package go_benchmark

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"sync"

	"gitea.urkob.com/urko/crono"
)

func doRequest(wg *sync.WaitGroup, host, employeeID string, errChan chan error) error {
	defer wg.Done()
	url := host + "/employee_wi/" + employeeID
	client := &http.Client{}
	req, err := http.NewRequest("GET", url, nil)

	if err != nil {
		err = fmt.Errorf("http.NewRequest: %s", err)
		errChan <- err
		return err
	}
	req.Header.Add("Cache-Control", "no-cache")
	req.Header.Add("Content-Type", "application/json")

	res, err := client.Do(req)
	if err != nil {
		err = fmt.Errorf("client.Do: %s", err)
		errChan <- err
		return err
	}
	defer res.Body.Close()

	readedBody, err := io.ReadAll(res.Body)
	if err != nil {
		err = fmt.Errorf("ioutil.ReadAll: %s", err)
		errChan <- err
		return err
	}

	log.Println("readed", string(readedBody))

	return nil
}

func BenchmarkNoLog(host, employeeID string, totalRequests int) error {
	return benchmark(host, employeeID, totalRequests, false)
}
func Benchmark(host, employeeID string, totalRequests int) error {
	return benchmark(host, employeeID, totalRequests, true)
}

func benchmark(host, employeeID string, totalRequests int, dolog bool) error {
	cr := crono.New()
	if dolog {
		defer cr.Table()
	}

	wg := &sync.WaitGroup{}
	errChan := make(chan error, 1)
	wg.Add(totalRequests + 1)
	go func(errChan chan error) {
		defer wg.Done()
		defer func() {
			errChan <- nil
		}()
		for i := 0; i < totalRequests; i++ {
			go doRequest(wg, host, employeeID, errChan)
		}
	}(errChan)

	wg.Wait()

	if err := <-errChan; err != nil {
		return fmt.Errorf("Benchmark: %s", err)
	}
	if dolog {
		cr.MarkAndRestart(fmt.Sprintf("go handle %d response", totalRequests))
	}

	return nil
}