package config

import (
	"os"
	"testing"
)

func withTempDir(t *testing.T) {
	t.Helper()
	dir := t.TempDir()
	configDirOverride = dir
	t.Cleanup(func() { configDirOverride = "" })
}

func TestLoad_Defaults(t *testing.T) {
	withTempDir(t)

	cfg := Load()
	if cfg.SyncthingAddress != "localhost:8384" {
		t.Errorf("expected default address, got %q", cfg.SyncthingAddress)
	}
	if !cfg.SyncthingInsecureTLS {
		t.Error("SyncthingInsecureTLS should default to true")
	}
	if !cfg.EnableNotifications {
		t.Error("EnableNotifications should default to true")
	}
}

func TestSaveLoadRoundTrip(t *testing.T) {
	withTempDir(t)

	cfg := Load()
	cfg.SyncthingAPIKey = "test-key-12345"
	cfg.SyncthingAddress = "192.168.1.100:8384"
	cfg.EnableRecentFiles = false

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

	// Clear cache so Load reads from disk
	mu.Lock()
	cached = nil
	mu.Unlock()

	loaded := Load()
	if loaded.SyncthingAPIKey != "test-key-12345" {
		t.Errorf("API key not round-tripped: got %q", loaded.SyncthingAPIKey)
	}
	if loaded.SyncthingAddress != "192.168.1.100:8384" {
		t.Errorf("address not round-tripped: got %q", loaded.SyncthingAddress)
	}
	if loaded.EnableRecentFiles {
		t.Error("EnableRecentFiles should be false after round-trip")
	}
}

func TestBaseURL_TLSToggle(t *testing.T) {
	cfg := Config{
		SyncthingAddress: "localhost:8384",
		SyncthingUseTLS:  false,
	}
	if cfg.BaseURL() != "http://localhost:8384" {
		t.Errorf("expected http URL, got %q", cfg.BaseURL())
	}

	cfg.SyncthingUseTLS = true
	if cfg.BaseURL() != "https://localhost:8384" {
		t.Errorf("expected https URL, got %q", cfg.BaseURL())
	}
}

func TestLoad_InvalidJSON(t *testing.T) {
	withTempDir(t)

	// Write invalid JSON to the config path
	if err := os.MkdirAll(configDir(), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(ConfigPath(), []byte("{invalid"), 0o644); err != nil {
		t.Fatal(err)
	}

	// Should return defaults without panicking
	cfg := Load()
	if cfg.SyncthingAddress != "localhost:8384" {
		t.Errorf("expected defaults on invalid JSON, got %q", cfg.SyncthingAddress)
	}
}