// Package usecase provides application use cases that orchestrate domain services.
package usecase

import (
	"context"

	"github.com/router-for-me/CLIProxyAPI/v6/internal/application/dto"
	"github.com/router-for-me/CLIProxyAPI/v6/internal/application/mapper"
	"github.com/router-for-me/CLIProxyAPI/v6/internal/domain/errors"
	"github.com/router-for-me/CLIProxyAPI/v6/internal/domain/ports"
)

// Logger interface for logging
type Logger interface {
	Debug(ctx context.Context, message string)
	Info(ctx context.Context, message string)
	Warn(ctx context.Context, message string)
	Error(ctx context.Context, message string, err error)
	Debugf(ctx context.Context, format string, args ...interface{})
	Infof(ctx context.Context, format string, args ...interface{})
}

// ConfigUseCase orchestrates configuration-related operations
type ConfigUseCase struct {
	configService ports.ConfigService
	logger        Logger
}

// NewConfigUseCase creates a new ConfigUseCase
func NewConfigUseCase(configService ports.ConfigService, logger Logger) *ConfigUseCase {
	return &ConfigUseCase{
		configService: configService,
		logger:        logger,
	}
}

// GetConfig retrieves the current configuration
func (uc *ConfigUseCase) GetConfig(ctx context.Context) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: getting config")
	}

	cfg, err := uc.configService.GetConfig(ctx)
	if err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to get config", err)
		}
		return nil, err
	}

	return mapper.ToConfigResponse(cfg), nil
}

// GetConfigYAML retrieves the raw configuration as YAML bytes
func (uc *ConfigUseCase) GetConfigYAML(ctx context.Context) ([]byte, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: getting config YAML")
	}

	// This would need to be implemented in the repository
	// For now, return an error indicating not implemented
	return nil, errors.New(errors.InternalError, "GetConfigYAML not implemented in use case")
}

// UpdateConfig updates the entire configuration
func (uc *ConfigUseCase) UpdateConfig(ctx context.Context, req *dto.UpdateConfigRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating config")
	}

	if req == nil {
		return nil, errors.New(errors.InvalidInput, "request is nil")
	}

	cfg := mapper.ToConfig(req)
	if err := uc.configService.UpdateConfig(ctx, cfg); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update config", err)
		}
		return nil, err
	}

	return mapper.ToConfigResponse(cfg), nil
}

// UpdateField updates a single configuration field
func (uc *ConfigUseCase) UpdateField(ctx context.Context, field string, value interface{}) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating field %s", field)
	}

	if err := uc.configService.UpdateField(ctx, field, value); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update field", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateAPIKeys updates the API keys
func (uc *ConfigUseCase) UpdateAPIKeys(ctx context.Context, req *dto.UpdateAPIKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating API keys")
	}

	if err := uc.configService.UpdateAPIKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update API keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateGeminiKeys updates the Gemini keys
func (uc *ConfigUseCase) UpdateGeminiKeys(ctx context.Context, req *dto.UpdateGeminiKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Gemini keys")
	}

	if err := uc.configService.UpdateGeminiKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Gemini keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateClaudeKeys updates the Claude keys
func (uc *ConfigUseCase) UpdateClaudeKeys(ctx context.Context, req *dto.UpdateClaudeKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Claude keys")
	}

	if err := uc.configService.UpdateClaudeKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Claude keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateCodexKeys updates the Codex keys
func (uc *ConfigUseCase) UpdateCodexKeys(ctx context.Context, req *dto.UpdateCodexKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Codex keys")
	}

	if err := uc.configService.UpdateCodexKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Codex keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateOpenAICompatibility updates the OpenAI compatibility entries
func (uc *ConfigUseCase) UpdateOpenAICompatibility(ctx context.Context, req *dto.UpdateOpenAICompatRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating OpenAI compatibility")
	}

	if err := uc.configService.UpdateOpenAICompatibility(ctx, req.Entries); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update OpenAI compatibility", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateVertexCompatKeys updates the Vertex compatibility keys
func (uc *ConfigUseCase) UpdateVertexCompatKeys(ctx context.Context, req *dto.UpdateVertexCompatKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Vertex compatibility keys")
	}

	if err := uc.configService.UpdateVertexCompatKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Vertex compatibility keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateKiroKeys updates the Kiro keys
func (uc *ConfigUseCase) UpdateKiroKeys(ctx context.Context, req *dto.UpdateKiroKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Kiro keys")
	}

	if err := uc.configService.UpdateKiroKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Kiro keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateOAuthExcludedModels updates OAuth excluded models
func (uc *ConfigUseCase) UpdateOAuthExcludedModels(ctx context.Context, req *dto.UpdateOAuthExcludedModelsRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating OAuth excluded models")
	}

	if err := uc.configService.UpdateOAuthExcludedModels(ctx, req.Models); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update OAuth excluded models", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateOAuthModelAlias updates OAuth model aliases
func (uc *ConfigUseCase) UpdateOAuthModelAlias(ctx context.Context, req *dto.UpdateOAuthModelAliasRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating OAuth model aliases")
	}

	if err := uc.configService.UpdateOAuthModelAlias(ctx, req.Aliases); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update OAuth model aliases", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateAmpCode updates the AmpCode configuration
func (uc *ConfigUseCase) UpdateAmpCode(ctx context.Context, req *dto.UpdateAmpCodeRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating AmpCode")
	}

	if err := uc.configService.UpdateAmpCode(ctx, req.AmpCode); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update AmpCode", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateAmpUpstreamURL updates the Amp upstream URL
func (uc *ConfigUseCase) UpdateAmpUpstreamURL(ctx context.Context, url string) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Amp upstream URL")
	}

