package file

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"

	"github.com/alecthomas/kong"
	"github.com/charmbracelet/bubbles/filepicker"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/gum/internal/exit"
	"github.com/charmbracelet/gum/style"
)

// Run is the interface to picking a file.
func (o Options) Run() error {
	if !o.File && !o.Directory {
		return errors.New("at least one between --file and --directory must be set")
	}

	if o.Path == "" {
		o.Path = "."
	}

	path, err := filepath.Abs(o.Path)
	if err != nil {
		return fmt.Errorf("file not found: %w", err)
	}

	fp := filepicker.New()
	fp.Path = path
	fp.Height = o.Height
	fp.AutoHeight = o.Height == 0
	fp.Cursor = o.Cursor
	fp.DirAllowed = o.Directory
	fp.FileAllowed = o.File
	fp.ShowHidden = o.All
	fp.Styles = filepicker.Styles{
		Cursor:     o.CursorStyle.ToLipgloss(),
		Symlink:    o.SymlinkStyle.ToLipgloss(),
		Directory:  o.DirectoryStyle.ToLipgloss(),
		File:       o.FileStyle.ToLipgloss(),
		Permission: o.PermissionsStyle.ToLipgloss(),
		Selected:   o.SelectedStyle.ToLipgloss(),
		FileSize:   o.FileSizeStyle.ToLipgloss(),
	}

	m := model{filepicker: fp}

	tm, err := tea.NewProgram(&m, tea.WithOutput(os.Stderr)).Run()
	if err != nil {
		return fmt.Errorf("unable to pick selection: %w", err)
	}

	m = tm.(model)
	if m.aborted {
		return exit.ErrAborted
	}

	if m.selectedPath == "" {
		os.Exit(1)
	}

	fmt.Println(m.selectedPath)

	return nil
}

// BeforeReset hook. Used to unclutter style flags.
func (o Options) BeforeReset(ctx *kong.Context) error {
	style.HideFlags(ctx)
	return nil
}