package config

import (
    "fmt"
    "os"
    "time"
)

// SetDefaultConfig sets the default configuration by writing to environment variables
// and create a default configuration file.
func SetDefaultConfig() error {
    // Define default values with explanations
    defaults := map[string]string{
        // Logging level: DEBUG, INFO, WARNING, ERROR
        "LOG_LEVEL":                      "INFO",

        // API server configuration
        "API_SERVER_BIND_ADDRESS":        "0.0.0.0", // IP address to bind the API server
        "API_SERVER_PORT":                "6678",    // Port for the API server

        // Transport server configuration for internal communication
        "TRANSPORT_SERVER_BIND_ADDRESS":  "0.0.0.0", // IP address for the transport server
        "TRANSPORT_SERVER_PORT":          "6679",    // Port for the transport server

        // S3 storage configuration
        "S3_ENABLED":                     "false",   // Enable S3 storage (true/false)
        "S3_CONNECTION_ADDRESS":          "",        // S3 connection address in the format {IP}:{PORT}
        "S3_AUTHORIZATION_INFO":          "",        // S3 authorization information (e.g., access key and secret key)
        "S3_REGION":                      "us-east-1", // AWS region for S3
        "S3_BUCKET_INFO":                 "",        // S3 bucket name

        // SMB storage configuration
        "SMB_ENABLED":                    "false",   // Enable SMB storage (true/false)
        "SMB_CONNECTION_ADDRESS":         "",        // SMB connection address in the format {IP}:{PORT}
        "SMB_AUTHORIZATION_INFO":         "",        // SMB authorization information (e.g., username and password)

        // BackBlaze B2 storage configuration
        "B2_ENABLED":           "false",   // Enable BackBlaze B2 storage (true/false)
        "B2_CONNECTION_ADDRESS":"",        // BackBlaze B2 connection address in the format {IP}:{PORT}
        "B2_AUTHORIZATION_INFO":"",        // BackBlaze B2 authorization information
        "B2_BUCKET_INFO":       "",        // BackBlaze B2 bucket name

        // Local storage configuration
        "LOCAL_STORAGE_ENABLED":          "true",    // Enable local storage (true/false)
        "LOCAL_STORAGE_DIRECTORY":        fmt.Sprintf("/etc/PixelRidge/BackGo/local-data-storage/%s-%d", os.Getenv("HOSTNAME"), time.Now().Unix()), // Path for local storage directory

        // Nodes configuration for cluster setup
        "NODES":                          "",        // Comma-separated list of node addresses in the cluster
    }

    // Write defaults to environment variables
    for key, value := range defaults {
        if err := os.Setenv(key, value); err != nil {
            return fmt.Errorf("failed to set default config for %s: %v", key, err)
        }
    }

    // write these defaults to a file for persistence
    // write to a JSON or YAML file

    return nil
}

// include a function here to write the configuration to a file