package config

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

func TestDefaultConfigData(t *testing.T) {
	data := DefaultConfigData()
	if data.Misc.Version != CurrentConfigVersion {
		t.Fatalf("version = %q, want %q", data.Misc.Version, CurrentConfigVersion)
	}
	if data.Downloads.Folder == "" {
		t.Fatalf("downloads folder should not be empty")
	}
	if data.Database.DownloadsPath == "" || data.Database.FailedDownloadsPath == "" {
		t.Fatalf("database paths should not be empty")
	}
}

func TestLoadCreatesDefaultConfigWhenMissing(t *testing.T) {
	tmpDir := t.TempDir()
	path := filepath.Join(tmpDir, "config.toml")

	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}

	if cfg.Path != path {
		t.Fatalf("path = %q, want %q", cfg.Path, path)
	}
	if _, err = os.Stat(path); err != nil {
		t.Fatalf("expected created config file: %v", err)
	}
}

func TestLoadOutdatedConfig(t *testing.T) {
	tmpDir := t.TempDir()
	path := filepath.Join(tmpDir, "config.toml")

	data := DefaultConfigData()
	data.Misc.Version = "1.0.0"
	if err := saveConfigData(path, data); err != nil {
		t.Fatalf("saveConfigData() error = %v", err)
	}

	_, err := Load(path)
	if !errors.Is(err, ErrOutdatedConfig) {
		t.Fatalf("Load() error = %v, want ErrOutdatedConfig", err)
	}
}

func TestSessionCloneDoesNotAliasSlices(t *testing.T) {
	tmpDir := t.TempDir()
	path := filepath.Join(tmpDir, "config.toml")

	data := DefaultConfigData()
	data.Metadata.Exclude = []string{"lyrics"}
	data.Qobuz.Secrets = []string{"s1"}
	if err := saveConfigData(path, data); err != nil {
		t.Fatalf("saveConfigData() error = %v", err)
	}

	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}

	cfg.Session.Metadata.Exclude[0] = "comment"
	cfg.Session.Qobuz.Secrets[0] = "s2"

	if cfg.File.Metadata.Exclude[0] != "lyrics" {
		t.Fatalf("file metadata exclude unexpectedly mutated")
	}
	if cfg.File.Qobuz.Secrets[0] != "s1" {
		t.Fatalf("file qobuz secrets unexpectedly mutated")
	}
}