&catBaijiu), 420, 520, 6},
		{"剑南春 水晶剑", "剑南春", "500ml/瓶", "瓶", "剑南春", cat(&catBaijiu), 390, 480, 6},
		{"郎酒 红花郎10", "郎酒", "500ml/瓶", "瓶", "古蔺郎酒", cat(&catBaijiu), 320, 420, 6},
		{"拉菲古堡 2018", "波尔多", "750ml/瓶", "瓶", "Château Lafite", cat(&catImport), 3800, 5200, 3},
		{"人头马 VSOP", "人头马", "700ml/瓶", "瓶", "Rémy Martin", cat(&catImport), 480, 680, 3},
	}
	// 商品编码顺序生成器（序列号：每入库一行发一个唯一编号 P0001、P0002…）
	codeSeq := 0
	nextCode := func() string { codeSeq++; return fmt.Sprintf("P%04d", codeSeq) }

	// ═══════════════════════════════════════════════════
	// 往来单位
	// ═══════════════════════════════════════════════════
	type partnerSeed struct {
		code, name, ptype, contact, phone, address, bank string
		creditLimit                                      float64
		remark                                           string
	}
	partnerSeeds := []partnerSeed{
		{"SUP001", "贵州茅台酒股份有限公司", "supplier", "张经理", "0851-22222001",
			"贵州省仁怀市茅台镇", "工商银行仁怀支行 6222 0000 0001 0001",
			5000000, "茅台系列直供，账期30天"},
		{"SUP002", "四川五粮液股份有限公司", "supplier", "王总监", "0831-33333001",
			"四川省宜宾市翠屏区", "建设银行宜宾支行 6227 0000 0001 0002",
			3000000, "五粮液系列授权经销"},
		{"SUP003", "江苏洋河酒厂股份有限公司", "supplier", "赵主任", "0527-44444001",
			"江苏省宿迁市洋河新区", "农业银行宿迁支行 6228 0000 0001 0003",
			2000000, "洋河梦之蓝系列直供"},
		{"SUP004", "四川郎酒股份有限公司", "supplier", "刘经理", "0830-55555001",
			"四川省古蔺县二郎镇", "中国银行古蔺支行 6013 0000 0001 0004",
			1500000, "郎酒红花郎系列"},
		{"CUS001", "北京君悦大酒店", "customer", "李采购", "010-65888001",
			"北京市朝阳区建国门外大街2号", "中信银行北京朝阳支行 6217 0000 0002 0001",
			500000, "五星级酒店，月结"},
		{"CUS002", "上海外滩华尔道夫酒店", "customer", "陈主任", "021-62308001",
			"上海市黄浦区中山东一路2号", "浦发银行上海黄浦支行 6210 0000 0002 0002",
			800000, "豪华酒店，按季结算"},
		{"CUS003", "广州白天鹅宾馆", "customer", "吴采购", "020-81886001",
			"广州市荔湾区沙面南街1号", "招商银行广州荔湾支行 6225 0000 0002 0003",
			300000, "高端宾馆，月结30天"},
	}
	partners := make(map[string]model.Partner)
	for _, s := range partnerSeeds {
		p := upsert(db, &model.Partner{}, "shop_id = ? AND code = ?", shop.ID, s.code, func() any {
			return &model.Partner{
				TenantBase:  model.TenantBase{ShopID: shop.ID},
				Code:        s.code,
				Name:        s.name,
				Type:        s.ptype,
				Contact:     s.contact,
				Phone:       s.phone,
				Address:     s.address,
				BankAccount: s.bank,
				CreditLimit: s.creditLimit,
				Balance:     0,
				Remark:      s.remark,
			}
		}).(model.Partner)
		partners[s.code] = p
	}

