package database

import (
	"testing"
	"time"

	"github.com/prometheus/client_golang/prometheus"
)

func TestDefaultConfigOptions(t *testing.T) {
	opts := DefaultConfigOptions()

	// Verify expected defaults for API package
	if opts.MaxOpenConns != 25 {
		t.Errorf("Expected MaxOpenConns=25, got %d", opts.MaxOpenConns)
	}
	if opts.MaxIdleConns != 10 {
		t.Errorf("Expected MaxIdleConns=10, got %d", opts.MaxIdleConns)
	}
	if opts.ConnMaxLifetime != 3*time.Minute {
		t.Errorf("Expected ConnMaxLifetime=3m, got %v", opts.ConnMaxLifetime)
	}
	if !opts.EnablePoolMonitoring {
		t.Error("Expected EnablePoolMonitoring=true")
	}
	if opts.PrometheusRegisterer != prometheus.DefaultRegisterer {
		t.Error("Expected PrometheusRegisterer to be DefaultRegisterer")
	}
	if len(opts.ConfigFiles) == 0 {
		t.Error("Expected ConfigFiles to be non-empty")
	}
}

func TestMonitorConfigOptions(t *testing.T) {
	opts := MonitorConfigOptions()

	// Verify expected defaults for Monitor package
	if opts.MaxOpenConns != 10 {
		t.Errorf("Expected MaxOpenConns=10, got %d", opts.MaxOpenConns)
	}
	if opts.MaxIdleConns != 5 {
		t.Errorf("Expected MaxIdleConns=5, got %d", opts.MaxIdleConns)
	}
	if opts.ConnMaxLifetime != 3*time.Minute {
		t.Errorf("Expected ConnMaxLifetime=3m, got %v", opts.ConnMaxLifetime)
	}
	if opts.EnablePoolMonitoring {
		t.Error("Expected EnablePoolMonitoring=false")
	}
	if opts.PrometheusRegisterer != nil {
		t.Error("Expected PrometheusRegisterer to be nil")
	}
	if len(opts.ConfigFiles) == 0 {
		t.Error("Expected ConfigFiles to be non-empty")
	}
}

func TestConfigStructures(t *testing.T) {
	// Test that configuration structures can be created and populated
	config := Config{
		MySQL: DBConfig{
			DSN:    "user:pass@tcp(localhost:3306)/dbname",
			User:   "testuser",
			Pass:   "testpass",
			DBName: "testdb",
		},
	}

	if config.MySQL.DSN == "" {
		t.Error("Expected DSN to be set")
	}
	if config.MySQL.User != "testuser" {
		t.Errorf("Expected User='testuser', got '%s'", config.MySQL.User)
	}
	if config.MySQL.Pass != "testpass" {
		t.Errorf("Expected Pass='testpass', got '%s'", config.MySQL.Pass)
	}
	if config.MySQL.DBName != "testdb" {
		t.Errorf("Expected DBName='testdb', got '%s'", config.MySQL.DBName)
	}
}