package cmd

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"text/tabwriter"

	"code.gitea.io/sdk/gitea"
	"github.com/spf13/cobra"
	"codeberg.org/romaintb/fgj/internal/api"
	"codeberg.org/romaintb/fgj/internal/config"
)

var repoCmd = &cobra.Command{
	Use:   "repo",
	Short: "Manage repositories",
	Long:  "View and manage repositories.",
}

var repoViewCmd = &cobra.Command{
	Use:   "view [owner/name]",
	Short: "View repository details",
	Long:  "Display detailed information about a repository.",
	Args:  cobra.MaximumNArgs(1),
	RunE:  runRepoView,
}

var repoListCmd = &cobra.Command{
	Use:   "list",
	Short: "List your repositories",
	Long:  "List repositories owned by the authenticated user.",
	RunE:  runRepoList,
}

var repoCloneCmd = &cobra.Command{
	Use:   "clone <owner/name> [destination]",
	Short: "Clone a repository",
	Long:  "Clone a repository locally. If destination is not specified, the repository name is used.",
	Args:  cobra.RangeArgs(1, 2),
	RunE:  runRepoClone,
}

var repoForkCmd = &cobra.Command{
	Use:   "fork <owner/name>",
	Short: "Fork a repository",
	Long:  "Create a fork of a repository.",
	Args:  cobra.ExactArgs(1),
	RunE:  runRepoFork,
}

func init() {
	rootCmd.AddCommand(repoCmd)
	repoCmd.AddCommand(repoViewCmd)
	repoCmd.AddCommand(repoListCmd)
	repoCmd.AddCommand(repoCloneCmd)
	repoCmd.AddCommand(repoForkCmd)

	repoCloneCmd.Flags().StringP("protocol", "p", "https", "Clone protocol: https or ssh")
}

func runRepoView(cmd *cobra.Command, args []string) error {
	var repo string
	if len(args) > 0 {
		repo = args[0]
	}

	owner, name, err := parseRepo(repo)
	if err != nil {
		return err
	}

	cfg, err := config.Load()
	if err != nil {
		return err
	}

	client, err := api.NewClientFromConfig(cfg, "")
	if err != nil {
		return err
	}

	repository, _, err := client.GetRepo(owner, name)
	if err != nil {
		return fmt.Errorf("failed to get repository: %w", err)
	}

	fmt.Printf("Repository: %s/%s\n", repository.Owner.UserName, repository.Name)
	fmt.Printf("Description: %s\n", repository.Description)
	fmt.Printf("URL: %s\n", repository.HTMLURL)
	fmt.Printf("Clone URL (HTTPS): %s\n", repository.CloneURL)
	fmt.Printf("Clone URL (SSH): %s\n", repository.SSHURL)
	fmt.Printf("Default Branch: %s\n", repository.DefaultBranch)
	fmt.Printf("Stars: %d\n", repository.Stars)
	fmt.Printf("Forks: %d\n", repository.Forks)
	fmt.Printf("Open Issues: %d\n", repository.OpenIssues)
	fmt.Printf("Private: %v\n", repository.Private)
	fmt.Printf("Created: %s\n", repository.Created.Format("2006-01-02 15:04:05"))
	fmt.Printf("Updated: %s\n", repository.Updated.Format("2006-01-02 15:04:05"))

	return nil
}

func runRepoList(cmd *cobra.Command, args []string) error {
	cfg, err := config.Load()
	if err != nil {
		return err
	}

	client, err := api.NewClientFromConfig(cfg, "")
	if err != nil {
		return err
	}

	user, _, err := client.GetMyUserInfo()
	if err != nil {
		return fmt.Errorf("failed to get user info: %w", err)
	}

	repos, _, err := client.ListUserRepos(user.UserName, gitea.ListReposOptions{})
	if err != nil {
		return fmt.Errorf("failed to list repositories: %w", err)
	}

	if len(repos) == 0 {
		fmt.Println("No repositories found")
		return nil
	}

	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
	_, _ = fmt.Fprintf(w, "NAME\tVISIBILITY\tDESCRIPTION\n")
	for _, repo := range repos {
		visibility := "public"
		if repo.Private {
			visibility = "private"
		}
		desc := repo.Description
		if len(desc) > 50 {
			desc = desc[:47] + "..."
		}
		_, _ = fmt.Fprintf(w, "%s/%s\t%s\t%s\n", repo.Owner.UserName, repo.Name, visibility, desc)
	}
	_ = w.Flush()

	return nil
}

func runRepoClone(cmd *cobra.Command, args []string) error {
	repo := args[0]
	protocol, _ := cmd.Flags().GetString("protocol")

	owner, name, err := parseRepo(repo)
	if err != nil {
		return err
	}

	cfg, err := config.Load()
	if err != nil {
		return err
	}

	client, err := api.NewClientFromConfig(cfg, "")
	if err != nil {
		return err
	}

	repository, _, err := client.GetRepo(owner, name)
	if err != nil {
		return fmt.Errorf("failed to get repository: %w", err)
	}

	var cloneURL string
	if protocol == "ssh" {
		cloneURL = repository.SSHURL
	} else {
		cloneURL = repository.CloneURL
	}

	// Determine destination path
	var destination string
	if len(args) > 1 {
		destination = args[1]
	} else {
		destination = name
	}

	fmt.Printf("Cloning %s/%s to %s...\n", owner, name, destination)

	// Create parent directory if it doesn't exist
	if dir := filepath.Dir(destination); dir != "." {
		if err := os.MkdirAll(dir, 0755); err != nil {
			return fmt.Errorf("failed to create destination directory: %w", err)
		}
	}

	// Execute git clone
	gitCmd := exec.Command("git", "clone", cloneURL, destination)
	gitCmd.Stdout = os.Stdout
	gitCmd.Stderr = os.Stderr
	gitCmd.Stdin = os.Stdin

	if err := gitCmd.Run(); err != nil {
		return fmt.Errorf("failed to clone repository: %w", err)
	}

	fmt.Printf("Repository cloned successfully to %s\n", destination)
	return nil
}

func runRepoFork(cmd *cobra.Command, args []string) error {
	repo := args[0]

	owner, name, err := parseRepo(repo)
	if err != nil {
		return err
	}

	cfg, err := config.Load()
	if err != nil {
		return err
	}

	client, err := api.NewClientFromConfig(cfg, "")
	if err != nil {
		return err
	}

	fork, _, err := client.CreateFork(owner, name, gitea.CreateForkOption{})
	if err != nil {
		return fmt.Errorf("failed to fork repository: %w", err)
	}

	fmt.Printf("Repository forked successfully\n")
	fmt.Printf("View at: %s\n", fork.HTMLURL)
	fmt.Printf("Clone URL: %s\n", fork.CloneURL)

	return nil
}