	// ═══════════════════════════════════════════════════
	// 编号规则
	// ═══════════════════════════════════════════════════
	upsertNumberRule(db, shop.ID, "stock_in", "RK", 5)
	upsertNumberRule(db, shop.ID, "stock_out", "CK", 3)
	upsertNumberRule(db, shop.ID, "inventory_check", "PD", 1)

	mk := func(db *gorm.DB) *seeder {
		return &seeder{db: db, shopID: shop.ID, catalog: catalog, nextCode: nextCode, supplier: partners}
	}
	sd := mk(db)

	// ═══════════════════════════════════════════════════
	// 入库单（每行新建独立 product + 快照）
	// ═══════════════════════════════════════════════════
	// #1 已审核：茅台+五粮液，主仓库，茅台供应商
	in1 := sd.createStockIn(wh1.ID, wh1.Name, admin.ID, partners["SUP001"].ID,
		"RK20260401001", d(6), "approved", "purchase", "茅台系列首批入库，含飞天茅台及五粮液",
		[]inLine{
			{0, 120, 2350, "BATCH-MT-2024001", dptr(40), "飞天茅台 2024年第一批次"},
			{1, 60, 950, "BATCH-WLY-2024001", dptr(50), "五粮液普五 2024年批次"},
		}, admin.ID, ptrT(today.AddDate(0, 0, -5)))

	// #2 已审核：洋河+泸州+剑南春，主仓库，洋河供应商
	in2 := sd.createStockIn(wh1.ID, wh1.Name, operator.ID, partners["SUP002"].ID,
		"RK20260403001", d(4), "approved", "purchase", "浓香型白酒补货入库",
		[]inLine{
			{2, 48, 560, "BATCH-YH-2024003", dptr(60), "洋河梦之蓝 M6 3月批次"},
			{3, 36, 420, "BATCH-LZ-2024002", dptr(70), "泸州老窖特曲 春季批次"},
			{4, 24, 390, "BATCH-JNC-2024001", dptr(45), "剑南春水晶剑 首批"},
		}, admin.ID, ptrT(today.AddDate(0, 0, -3)))

	// #3 已审核：进口酒，进口酒专库，郎酒供应商（代理进口）
	in3 := sd.createStockIn(wh2.ID, wh2.Name, operator.ID, partners["SUP004"].ID,
		"RK20260404001", d(3), "approved", "purchase", "进口烈酒专库入库，含拉菲及人头马",
		[]inLine{
			{6, 24, 3800, "BATCH-LF-2018001", dptr(400), "拉菲古堡2018，原箱"},
			{7, 36, 480, "BATCH-RTM-2024001", dptr(90), "人头马VSOP，2024年进口"},
		}, admin.ID, ptrT(today.AddDate(0, 0, -2)))

	// #4 待审核：郎酒补货（仅建单+建 product，不生成库存）
	in4 := sd.createStockIn(wh1.ID, wh1.Name, operator.ID, partners["SUP004"].ID,
		"RK20260406001", d(1), "pending", "purchase", "郎酒红花郎补货，待仓库管理员审核",
		[]inLine{
			{5, 60, 320, "BATCH-LJ-2024002", dptr(30), "郎酒红花郎10 第二批次"},
		}, 0, nil)

	// #5 草稿：追加茅台
	sd.createStockIn(wh1.ID, wh1.Name, operator.ID, partners["SUP001"].ID,
		"RK20260407001", d(0), "draft", "purchase", "茅台追加订货，草稿中",
		[]inLine{
			{0, 60, 2380, "BATCH-MT-2024002", dptr(20), "飞天茅台 第二批次"},
		}, 0, nil)

	// 已审核入库单 → 生成库存（带快照 + 关联 stock_in_item_id）
	sd.applyStockInToInventory(in1)
	sd.applyStockInToInventory(in2)
	sd.applyStockInToInventory(in3)

