package extapi

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"time"
)

// Client mendefinisikan kontrak fleksibel untuk mengirim HTTP request ke pihak ketiga/API internal.
type Client interface {
	PostJSON(ctx context.Context, url string, token string, payload interface{}) ([]byte, int, error)
	GetJSON(ctx context.Context, url string, token string) ([]byte, int, error)
}

type clientImpl struct {
	httpClient *http.Client
}

// NewClient membuat instance baru dari Client dengan batas timeout tertentu.
func NewClient(timeout time.Duration) Client {
	return &clientImpl{
		httpClient: &http.Client{Timeout: timeout},
	}
}

func (c *clientImpl) PostJSON(ctx context.Context, url string, token string, payload interface{}) ([]byte, int, error) {
	jsonData, err := json.Marshal(payload)
	if err != nil {
		return nil, 0, fmt.Errorf("gagal marshal payload: %w", err)
	}

	req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(jsonData))
	if err != nil {
		return nil, 0, fmt.Errorf("gagal membuat request: %w", err)
	}

	req.Header.Set("Content-Type", "application/json")
	if token != "" {
		req.Header.Set("Authorization", "Bearer "+token)
	}

	res, err := c.httpClient.Do(req)
	if err != nil {
		return nil, 0, fmt.Errorf("request gagal dieksekusi: %w", err)
	}
	defer res.Body.Close()

	respBody, err := io.ReadAll(res.Body)
	if err != nil {
		return nil, res.StatusCode, fmt.Errorf("gagal membaca body response: %w", err)
	}

	return respBody, res.StatusCode, nil
}

func (c *clientImpl) GetJSON(ctx context.Context, url string, token string) ([]byte, int, error) {
	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
	if err != nil {
		return nil, 0, fmt.Errorf("gagal membuat request: %w", err)
	}

	req.Header.Set("Accept", "application/json")
	if token != "" {
		req.Header.Set("Authorization", "Bearer "+token)
	}

	res, err := c.httpClient.Do(req)
	if err != nil {
		return nil, 0, fmt.Errorf("request gagal dieksekusi: %w", err)
	}
	defer res.Body.Close()

	respBody, err := io.ReadAll(res.Body)
	if err != nil {
		return nil, res.StatusCode, fmt.Errorf("gagal membaca body response: %w", err)
	}

	return respBody, res.StatusCode, nil
}