package cli

import (
	"encoding/json"
	"fmt"
	"io"
	"os"
	"strings"

	"git.eeqj.de/sneak/secret/internal/secret"
	"git.eeqj.de/sneak/secret/internal/vault"
	"github.com/spf13/afero"
	"github.com/spf13/cobra"
)

func newAddCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "add <secret-name>",
		Short: "Add a secret to the vault",
		Long:  `Add a secret to the current vault. The secret value is read from stdin.`,
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			secret.Debug("Add command RunE starting", "secret_name", args[0])
			force, _ := cmd.Flags().GetBool("force")
			secret.Debug("Got force flag", "force", force)

			cli := NewCLIInstance()
			secret.Debug("Created CLI instance, calling AddSecret")
			return cli.AddSecret(args[0], force)
		},
	}

	cmd.Flags().BoolP("force", "f", false, "Overwrite existing secret")
	return cmd
}

func newGetCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "get <secret-name>",
		Short: "Retrieve a secret from the vault",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			version, _ := cmd.Flags().GetString("version")
			cli := NewCLIInstance()
			return cli.GetSecretWithVersion(args[0], version)
		},
	}

	cmd.Flags().StringP("version", "v", "", "Get a specific version (default: current)")
	return cmd
}

func newListCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:     "list [filter]",
		Aliases: []string{"ls"},
		Short:   "List all secrets in the current vault",
		Long:    `List all secrets in the current vault. Optionally filter by substring match in secret name.`,
		Args:    cobra.MaximumNArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			jsonOutput, _ := cmd.Flags().GetBool("json")

			var filter string
			if len(args) > 0 {
				filter = args[0]
			}

			cli := NewCLIInstance()
			return cli.ListSecrets(jsonOutput, filter)
		},
	}

	cmd.Flags().Bool("json", false, "Output in JSON format")
	return cmd
}

func newImportCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "import <secret-name>",
		Short: "Import a secret from a file",
		Long:  `Import a secret from a file and store it in the current vault under the given name.`,
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			sourceFile, _ := cmd.Flags().GetString("source")
			force, _ := cmd.Flags().GetBool("force")

			cli := NewCLIInstance()
			return cli.ImportSecret(args[0], sourceFile, force)
		},
	}

	cmd.Flags().StringP("source", "s", "", "Source file to import from (required)")
	cmd.Flags().BoolP("force", "f", false, "Overwrite existing secret")
	_ = cmd.MarkFlagRequired("source")
	return cmd
}

// AddSecret adds a secret to the current vault
func (cli *CLIInstance) AddSecret(secretName string, force bool) error {
	secret.Debug("CLI AddSecret starting", "secret_name", secretName, "force", force)

	// Get current vault
	secret.Debug("Getting current vault")
	vlt, err := vault.GetCurrentVault(cli.fs, cli.stateDir)
	if err != nil {
		return err
	}

	secret.Debug("Got current vault", "vault_name", vlt.GetName())

	// Read secret value from stdin
	secret.Debug("Reading secret value from stdin")
	value, err := io.ReadAll(os.Stdin)
	if err != nil {
		return fmt.Errorf("failed to read secret value: %w", err)
	}

	secret.Debug("Read secret value from stdin", "value_length", len(value))

	// Remove trailing newline if present
	if len(value) > 0 && value[len(value)-1] == '\n' {
		value = value[:len(value)-1]
		secret.Debug("Removed trailing newline", "new_length", len(value))
	}

	// Add the secret to the vault
	secret.Debug("Calling vault.AddSecret", "secret_name", secretName, "value_length", len(value), "force", force)
	if err := vlt.AddSecret(secretName, value, force); err != nil {
		secret.Debug("vault.AddSecret failed", "error", err)
		return err
	}

	secret.Debug("vault.AddSecret completed successfully")
	return nil
}

// GetSecret retrieves and prints a secret from the current vault
func (cli *CLIInstance) GetSecret(secretName string) error {
	return cli.GetSecretWithVersion(secretName, "")
}

// GetSecretWithVersion retrieves and prints a specific version of a secret
func (cli *CLIInstance) GetSecretWithVersion(secretName string, version string) error {
	// Get current vault
	vlt, err := vault.GetCurrentVault(cli.fs, cli.stateDir)
	if err != nil {
		return err
	}