	// ═══════════════════════════════════════════════════
	// 出库单（引用入库已建 product，记 sale_price，应收按售价）
	// ═══════════════════════════════════════════════════
	// #1 已审核：北京君悦大酒店，主仓库
	out1 := sd.createStockOut(wh1.ID, operator.ID, partners["CUS001"].ID,
		"CK20260404001", d(3), "approved", "sale", "北京君悦大酒店 4月份定期供货",
		[]outLine{
			{in1.products[0], 12, 2800, "飞天茅台 12瓶，整箱出库"},
			{in1.products[1], 6, 1200, "五粮液普五 6瓶"},
			{in2.products[0], 12, 680, "洋河梦之蓝 M6 12瓶"},
		}, admin.ID, ptrT(today.AddDate(0, 0, -2)))

	// #2 已审核：上海外滩华尔道夫，进口酒专库
	out2 := sd.createStockOut(wh2.ID, operator.ID, partners["CUS002"].ID,
		"CK20260405001", d(2), "approved", "sale", "上海外滩华尔道夫 进口酒专属采购",
		[]outLine{
			{in3.products[0], 6, 5200, "拉菲古堡2018 6瓶"},
			{in3.products[1], 12, 680, "人头马VSOP 12瓶"},
		}, admin.ID, ptrT(today.AddDate(0, 0, -1)))

	// #3 待审核：广州白天鹅宾馆
	sd.createStockOut(wh1.ID, operator.ID, partners["CUS003"].ID,
		"CK20260406001", d(1), "pending", "sale", "广州白天鹅宾馆 月度供货申请",
		[]outLine{
			{in2.products[1], 24, 520, "泸州老窖特曲 24瓶"},
			{in2.products[2], 12, 480, "剑南春水晶剑 12瓶"},
			{in4.products[0], 12, 420, "郎酒红花郎10 12瓶"},
		}, 0, nil)

	// #4 草稿：君悦追加
	sd.createStockOut(wh1.ID, operator.ID, partners["CUS001"].ID,
		"CK20260407001", d(0), "draft", "sale", "北京君悦追加订单，草稿中",
		[]outLine{
			{in1.products[0], 6, 2800, "飞天茅台 追加 6瓶"},
		}, 0, nil)

	// 已审核出库单 → 扣减库存（FIFO）
	sd.deductStockOut(wh1.ID, admin.ID, out1)
	sd.deductStockOut(wh2.ID, admin.ID, out2)

	// ═══════════════════════════════════════════════════
	// 财务记录（与已审核出库单对应的应收款，按售价口径）
	// ═══════════════════════════════════════════════════
	createFinanceRecord(db, shop.ID, partners["CUS001"].ID, admin.ID,
		"receivable", out1.order.SaleTotal, out1.order.SaleTotal, "stock_out", out1.order.ID,
		d(3), "君悦大酒店4月供货应收款")
	createFinanceRecord(db, shop.ID, partners["CUS002"].ID, admin.ID,
		"receivable", out2.order.SaleTotal, out2.order.SaleTotal, "stock_out", out2.order.ID,
		d(2), "外滩华尔道夫进口酒应收款")
	// 模拟一笔已收款
	createFinanceRecord(db, shop.ID, partners["CUS001"].ID, admin.ID,
		"receipt", out1.order.SaleTotal, 0, "stock_out", out1.order.ID,
		d(1), "君悦大酒店回款，结清")

	// ═══════════════════════════════════════════════════
	// 打印汇总
	// ═══════════════════════════════════════════════════
	fmt.Println("═══════════════════════════════════════════")
	fmt.Println("  测试数据写入完成")
	fmt.Println("═══════════════════════════════════════════")
	fmt.Println()
	fmt.Println("  登录信息：")
	fmt.Printf("    门店编号：%s\n", shop.Code)
	fmt.Println("    admin    / password123  （管理员）")
	fmt.Println("    operator / password123  （操作员）")
	fmt.Println("    test     / password123  （只读）")
	fmt.Println()
	fmt.Println("  数据概览（序列号模型：入库逐行建独立 product）：")
	fmt.Printf("    仓库：%s / %s\n", wh1.Name, wh2.Name)
	fmt.Printf("    入库逐行生成 product：%d 个独立商品编号\n", codeSeq)
	fmt.Println("    往来单位：4 供应商 + 3 客户")
	fmt.Println("    入库单：5 张（3已审核 / 1待审核 / 1草稿）")
	fmt.Println("    出库单：4 张（2已审核 / 1待审核 / 1草稿），记 sale_price，应收按售价")
	fmt.Println("    财务记录：2 应收 + 1 收款")
	fmt.Println("═══════════════════════════════════════════")
}

