package initialize

import (
	"errors"
	"fmt"

	"gorm.io/gorm"
	"wails-app/internal/dao"
	"wails-app/internal/global"
	utils "wails-app/internal/pkg"
)

const (
	pofSimulatorDeviceID       = "POF-SIM-01"
	pofSimulatorUsername       = "admin"
	pofSimulatorPassword       = "admin"
	legacyPOFSimulatorUsername = "pof-sim"
)

// EnsureCentralPaymentConfiguration creates the POF payment entry and a local
// simulator credential. Real equipment must use a separately created device.
func EnsureCentralPaymentConfiguration() error {
	db := global.GVA_DB
	if db == nil {
		return nil
	}
	if err := db.AutoMigrate(&dao.CentralPaymentDevice{}, &dao.CentralPaymentToken{}, &dao.CentralPaymentRequestLog{}); err != nil {
		return fmt.Errorf("初始化中央缴费机表失败: %w", err)
	}

	var entry dao.PaymentEntryConfig
	err := db.Where("code = ?", "central_payment_machine").First(&entry).Error
	if errors.Is(err, gorm.ErrRecordNotFound) {
		entry = dao.PaymentEntryConfig{
			Code: "central_payment_machine", Name: "中央缴费机", Enabled: true, Sort: 30,
			IsSystem: true, Description: "POF 标准协议中央缴费机发起的支付",
		}
		if err := db.Create(&entry).Error; err != nil {
			return fmt.Errorf("初始化中央缴费机支付入口失败: %w", err)
		}
	} else if err != nil {
		return err
	}
	for index, methodCode := range []string{"cash", "pos"} {
		var relationCount int64
		if err := db.Model(&dao.PaymentEntryMethod{}).Where("entry_code = ? AND method_code = ?", entry.Code, methodCode).Count(&relationCount).Error; err != nil {
			return err
		}
		if relationCount == 0 {
			if err := db.Create(&dao.PaymentEntryMethod{EntryCode: entry.Code, MethodCode: methodCode, Sort: index * 10}).Error; err != nil {
				return fmt.Errorf("初始化中央缴费机支付方式失败: %w", err)
			}
		}
	}

	var device dao.CentralPaymentDevice
	err = db.Where("device_id = ?", pofSimulatorDeviceID).First(&device).Error
	if errors.Is(err, gorm.ErrRecordNotFound) {
		device = dao.CentralPaymentDevice{
			DeviceID: pofSimulatorDeviceID, Username: pofSimulatorUsername,
			PasswordHash: utils.BcryptHash(pofSimulatorPassword), Enabled: true,
			PaymentEntry: "central_payment_machine", Description: "仅用于本地 POF 模拟桩联调，真机启用前应禁用或删除",
		}
		if err := db.Create(&device).Error; err != nil {
			return fmt.Errorf("初始化 POF 模拟设备失败: %w", err)
		}
	} else if err != nil {
		return err
	} else if device.Username == legacyPOFSimulatorUsername {
		if err := db.Model(&device).Updates(map[string]interface{}{
			"username":      pofSimulatorUsername,
			"password_hash": utils.BcryptHash(pofSimulatorPassword),
		}).Error; err != nil {
			return fmt.Errorf("升级 POF 模拟设备登录凭据失败: %w", err)
		}
	}
	return nil
}