package app

import (
	"fmt"

	"github.com/go-playground/validator/v10"
)

type Config struct {
	ServerPort uint16 `envconfig:"SERVER_PORT" validate:"required"`
	ServerKey  string `envconfig:"SERVER_KEY" validate:"required"`

	PluginServerApiKey string `envconfig:"PLUGIN_SERVER_API_KEY" validate:"required"`

	DifyInnerApiURL string `envconfig:"DIFY_INNER_API_URL" validate:"required"`
	DifyInnerApiKey string `envconfig:"DIFY_INNER_API_KEY" validate:"required"`

	PluginRemoteInstallingHost             string `envconfig:"PLUGIN_REMOTE_INSTALLING_HOST"`
	PluginRemoteInstallingPort             uint16 `envconfig:"PLUGIN_REMOTE_INSTALLING_PORT"`
	PluginRemoteInstallingEnabled          bool   `envconfig:"PLUGIN_REMOTE_INSTALLING_ENABLED"`
	PluginRemoteInstallingMaxConn          int    `envconfig:"PLUGIN_REMOTE_INSTALLING_MAX_CONN"`
	PluginRemoteInstallServerEventLoopNums int    `envconfig:"PLUGIN_REMOTE_INSTALL_SERVER_EVENT_LOOP_NUMS"`

	PluginEndpointEnabled bool `envconfig:"PLUGIN_ENDPOINT_ENABLED"`

	PluginStoragePath    string `envconfig:"STORAGE_PLUGIN_PATH" validate:"required"`
	PluginWorkingPath    string `envconfig:"PLUGIN_WORKING_PATH"`
	PluginMediaCacheSize uint16 `envconfig:"PLUGIN_MEDIA_CACHE_SIZE"`
	PluginMediaCachePath string `envconfig:"PLUGIN_MEDIA_CACHE_PATH"`
	ProcessCachingPath   string `envconfig:"PROCESS_CACHING_PATH"`

	PluginMaxExecutionTimeout int `envconfig:"PLUGIN_MAX_EXECUTION_TIMEOUT" validate:"required"`

	Platform PlatformType `envconfig:"PLATFORM" validate:"required"`

	RoutinePoolSize int `envconfig:"ROUTINE_POOL_SIZE" validate:"required"`

	RedisHost string `envconfig:"REDIS_HOST" validate:"required"`
	RedisPort uint16 `envconfig:"REDIS_PORT" validate:"required"`
	RedisPass string `envconfig:"REDIS_PASS" validate:"required"`

	DBUsername string `envconfig:"DB_USERNAME" validate:"required"`
	DBPassword string `envconfig:"DB_PASSWORD" validate:"required"`
	DBHost     string `envconfig:"DB_HOST" validate:"required"`
	DBPort     uint16 `envconfig:"DB_PORT" validate:"required"`
	DBDatabase string `envconfig:"DB_DATABASE" validate:"required"`
	DBSslMode  string `envconfig:"DB_SSL_MODE" validate:"required,oneof=disable require"`

	PersistenceStorageType        string `envconfig:"PERSISTENCE_STORAGE_TYPE" validate:"required,oneof=local s3"`
	PersistenceStorageLocalPath   string `envconfig:"PERSISTENCE_STORAGE_LOCAL_PATH"`
	PersistenceStorageS3Region    string `envconfig:"PERSISTENCE_STORAGE_S3_REGION"`
	PersistenceStorageS3AccessKey string `envconfig:"PERSISTENCE_STORAGE_S3_ACCESS_KEY"`
	PersistenceStorageS3SecretKey string `envconfig:"PERSISTENCE_STORAGE_S3_SECRET_KEY"`
	PersistenceStorageS3Bucket    string `envconfig:"PERSISTENCE_STORAGE_S3_BUCKET"`

	LifetimeCollectionHeartbeatInterval int `envconfig:"LIFETIME_COLLECTION_HEARTBEAT_INTERVAL"  validate:"required"`
	LifetimeCollectionGCInterval        int `envconfig:"LIFETIME_COLLECTION_GC_INTERVAL" validate:"required"`
	LifetimeStateGCInterval             int `envconfig:"LIFETIME_STATE_GC_INTERVAL" validate:"required"`

	DifyInvocationConnectionIdleTimeout int `envconfig:"DIFY_INVOCATION_CONNECTION_IDLE_TIMEOUT" validate:"required"`

	DifyPluginServerlessConnectorURL    *string `envconfig:"DIFY_PLUGIN_SERVERLESS_CONNECTOR_URL"`
	DifyPluginServerlessConnectorAPIKey *string `envconfig:"DIFY_PLUGIN_SERVERLESS_CONNECTOR_API_KEY"`

	MaxPluginPackageSize int64 `envconfig:"MAX_PLUGIN_PACKAGE_SIZE" validate:"required"`

	MaxAWSLambdaTransactionTimeout int `envconfig:"MAX_AWS_LAMBDA_TRANSACTION_TIMEOUT"`
}

func (c *Config) Validate() error {
	validator := validator.New()
	err := validator.Struct(c)
	if err != nil {
		return err
	}

	if c.PluginRemoteInstallingEnabled {
		if c.PluginRemoteInstallingHost == "" {
			return fmt.Errorf("plugin remote installing host is empty")
		}
		if c.PluginRemoteInstallingPort == 0 {
			return fmt.Errorf("plugin remote installing port is empty")
		}
		if c.PluginRemoteInstallingMaxConn == 0 {
			return fmt.Errorf("plugin remote installing max connection is empty")
		}
		if c.PluginRemoteInstallServerEventLoopNums == 0 {
			return fmt.Errorf("plugin remote install server event loop nums is empty")
		}
	}

	if c.Platform == PLATFORM_AWS_LAMBDA {
		if c.DifyPluginServerlessConnectorURL == nil {
			return fmt.Errorf("dify plugin serverless connector url is empty")
		}

		if c.DifyPluginServerlessConnectorAPIKey == nil {
			return fmt.Errorf("dify plugin serverless connector api key is empty")
		}

		if c.MaxAWSLambdaTransactionTimeout == 0 {
			return fmt.Errorf("max aws lambda transaction timeout is empty")
		}
	} else if c.Platform == PLATFORM_LOCAL {
		if c.PluginWorkingPath == "" {
			return fmt.Errorf("plugin working path is empty")
		}

		if c.ProcessCachingPath == "" {
			return fmt.Errorf("process caching path is empty")
		}
	} else {
		return fmt.Errorf("invalid platform")
	}

	if c.PersistenceStorageType == "s3" {
		if c.PersistenceStorageS3Region == "" ||
			c.PersistenceStorageS3AccessKey == "" ||
			c.PersistenceStorageS3SecretKey == "" ||
			c.PersistenceStorageS3Bucket == "" {
			return fmt.Errorf("s3 region, access key, secret key, bucket is empty")
		}
	}

	return nil
}

type PlatformType string

const (
	PLATFORM_LOCAL      PlatformType = "local"
	PLATFORM_AWS_LAMBDA PlatformType = "aws_lambda"
)