package benchmark

import (
	"fmt"
	"log"
	"os"
	"strings"
	"sync"
	"testing"
	"time"

	go_benchmark "gitea.urkob.com/urko/ess-etl-go/benchmark/go"
	nest_benchmark "gitea.urkob.com/urko/ess-etl-go/benchmark/nest"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func init() {
	if err := os.RemoveAll("./dump"); err != nil {
		panic(fmt.Errorf("os.RemoveAll: %s", err))
	}
	if err := os.MkdirAll("./dump", os.ModeTemporary); err != nil {
		panic(fmt.Errorf("os.MkdirAll: %s", err))
	}
}

const bmNumberOfRequests = 100
const numberOfRequestsAtOnce = 1000
const seconds = 15

func BenchmarkGo(b *testing.B) {
	log.SetFlags(log.Lmicroseconds)
	logFileName := fmt.Sprintf("BenchmarkGo-%s.txt", time.Now().Format(strings.ReplaceAll(time.RFC1123Z, ":", "_")))
	f, err := os.OpenFile("./dump/"+logFileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o644)
	require.NoError(b, err)

	defer f.Close()
	log.SetOutput(f)
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		start := time.Now()
		assert.NoError(b, go_benchmark.BenchmarkNoLog(bmNumberOfRequests))
		b.Logf("Request took %v", time.Since(start))
		b.Logf("i %d | b.N %d", i, b.N)
	}
}
func BenchmarkNest(b *testing.B) {
	log.SetFlags(log.Lmicroseconds)
	logFileName := fmt.Sprintf("BenchmarkNest-%s.txt", time.Now().Format(strings.ReplaceAll(time.RFC1123Z, ":", "_")))
	f, err := os.OpenFile("./dump/"+logFileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o644)
	require.NoError(b, err)

	defer f.Close()
	log.SetOutput(f)
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		start := time.Now()
		assert.NoError(b, nest_benchmark.BenchmarkNoLog(bmNumberOfRequests))
		b.Logf("Request took %v", time.Since(start))
		b.Logf("i %d | b.N %d", i, b.N)
	}
}

func TestGoRequestsPerSecondFor15s(t *testing.T) {
	log.SetFlags(log.Lmicroseconds)
	logFileName := fmt.Sprintf("GoRequestsPerSecondFor15s-%s.txt", time.Now().Format(strings.ReplaceAll(time.RFC1123Z, ":", "_")))
	f, err := os.OpenFile("./dump/"+logFileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o644)
	require.NoError(t, err)

	defer f.Close()
	log.SetOutput(f)

	var wg sync.WaitGroup
	wg.Add(seconds)
	for i := 0; i < seconds; i++ {
		go func() {
			defer wg.Done()
			require.NoError(t, go_benchmark.Benchmark(numberOfRequestsAtOnce))
		}()
		time.Sleep(time.Second)
	}
	wg.Wait()
}

func TestNestRequestsPerSecondFor15s(t *testing.T) {
	log.SetFlags(log.Lmicroseconds)
	logFileName := fmt.Sprintf("NestRequestsPerSecondFor15s-%s.txt", time.Now().Format(strings.ReplaceAll(time.RFC1123Z, ":", "_")))
	f, err := os.OpenFile("./dump/"+logFileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o644)
	require.NoError(t, err)

	defer f.Close()
	log.SetOutput(f)

	var wg sync.WaitGroup
	wg.Add(seconds)
	for i := 0; i < seconds; i++ {
		go func() {
			defer wg.Done()
			require.NoError(t, nest_benchmark.Benchmark(numberOfRequestsAtOnce))
		}()
		time.Sleep(time.Second)
	}
	wg.Wait()
}

func TestGoRequests(t *testing.T) {
	log.SetFlags(log.Lmicroseconds)
	logFileName := fmt.Sprintf("%s.txt", time.Now().Format(strings.ReplaceAll(time.RFC1123Z, ":", "_")))
	f, err := os.OpenFile("./dump/"+logFileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o644)
	require.NoError(t, err)

	defer f.Close()
	log.SetOutput(f)

	require.NoError(t, go_benchmark.Benchmark(numberOfRequestsAtOnce))
}

func TestNestRequests(t *testing.T) {
	log.SetFlags(log.Lmicroseconds)
	logFileName := fmt.Sprintf("%s.txt", time.Now().Format(strings.ReplaceAll(time.RFC1123Z, ":", "_")))
	f, err := os.OpenFile("./dump/"+logFileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o644)
	require.NoError(t, err)

	defer f.Close()
	log.SetOutput(f)

	require.NoError(t, nest_benchmark.Benchmark(numberOfRequestsAtOnce))
}