package service

import (
	"context"
	"errors"
	"time"

	"order/dao"
	"order/model/dto"
	"order/model/entity"

	"github.com/gogf/gf/v2/util/gconv"
	"go.mongodb.org/mongo-driver/v2/bson"
)

type paymentConfig struct{}

// PaymentConfig 支付配置服务
var PaymentConfig = new(paymentConfig)

// CreatePaymentConfig 创建支付配置
func (s *paymentConfig) CreatePaymentConfig(ctx context.Context, req *dto.CreatePaymentConfigReq) (*dto.PaymentConfigResp, error) {
	// 1. 参数验证
	if req.TenantID == "" || req.PayMethod == "" {
		return nil, errors.New("必填参数不能为空")
	}

	// 2. 检查支付方式是否已存在
	exist, err := dao.PaymentConfig.GetByTenantAndMethod(ctx, req.TenantID, req.PayMethod)
	if err != nil {
		return nil, err
	}
	if exist != nil {
		return nil, errors.New("该支付方式已存在配置")
	}

	// 3. 创建配置实体
	config := parseConfigMap(req.PayMethod, req.Config)
	config.TenantId = req.TenantID
	config.Description = req.Remark
	config.Enabled = req.IsEnabled

	// 4. 保存配置
	if err := dao.PaymentConfig.Create(ctx, config); err != nil {
		return nil, err
	}

	// 5. 返回结果
	resp := &dto.PaymentConfigResp{
		ID:        config.Id.Hex(),
		TenantID:  gconv.String(config.TenantId),
		PayMethod: config.PayMethod,
		Config:    buildConfigMap(config),
		IsEnabled: config.Enabled,
		Remark:    config.Description,
		CreatedAt: time.Now(), // 暂时使用当前时间
		UpdatedAt: time.Now(),
	}

	return resp, nil
}

// UpdatePaymentConfig 更新支付配置
func (s *paymentConfig) UpdatePaymentConfig(ctx context.Context, req *dto.UpdatePaymentConfigReq) (*dto.PaymentConfigResp, error) {
	// 1. 参数验证
	if req.ID == "" || req.TenantID == "" {
		return nil, errors.New("必填参数不能为空")
	}

	// 2. 查询配置
	objectID, err := bson.ObjectIDFromHex(req.ID)
	if err != nil {
		return nil, errors.New("无效的配置ID")
	}

	config, err := dao.PaymentConfig.GetByID(ctx, objectID)
	if err != nil {
		return nil, err
	}
	if config == nil {
		return nil, errors.New("支付配置不存在")
	}

	// 3. 检查是否是租户自己的配置
	if config.TenantId != req.TenantID {
		return nil, errors.New("无权限操作该配置")
	}

	// 4. 更新配置实体
	config.ConfigName = req.ConfigName
	config.Description = req.Remark
	config.Enabled = req.IsEnabled

	// 解析配置参数
	parseConfigMapToEntity(config.PayMethod, req.Config, config)

	// 5. 更新配置
	if err := dao.PaymentConfig.Update(ctx, config); err != nil {
		return nil, err
	}

	// 6. 返回结果
	resp := &dto.PaymentConfigResp{
		ID:         config.Id.Hex(),
		TenantID:   gconv.String(config.TenantId),
		PayMethod:  config.PayMethod,
		ConfigName: config.ConfigName,
		Remark:     config.Description,
		IsEnabled:  config.Enabled,
		Config:     convertEntityToConfigMap(config),
		CreatedAt:  time.Unix(0, 0), // 实体中没有时间字段，使用默认值
		UpdatedAt:  time.Now(),
	}

	return resp, nil
}

// GetPaymentConfig 获取支付配置
func (s *paymentConfig) GetPaymentConfig(ctx context.Context, req *dto.QueryPaymentConfigReq) (*dto.PaymentConfigResp, error) {
	// 1. 参数验证
	if req.TenantID == "" {
		return nil, errors.New("租户ID不能为空")
	}

	var config *entity.PaymentConfig
	var err error

	// 2. 查询配置
	if req.PayMethod != "" {
		// 按租户和支付方式查询
		config, err = dao.PaymentConfig.GetByTenantAndMethod(ctx, req.TenantID, req.PayMethod)
	} else {
		// 只按租户查询（获取所有支付方式配置）
		configs, err := dao.PaymentConfig.GetByTenantID(ctx, req.TenantID)
		if err != nil {
			return nil, err
		}
		if len(configs) > 0 {
			config = &configs[0] // 返回第一个配置作为默认
		}
	}

	if err != nil {
		return nil, err
	}
	if config == nil {
		return nil, errors.New("支付配置不存在")
	}

	// 3. 返回结果
	resp := &dto.PaymentConfigResp{
		ID:         config.Id.Hex(),
		TenantID:   gconv.String(config.TenantId),
		PayMethod:  config.PayMethod,
		ConfigName: config.ConfigName,
		Remark:     config.Description,
		IsEnabled:  config.Enabled,
		Config:     convertEntityToConfigMap(config),
		CreatedAt:  time.Unix(0, 0),
		UpdatedAt:  time.Now(),
	}

	return resp, nil
}

// GetPaymentConfigList 获取支付配置列表
func (s *paymentConfig) GetPaymentConfigList(ctx context.Context, tenantID string) ([]dto.PaymentConfigResp, error) {
	// 1. 参数验证
	if tenantID == "" {
		return nil, errors.New("租户ID不能为空")
	}