// ── 数据模板 ────────────────────────────────────────────

// goods 商品模板：入库逐行据此 new 独立 product，模板本身不落库。
type goods struct {
	name, series, spec, unit, brand string
	cat                             *uint64
	purchase, sale                  float64
	minStock                        int
}

// inLine 入库行：g=catalog 下标，qty/price，批次/生产日期/备注。
type inLine struct {
	g          int
	qty, price float64
	batch      string
	prodDate   *model.Date
	remark     string
}

// outLine 出库行：引用入库已建 product，salePrice=售价。
type outLine struct {
	product   model.Product
	qty, sale float64
	remark    string
}

type stockInResult struct {
	order    model.StockInOrder
	items    []model.StockInItem
	products []model.Product
}

type stockOutResult struct {
	order model.StockOutOrder
	items []model.StockOutItem
}

// seeder 收敛公共上下文（db/shop/商品模板/编码序列/供应商）。
type seeder struct {
	db       *gorm.DB
	shopID   uint64
	catalog  []goods
	nextCode func() string
	supplier map[string]model.Partner
}

// ── 入库单（每行新建独立 product + 写快照） ───────────────

func (s *seeder) createStockIn(
	whID uint64, whName string, opID, partnerID uint64,
	orderNo string, date model.Date, status, orderType, remark string,
	lines []inLine, reviewerID uint64, reviewedAt *time.Time,
) stockInResult {
	var o model.StockInOrder
	if s.db.Where("shop_id = ? AND order_no = ?", s.shopID, orderNo).First(&o).Error == nil {
		fmt.Printf("⏭  入库单：%s\n", orderNo)
		return s.loadStockIn(o)
	}

	o = model.StockInOrder{
		TenantBase:  model.TenantBase{ShopID: s.shopID},
		OrderNo:     orderNo,
		Type:        orderType,
		WarehouseID: whID,
		PartnerID:   &partnerID,
		OperatorID:  opID,
		Status:      status,
		OrderDate:   date,
		Remark:      remark,
	}
	if reviewerID > 0 {
		o.ReviewerID = &reviewerID
		o.ReviewedAt = reviewedAt
	}
	s.db.Create(&o)

	var (
		total float64
		items []model.StockInItem
		prods []model.Product
	)
	for _, ln := range lines {
		g := s.catalog[ln.g]
		code := s.nextCode()
		full, initials := util.ToPinyin(g.name)
		// 铁律：入库每行 = 新建一个独立 product（唯一编号），不按名称复用
		p := model.Product{
			TenantBase:     model.TenantBase{ShopID: s.shopID},
			PublicID:       uuid.New().String(),
			Code:           code,
			Name:           g.name,
			Series:         g.series,
			Spec:           g.spec,
			Unit:           g.unit,
			Brand:          g.brand,
			CategoryID:     g.cat,
			PurchasePrice:  ln.price,
			SalePrice:      g.sale,
			MinStock:       g.minStock,
			BatchNo:        ln.batch,
			ProductionDate: ln.prodDate,
			NamePinyin:     full,
			NameInitials:   initials,
		}
		s.db.Create(&p)

