package test

import (
	"RenewCMS/internal/infrastructure/config"
	"testing"
	"time"
)

func setBaseSettingsEnv(t *testing.T) {
	t.Helper()
	t.Setenv("ENVIRONMENT", "production")
	t.Setenv("PUBLIC_URL", "https://cms.example.com")
	t.Setenv("UPLOAD_DIR", "./data/uploads")
	t.Setenv("JWT_SECRET", "test-secret")
	t.Setenv("DB_FILE", "./data/renewcms.db")
	t.Setenv("PORT", "8080")
	t.Setenv("SMTP_EMAIL", "notify@example.com")
	t.Setenv("SMTP_PASSWORD", "hunter2")
	t.Setenv("SMTP_HOST", "smtp.example.com")
	t.Setenv("SMTP_PORT", "465")
	t.Setenv("CORS_ALLOWED_ORIGINS", "")
	t.Setenv("AUTH_RATE_LIMIT_MAX_ATTEMPTS", "5")
	t.Setenv("AUTH_RATE_LIMIT_WINDOW_SECONDS", "60")
}

func TestNewSettingsFromEnvReadsAllFields(t *testing.T) {
	setBaseSettingsEnv(t)
	t.Setenv("CORS_ALLOWED_ORIGINS", "https://cms.example.com;https://admin.example.com")

	settings, err := config.NewSettingsFromEnv()
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}

	if settings.Environment != "production" {
		t.Errorf("expected Environment %q, got %q", "production", settings.Environment)
	}
	if settings.PublicURL != "https://cms.example.com" {
		t.Errorf("expected PublicURL %q, got %q", "https://cms.example.com", settings.PublicURL)
	}
	if settings.UploadDir != "./data/uploads" {
		t.Errorf("expected UploadDir %q, got %q", "./data/uploads", settings.UploadDir)
	}
	if settings.JWTSecret != "test-secret" {
		t.Errorf("expected JWTSecret %q, got %q", "test-secret", settings.JWTSecret)
	}
	if settings.DBFile != "./data/renewcms.db" {
		t.Errorf("expected DBFile %q, got %q", "./data/renewcms.db", settings.DBFile)
	}
	if settings.Port != "8080" {
		t.Errorf("expected Port %q, got %q", "8080", settings.Port)
	}
	if settings.Smtp.Email != "notify@example.com" {
		t.Errorf("expected Smtp.Email %q, got %q", "notify@example.com", settings.Smtp.Email)
	}
	if settings.Smtp.Password != "hunter2" {
		t.Errorf("expected Smtp.Password %q, got %q", "hunter2", settings.Smtp.Password)
	}
	if settings.Smtp.Host != "smtp.example.com" {
		t.Errorf("expected Smtp.Host %q, got %q", "smtp.example.com", settings.Smtp.Host)
	}
	if settings.Smtp.Port != 465 {
		t.Errorf("expected Smtp.Port %d, got %d", 465, settings.Smtp.Port)
	}
	if settings.AuthRateLimit.MaxAttempts != 5 {
		t.Errorf("expected AuthRateLimit.MaxAttempts %d, got %d", 5, settings.AuthRateLimit.MaxAttempts)
	}
	if settings.AuthRateLimit.Window != 60*time.Second {
		t.Errorf("expected AuthRateLimit.Window %v, got %v", 60*time.Second, settings.AuthRateLimit.Window)
	}
	expectedOrigins := []string{"https://cms.example.com", "https://admin.example.com"}
	if len(settings.CorsAllowedOrigins) != len(expectedOrigins) {
		t.Fatalf("expected %d origins, got %v", len(expectedOrigins), settings.CorsAllowedOrigins)
	}
	for i, origin := range expectedOrigins {
		if settings.CorsAllowedOrigins[i] != origin {
			t.Errorf("expected origin %d to be %q, got %q", i, origin, settings.CorsAllowedOrigins[i])
		}
	}
}

func TestNewSettingsFromEnvEmptyCorsOriginsIsNil(t *testing.T) {
	setBaseSettingsEnv(t)

	settings, err := config.NewSettingsFromEnv()
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	if settings.CorsAllowedOrigins != nil {
		t.Errorf("expected nil CorsAllowedOrigins, got %v", settings.CorsAllowedOrigins)
	}
}

func TestNewSettingsFromEnvSingleCorsOrigin(t *testing.T) {
	setBaseSettingsEnv(t)
	t.Setenv("CORS_ALLOWED_ORIGINS", "https://cms.example.com")

	settings, err := config.NewSettingsFromEnv()
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	if len(settings.CorsAllowedOrigins) != 1 || settings.CorsAllowedOrigins[0] != "https://cms.example.com" {
		t.Errorf("expected a single origin %q, got %v", "https://cms.example.com", settings.CorsAllowedOrigins)
	}
}

func TestNewSettingsFromEnvInvalidSmtpPortReturnsError(t *testing.T) {
	setBaseSettingsEnv(t)
	t.Setenv("SMTP_PORT", "not-a-number")

	_, err := config.NewSettingsFromEnv()
	if err == nil {
		t.Fatal("expected an error for a non-numeric SMTP_PORT")
	}
}

func TestNewSettingsFromEnvInvalidAuthRateLimitMaxAttemptsReturnsError(t *testing.T) {
	setBaseSettingsEnv(t)
	t.Setenv("AUTH_RATE_LIMIT_MAX_ATTEMPTS", "not-a-number")

	_, err := config.NewSettingsFromEnv()
	if err == nil {
		t.Fatal("expected an error for a non-numeric AUTH_RATE_LIMIT_MAX_ATTEMPTS")
	}
}

func TestNewSettingsFromEnvInvalidAuthRateLimitWindowSecondsReturnsError(t *testing.T) {
	setBaseSettingsEnv(t)
	t.Setenv("AUTH_RATE_LIMIT_WINDOW_SECONDS", "not-a-number")

	_, err := config.NewSettingsFromEnv()
	if err == nil {
		t.Fatal("expected an error for a non-numeric AUTH_RATE_LIMIT_WINDOW_SECONDS")
	}
}

func TestSettingsIsProductionFalseForNonProductionEnvironment(t *testing.T) {
	settings := config.Settings{Environment: "development"}
	if settings.IsProduction() {
		t.Error("expected IsProduction to be false for environment \"development\"")
	}
}