package dict

import (
	api_feature "cid/consts/api-feature"
	dao "cid/dao/dict"
	dto "cid/model/dto/dict"
	entity "cid/model/entity/dict"
	"context"
	"strconv"
	"time"

	"github.com/gogf/gf/v2/util/gconv"
	"github.com/olekukonko/errors"
)

type datasourcePlatformService struct{}

// DatasourcePlatform 数据源平台服务
var DatasourcePlatform = new(datasourcePlatformService)

// Create 创建数据源平台
func (s *datasourcePlatformService) Create(ctx context.Context, req *dto.CreateDatasourcePlatformReq) (res *dto.CreateDatasourcePlatformRes, err error) {
	// 检查平台编码是否重复
	exists, err := dao.DatasourcePlatform.ExistsByPlatformCode(ctx, req.PlatformCode)
	if err != nil {
		return nil, err
	}
	if exists {
		return nil, errors.New("平台编码已存在")
	}

	// 验证认证类型相关的必填字段
	if err = s.validateAuthFields(req); err != nil {
		return nil, err
	}

	// 设置创建时间为当前时间
	if req.CreatedAt == "" {
		req.CreatedAt = strconv.FormatInt(time.Now().Unix(), 10)
	}
	req.UpdatedAt = req.CreatedAt

	// 插入数据库
	id, err := dao.DatasourcePlatform.Insert(ctx, req)
	if err != nil {
		return nil, err
	}

	res = &dto.CreateDatasourcePlatformRes{
		Id: id,
	}
	return res, nil
}

// List 获取数据源平台列表
func (s *datasourcePlatformService) List(ctx context.Context, req *dto.ListDatasourcePlatformReq) (res *dto.ListDatasourcePlatformRes, err error) {
	platformList, total, err := dao.DatasourcePlatform.List(ctx, req)
	if err != nil {
		return nil, err
	}

	// 组装响应数据
	list := make([]dto.DatasourcePlatformItem, 0, len(platformList))
	for _, item := range platformList {
		list = append(list, dto.DatasourcePlatformItem{
			Id:                 item.ID,
			PlatformCode:       item.PlatformCode,
			PlatformName:       item.PlatformName,
			Description:        item.Description,
			Status:             api_feature.PlatformStatus(item.Status),
			StatusName:         s.getStatusName(api_feature.PlatformStatus(item.Status)),
			ApiBaseUrl:         item.ApiBaseUrl,
			AuthType:           item.AuthType,
			AuthTypeName:       s.getAuthTypeName(item.AuthType),
			RateLimitPerMinute: item.RateLimitPerMinute,
			RateLimitPerHour:   item.RateLimitPerHour,
			ConcurrencyLimit:   item.ConcurrencyLimit,
			RequestTimeoutMs:   item.RequestTimeoutMs,
			MaxRetries:         item.MaxRetries,
			RetryDelayMs:       item.RetryDelayMs,
			CreatedBy:          item.CreatedBy,
			CreatedAt:          item.CreatedAt.Unix(),
			UpdatedBy:          item.UpdatedBy,
			UpdatedAt:          item.UpdatedAt.Unix(),
		})
	}

	res = &dto.ListDatasourcePlatformRes{
		List:  list,
		Total: total,
	}
	return res, nil
}

// GetOne 获取单个数据源平台
func (s *datasourcePlatformService) GetOne(ctx context.Context, req *dto.GetDatasourcePlatformReq) (res *dto.GetDatasourcePlatformRes, err error) {
	platform, err := dao.DatasourcePlatform.GetOne(ctx, req)
	if err != nil {
		return nil, err
	}
	if platform == nil {
		return nil, errors.New("数据源平台不存在")
	}

	var platformEntity *entity.DatasourcePlatform
	if err = gconv.Struct(platform, &platformEntity); err != nil {
		return nil, err
	}

	// 隐藏敏感信息
	platformEntity.Token = ""
	platformEntity.ClientSecret = ""
	platformEntity.ApiKey = ""

	return &dto.GetDatasourcePlatformRes{
		DatasourcePlatform: platformEntity,
	}, nil
}

// GetByPlatformCode 根据平台编码获取数据源平台
func (s *datasourcePlatformService) GetByPlatformCode(ctx context.Context, platformCode string) (res *entity.DatasourcePlatform, err error) {
	platform, err := dao.DatasourcePlatform.GetByPlatformCode(ctx, platformCode)
	if err != nil {
		return nil, err
	}
	if platform == nil {
		return nil, errors.New("数据源平台不存在")
	}
	return platform, nil
}

// Update 更新数据源平台
func (s *datasourcePlatformService) Update(ctx context.Context, req *dto.UpdateDatasourcePlatformReq) (err error) {
	// 检查平台是否存在
	exist, err := dao.DatasourcePlatform.GetOne(ctx, &dto.GetDatasourcePlatformReq{Id: req.Id})
	if err != nil {
		return err
	}
	if exist == nil {
		return errors.New("数据源平台不存在")
	}

	// 如果修改了平台编码,检查新编码是否重复
	if req.PlatformCode != "" && req.PlatformCode != exist.PlatformCode {
		exists, err := dao.DatasourcePlatform.ExistsByPlatformCode(ctx, req.PlatformCode, req.Id)
		if err != nil {
			return err
		}
		if exists {
			return errors.New("平台编码已存在")
		}
	}

	// 验证认证类型相关的必填字段
	if req.AuthType != "" {
		authReq := &dto.CreateDatasourcePlatformReq{
			AuthType:     req.AuthType,
			Token:        req.Token,
			ApiKey:       req.ApiKey,
			ClientId:     req.ClientId,
			ClientSecret: req.ClientSecret,
		}
		if err = s.validateAuthFields(authReq); err != nil {
			return err
		}
	}