		item := model.StockInItem{
			OrderID:        o.ID,
			ShopID:         s.shopID,
			ProductID:      p.ID,
			ProductCode:    code,
			ProductName:    g.name,
			Series:         g.series,
			Spec:           g.spec,
			Quantity:       ln.qty,
			CostPrice:      ln.price,
			CostAmount:     ln.qty * ln.price,
			BatchNo:        ln.batch,
			ProductionDate: ln.prodDate,
			Remark:         ln.remark,
		}
		s.db.Create(&item)
		total += item.CostAmount
		items = append(items, item)
		prods = append(prods, p)
	}
	s.db.Model(&o).Update("cost_total", total)
	o.CostTotal = total

	fmt.Printf("✅ 入库单：%s [%s] 供应商ID=%d 仓库=%s 行数=%d 金额=%.0f\n",
		orderNo, status, partnerID, whName, len(lines), total)
	return stockInResult{order: o, items: items, products: prods}
}

// loadStockIn 单据已存在时，回读其明细与 product，供出库行引用（保证重复执行可用）。
func (s *seeder) loadStockIn(o model.StockInOrder) stockInResult {
	var items []model.StockInItem
	s.db.Where("order_id = ?", o.ID).Order("id ASC").Find(&items)
	prods := make([]model.Product, 0, len(items))
	for _, it := range items {
		var p model.Product
		s.db.First(&p, it.ProductID)
		prods = append(prods, p)
	}
	return stockInResult{order: o, items: items, products: prods}
}

// applyStockInToInventory 已审核入库单 → 逐明细生成库存行（带快照 + 关联 stock_in_item_id）。
func (s *seeder) applyStockInToInventory(r stockInResult) {
	for i := range r.items {
		it := r.items[i]
		var unit string
		if i < len(r.products) {
			unit = r.products[i].Unit
		}
		var qtyBefore float64
		s.db.Model(&model.Inventory{}).
			Where("shop_id = ? AND warehouse_id = ? AND product_id = ? AND deleted_at IS NULL", s.shopID, r.order.WarehouseID, it.ProductID).
			Select("COALESCE(SUM(quantity), 0)").Scan(&qtyBefore)

		whIDCopy := r.order.WarehouseID
		pidCopy := it.ProductID
		itemIDCopy := it.ID
		price := it.CostPrice
		inv := model.Inventory{
			ShopID:         s.shopID,
			WarehouseID:    &whIDCopy,
			ProductID:      &pidCopy,
			StockInItemID:  &itemIDCopy,
			Quantity:       it.Quantity,
			ProductCode:    it.ProductCode,
			ProductName:    it.ProductName,
			Series:         it.Series,
			Spec:           it.Spec,
			Unit:           unit,
			UnitPrice:      &price,
			BatchNo:        it.BatchNo,
			ProductionDate: it.ProductionDate,
		}
		s.db.Create(&inv)

		opID := r.order.OperatorID
		s.db.Create(&model.InventoryLog{
			ShopID: s.shopID, WarehouseID: r.order.WarehouseID, ProductID: it.ProductID,
			Direction: "in", Quantity: it.Quantity, QtyBefore: qtyBefore, QtyAfter: qtyBefore + it.Quantity,
			RefType: "stock_in", RefID: r.order.ID, OperatorID: &opID,
		})
	}
}

// ── 出库单（记 sale_price，应收按售价） ───────────────────

func (s *seeder) createStockOut(
	whID, opID, partnerID uint64,
	orderNo string, date model.Date, status, orderType, remark string,
	lines []outLine, reviewerID uint64, reviewedAt *time.Time,
) stockOutResult {
	var o model.StockOutOrder
	if s.db.Where("shop_id = ? AND order_no = ?", s.shopID, orderNo).First(&o).Error == nil {
		fmt.Printf("⏭  出库单：%s\n", orderNo)
		var items []model.StockOutItem
		s.db.Where("order_id = ?", o.ID).Order("id ASC").Find(&items)
		return stockOutResult{order: o, items: items}
	}

