package main

import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"time"

	"git.wntrmute.dev/kyle/mcias/client"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var (
	dbUsername string
	dbToken    string
	useStored  bool
	databaseID string
	outputJSON bool
)

var databaseCmd = &cobra.Command{
	Use:   "database",
	Short: "Manage database credentials",
	Long:  `Commands for managing database credentials in the MCIAS system.`,
}

var getCredentialsCmd = &cobra.Command{
	Use:   "credentials",
	Short: "Get database credentials",
	Long: `Retrieve database credentials from the MCIAS system.
This command requires authentication with a username and token.
If database-id is provided, it returns credentials for that specific database.
If database-id is not provided, it returns the first database the user has access to.`,
	Run: func(_ *cobra.Command, args []string) {
		getCredentials()
	},
}

var listCredentialsCmd = &cobra.Command{
	Use:   "list",
	Short: "List all accessible database credentials",
	Long: `List all database credentials the user has access to.
This command requires authentication with a username and token.`,
	Run: func(_ *cobra.Command, args []string) {
		listCredentials()
	},
}

func init() {
	rootCmd.AddCommand(databaseCmd)
	databaseCmd.AddCommand(getCredentialsCmd)
	databaseCmd.AddCommand(listCredentialsCmd)

	// Flags for getCredentialsCmd
	getCredentialsCmd.Flags().StringVarP(&dbUsername, "username", "u", "", "Username for authentication")
	getCredentialsCmd.Flags().StringVarP(&dbToken, "token", "t", "", "Authentication token")
	getCredentialsCmd.Flags().BoolVarP(&useStored, "use-stored", "s", false, "Use stored token from previous login")
	getCredentialsCmd.Flags().StringVarP(&databaseID, "database-id", "d", "", "ID of the specific database to retrieve")
	getCredentialsCmd.Flags().BoolVarP(&outputJSON, "json", "j", false, "Output in JSON format")

	// Flags for listCredentialsCmd
	listCredentialsCmd.Flags().StringVarP(&dbUsername, "username", "u", "", "Username for authentication")
	listCredentialsCmd.Flags().StringVarP(&dbToken, "token", "t", "", "Authentication token")
	listCredentialsCmd.Flags().BoolVarP(&useStored, "use-stored", "s", false, "Use stored token from previous login")
	listCredentialsCmd.Flags().BoolVarP(&outputJSON, "json", "j", false, "Output in JSON format")

	// Make username required only if not using stored token
	getCredentialsCmd.MarkFlagsMutuallyExclusive("token", "use-stored")
	listCredentialsCmd.MarkFlagsMutuallyExclusive("token", "use-stored")
}

// createClient creates and configures a new MCIAS client
func createClient() *client.Client {
	// If using stored token, load it from the token file
	if useStored {
		tokenInfo, err := loadToken()
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error loading token: %v\n", err)
			os.Exit(1)
		}
		dbUsername = tokenInfo.Username
		dbToken = tokenInfo.Token
	}

	// Validate required parameters
	if dbUsername == "" {
		fmt.Fprintf(os.Stderr, "Error: username is required\n")
		os.Exit(1)
	}

	if dbToken == "" {
		fmt.Fprintf(os.Stderr, "Error: token is required (either provide --token or use --use-stored)\n")
		os.Exit(1)
	}

	serverAddr := viper.GetString("server")
	if serverAddr == "" {
		serverAddr = "http://localhost:8080"
	}

	// Create a new client with the appropriate options
	c := client.NewClient(
		client.WithBaseURL(serverAddr),
		client.WithUsername(dbUsername),
		client.WithToken(dbToken),
	)

	return c
}

func getCredentials() {
	// Create a new client
	c := createClient()

	// Create a context with timeout
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	// Get database credentials
	creds, err := c.GetDatabaseCredentials(ctx, databaseID)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Error retrieving database credentials: %v\n", err)
		os.Exit(1)
	}

	// Output in JSON format if requested
	if outputJSON {
		jsonData, err := json.MarshalIndent(creds, "", "  ")
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error formatting JSON: %v\n", err)
			os.Exit(1)
		}
		fmt.Println(string(jsonData))
		return
	}

	// Output in human-readable format
	fmt.Println("Database Credentials:")
	fmt.Printf("Host:     %s\n", creds.Host)
	fmt.Printf("Port:     %d\n", creds.Port)
	fmt.Printf("Name:     %s\n", creds.Name)
	fmt.Printf("User:     %s\n", creds.User)
	fmt.Printf("Password: %s\n", creds.Password)
}

func listCredentials() {
	// Create a new client
	c := createClient()

	// Create a context with timeout
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	// Get all database credentials
	credsList, err := c.GetDatabaseCredentialsList(ctx)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Error retrieving database credentials: %v\n", err)
		os.Exit(1)
	}

	// Output in JSON format if requested
	if outputJSON {
		jsonData, err := json.MarshalIndent(credsList, "", "  ")
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error formatting JSON: %v\n", err)
			os.Exit(1)
		}
		fmt.Println(string(jsonData))
		return
	}

	// Output in human-readable format
	fmt.Printf("Found %d database(s):\n\n", len(credsList))
	for i, creds := range credsList {
		fmt.Printf("Database #%d:\n", i+1)
		fmt.Printf("  Host:     %s\n", creds.Host)
		fmt.Printf("  Port:     %d\n", creds.Port)
		fmt.Printf("  Name:     %s\n", creds.Name)
		fmt.Printf("  User:     %s\n", creds.User)
		fmt.Printf("  Password: %s\n", creds.Password)
		fmt.Println()
	}
}