package services

import (
	"context"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"

	"github.com/nutcas3/telecom-platform/apps/api-server/internal/config"
	"github.com/nutcas3/telecom-platform/apps/api-server/internal/database"
)

// newChargingService builds a ChargingService backed by an in-memory SQLite DB.
// NOTE: We intentionally do not AutoMigrate models.Subscriber / models.Session because
// they embed structs (PLMN, SNSSAI, QoSProfile) without Valuer/Scanner implementations,
// which GORM cannot map to SQLite. Tests that exercise those tables are skipped.
func newChargingService(t *testing.T) *ChargingService {
	gormDB, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	require.NoError(t, err)

	db := &database.Database{DB: gormDB}
	cfg := &config.Config{
		ChargingEngine: config.ChargingEngineConfig{
			BaseURL: "http://localhost:3001",
			Timeout: 1 * time.Second,
		},
	}
	return NewChargingService(db, cfg)
}

func TestGetHealthStatus(t *testing.T) {
	service := newChargingService(t)

	health, err := service.GetHealthStatus(context.Background())
	require.NoError(t, err)
	require.NotNil(t, health)

	// GetHealthStatus currently returns hardcoded values (no DB access)
	assert.True(t, health.RedisConnected)
	assert.True(t, health.ActiveSync)
	assert.False(t, health.LastSync.IsZero())
	assert.Greater(t, health.MemoryUsage, float64(0))
}

func TestGetSystemStats(t *testing.T) {
	t.Skip("GetSystemStats depends on Subscriber/Session models whose embedded structs " +
		"(PLMN/SNSSAI/QoSProfile) lack Valuer/Scanner and can't be migrated by GORM into SQLite. " +
		"Covered by integration tests running against Postgres.")
}

func TestGetUsageStats(t *testing.T) {
	t.Skip("Requires Subscriber/Session models - see TestGetSystemStats note.")
}

func TestGetRealTimeUsage(t *testing.T) {
	t.Skip("Requires Subscriber/Session models - see TestGetSystemStats note.")
}

func TestListUsageEvents(t *testing.T) {
	t.Skip("Requires Subscriber/Session models - see TestGetSystemStats note.")
}

func TestSearchUsageEvents(t *testing.T) {
	t.Skip("Requires Subscriber/Session models - see TestGetSystemStats note.")
}

func TestTriggerMaintenance(t *testing.T) {
	t.Skip("Requires Subscriber/Session models - see TestGetSystemStats note.")
}