package config_test

import (
	"os"
	"path/filepath"
	"testing"

	"git.tukangketik.id/swanadiva/hostkeeper/pkg/config"
)

func tempDir(t *testing.T) string {
	t.Helper()
	dir, err := os.MkdirTemp("", "config-test-*")
	if err != nil {
		t.Fatalf("Failed to create temp dir: %v", err)
	}
	t.Cleanup(func() { os.RemoveAll(dir) })
	return dir
}

// 4.1 New first run — creates default config
func TestNewFirstRun(t *testing.T) {
	dir := tempDir(t)

	// Override HOME to use temp dir
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, err := config.New()
	if err != nil {
		t.Fatalf("New failed: %v", err)
	}
	if cfg == nil {
		t.Fatal("New should return non-nil Config")
	}

	appCfg := cfg.GetAppConfig()
	if appCfg == nil {
		t.Fatal("GetAppConfig should return non-nil")
	}
	if appCfg.Version != "1.0.0" {
		t.Errorf("Version = %q, want %q", appCfg.Version, "1.0.0")
	}
	if appCfg.Theme != "dark" {
		t.Errorf("Theme = %q, want %q", appCfg.Theme, "dark")
	}
}

// 4.3 Save
func TestSave(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	appCfg := cfg.GetAppConfig()
	appCfg.Theme = "light"

	err := cfg.Save()
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}

	// Reload and verify
	cfg2, _ := config.New()
	if cfg2.GetAppConfig().Theme != "light" {
		t.Errorf("After Save, Theme = %q, want %q", cfg2.GetAppConfig().Theme, "light")
	}
}

// 4.4 UpdateAppConfig
func TestUpdateAppConfig(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	appCfg := cfg.GetAppConfig()
	appCfg.Theme = "dracula"
	appCfg.DefaultPort = 2222

	err := cfg.UpdateAppConfig(appCfg)
	if err != nil {
		t.Fatalf("UpdateAppConfig failed: %v", err)
	}

	// Reload and verify
	cfg2, _ := config.New()
	if cfg2.GetAppConfig().Theme != "dracula" {
		t.Errorf("After UpdateAppConfig, Theme = %q, want %q", cfg2.GetAppConfig().Theme, "dracula")
	}
	if cfg2.GetAppConfig().DefaultPort != 2222 {
		t.Errorf("After UpdateAppConfig, DefaultPort = %d, want 2222", cfg2.GetAppConfig().DefaultPort)
	}
}

// 4.5 GetConfigDir
func TestGetConfigDir(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	configDir := cfg.GetConfigDir()
	if configDir == "" {
		t.Error("GetConfigDir should return non-empty path")
	}
	if !filepath.IsAbs(configDir) {
		t.Errorf("GetConfigDir should return absolute path, got %q", configDir)
	}
}

// 4.6 GetDataDir
func TestGetDataDir(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	dataDir := cfg.GetDataDir()
	if dataDir == "" {
		t.Error("GetDataDir should return non-empty path")
	}
	if !filepath.IsAbs(dataDir) {
		t.Errorf("GetDataDir should return absolute path, got %q", dataDir)
	}
}

// 4.7 GetConfigFilePath
func TestGetConfigFilePath(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	path := cfg.GetConfigFilePath()
	if filepath.Base(path) != "config.json" {
		t.Errorf("GetConfigFilePath should end with config.json, got %q", path)
	}
}

// 4.8 GetHostsFilePath
func TestGetHostsFilePath(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	path := cfg.GetHostsFilePath()
	if filepath.Base(path) != "hosts.json" {
		t.Errorf("GetHostsFilePath should end with hosts.json, got %q", path)
	}
}

// 4.9 GetKeysFilePath
func TestGetKeysFilePath(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	path := cfg.GetKeysFilePath()
	if filepath.Base(path) != "keys.json" {
		t.Errorf("GetKeysFilePath should end with keys.json, got %q", path)
	}
}

// 4.10 GetSnippetsFilePath
func TestGetSnippetsFilePath(t *testing.T) {
	dir := tempDir(t)
	origHome := os.Getenv("HOME")
	os.Setenv("HOME", dir)
	defer os.Setenv("HOME", origHome)

	cfg, _ := config.New()
	path := cfg.GetSnippetsFilePath()
	if filepath.Base(path) != "snippets.json" {
		t.Errorf("GetSnippetsFilePath should end with snippets.json, got %q", path)
	}
}