package platform

import (
	"context"
	"os"
	"os/exec"
)

// DarwinPlatform macOS 平台实现
type DarwinPlatform struct {
	homeDir string
}

// NewDarwinPlatform 创建 macOS 平台实例
func NewDarwinPlatform() *DarwinPlatform {
	home, _ := os.UserHomeDir()
	return &DarwinPlatform{homeDir: home}
}

func (p *DarwinPlatform) OS() string      { return "darwin" }
func (p *DarwinPlatform) Arch() string    { return "amd64" } // TODO: detect properly
func (p *DarwinPlatform) HomeDir() string { return p.homeDir }

func (p *DarwinPlatform) ConfigDir() string {
	return p.homeDir + "/Library/Application Support"
}

func (p *DarwinPlatform) DataDir() string {
	return p.homeDir + "/Library/Application Support"
}

func (p *DarwinPlatform) GetEnvVar(key string) string {
	return os.Getenv(key)
}

func (p *DarwinPlatform) SetEnvVar(ctx context.Context, key, value string) error {
	// On macOS, set via launchctl and shell profile
	cmd := exec.CommandContext(ctx, "launchctl", "setenv", key, value)
	return cmd.Run()
}

func (p *DarwinPlatform) AddToPath(ctx context.Context, dir string) error {
	// TODO: Add to shell profile
	return nil
}

func (p *DarwinPlatform) IsAdmin() bool {
	return os.Geteuid() == 0
}

func (p *DarwinPlatform) PackageManagers() []string {
	var pms []string
	if _, err := exec.LookPath("brew"); err == nil {
		pms = append(pms, "homebrew")
	}
	return pms
}

func (p *DarwinPlatform) DefaultShell() string {
	shell := os.Getenv("SHELL")
	if shell != "" {
		return shell
	}
	return "/bin/zsh"
}