package request

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

// Options 用于配置请求的各种选项
type Options struct {
	Headers http.Header

	StatusCodeFunc func(int) bool

	Timeout time.Duration
}

func NewOptions(options ...Option) *Options {
	o := &Options{
		Headers: http.Header{
			"Content-Type": []string{"application/json"},
		},

		StatusCodeFunc: func(code int) bool {
			return code == http.StatusOK
		},

		Timeout: 15 * time.Second,
	}

	for _, option := range options {
		option(o)
	}

	return o
}

type Option func(*Options)

func WithTimeout(timeout time.Duration) Option {
	return func(options *Options) {
		options.Timeout = timeout
	}
}

func WithHeaders(headers http.Header) Option {
	return func(options *Options) {
		options.Headers = headers
	}
}

func WithStatusCodeFunc(statusCodeFunc func(int) bool) Option {
	return func(options *Options) {
		options.StatusCodeFunc = statusCodeFunc
	}
}

func Post(ctx context.Context, url string, body []byte, options ...Option) (http.Header, []byte, error) {
	return Request(ctx, http.MethodPost, url, body, NewOptions(options...))
}

func Get(ctx context.Context, url string, options ...Option) (http.Header, []byte, error) {
	return Request(ctx, http.MethodGet, url, nil, NewOptions(options...))
}

func Put(ctx context.Context, url string, body []byte, options ...Option) (http.Header, []byte, error) {
	return Request(ctx, http.MethodPut, url, body, NewOptions(options...))
}

func Request(_ context.Context, method, url string, body []byte, o *Options) (http.Header, []byte, error) {
	req, err := http.NewRequest(method, url, bytes.NewBuffer(body))
	if err != nil {
		return nil, nil, fmt.Errorf("创建HTTP请求失败: %w", err)
	}
	req.Header = o.Headers

	httpClient := &http.Client{
		Timeout: o.Timeout,
	}
	resp, err := httpClient.Do(req)
	if err != nil {
		return nil, nil, fmt.Errorf("发送HTTP请求失败: %w", err)
	}
	defer resp.Body.Close()

	bodyBytes, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, nil, fmt.Errorf("读取响应体失败: %w", err)
	}

	if !o.StatusCodeFunc(resp.StatusCode) {
		return nil, nil, fmt.Errorf("请求异常:%s", resp.Status)
	}

	return resp.Header, bodyBytes, nil
}