package root

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

	"github.com/spf13/cobra"
)

var initCmd = &cobra.Command{
	Use:   "init [bash|zsh|fish]",
	Short: "Generate the autostart script for your shell",
	Long: `Add the output of this command to your shell's configuration file to start Iris automatically.
For example, add this to your ~/.zshrc:
  eval "$(iris init zsh)"`,
	ValidArgs: []string{"bash", "zsh", "fish"},
	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
	Run: func(cmd *cobra.Command, args []string) {
		shell := args[0]
		switch shell {
		case "bash", "zsh":
			fmt.Printf(`
# Iris Autostart Hook
if [ -z "$IRIS_PID" ]; then
    export IRIS_ACTIVE_SHELL="%s"
    exec iris
fi
`, shell)
		case "fish":
			fmt.Printf(`
# Iris Autostart Hook
if not set -q IRIS_PID
    set -gx IRIS_ACTIVE_SHELL "fish"
    exec iris
end
`)
		}
	},
}

func init() {
	rootCmd.AddCommand(initCmd)
	rootCmd.AddCommand(setupCmd)
}

var setupCmd = &cobra.Command{
	Use:   "setup",
	Short: "Automatically setup iris shell integration and install binary",
	Run: func(cmd *cobra.Command, args []string) {
		home, _ := os.UserHomeDir()

		localBin := filepath.Join(home, ".local", "bin")
		_ = os.MkdirAll(localBin, 0755)

		exe, _ := os.Executable()
		targetExe := filepath.Join(localBin, "iris")

		fmt.Printf("Installing iris to %s...\n", targetExe)
		input, err := os.ReadFile(exe)
		if err != nil {
			fmt.Printf("Failed to read current executable: %v\n", err)
			return
		}

		_ = os.Remove(targetExe)
		err = os.WriteFile(targetExe, input, 0755)
		if err != nil {
			fmt.Printf("Failed to write to %s: %v\n", targetExe, err)
			return
		}

		shellPath := os.Getenv("SHELL")
		shellName := filepath.Base(shellPath)
		var configFile string
		var evalCmd string

		switch shellName {
		case "zsh":
			configFile = filepath.Join(home, ".zshrc")
			evalCmd = `eval "$(iris init zsh)"`
		case "bash":
			configFile = filepath.Join(home, ".bashrc")
			evalCmd = `eval "$(iris init bash)"`
		case "fish":
			configFile = filepath.Join(home, ".config", "fish", "config.fish")
			evalCmd = `iris init fish | source`
		default:
			fmt.Printf("Unsupported shell: %s. Please add iris init manually.\n", shellName)
			return
		}

		content, _ := os.ReadFile(configFile)
		if strings.Contains(string(content), "iris init") {
			fmt.Printf("Iris is already configured in %s\n", configFile)
		} else {
			f, err := os.OpenFile(configFile, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0644)
			if err != nil {
				fmt.Printf("Failed to update %s: %v\n", configFile, err)
				return
			}
			defer func() { _ = f.Close() }()

			_, _ = f.WriteString("\n# Iris Autocomplete\n" + evalCmd + "\n")
			fmt.Printf("✓ Added iris integration to %s\n", configFile)
		}

		fmt.Println("\nSetup complete! Please restart your terminal or run:")
		fmt.Printf("  source %s\n", configFile)
	},
}