	// 2. 查询配置列表
	configs, err := dao.PaymentConfig.GetByTenantID(ctx, tenantID)
	if err != nil {
		return nil, err
	}

	// 3. 转换为响应格式
	var resp []dto.PaymentConfigResp
	for _, config := range configs {
		resp = append(resp, dto.PaymentConfigResp{
			ID:         config.Id.Hex(),
			TenantID:   gconv.String(config.TenantId),
			PayMethod:  config.PayMethod,
			ConfigName: config.ConfigName,
			Remark:     config.Description,
			IsEnabled:  config.Enabled,
			Config:     convertEntityToConfigMap(&config),
			CreatedAt:  time.Unix(0, 0),
			UpdatedAt:  time.Now(),
		})
	}

	return resp, nil
}

// DeletePaymentConfig 删除支付配置
func (s *paymentConfig) DeletePaymentConfig(ctx context.Context, tenantID, configID string) error {
	// 1. 参数验证
	if tenantID == "" || configID == "" {
		return errors.New("必填参数不能为空")
	}

	// 2. 查询配置
	objectID, err := bson.ObjectIDFromHex(configID)
	if err != nil {
		return errors.New("无效的配置ID")
	}

	config, err := dao.PaymentConfig.GetByID(ctx, objectID)
	if err != nil {
		return err
	}
	if config == nil {
		return errors.New("支付配置不存在")
	}

	// 3. 检查是否是租户自己的配置
	if config.TenantId != tenantID {
		return errors.New("无权限操作该配置")
	}

	// 4. 删除配置
	return dao.PaymentConfig.Delete(ctx, objectID)
}

// EnablePaymentConfig 启用支付配置
func (s *paymentConfig) EnablePaymentConfig(ctx context.Context, tenantID, configID string) error {
	return s.updateConfigStatus(ctx, tenantID, configID, true)
}

// DisablePaymentConfig 禁用支付配置
func (s *paymentConfig) DisablePaymentConfig(ctx context.Context, tenantID, configID string) error {
	return s.updateConfigStatus(ctx, tenantID, configID, false)
}

// updateConfigStatus 更新配置状态
func (s *paymentConfig) updateConfigStatus(ctx context.Context, tenantID, configID string, enabled bool) error {
	// 1. 参数验证
	if tenantID == "" || configID == "" {
		return errors.New("必填参数不能为空")
	}

	// 2. 查询配置
	objectID, err := bson.ObjectIDFromHex(configID)
	if err != nil {
		return errors.New("无效的配置ID")
	}

	config, err := dao.PaymentConfig.GetByID(ctx, objectID)
	if err != nil {
		return err
	}
	if config == nil {
		return errors.New("支付配置不存在")
	}

	// 3. 检查是否是租户自己的配置
	if config.TenantId != tenantID {
		return errors.New("无权限操作该配置")
	}

	// 4. 更新状态
	config.Enabled = enabled

	return dao.PaymentConfig.Update(ctx, config)
}

// WechatConfig 微信支付配置服务
var WechatConfig = new(wechatConfig)

type wechatConfig struct{}

// GetWechatConfig 获取微信支付配置
func (s *wechatConfig) GetWechatConfig(ctx context.Context, tenantID string) (*dto.WechatConfig, error) {
	// 1. 获取微信支付配置
	resp, err := PaymentConfig.GetPaymentConfig(ctx, &dto.QueryPaymentConfigReq{
		TenantID:  tenantID,
		PayMethod: "wechat",
	})
	if err != nil {
		return nil, err
	}

	// 2. 转换为微信配置结构体
	configMap := resp.Config

	wechatConfig := &dto.WechatConfig{
		ID:            resp.ID,
		TenantID:      resp.TenantID,
		ConfigName:    resp.ConfigName,
		AppID:         getString(configMap, "app_id"),
		MchID:         getString(configMap, "mch_id"),
		APIKey:        getString(configMap, "api_key"),
		NotifyURL:     getString(configMap, "notify_url"),
		ReturnURL:     getString(configMap, "return_url"),
		CertPath:      getString(configMap, "cert_path"),
		KeyPath:       getString(configMap, "key_path"),
		Sandbox:       getBool(configMap, "sandbox"),
		GatewayURL:    getString(configMap, "gateway_url"),
		SupportNative: getBool(configMap, "support_native"),
		SupportJSAPI:  getBool(configMap, "support_jsapi"),
		SupportAPP:    getBool(configMap, "support_app"),
		SupportH5:     getBool(configMap, "support_h5"),
	}

	return wechatConfig, nil
}

// AlipayConfig 支付宝支付配置服务
var AlipayConfig = new(alipayConfig)

type alipayConfig struct{}

// GetAlipayConfig 获取支付宝支付配置
func (s *alipayConfig) GetAlipayConfig(ctx context.Context, tenantID string) (*dto.AlipayConfig, error) {
	// 1. 获取支付宝支付配置
	resp, err := PaymentConfig.GetPaymentConfig(ctx, &dto.QueryPaymentConfigReq{
		TenantID:  tenantID,
		PayMethod: "alipay",
	})
	if err != nil {
		return nil, err
	}

