package config

import "testing"

func setRequiredEnv(t *testing.T) {
	t.Helper()
	t.Setenv("IMAP_HOST", "imap.example.com")
	t.Setenv("IMAP_PORT", "993")
	t.Setenv("IMAP_USER", "u")
	t.Setenv("IMAP_PASS", "p")
	t.Setenv("SMTP_HOST", "smtp.example.com")
	t.Setenv("SMTP_PORT", "587")
	t.Setenv("SMTP_USER", "u")
	t.Setenv("SMTP_PASS", "p")
	t.Setenv("OPENCLAW_URL", "http://openclaw.local")
	t.Setenv("BRIDGE_CALLBACK_TOKEN", "token")
	t.Setenv("SYSTEM_EMAIL", "system@example.com")
	t.Setenv("LISTEN_ADDR", ":8080")
	t.Setenv("WHITELIST_EMAILS", "")
	t.Setenv("IMAP_PROXY_URL", "")
	t.Setenv("OPENCLAW_API_KEY", "")
}

func TestLoad_DefaultCallbackBaseURL_WhenUnset(t *testing.T) {
	setRequiredEnv(t)
	t.Setenv("CALLBACK_BASE_URL", "")

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

	if cfg.CallbackBaseURL != "http://localhost:8080" {
		t.Fatalf("expected default callback base URL http://localhost:8080, got %q", cfg.CallbackBaseURL)
	}
}

func TestLoad_DefaultCallbackBaseURL_UsesListenPort(t *testing.T) {
	setRequiredEnv(t)
	t.Setenv("CALLBACK_BASE_URL", "")
	t.Setenv("LISTEN_ADDR", ":9090")

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

	if cfg.CallbackBaseURL != "http://localhost:9090" {
		t.Fatalf("expected callback base URL to follow LISTEN_ADDR port, got %q", cfg.CallbackBaseURL)
	}
}

func TestLoad_UsesCallbackBaseURL_WhenSet(t *testing.T) {
	setRequiredEnv(t)
	t.Setenv("CALLBACK_BASE_URL", "https://bridge.example.com")

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

	if cfg.CallbackBaseURL != "https://bridge.example.com" {
		t.Fatalf("expected callback base URL from env, got %q", cfg.CallbackBaseURL)
	}
}