package config

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

func TestLoadDefaultsAndOverrides(t *testing.T) {
	cfg, err := Load("")
	if err != nil {
		t.Fatalf("Load default failed: %v", err)
	}
	if cfg.Server.Port != 3000 || cfg.Landing.DefaultLang != "ru" {
		t.Fatalf("unexpected default config: %+v", cfg)
	}

	tmpFile := filepath.Join(t.TempDir(), "polar.toml")
	tomlData := `
[server]
host = "127.0.0.1"
port = 4000
base_url = "https://git.example.com/"

[storage]
data_dir = "/var/lib/polar"

[auth]
registration_enabled = false

[landing]
enabled = false
default_lang = "en"
`
	if err := os.WriteFile(tmpFile, []byte(tomlData), 0o644); err != nil {
		t.Fatalf("write temp toml: %v", err)
	}

	t.Setenv("POLAR_SERVER_PORT", "8080")
	loaded, err := Load(tmpFile)
	if err != nil {
		t.Fatalf("Load from file failed: %v", err)
	}
	if loaded.Server.Port != 8080 {
		t.Fatalf("expected env POLAR_SERVER_PORT=8080 to override file port 4000, got %d", loaded.Server.Port)
	}
	if loaded.Server.BaseURL != "https://git.example.com" {
		t.Fatalf("expected trailing slash trimmed from base_url, got %q", loaded.Server.BaseURL)
	}
	if loaded.Auth.RegistrationEnabled {
		t.Fatalf("expected registration_enabled = false")
	}
	if loaded.Landing.DefaultLang != "en" {
		t.Fatalf("expected default_lang = en, got %q", loaded.Landing.DefaultLang)
	}
	if loaded.DBPath() != filepath.Join(loaded.Storage.DataDir, "polar.db") {
		t.Fatalf("expected DBPath to default to polar.db, got %q", loaded.DBPath())
	}
}