	// 2. 转换为支付宝配置结构体
	configMap := resp.Config

	alipayConfig := &dto.AlipayConfig{
		ID:              resp.ID,
		TenantID:        resp.TenantID,
		ConfigName:      resp.ConfigName,
		AppID:           getString(configMap, "app_id"),
		NotifyURL:       getString(configMap, "notify_url"),
		ReturnURL:       getString(configMap, "return_url"),
		AppPrivateKey:   getString(configMap, "app_private_key"),
		AlipayPublicKey: getString(configMap, "alipay_public_key"),
		Sandbox:         getBool(configMap, "sandbox"),
		GatewayURL:      getString(configMap, "gateway_url"),
		SupportNative:   getBool(configMap, "support_native"),
		SupportJSAPI:    getBool(configMap, "support_jsapi"),
		SupportAPP:      getBool(configMap, "support_app"),
		SupportH5:       getBool(configMap, "support_h5"),
	}

	return alipayConfig, nil
}

// getString 从map中获取string值
func getString(m map[string]interface{}, key string) string {
	if val, ok := m[key]; ok {
		if str, ok := val.(string); ok {
			return str
		}
	}
	return ""
}

// getBool 从map中获取bool值
func getBool(m map[string]interface{}, key string) bool {
	if val, ok := m[key]; ok {
		if b, ok := val.(bool); ok {
			return b
		}
	}
	return false
}

// buildConfigMap 将PaymentConfig结构体转换为map
func buildConfigMap(config *entity.PaymentConfig) map[string]interface{} {
	result := map[string]interface{}{
		"app_id":            config.AppID,
		"mch_id":            config.MchID,
		"api_key":           config.APIKey,
		"notify_url":        config.NotifyURL,
		"return_url":        config.ReturnURL,
		"cert_path":         config.CertPath,
		"key_path":          config.KeyPath,
		"app_private_key":   config.AppPrivateKey,
		"alipay_public_key": config.AlipayPublicKey,
		"sandbox":           config.Sandbox,
		"gateway_url":       config.GatewayURL,
		"support_native":    config.SupportNative,
		"support_jsapi":     config.SupportJSAPI,
		"support_app":       config.SupportAPP,
		"support_h5":        config.SupportH5,
	}
	return result
}

// parseConfigMap 将map转换为PaymentConfig结构体
func parseConfigMap(payMethod string, configMap map[string]interface{}) *entity.PaymentConfig {
	config := &entity.PaymentConfig{
		PayMethod:       payMethod,
		ConfigName:      payMethod + "配置",
		AppID:           getString(configMap, "app_id"),
		MchID:           getString(configMap, "mch_id"),
		APIKey:          getString(configMap, "api_key"),
		NotifyURL:       getString(configMap, "notify_url"),
		ReturnURL:       getString(configMap, "return_url"),
		CertPath:        getString(configMap, "cert_path"),
		KeyPath:         getString(configMap, "key_path"),
		AppPrivateKey:   getString(configMap, "app_private_key"),
		AlipayPublicKey: getString(configMap, "alipay_public_key"),
		Sandbox:         getBool(configMap, "sandbox"),
		GatewayURL:      getString(configMap, "gateway_url"),
		SupportNative:   getBool(configMap, "support_native"),
		SupportJSAPI:    getBool(configMap, "support_jsapi"),
		SupportAPP:      getBool(configMap, "support_app"),
		SupportH5:       getBool(configMap, "support_h5"),
	}
	return config
}

// parseConfigMapToEntity 将map中的配置更新到实体中
func parseConfigMapToEntity(payMethod string, configMap map[string]interface{}, config *entity.PaymentConfig) {
	config.AppID = getString(configMap, "app_id")
	config.MchID = getString(configMap, "mch_id")
	config.APIKey = getString(configMap, "api_key")
	config.NotifyURL = getString(configMap, "notify_url")
	config.ReturnURL = getString(configMap, "return_url")
	config.CertPath = getString(configMap, "cert_path")
	config.KeyPath = getString(configMap, "key_path")
	config.AppPrivateKey = getString(configMap, "app_private_key")
	config.AlipayPublicKey = getString(configMap, "alipay_public_key")
	config.Sandbox = getBool(configMap, "sandbox")
	config.GatewayURL = getString(configMap, "gateway_url")
	config.SupportNative = getBool(configMap, "support_native")
	config.SupportJSAPI = getBool(configMap, "support_jsapi")
	config.SupportAPP = getBool(configMap, "support_app")
	config.SupportH5 = getBool(configMap, "support_h5")
}

// convertEntityToConfigMap 将实体转换为配置map
func convertEntityToConfigMap(config *entity.PaymentConfig) map[string]interface{} {
	return buildConfigMap(config)
}