	if err := uc.configService.UpdateAmpUpstreamURL(ctx, url); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Amp upstream URL", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateAmpModelMappings updates Amp model mappings
func (uc *ConfigUseCase) UpdateAmpModelMappings(ctx context.Context, req *dto.UpdateAmpModelMappingsRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Amp model mappings")
	}

	if err := uc.configService.UpdateAmpModelMappings(ctx, req.Mappings); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Amp model mappings", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateAmpUpstreamAPIKeys updates Amp upstream API keys
func (uc *ConfigUseCase) UpdateAmpUpstreamAPIKeys(ctx context.Context, req *dto.UpdateAmpUpstreamAPIKeysRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating Amp upstream API keys")
	}

	if err := uc.configService.UpdateAmpUpstreamAPIKeys(ctx, req.Keys); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update Amp upstream API keys", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateDebug updates the debug setting
func (uc *ConfigUseCase) UpdateDebug(ctx context.Context, enabled bool) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating debug to %v", enabled)
	}

	if err := uc.configService.UpdateDebug(ctx, enabled); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update debug", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateUsageStatisticsEnabled updates the usage statistics enabled setting
func (uc *ConfigUseCase) UpdateUsageStatisticsEnabled(ctx context.Context, enabled bool) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating usage statistics enabled to %v", enabled)
	}

	if err := uc.configService.UpdateUsageStatisticsEnabled(ctx, enabled); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update usage statistics enabled", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateLoggingToFile updates the logging to file setting
func (uc *ConfigUseCase) UpdateLoggingToFile(ctx context.Context, enabled bool) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating logging to file to %v", enabled)
	}

	if err := uc.configService.UpdateLoggingToFile(ctx, enabled); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update logging to file", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateLogsMaxTotalSizeMB updates the max log size
func (uc *ConfigUseCase) UpdateLogsMaxTotalSizeMB(ctx context.Context, sizeMB int) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating logs max total size to %d MB", sizeMB)
	}

	if err := uc.configService.UpdateLogsMaxTotalSizeMB(ctx, sizeMB); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update logs max total size", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateRequestLog updates the request log setting
func (uc *ConfigUseCase) UpdateRequestLog(ctx context.Context, enabled bool) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating request log to %v", enabled)
	}

	if err := uc.configService.UpdateRequestLog(ctx, enabled); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update request log", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateWebsocketAuth updates the websocket auth setting
func (uc *ConfigUseCase) UpdateWebsocketAuth(ctx context.Context, enabled bool) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating websocket auth to %v", enabled)
	}

	if err := uc.configService.UpdateWebsocketAuth(ctx, enabled); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update websocket auth", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateRequestRetry updates the request retry count
func (uc *ConfigUseCase) UpdateRequestRetry(ctx context.Context, retry int) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating request retry to %d", retry)
	}

	if err := uc.configService.UpdateRequestRetry(ctx, retry); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update request retry", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateMaxRetryInterval updates the max retry interval
func (uc *ConfigUseCase) UpdateMaxRetryInterval(ctx context.Context, interval int) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating max retry interval to %d", interval)
	}

	if err := uc.configService.UpdateMaxRetryInterval(ctx, interval); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update max retry interval", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateForceModelPrefix updates the force model prefix setting
func (uc *ConfigUseCase) UpdateForceModelPrefix(ctx context.Context, enabled bool) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating force model prefix to %v", enabled)
	}

	if err := uc.configService.UpdateForceModelPrefix(ctx, enabled); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update force model prefix", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateRoutingStrategy updates the routing strategy
func (uc *ConfigUseCase) UpdateRoutingStrategy(ctx context.Context, strategy string) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating routing strategy to %s", strategy)
	}

	if err := uc.configService.UpdateRoutingStrategy(ctx, strategy); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update routing strategy", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateProxyURL updates the proxy URL
func (uc *ConfigUseCase) UpdateProxyURL(ctx context.Context, url string) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debugf(ctx, "usecase: updating proxy URL to %s", url)
	}

	if err := uc.configService.UpdateProxyURL(ctx, url); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update proxy URL", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// DeleteProxyURL clears the proxy URL
func (uc *ConfigUseCase) DeleteProxyURL(ctx context.Context) (*dto.ConfigResponse, error) {
	return uc.UpdateProxyURL(ctx, "")
}

// UpdateRemoteManagement updates the remote management settings
func (uc *ConfigUseCase) UpdateRemoteManagement(ctx context.Context, req *dto.UpdateRemoteManagementRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating remote management settings")
	}

	if err := uc.configService.UpdateRemoteManagement(ctx, req.AllowRemote, req.SecretHash); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update remote management settings", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// UpdateQuotaExceeded updates the quota exceeded settings
func (uc *ConfigUseCase) UpdateQuotaExceeded(ctx context.Context, req *dto.UpdateQuotaExceededRequest) (*dto.ConfigResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: updating quota exceeded settings")
	}

	if err := uc.configService.UpdateQuotaExceeded(ctx, req.SwitchProject, req.SwitchPreviewModel); err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to update quota exceeded settings", err)
		}
		return nil, err
	}

	return uc.GetConfig(ctx)
}

// GetLatestVersion retrieves the latest version from GitHub
func (uc *ConfigUseCase) GetLatestVersion(ctx context.Context) (*dto.VersionResponse, error) {
	if uc.logger != nil {
		uc.logger.Debug(ctx, "usecase: getting latest version")
	}

	version, err := uc.configService.GetLatestVersion(ctx)
	if err != nil {
		if uc.logger != nil {
			uc.logger.Error(ctx, "usecase: failed to get latest version", err)
		}
		return nil, err
	}

	return &dto.VersionResponse{
		LatestVersion: version,
	}, nil
}