package core

import (
	"bytes"
	"sync"
	"testing"
	"time"

	"github.com/chainreactors/logs"
	"github.com/chainreactors/utils/parsers"
	"github.com/chainreactors/spray/core/baseline"
	"github.com/chainreactors/spray/pkg"
)

func mustFinishCore(t *testing.T, d time.Duration, msg string, fn func()) {
	t.Helper()
	done := make(chan struct{})
	go func() { fn(); close(done) }()
	select {
	case <-done:
	case <-time.After(d):
		t.Fatalf("timeout: %s", msg)
	}
}

func TestRecordStat_ConcurrentSafety(t *testing.T) {
	r := &Runner{}

	var wg sync.WaitGroup
	for i := 0; i < 100; i++ {
		wg.Add(1)
		go func(n int) {
			defer wg.Done()
			r.recordStat(&pkg.Statistor{
				Total:        n,
				ReqTotal:     int32(n * 2),
				FoundNumber:  1,
				FailedNumber: 0,
			})
		}(i)
	}

	mustFinishCore(t, 5*time.Second, "concurrent recordStat deadlocked", func() {
		wg.Wait()
	})

	stats := r.Stats()
	if stats.Requests == 0 {
		t.Fatal("stats.Requests should be > 0 after concurrent writes")
	}
}

func TestRecordStat_NilStat(t *testing.T) {
	r := &Runner{}
	r.recordStat(nil)

	stats := r.Stats()
	if stats.Requests != 0 {
		t.Fatalf("stats.Requests = %d, want 0 for nil stat", stats.Requests)
	}
}

func TestOutputHandlerSuppressesFuzzyChannelWithoutFuzzyFlag(t *testing.T) {
	var out bytes.Buffer
	oldLog := logs.Log
	logs.Log = logs.NewLogger(oldLog.Level)
	logs.Log.SetOutput(&out)
	t.Cleanup(func() {
		logs.Log = oldLog
	})

	r := &Runner{
		Option:   &Option{},
		OutputCh: make(chan *baseline.Baseline, 1),
		FuzzyCh:  make(chan *baseline.Baseline, 1),
		OutWg:    &sync.WaitGroup{},
	}
	r.OutputHandler()

	r.OutWg.Add(1)
	r.FuzzyCh <- &baseline.Baseline{
		SprayResult: &parsers.SprayResult{
			UrlString:  "http://example.com/fuzzy",
			Status:     400,
			BodyLength: 100,
			IsValid:    true,
			IsFuzzy:    true,
			Reason:     pkg.ErrFuzzyCompareFailed.Error(),
			Source:     parsers.CommonFileSource,
		},
	}
	mustFinishCore(t, 2*time.Second, "fuzzy output was not drained", func() {
		r.OutWg.Wait()
	})
	close(r.OutputCh)
	close(r.FuzzyCh)

	if got := out.String(); got != "" {
		t.Fatalf("fuzzy output without --fuzzy = %q, want empty", got)
	}
}