package db

import (
	"context"
	"log/slog"
	"time"

	"bj_power_wms/ent"

	"golang.org/x/crypto/bcrypt"
)

// SeedIfEmpty 首次启动时预置基础数据（区域/账号/演示物料与库存）
func SeedIfEmpty(client *ent.Client) error {
	ctx := context.Background()

	// 1. 区域
	zones, _ := client.Zone.Query().Count(ctx)
	if zones == 0 {
		for _, z := range []struct{ code, name string }{
			{"Z01", "待检区"},
			{"Z02", "合格品区"},
			{"Z03", "不合格品区"},
			{"Z04", "退货区"},
		} {
			client.Zone.Create().
				SetZoneCode(z.code).
				SetZoneName(z.name).
				SaveX(ctx)
		}
		slog.Info("seed: zones created")
	}

	// 2. 账号
	users, _ := client.User.Query().Count(ctx)
	if users == 0 {
		adminHash, _ := bcrypt.GenerateFromPassword([]byte("admin123"), bcrypt.DefaultCost)
		opHash, _ := bcrypt.GenerateFromPassword([]byte("123456"), bcrypt.DefaultCost)
		client.User.Create().
			SetUsername("admin").
			SetPassword(string(adminHash)).
			SetRealName("系统管理员").
			SetRole("admin").
			SaveX(ctx)
		client.User.Create().
			SetUsername("store1").
			SetPassword(string(opHash)).
			SetRealName("一号库房保管员").
			SetRole("operator").
			SetDept("库房").
			SaveX(ctx)
		client.User.Create().
			SetUsername("insp1").
			SetPassword(string(opHash)).
			SetRealName("质检员一号").
			SetRole("inspector").
			SetDept("质检").
			SaveX(ctx)
		slog.Info("seed: users created (admin/admin123, store1/123456, insp1/123456)")
	}

	// 3. 演示物料与库存
	materials, _ := client.Material.Query().Count(ctx)
	if materials == 0 {
		mats := []struct {
			code, name, spec, unit   string
			mode                     int
			mtype                    string
			isBatch, isSerial        bool
		}{
			{"GJ-BAN-001", "10mm钢板(结构件)", "2000x1000x10", "张", 1, "raw", true, false},
			{"GJ-GANGGUAN-002", "无缝钢管114x8", "114x8x6000", "根", 1, "raw", true, false},
			{"LJ-LUOSI-M16", "M16高强度螺栓", "M16x80 10.9级", "件", 1, "raw", true, false},
			{"JM-ZHOUCHENG-6020", "精密轴承6020", "6020-2RS", "套", 2, "raw", false, true},
			{"JM-DIANJI-750W", "伺服电机750W", "ECMA-C21307", "台", 2, "raw", false, true},
			{"BCP-JIEKOUTI", "接驳体半成品", "-", "件", 2, "semi", false, true},
		}
		for _, m := range mats {
			client.Material.Create().
				SetCode(m.code).
				SetName(m.name).
				SetNillableSpec(strPtrNil(m.spec)).
				SetNillableUnit(strPtrNil(m.unit)).
				SetManageMode(m.mode).
				SetIsBatchManaged(m.isBatch).
				SetIsSerialManaged(m.isSerial).
				SetMaterialType(m.mtype).
				SaveX(ctx)
		}

		// 演示批次（已检合格）
		today := time.Now().Format("2006-01-02")
		client.InventoryBatch.Create().
			SetBatchNo("B2026060100001").
			SetMaterialCode("GJ-BAN-001").
			SetNillableMaterialName(strPtrNil("10mm钢板(结构件)")).
			SetQuantity(120).SetLockedQty(0).
			SetNillableProductionDate(strPtrNil("2026-06-01")).
			SetNillableSupplier(strPtrNil("宝钢供应商")).
			SetQualityStatus("合格").
			SetNillableZoneCode(strPtrNil("Z02")).
			SaveX(ctx)
		client.InventoryBatch.Create().
			SetBatchNo("B2026060200034").
			SetMaterialCode("GJ-GANGGUAN-002").
			SetNillableMaterialName(strPtrNil("无缝钢管114x8")).
			SetQuantity(50).SetLockedQty(0).
			SetNillableProductionDate(strPtrNil(today)).
			SetNillableSupplier(strPtrNil("天津钢管")).
			SetQualityStatus("未检").
			SetNillableZoneCode(strPtrNil("Z01")).
			SaveX(ctx)

		// 演示 SN（在库）
		for i := 1; i <= 5; i++ {
			sn := "SN20260601001" + time.Now().Format("02")
			client.SerialNumber.Create().
				SetSnCode(sn+itoaPad(i)).
				SetMaterialCode("JM-ZHOUCHENG-6020").
				SetStatus("在库").
				SetQualityStatus("合格").
				SetNillableCurrentZone(strPtrNil("Z02")).
				SaveX(ctx)
		}
		slog.Info("seed: demo materials & stock created")
	}

	return nil
}

func strPtrNil(s string) *string {
	if s == "" {
		return nil
	}
	return &s
}

func itoaPad(n int) string {
	base := "000"
	return base[:len(base)-lenOfInt(n)] + intToStr(n)
}

func lenOfInt(n int) int {
	c := 1
	for n >= 10 {
		n /= 10
		c++
	}
	return c
}

func intToStr(n int) string {
	if n < 10 {
		return string(rune('0' + n))
	}
	return intToStr(n/10) + string(rune('0'+n%10))
}