cv-site/internal/config/config_test.go

package config

import (
	"os"
	"testing"
)

func TestLoad(t *testing.T) {
	// Clear environment variables for clean test
	_ = os.Unsetenv("PORT")
	_ = os.Unsetenv("HOST")
	_ = os.Unsetenv("GO_ENV")

	cfg := Load()

	// Test default values
	if cfg.Server.Port != "1999" {
		t.Errorf("Server.Port = %q, want %q", cfg.Server.Port, "1999")
	}

	if cfg.Server.Host != "localhost" {
		t.Errorf("Server.Host = %q, want %q", cfg.Server.Host, "localhost")
	}

	if cfg.Server.ReadTimeout != 15 {
		t.Errorf("Server.ReadTimeout = %d, want %d", cfg.Server.ReadTimeout, 15)
	}

	if cfg.Server.WriteTimeout != 15 {
		t.Errorf("Server.WriteTimeout = %d, want %d", cfg.Server.WriteTimeout, 15)
	}

	if cfg.Template.Dir != "templates" {
		t.Errorf("Template.Dir = %q, want %q", cfg.Template.Dir, "templates")
	}

	if cfg.Data.Dir != "data" {
		t.Errorf("Data.Dir = %q, want %q", cfg.Data.Dir, "data")
	}
}

func TestLoadWithEnvVars(t *testing.T) {
	// Set custom environment variables
	t.Setenv("PORT", "8080")
	t.Setenv("HOST", "0.0.0.0")
	t.Setenv("READ_TIMEOUT", "30")
	t.Setenv("WRITE_TIMEOUT", "45")

	cfg := Load()

	if cfg.Server.Port != "8080" {
		t.Errorf("Server.Port = %q, want %q", cfg.Server.Port, "8080")
	}

	if cfg.Server.Host != "0.0.0.0" {
		t.Errorf("Server.Host = %q, want %q", cfg.Server.Host, "0.0.0.0")
	}

	if cfg.Server.ReadTimeout != 30 {
		t.Errorf("Server.ReadTimeout = %d, want %d", cfg.Server.ReadTimeout, 30)
	}

	if cfg.Server.WriteTimeout != 45 {
		t.Errorf("Server.WriteTimeout = %d, want %d", cfg.Server.WriteTimeout, 45)
	}
}

func TestAddress(t *testing.T) {
	_ = os.Unsetenv("PORT")
	_ = os.Unsetenv("HOST")

	cfg := Load()
	addr := cfg.Address()

	if addr != "localhost:1999" {
		t.Errorf("Address() = %q, want %q", addr, "localhost:1999")
	}

	// Test with custom values
	t.Setenv("PORT", "3000")
	t.Setenv("HOST", "127.0.0.1")

	cfg = Load()
	addr = cfg.Address()

	if addr != "127.0.0.1:3000" {
		t.Errorf("Address() = %q, want %q", addr, "127.0.0.1:3000")
	}
}

func TestGetEnv(t *testing.T) {
	// Test with existing var
	t.Setenv("TEST_VAR", "test_value")

	result := getEnv("TEST_VAR", "default")
	if result != "test_value" {
		t.Errorf("getEnv with existing var = %q, want %q", result, "test_value")
	}

	// Test with non-existing var
	result = getEnv("NONEXISTENT_VAR", "default")
	if result != "default" {
		t.Errorf("getEnv with non-existing var = %q, want %q", result, "default")
	}
}

func TestGetEnvAsInt(t *testing.T) {
	// Test with valid int
	t.Setenv("INT_VAR", "42")

	result := getEnvAsInt("INT_VAR", 10)
	if result != 42 {
		t.Errorf("getEnvAsInt with valid int = %d, want %d", result, 42)
	}

	// Test with invalid int
	t.Setenv("INVALID_INT", "not_a_number")

	result = getEnvAsInt("INVALID_INT", 10)
	if result != 10 {
		t.Errorf("getEnvAsInt with invalid int = %d, want %d", result, 10)
	}