	o = model.StockOutOrder{
		TenantBase:  model.TenantBase{ShopID: s.shopID},
		OrderNo:     orderNo,
		Type:        orderType,
		WarehouseID: whID,
		PartnerID:   &partnerID,
		OperatorID:  opID,
		Status:      status,
		OrderDate:   date,
		Remark:      remark,
	}
	if reviewerID > 0 {
		o.ReviewerID = &reviewerID
		o.ReviewedAt = reviewedAt
	}
	s.db.Create(&o)

	var (
		total, profit float64 // 应收 = Σ 售价×数量；利润 = Σ(售价-成本)×数量
		items []model.StockOutItem
	)
	for _, ln := range lines {
		p := ln.product
		item := model.StockOutItem{
			OrderID:     o.ID,
			ShopID:      s.shopID,
			ProductID:   p.ID,
			ProductCode: p.Code,
			ProductName: p.Name,
			Series:      p.Series,
			Spec:        p.Spec,
			Quantity:    ln.qty,
			CostPrice:   p.PurchasePrice,               // 成本单价（快照）
			SalePrice:   ln.sale,                       // 售价
			CostAmount:  ln.qty * p.PurchasePrice,      // 成本小计
			SaleAmount:  ln.qty * ln.sale,              // 售价小计
			BatchNo:     p.BatchNo,
			Remark:      ln.remark,
		}
		s.db.Create(&item)
		total += ln.qty * ln.sale
		profit += (ln.sale - p.PurchasePrice) * ln.qty
		items = append(items, item)
	}
	s.db.Model(&o).Updates(map[string]interface{}{"sale_total": total, "profit_total": profit})
	o.SaleTotal = total
	o.ProfitTotal = profit

	fmt.Printf("✅ 出库单：%s [%s] 客户ID=%d 仓库ID=%d 行数=%d 应收=%.0f\n",
		orderNo, status, partnerID, whID, len(lines), total)
	return stockOutResult{order: o, items: items}
}

// deductStockOut 已审核出库单 → FIFO 扣减库存 + 写流水。
func (s *seeder) deductStockOut(whID, opID uint64, r stockOutResult) {
	now := time.Now()
	for _, it := range r.items {
		var qtyBefore float64
		s.db.Model(&model.Inventory{}).
			Where("shop_id = ? AND warehouse_id = ? AND product_id = ? AND deleted_at IS NULL", s.shopID, whID, it.ProductID).
			Select("COALESCE(SUM(quantity), 0)").Scan(&qtyBefore)

		var batches []model.Inventory
		s.db.Where("shop_id = ? AND warehouse_id = ? AND product_id = ? AND quantity > 0 AND deleted_at IS NULL",
			s.shopID, whID, it.ProductID).
			Order("created_at ASC").Find(&batches)

		remaining := it.Quantity
		for i := range batches {
			if remaining <= 0 {
				break
			}
			b := &batches[i]
			if b.Quantity <= remaining {
				remaining -= b.Quantity
				s.db.Model(b).Updates(map[string]interface{}{"quantity": 0, "deleted_at": now})
			} else {
				s.db.Model(b).Update("quantity", gorm.Expr("quantity - ?", remaining))
				remaining = 0
			}
		}

		after := qtyBefore - it.Quantity
		if after < 0 {
			after = 0
		}
		s.db.Create(&model.InventoryLog{
			ShopID: s.shopID, WarehouseID: whID, ProductID: it.ProductID,
			Direction: "out", Quantity: it.Quantity, QtyBefore: qtyBefore, QtyAfter: after,
			RefType: "stock_out", RefID: r.order.ID, OperatorID: &opID,
		})
	}
}

