package model

import (
	"atsflare/common"
	"github.com/glebarez/sqlite"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"log/slog"
	"os"
)

var DB *gorm.DB

func migrateProxyRouteEnableHTTPSColumn(db *gorm.DB) error {
	if !db.Migrator().HasTable(&ProxyRoute{}) {
		return nil
	}
	if db.Migrator().HasColumn(&ProxyRoute{}, "enable_https") || !db.Migrator().HasColumn(&ProxyRoute{}, "enable_http_s") {
		return nil
	}
	return db.Migrator().RenameColumn(&ProxyRoute{}, "enable_http_s", "enable_https")
}

func createRootAccountIfNeed() error {
	var user User
	//if user.Status != common.UserStatusEnabled {
	if err := DB.First(&user).Error; err != nil {
		slog.Info("no user exists, create a root user", "username", "root")
		hashedPassword, err := common.Password2Hash("123456")
		if err != nil {
			return err
		}
		rootUser := User{
			Username:    "root",
			Password:    hashedPassword,
			Role:        common.RoleRootUser,
			Status:      common.UserStatusEnabled,
			DisplayName: "Root User",
		}
		DB.Create(&rootUser)
	}
	return nil
}

func CountTable(tableName string) (num int64) {
	DB.Table(tableName).Count(&num)
	return
}

func InitDB() (err error) {
	var db *gorm.DB
	if os.Getenv("SQL_DSN") != "" {
		// Use MySQL
		db, err = gorm.Open(mysql.Open(os.Getenv("SQL_DSN")), &gorm.Config{
			PrepareStmt: true, // precompile SQL
		})
	} else {
		// Use SQLite
		db, err = gorm.Open(sqlite.Open(common.SQLitePath), &gorm.Config{
			PrepareStmt: true, // precompile SQL
		})
		slog.Info("SQL_DSN not set, using SQLite as database")
	}
	if err == nil {
		DB = db
		if err = migrateProxyRouteEnableHTTPSColumn(db); err != nil {
			return err
		}
		err := db.AutoMigrate(&File{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&User{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&Option{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&ProxyRoute{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&ConfigVersion{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&Node{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&NodeSystemProfile{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&ApplyLog{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&NodeMetricSnapshot{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&NodeRequestReport{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&NodeHealthEvent{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&TLSCertificate{})
		if err != nil {
			return err
		}
		err = db.AutoMigrate(&ManagedDomain{})
		if err != nil {
			return err
		}
		err = createRootAccountIfNeed()
		return err
	} else {
		slog.Error("open database failed", "error", err)
		os.Exit(1)
	}
	return err
}

func CloseDB() error {
	sqlDB, err := DB.DB()
	if err != nil {
		return err
	}
	err = sqlDB.Close()
	return err
}