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
	}
	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 初始化示例业务数据（产品/客户/计划/支付网关），便于开发联调 // Logan.Li
func seedSampleData(db *gorm.DB) error {
	var productCount int64
	db.Model(&model.Product{}).Count(&productCount)
	if productCount > 0 {
		return nil
	}

	// 示例产品 // Logan.Li
	product := model.Product{
		Name:        "OpsX Tools Suite",
		Code:        "opsx-tools",
		Version:     "1.0.0",
		Description: "OpsX 工具集 - 一站式运维工具箱",
		Features:    `["CLI","GUI","Web Console","API"]`,
		Price:       99.00,
		PriceModel:  "subscription",
		Status:      1,
	}
	if err := db.Create(&product).Error; err != nil {
		return err
	}

	// 示例客户 // Logan.Li
	customer := model.Customer{
		Name:    "示例客户",
		Company: "Acme Inc.",
		Email:   "demo@acme.com",
		Phone:   "13800000000",
		Status:  1,
	}
	if err := db.Create(&customer).Error; err != nil {
		return err
	}

	// 示例定价计划（买断 + 月订阅 + 年订阅） // Logan.Li
	plans := []model.Plan{
		{ProductID: product.ID, Name: "个人永久版", PlanType: "perpetual", Price: 199, Currency: "USD", Duration: 0, MaxDevices: 1, Features: `["全部功能","永久使用","1 设备"]`, SortOrder: 1, Status: 1},
		{ProductID: product.ID, Name: "专业版（月）", PlanType: "monthly", Price: 19, Currency: "USD", Duration: 30, MaxDevices: 3, Features: `["全部功能","按月订阅","3 设备"]`, SortOrder: 2, Status: 1},
		{ProductID: product.ID, Name: "企业版（年）", PlanType: "yearly", Price: 199, Currency: "USD", Duration: 365, MaxDevices: 10, Features: `["全部功能","按年订阅优惠","10 设备","优先支持"]`, SortOrder: 3, Status: 1},
	}
	for i := range plans {
		if err := db.Create(&plans[i]).Error; err != nil {
			return err
		}
	}

	// 示例 License // Logan.Li
	now := time.Now()
	license := model.License{
		LicenseKey:     utils.GenerateLicenseKey(),
		CustomerID:     customer.ID,
		ProductID:      product.ID,
		Status:         model.LicenseStatusActive,
		StartDate:      now,
		EndDate:        now.AddDate(0, 0, 365),
		Duration:       365,
		MaxActivations: 3,
		Notes:          "示例授权，初始化生成",
	}
	if err := db.Create(&license).Error; err != nil {
		return err
	}

	// 示例支付网关配置（沙箱） // Logan.Li
	gateway := model.PaymentGatewayConfig{
		Gateway:     "creem",
		Enabled:     true,
		SandboxMode: true,
		Currency:    "USD",
		Priority:    1,
	}
	if err := db.Create(&gateway).Error; err != nil {
		return err
	}

	log.Println("[初始化] 已创建示例产品、客户、计划、License、支付网关")
	return nil
}