	// Test with non-existing var
	result = getEnvAsInt("NONEXISTENT_INT", 99)
	if result != 99 {
		t.Errorf("getEnvAsInt with non-existing var = %d, want %d", result, 99)
	}
}

func TestGetEnvAsBool(t *testing.T) {
	tests := []struct {
		name         string
		envValue     string
		defaultValue bool
		expected     bool
	}{
		{"True string", "true", false, true},
		{"False string", "false", true, false},
		{"1 as true", "1", false, true},
		{"0 as false", "0", true, false},
		{"Invalid returns default true", "invalid", true, true},
		{"Invalid returns default false", "invalid", false, false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			t.Setenv("BOOL_VAR", tt.envValue)

			result := getEnvAsBool("BOOL_VAR", tt.defaultValue)
			if result != tt.expected {
				t.Errorf("getEnvAsBool(%q, %v) = %v, want %v", tt.envValue, tt.defaultValue, result, tt.expected)
			}
		})
	}

	// Test non-existing var
	result := getEnvAsBool("NONEXISTENT_BOOL", true)
	if result != true {
		t.Errorf("getEnvAsBool with non-existing var = %v, want %v", result, true)
	}
}

func TestIsDevelopment(t *testing.T) {
	tests := []struct {
		name     string
		envValue string
		expected bool
	}{
		{"Development env", "development", true},
		{"Dev shorthand", "dev", true},
		{"Production env", "production", false},
		{"Prod shorthand", "prod", false},
		{"Empty (default)", "", true}, // Default is development
		{"Staging", "staging", false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if tt.envValue == "" {
				_ = os.Unsetenv("GO_ENV")
			} else {
				t.Setenv("GO_ENV", tt.envValue)
			}

			result := isDevelopment()
			if result != tt.expected {
				t.Errorf("isDevelopment() with GO_ENV=%q = %v, want %v", tt.envValue, result, tt.expected)
			}
		})
	}
}

func TestTemplateHotReload(t *testing.T) {
	// In development, hot reload should be true by default
	t.Setenv("GO_ENV", "development")
	_ = os.Unsetenv("TEMPLATE_HOT_RELOAD")

	cfg := Load()
	if !cfg.Template.HotReload {
		t.Error("HotReload should be true in development by default")
	}

	// Explicit false should override
	t.Setenv("TEMPLATE_HOT_RELOAD", "false")

	cfg = Load()
	if cfg.Template.HotReload {
		t.Error("HotReload should be false when explicitly set")
	}

	// In production, hot reload should be false by default
	t.Setenv("GO_ENV", "production")
	_ = os.Unsetenv("TEMPLATE_HOT_RELOAD")

	cfg = Load()
	if cfg.Template.HotReload {
		t.Error("HotReload should be false in production by default")
	}
}

func TestEmailConfig(t *testing.T) {
	_ = os.Unsetenv("SMTP_HOST")
	_ = os.Unsetenv("SMTP_PORT")
	_ = os.Unsetenv("SMTP_USER")
	_ = os.Unsetenv("SMTP_PASSWORD")

	cfg := Load()

	// Test defaults
	if cfg.Email.SMTPHost != "smtp.gmail.com" {
		t.Errorf("Email.SMTPHost = %q, want %q", cfg.Email.SMTPHost, "smtp.gmail.com")
	}

	if cfg.Email.SMTPPort != "587" {
		t.Errorf("Email.SMTPPort = %q, want %q", cfg.Email.SMTPPort, "587")
	}

	// Test custom values
	t.Setenv("SMTP_HOST", "mail.example.com")
	t.Setenv("SMTP_PORT", "465")

	cfg = Load()
	if cfg.Email.SMTPHost != "mail.example.com" {
		t.Errorf("Email.SMTPHost = %q, want %q", cfg.Email.SMTPHost, "mail.example.com")
	}

	if cfg.Email.SMTPPort != "465" {
		t.Errorf("Email.SMTPPort = %q, want %q", cfg.Email.SMTPPort, "465")
	}
}