	// Get the secret value
	var value []byte
	if version == "" {
		value, err = vlt.GetSecret(secretName)
	} else {
		value, err = vlt.GetSecretVersion(secretName, version)
	}
	if err != nil {
		return err
	}

	// Print the secret value to stdout
	fmt.Print(string(value))
	return nil
}

// ListSecrets lists all secrets in the current vault
func (cli *CLIInstance) ListSecrets(jsonOutput bool, filter string) error {
	// Get current vault
	vlt, err := vault.GetCurrentVault(cli.fs, cli.stateDir)
	if err != nil {
		return err
	}

	// Get list of secrets
	secrets, err := vlt.ListSecrets()
	if err != nil {
		return fmt.Errorf("failed to list secrets: %w", err)
	}

	// Filter secrets if filter is provided
	var filteredSecrets []string
	if filter != "" {
		for _, secretName := range secrets {
			if strings.Contains(secretName, filter) {
				filteredSecrets = append(filteredSecrets, secretName)
			}
		}
	} else {
		filteredSecrets = secrets
	}

	if jsonOutput {
		// For JSON output, get metadata for each secret
		secretsWithMetadata := make([]map[string]interface{}, 0, len(filteredSecrets))

		for _, secretName := range filteredSecrets {
			secretInfo := map[string]interface{}{
				"name": secretName,
			}

			// Try to get metadata using GetSecretObject
			if secretObj, err := vlt.GetSecretObject(secretName); err == nil {
				metadata := secretObj.GetMetadata()
				secretInfo["created_at"] = metadata.CreatedAt
				secretInfo["updated_at"] = metadata.UpdatedAt
			}

			secretsWithMetadata = append(secretsWithMetadata, secretInfo)
		}

		output := map[string]interface{}{
			"secrets": secretsWithMetadata,
		}
		if filter != "" {
			output["filter"] = filter
		}

		jsonBytes, err := json.MarshalIndent(output, "", "  ")
		if err != nil {
			return fmt.Errorf("failed to marshal JSON: %w", err)
		}

		fmt.Println(string(jsonBytes))
	} else {
		// Pretty table output
		if len(filteredSecrets) == 0 {
			if filter != "" {
				fmt.Printf("No secrets found in vault '%s' matching filter '%s'.\n", vlt.GetName(), filter)
			} else {
				fmt.Println("No secrets found in current vault.")
				fmt.Println("Run 'secret add <name>' to create one.")
			}
			return nil
		}

		// Get current vault name for display
		if filter != "" {
			fmt.Printf("Secrets in vault '%s' matching '%s':\n\n", vlt.GetName(), filter)
		} else {
			fmt.Printf("Secrets in vault '%s':\n\n", vlt.GetName())
		}
		fmt.Printf("%-40s %-20s\n", "NAME", "LAST UPDATED")
		fmt.Printf("%-40s %-20s\n", "----", "------------")

		for _, secretName := range filteredSecrets {
			lastUpdated := "unknown"
			if secretObj, err := vlt.GetSecretObject(secretName); err == nil {
				metadata := secretObj.GetMetadata()
				lastUpdated = metadata.UpdatedAt.Format("2006-01-02 15:04")
			}
			fmt.Printf("%-40s %-20s\n", secretName, lastUpdated)
		}

		fmt.Printf("\nTotal: %d secret(s)", len(filteredSecrets))
		if filter != "" {
			fmt.Printf(" (filtered from %d)", len(secrets))
		}
		fmt.Println()
	}

	return nil
}

// ImportSecret imports a secret from a file
func (cli *CLIInstance) ImportSecret(secretName, sourceFile string, force bool) error {
	// Get current vault
	vlt, err := vault.GetCurrentVault(cli.fs, cli.stateDir)
	if err != nil {
		return err
	}

	// Read secret value from the source file
	value, err := afero.ReadFile(cli.fs, sourceFile)
	if err != nil {
		return fmt.Errorf("failed to read secret from file %s: %w", sourceFile, err)
	}

	// Store the secret in the vault
	if err := vlt.AddSecret(secretName, value, force); err != nil {
		return err
	}

	fmt.Printf("Successfully imported secret '%s' from file '%s'\n", secretName, sourceFile)
	return nil
}