package database

import (
	"backend/internal/model"
	"backend/utils"
	"log"
	"time"

	"gorm.io/gorm"
)

const (
	defaultAdminUsername = "admin"
	defaultAdminPassword = "admin"
)

// SeedDefaults 初始化默认数据：管理员账号 + 系统设置 + 示例业务数据 // Logan.Li
func SeedDefaults(db *gorm.DB) error {
	if err := seedAdmin(db); err != nil {
		return err
	}
	if err := seedSetting(db); err != nil {
		return err
	}
	if err := seedSampleData(db); err != nil {
		return err
	}
	if err := ensureOpsXShellPlanPricing(db); err != nil {
		return err
	}
	if err := ensureWaffoPaymentGateway(db); err != nil {
		return err
	}
	return nil
}

// seedAdmin 初始化默认管理员账号（仅在不存在时创建） // Logan.Li
func seedAdmin(db *gorm.DB) error {
	var count int64
	db.Model(&model.User{}).Where("username = ?", defaultAdminUsername).Count(&count)
	if count > 0 {
		return nil
	}

	admin := model.User{
		Username: defaultAdminUsername,
		Password: utils.HashPassword(defaultAdminPassword),
		Email:    "admin@opsx-licence.local",
		Role:     "admin",
		IsActive: true,
	}
	if err := db.Create(&admin).Error; err != nil {
		return err
	}
	log.Printf("[初始化] 已创建默认管理员账号: %s / %s（请尽快修改密码）", defaultAdminUsername, defaultAdminPassword)
	return nil
}

// seedSetting 初始化默认系统设置（仅创建一次） // Logan.Li
func seedSetting(db *gorm.DB) error {
	var count int64
	db.Model(&model.Setting{}).Count(&count)
	if count > 0 {
		return nil
	}

	setting := model.Setting{
		SystemName:            "opsx-licence",
		DefaultDuration:       365,
		DefaultMaxActivations: 1,
		ExpireReminderDays:    7,
		APIRateLimit:          1000,
		LogRetentionDays:      365,
	}
	if err := db.Create(&setting).Error; err != nil {
		return err
	}
	log.Println("[初始化] 已创建默认系统设置")
	return nil
}

// seedSampleData 初始化 OpsXShell 产品 / 计划 / Waffo 网关，便于桌面端联调 // Logan.Li
func seedSampleData(db *gorm.DB) error {
	var productCount int64
	db.Model(&model.Product{}).Count(&productCount)
	if productCount > 0 {
		return nil
	}

	product := model.Product{
		Name:        "OpsXShell",
		Code:        "opsxshell",
		Version:     "2.0.0",
		Description: "OpsXShell Pro — SSH / SFTP / RDP / VNC / AI",
		Features:    `["ssh","sftp","rdp","vnc","ai","portForward","proxy","serial","batchExec"]`,
		Price:       199.00,
		PriceModel:  "perpetual",
		Status:      1,
	}
	if err := db.Create(&product).Error; err != nil {
		return err
	}

	customer := model.Customer{
		Name:    "Demo",
		Company: "OpsX",
		Email:   "demo@opsxshell.local",
		Status:  1,
	}
	if err := db.Create(&customer).Error; err != nil {
		return err
	}

	plans := []model.Plan{
		{
			ProductID:  product.ID,
			Name:       "体验",
			PlanType:   "trial",
			Price:      0,
			Currency:   "CNY",
			Duration:   180,
			MaxDevices: 1,
			Features:   `["专业功能","体验","1 设备"]`,
			SortOrder:  0,
			Status:     1,
		},
		{
			ProductID:  product.ID,
			Name:       "包年",
			PlanType:   "yearly",
			Price:      99,
			Currency:   "CNY",
			Duration:   365,
			MaxDevices: 2,
			Features:   `["专业功能","包年","2 设备"]`,
			SortOrder:  1,
			Status:     1,
		},
		{
			ProductID:  product.ID,
			Name:       "永久",
			PlanType:   "perpetual",
			Price:      199,
			Currency:   "CNY",
			Duration:   0,
			MaxDevices: 5,
			Features:   `["专业功能","永久授权","5 设备"]`,
			SortOrder:  2,
			Status:     1,
		},
	}
	for i := range plans {
		if err := db.Create(&plans[i]).Error; err != nil {
			return err
		}
	}

	now := time.Now()
	license := model.License{
		LicenseKey:     utils.GenerateLicenseKey(),
		CustomerID:     customer.ID,
		ProductID:      product.ID,
		Status:         model.LicenseStatusActive,
		StartDate:      now,
		EndDate:        model.PermanentEndDate,
		Duration:       0,
		MaxActivations: 5,
		Notes:          "开发示例授权",
	}
	if err := db.Create(&license).Error; err != nil {
		return err
	}

	gateway := model.PaymentGatewayConfig{
		Gateway:     "waffo",
		Enabled:     true,
		SandboxMode: true,
		Currency:    "USD",
		Priority:    1,
	}
	if err := db.Create(&gateway).Error; err != nil {
		return err
	}

	log.Printf("[初始化] OpsXShell 产品已就绪 (code=opsxshell)，示例 License: %s", license.LicenseKey)
	return nil
}

