package service

import (
	"encoding/json"
	"fmt"
	"strings"
	"testing"
	"time"

	"github.com/mhsanaei/3x-ui/v3/internal/database"
	"github.com/mhsanaei/3x-ui/v3/internal/database/model"
	"github.com/mhsanaei/3x-ui/v3/internal/logger"
	"github.com/mhsanaei/3x-ui/v3/internal/xray"
)

func BenchmarkGetXrayConfigDisabledClients(b *testing.B) {
	b.Setenv("XUI_LOG_FOLDER", b.TempDir())
	setupScaleDB(b)
	b.Cleanup(logger.CloseLogger)
	seedScaleDataset(b, 2000, 5)
	db := database.GetDB()
	// Fix the generated credentials and lifecycle values for before/after comparisons.
	if err := db.Model(&model.ClientRecord{}).Where("id > 0").
		Updates(map[string]any{"uuid": "11111111-1111-1111-1111-111111111111", "expiry_time": 0}).Error; err != nil {
		b.Fatal(err)
	}
	if err := db.Model(&model.Inbound{}).Where("id > 0").Update("settings", `{"clients":[]}`).Error; err != nil {
		b.Fatal(err)
	}
	if err := db.Model(&xray.ClientTraffic{}).Where("id > 0").
		Updates(map[string]any{"enable": false, "expiry_time": 0}).Error; err != nil {
		b.Fatal(err)
	}
	svc := &XrayService{}
	b.ReportAllocs()
	b.ResetTimer()
	for range b.N {
		if _, err := svc.GetXrayConfig(); err != nil {
			b.Fatal(err)
		}
	}
	b.StopTimer()
	const marker = "disabled-client benchmark log boundary"
	logger.Info(marker)
	if _, err := svc.GetXrayConfig(); err != nil {
		b.Fatal(err)
	}
	entries, bytes := 0, 0
	for _, line := range logger.GetLogs(10000, "DEBUG") {
		if strings.HasSuffix(line, " INFO - "+marker) {
			break
		}
		entries++
		bytes += len(line) + 1
	}
	b.ReportMetric(float64(entries), "logs/op")
	b.ReportMetric(float64(bytes), "buffered-log-bytes/op")
}

// TestGetXrayConfigScale measures building the full Xray config (the path
// every restart/reconcile takes) and, separately, how much of the per-inbound
// settings rebuild is spent on indented vs plain JSON marshaling.
func TestGetXrayConfigScale(t *testing.T) {
	setupScaleDB(t)
	svc := &XrayService{}
	shapes := []struct {
		name     string
		inbounds int
	}{{"single", 1}, {"spread50", 50}}

	for _, n := range scaleSizes(t, 10000, 100000) {
		for _, shape := range shapes {
			t.Run(fmt.Sprintf("N=%d_%s", n, shape.name), func(t *testing.T) {
				ds := seedScaleDataset(t, n, shape.inbounds)

				const reps = 3
				start := time.Now()
				for range reps {
					cfg, err := svc.GetXrayConfig()
					if err != nil {
						t.Fatalf("GetXrayConfig: %v", err)
					}
					if len(cfg.InboundConfigs) < shape.inbounds {
						t.Fatalf("config has %d inbounds, want >= %d", len(cfg.InboundConfigs), shape.inbounds)
					}
				}
				t.Logf("N=%-7d shape=%-8s GetXrayConfig=%v/run",
					n, shape.name, (time.Since(start) / reps).Round(time.Millisecond))

				var ib model.Inbound
				if err := database.GetDB().First(&ib, ds.inboundIds[0]).Error; err != nil {
					t.Fatalf("load inbound: %v", err)
				}
				settings := map[string]any{}
				if err := json.Unmarshal([]byte(ib.Settings), &settings); err != nil {
					t.Fatalf("unmarshal settings: %v", err)
				}
				start = time.Now()
				if _, err := json.Marshal(settings); err != nil {
					t.Fatalf("marshal settings: %v", err)
				}
				plain := time.Since(start)
				start = time.Now()
				if _, err := json.MarshalIndent(settings, "", "  "); err != nil {
					t.Fatalf("marshal indent settings: %v", err)
				}
				indented := time.Since(start)
				t.Logf("N=%-7d shape=%-8s settingsMarshal plain=%-9v indent=%v",
					n, shape.name, plain.Round(time.Millisecond), indented.Round(time.Millisecond))
			})
		}
	}
}