package config

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

	"git.eeqj.de/sneak/smartconfig"
)

func TestGetStringSlice_YAMLList(t *testing.T) {
	// Create a temp config file with YAML list format
	tmpDir := t.TempDir()
	configPath := filepath.Join(tmpDir, "config.yml")

	yamlContent := `
whitelist_hosts:
  - static.sneak.cloud
  - sneak.berlin
  - s3.sneak.cloud
`
	err := os.WriteFile(configPath, []byte(yamlContent), 0644)
	if err != nil {
		t.Fatalf("failed to write test config: %v", err)
	}

	// Load config using smartconfig
	sc, err := loadTestConfig(configPath)
	if err != nil {
		t.Fatalf("failed to load config: %v", err)
	}

	// Test that getStringSlice correctly parses YAML list
	hosts := getStringSlice(sc, "whitelist_hosts")

	if len(hosts) != 3 {
		t.Errorf("expected 3 hosts, got %d: %v", len(hosts), hosts)
	}

	expected := []string{"static.sneak.cloud", "sneak.berlin", "s3.sneak.cloud"}
	for i, want := range expected {
		if i >= len(hosts) {
			t.Errorf("missing host at index %d: want %q", i, want)
			continue
		}
		if hosts[i] != want {
			t.Errorf("host[%d] = %q, want %q", i, hosts[i], want)
		}
	}
}

func TestGetStringSlice_CommaSeparated(t *testing.T) {
	// Test backwards compatibility with comma-separated string
	tmpDir := t.TempDir()
	configPath := filepath.Join(tmpDir, "config.yml")

	yamlContent := `whitelist_hosts: "static.sneak.cloud, sneak.berlin, s3.sneak.cloud"`

	err := os.WriteFile(configPath, []byte(yamlContent), 0644)
	if err != nil {
		t.Fatalf("failed to write test config: %v", err)
	}

	sc, err := loadTestConfig(configPath)
	if err != nil {
		t.Fatalf("failed to load config: %v", err)
	}

	hosts := getStringSlice(sc, "whitelist_hosts")

	if len(hosts) != 3 {
		t.Errorf("expected 3 hosts, got %d: %v", len(hosts), hosts)
	}

	expected := []string{"static.sneak.cloud", "sneak.berlin", "s3.sneak.cloud"}
	for i, want := range expected {
		if i >= len(hosts) {
			t.Errorf("missing host at index %d: want %q", i, want)
			continue
		}
		if hosts[i] != want {
			t.Errorf("host[%d] = %q, want %q", i, hosts[i], want)
		}
	}
}

func TestGetStringSlice_Empty(t *testing.T) {
	tmpDir := t.TempDir()
	configPath := filepath.Join(tmpDir, "config.yml")

	yamlContent := `port: 8080`

	err := os.WriteFile(configPath, []byte(yamlContent), 0644)
	if err != nil {
		t.Fatalf("failed to write test config: %v", err)
	}

	sc, err := loadTestConfig(configPath)
	if err != nil {
		t.Fatalf("failed to load config: %v", err)
	}

	hosts := getStringSlice(sc, "whitelist_hosts")

	if hosts != nil && len(hosts) != 0 {
		t.Errorf("expected nil or empty slice, got %v", hosts)
	}
}

// loadTestConfig is a helper to load a config file for testing
func loadTestConfig(path string) (*smartconfig.Config, error) {
	return smartconfig.NewFromConfigPath(path)
}