// ensureOpsXShellPlanPricing ensures opsxshell product exists and syncs plan price/seats. // Logan.Li
func ensureOpsXShellPlanPricing(db *gorm.DB) error {
	var product model.Product
	err := db.Where("code = ?", "opsxshell").First(&product).Error
	if err != nil {
		// Prefer renaming legacy demo product so existing plans/licenses stay attached.
		if renameErr := db.Where("code = ?", "opsx-tools").First(&product).Error; renameErr == nil {
			product.Code = "opsxshell"
			product.Name = "OpsXShell"
			product.Description = "OpsXShell Pro — SSH / SFTP / RDP / VNC / AI"
			product.Features = `["ssh","sftp","rdp","vnc","ai","portForward","proxy","serial","batchExec"]`
			product.Price = 199
			product.PriceModel = "perpetual"
			product.Status = 1
			if err := db.Save(&product).Error; err != nil {
				return err
			}
			log.Println("[初始化] 已将 opsx-tools 迁移为 opsxshell")
		} else {
			product = model.Product{
				Name:        "OpsXShell",
				Code:        "opsxshell",
				Version:     "2.0.0",
				Description: "OpsXShell Pro — SSH / SFTP / RDP / VNC / AI",
				Features:    `["ssh","sftp","rdp","vnc","ai","portForward","proxy","serial","batchExec"]`,
				Price:       199,
				PriceModel:  "perpetual",
				Status:      1,
			}
			if err := db.Create(&product).Error; err != nil {
				return err
			}
			log.Println("[初始化] 已创建 opsxshell 产品")
		}
	}
	type planSpec struct {
		planType   string
		name       string
		price      float64
		currency   string
		duration   int
		maxDevices int
		features   string
		sortOrder  int
	}
	updates := []planSpec{
		{"trial", "体验", 0, "CNY", 180, 1, "[\"专业功能\",\"体验\",\"1 设备\"]", 0},
		{"yearly", "包年", 99, "CNY", 365, 2, "[\"专业功能\",\"包年\",\"2 设备\"]", 1},
		{"perpetual", "永久", 199, "CNY", 0, 5, "[\"专业功能\",\"永久授权\",\"5 设备\"]", 2},
	}
	for _, u := range updates {
		var plan model.Plan
		err := db.Where("product_id = ? AND plan_type = ?", product.ID, u.planType).First(&plan).Error
		if err == nil {
			continue // 已存在：尊重管理员运行时修改，不再覆盖 // Logan.Li
		}
		plan = model.Plan{
			ProductID:  product.ID,
			Name:       u.name,
			PlanType:   u.planType,
			Price:      u.price,
			Currency:   u.currency,
			Duration:   u.duration,
			MaxDevices: u.maxDevices,
			Features:   u.features,
			SortOrder:  u.sortOrder,
			Status:     1,
		}
		if err := db.Create(&plan).Error; err != nil {
			return err
		}
	}
	log.Printf("[初始化] OpsXShell 套餐已确保存在（仅新建，不覆盖已有价格）")
	return nil
}

// ensureWaffoPaymentGateway makes pancake.waffo.ai the preferred checkout gateway. // Logan.Li
func ensureWaffoPaymentGateway(db *gorm.DB) error {
	var existing model.PaymentGatewayConfig
	err := db.Where("gateway = ?", "waffo").First(&existing).Error
	if err != nil {
		gw := model.PaymentGatewayConfig{
			Gateway:     "waffo",
			Enabled:     true,
			SandboxMode: true,
			Currency:    "CNY",
			Priority:    0,
		}
		if err := db.Create(&gw).Error; err != nil {
			return err
		}
		log.Println("[初始化] 已创建 Waffo 支付网关（默认沙箱，可在后台改 live）")
	}
	// 已存在则不覆盖 Enabled/SandboxMode，尊重管理员配置 // Logan.Li
	if err := db.Model(&model.PaymentGatewayConfig{}).
		Where("gateway <> ? AND enabled = ?", "waffo", true).
		Update("priority", 100).Error; err != nil {
		return err
	}
	return nil
}