package cli

import (
	"fmt"

	"github.com/spf13/cobra"

	"larc.wejust.rest/larc/internal/convert"
)

/* CLI commands for larc <-> git conversion.
 * - larc2git: export larc repository to git format
 * - git2larc: import git repository to larc format */

// Larc2GitCmd creates the larc2git command
func Larc2GitCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "larc2git <larc-repo> <git-dest>",
		Short: "Export larc repository to git format",
		Long: `Export a larc repository to git format.

Converts larc revisions to git commits, preserving:
- Commit history and messages
- Branch structure (port -> main)
- File contents and permissions
- Author information and timestamps

The git repository will be created at the destination path.`,
		Args: cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			verbose, _ := cmd.Flags().GetBool("verbose")

			larcPath := args[0]
			gitPath := args[1]

			fmt.Printf("Exporting larc repository to git...\n")
			fmt.Printf("  Source: %s\n", larcPath)
			fmt.Printf("  Destination: %s\n", gitPath)

			if err := convert.ExportToGit(larcPath, gitPath, verbose); err != nil {
				return fmt.Errorf("export failed: %w", err)
			}

			return nil
		},
	}

	cmd.Flags().BoolP("verbose", "v", false, "verbose output")
	return cmd
}

// Git2LarcCmd creates the git2larc command
func Git2LarcCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "git2larc <git-repo> <larc-dest>",
		Short: "Import git repository to larc format",
		Long: `Import a git repository to larc format.

Converts git commits to larc revisions, with:
- Sequential revision numbering (r1, r2, ...)
- Flat tree structure
- Branch conversion (main/master -> port)
- xxhash64 blob hashing with zstd compression

The larc repository will be created at the destination path.`,
		Args: cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			verbose, _ := cmd.Flags().GetBool("verbose")

			gitPath := args[0]
			larcPath := args[1]

			fmt.Printf("Importing git repository to larc...\n")
			fmt.Printf("  Source: %s\n", gitPath)
			fmt.Printf("  Destination: %s\n", larcPath)

			if err := convert.ImportFromGit(gitPath, larcPath, verbose); err != nil {
				return fmt.Errorf("import failed: %w", err)
			}

			return nil
		},
	}

	cmd.Flags().BoolP("verbose", "v", false, "verbose output")
	return cmd
}

// ConvertCmd creates a parent command for conversion utilities
func ConvertCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "convert",
		Short: "Convert between larc and git repositories",
		Long: `Convert between larc and git repository formats.

Subcommands:
  larc2git  Export larc repository to git
  git2larc  Import git repository to larc

Example usage:
  larc convert larc2git ./my-larc-repo ./my-git-repo
  larc convert git2larc ./my-git-repo ./my-larc-repo`,
	}

	cmd.AddCommand(Larc2GitCmd())
	cmd.AddCommand(Git2LarcCmd())

	return cmd
}