	// 设置更新时间
	req.UpdatedAt = strconv.FormatInt(time.Now().Unix(), 10)
	_, err = dao.DatasourcePlatform.Update(ctx, req)
	return err
}

// UpdateStatus 更新数据源平台状态
func (s *datasourcePlatformService) UpdateStatus(ctx context.Context, req *dto.UpdateDatasourcePlatformStatusReq) (err error) {
	// 检查平台是否存在
	exist, err := dao.DatasourcePlatform.GetOne(ctx, &dto.GetDatasourcePlatformReq{Id: req.Id})
	if err != nil {
		return err
	}
	if exist == nil {
		return errors.New("数据源平台不存在")
	}

	// 如果状态没有变化，直接返回
	if string(exist.Status) == req.Status.String() {
		return nil
	}

	_, err = dao.DatasourcePlatform.UpdateStatus(ctx, req.Id, req.Status.String(), req.UpdatedBy)
	return err
}

// Delete 删除数据源平台
func (s *datasourcePlatformService) Delete(ctx context.Context, req *dto.DeleteDatasourcePlatformReq) (err error) {
	// 检查平台是否存在
	exist, err := dao.DatasourcePlatform.GetOne(ctx, &dto.GetDatasourcePlatformReq{Id: req.Id})
	if err != nil {
		return err
	}
	if exist == nil {
		return errors.New("数据源平台不存在")
	}

	// TODO: 检查是否存在关联的数据，防止误删
	// 例如：检查该平台是否有关联的接口配置等

	_, err = dao.DatasourcePlatform.Delete(ctx, req)
	return err
}

// GetStatistics 获取平台统计信息
func (s *datasourcePlatformService) GetStatistics(ctx context.Context) (res *dto.GetPlatformStatisticsRes, err error) {
	stats, err := dao.DatasourcePlatform.GetPlatformStatistics(ctx)
	if err != nil {
		return nil, err
	}

	res = &dto.GetPlatformStatisticsRes{
		TotalPlatforms:      int(stats["totalPlatforms"]),
		ActivePlatforms:     int(stats["activePlatforms"]),
		InactivePlatforms:   int(stats["inactivePlatforms"]),
		TokenAuthPlatforms:  int(stats["TOKENAuthPlatforms"]),
		ApiKeyAuthPlatforms: int(stats["API_KEYAuthPlatforms"]),
		OAuth2AuthPlatforms: int(stats["OAUTH2AuthPlatforms"]),
		BasicAuthPlatforms:  int(stats["BASICAuthPlatforms"]),
	}
	return res, nil
}

// ListActivePlatforms 获取所有启用的平台
func (s *datasourcePlatformService) ListActivePlatforms(ctx context.Context) (platforms []entity.DatasourcePlatform, err error) {
	return dao.DatasourcePlatform.ListActivePlatforms(ctx)
}

// validateAuthFields 验证认证类型相关的必填字段
func (s *datasourcePlatformService) validateAuthFields(req *dto.CreateDatasourcePlatformReq) error {
	switch req.AuthType {
	case "TOKEN":
		if req.Token == "" {
			return errors.New("TOKEN认证类型必须填写token字段")
		}
	case "API_KEY":
		if req.ApiKey == "" {
			return errors.New("API_KEY认证类型必须填写apiKey字段")
		}
	case "OAUTH2":
		if req.ClientId == "" || req.ClientSecret == "" {
			return errors.New("OAUTH2认证类型必须填写clientId和clientSecret字段")
		}
	case "BASIC":
		// BASIC认证通常需要用户名和密码，这里可以添加相应验证
		if req.Token == "" && req.ApiKey == "" {
			return errors.New("BASIC认证类型需要填写认证信息")
		}
	default:
		return errors.New("不支持的认证类型")
	}
	return nil
}

// performConnectionTest 执行连接测试（示例实现）
func (s *datasourcePlatformService) performConnectionTest(platform *entity.DatasourcePlatform) (success bool, message string) {
	// 这里应该实现实际的连接测试逻辑
	// 例如：发送HTTP请求到api_base_url，验证响应

	// 暂时返回模拟结果
	return true, "连接测试成功"
}

// getStatusName 获取状态名称
func (s *datasourcePlatformService) getStatusName(status api_feature.PlatformStatus) string {
	statusNames := map[api_feature.PlatformStatus]string{
		api_feature.PlatformStatusActive:   "启用",
		api_feature.PlatformStatusInactive: "停用",
	}
	if name, ok := statusNames[status]; ok {
		return name
	}
	return string(status)
}

// getAuthTypeName 获取认证类型名称
func (s *datasourcePlatformService) getAuthTypeName(authType string) string {
	authTypeNames := map[string]string{
		"TOKEN":   "Token认证",
		"API_KEY": "API Key认证",
		"OAUTH2":  "OAuth2认证",
		"BASIC":   "Basic认证",
	}
	if name, ok := authTypeNames[authType]; ok {
		return name
	}
	return authType
}

// BatchUpdateStatus 批量更新平台状态
func (s *datasourcePlatformService) BatchUpdateStatus(ctx context.Context, ids []int64, status string, updatedBy string) (err error) {
	if len(ids) == 0 {
		return errors.New("请选择要更新的平台")
	}

	_, err = dao.DatasourcePlatform.BatchUpdateStatus(ctx, ids, status, updatedBy)
	return err
}