package database

import (
	"log"

	"soul-api/internal/model"

	"gorm.io/driver/mysql"
	"gorm.io/gorm"
)

var db *gorm.DB

// Init 使用 DSN 连接 MySQL，供 handler 通过 DB() 使用
func Init(dsn string) error {
	var err error
	db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
	if err != nil {
		return err
	}
	if err := db.AutoMigrate(&model.WechatCallbackLog{}); err != nil {
		log.Printf("database: wechat_callback_logs migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.Withdrawal{}); err != nil {
		log.Printf("database: withdrawals migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.MatchRecord{}); err != nil {
		log.Printf("database: match_records migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.UserAddress{}); err != nil {
		log.Printf("database: user_addresses migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.VipRole{}); err != nil {
		log.Printf("database: vip_roles migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.Order{}); err != nil {
		log.Printf("database: orders migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.Mentor{}); err != nil {
		log.Printf("database: mentors migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.MentorConsultation{}); err != nil {
		log.Printf("database: mentor_consultations migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.AuthorConfig{}); err != nil {
		log.Printf("database: author_config migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.AdminUser{}); err != nil {
		log.Printf("database: admin_users migrate warning: %v", err)
	}
	if err := db.AutoMigrate(&model.UserRule{}); err != nil {
		log.Printf("database: user_rules migrate warning: %v", err)
	}
	seedDefaultRules(db)
	log.Println("database: connected")
	return nil
}

// DB 返回全局 *gorm.DB，仅在 Init 成功后调用
func DB() *gorm.DB {
	return db
}

// seedDefaultRules 幂等写入默认用户旅程规则
func seedDefaultRules(db *gorm.DB) {
	var count int64
	db.Model(&model.UserRule{}).Count(&count)
	if count > 0 {
		return // 已有规则，跳过
	}
	defaults := []model.UserRule{
		{Title: "注册完成 → 填写头像", Description: "用户完成注册后，引导填写头像和昵称，提升个人信息完整度", Trigger: "注册", Sort: 10, Enabled: true},
		{Title: "完成匹配 → 补充个人资料", Description: "用户完成 Soul 派对房匹配后，引导填写 MBTI、行业、职位等详细信息", Trigger: "完成匹配", Sort: 20, Enabled: true},
		{Title: "首次浏览章节 → 绑定手机号", Description: "用户点击阅读收费章节时，引导绑定手机号以完成身份验证", Trigger: "点击收费章节", Sort: 30, Enabled: true},
		{Title: "付款 ¥1980 → 填写完整信息", Description: "购买全书（1980元）后，需填写：真实姓名、联系方式、所在行业、MBTI，以便进入 VIP 群", Trigger: "完成付款", Sort: 40, Enabled: true},
		{Title: "加入派对房 → 填写项目介绍", Description: "进入 Soul 派对房前，引导填写个人项目介绍和核心需求，便于精准匹配", Trigger: "加入派对房", Sort: 50, Enabled: true},
		{Title: "浏览 5 个章节 → 分享推广", Description: "用户累计阅读 5 个章节后，触发分享引导，邀请好友可获得收益", Trigger: "累计浏览5章节", Sort: 60, Enabled: true},
		{Title: "绑定微信 → 开启分销", Description: "绑定微信后，提示用户开启分销功能，生成专属推广码", Trigger: "绑定微信", Sort: 70, Enabled: true},
		{Title: "收益达到 ¥50 → 申请提现", Description: "累计分销收益超过 50 元时，引导用户申请提现", Trigger: "收益满50元", Sort: 80, Enabled: true},
		{Title: "完善存客宝信息 → 进入流量池", Description: "引导用户授权存客宝信息同步，进入对应微信流量池，获得精准服务", Trigger: "手动触发", Sort: 90, Enabled: true},
		{Title: "浏览导师主页 → 预约咨询", Description: "用户浏览导师详情页超过 30 秒，引导预约一对一咨询", Trigger: "浏览导师页", Sort: 100, Enabled: true},
	}
	if err := db.CreateInBatches(&defaults, len(defaults)).Error; err != nil {
		log.Printf("database: seed user_rules warning: %v", err)
	}
}