// ── 通用 upsert（主数据） ────────────────────────────────

// upsert 通用：查不到就调 factory 建，返回具体值（interface{}）
func upsert(db *gorm.DB, dest any, cond string, args ...any) any {
	// 最后一个 arg 是 factory func
	factoryIdx := len(args) - 1
	factory := args[factoryIdx].(func() any)
	queryArgs := args[:factoryIdx]

	found := false
	switch v := dest.(type) {
	case *model.Shop:
		found = db.Where(cond, queryArgs...).First(v).Error == nil
		if !found {
			obj := factory().(*model.Shop)
			db.Create(obj)
			fmt.Printf("✅ 门店：%s (%s)\n", obj.Name, obj.Code)
			return *obj
		}
		fmt.Printf("⏭  门店：%s (%s)\n", v.Name, v.Code)
		return *v
	case *model.User:
		found = db.Where(cond, queryArgs...).First(v).Error == nil
		if !found {
			obj := factory().(*model.User)
			db.Create(obj)
			fmt.Printf("✅ 用户：%s（%s）\n", obj.Username, obj.Role)
			return *obj
		}
		fmt.Printf("⏭  用户：%s\n", v.Username)
		return *v
	case *model.Warehouse:
		found = db.Where(cond, queryArgs...).First(v).Error == nil
		if !found {
			obj := factory().(*model.Warehouse)
			db.Create(obj)
			fmt.Printf("✅ 仓库：%s（%s）\n", obj.Name, obj.Location)
			return *obj
		}
		fmt.Printf("⏭  仓库：%s\n", v.Name)
		return *v
	case *model.ProductCategory:
		found = db.Where(cond, queryArgs...).First(v).Error == nil
		if !found {
			obj := factory().(*model.ProductCategory)
			db.Create(obj)
			fmt.Printf("✅ 分类：%s\n", obj.Name)
			return *obj
		}
		fmt.Printf("⏭  分类：%s\n", v.Name)
		return *v
	case *model.Partner:
		found = db.Where(cond, queryArgs...).First(v).Error == nil
		if !found {
			obj := factory().(*model.Partner)
			db.Create(obj)
			fmt.Printf("✅ 往来单位：%s（%s）\n", obj.Name, obj.Type)
			return *obj
		}
		fmt.Printf("⏭  往来单位：%s\n", v.Name)
		return *v
	}
	return nil
}

// ── 财务记录 ────────────────────────────────────────────

func createFinanceRecord(db *gorm.DB, shopID, partnerID, opID uint64,
	ftype string, amount, balance float64, refType string, refID uint64,
	date model.Date, remark string,
) {
	var f model.FinanceRecord
	if db.Where("shop_id = ? AND ref_type = ? AND ref_id = ? AND type = ?", shopID, refType, refID, ftype).First(&f).Error != nil {
		f = model.FinanceRecord{
			ShopID:     shopID,
			PartnerID:  &partnerID,
			Type:       ftype,
			Amount:     amount,
			Balance:    balance,
			RefType:    refType,
			RefID:      &refID,
			OperatorID: opID,
			RecordDate: date.Time,
			Remark:     remark,
		}
		db.Create(&f)
		fmt.Printf("✅ 财务记录：%s %.0f 元（%s）\n", ftype, amount, remark)
	}
}

// ── 工具函数 ────────────────────────────────────────────

func mustHash(plain string) string {
	b, err := bcrypt.GenerateFromPassword([]byte(plain), bcrypt.DefaultCost)
	if err != nil {
		stdlog.Fatalf("bcrypt 失败: %v", err)
	}
	return string(b)
}

func upsertNumberRule(db *gorm.DB, shopID uint64, ruleType, prefix string, currentNo int) {
	var r model.NumberRule
	if db.Where("shop_id = ? AND type = ?", shopID, ruleType).First(&r).Error != nil {
		r = model.NumberRule{ShopID: shopID, Type: ruleType, Prefix: prefix, CurrentNo: currentNo, DateFormat: "YYYYMMDD"}
		db.Create(&r)
		fmt.Printf("✅ 编号规则：%s → %s\n", ruleType, prefix)
	}
}