package lib

import (
	"bytes"
	"encoding/json"
	"io"
	"net/http"
)

type PandocClient struct {
	client  *http.Client
	address string
}

func NewPandocClient(client *http.Client, address string) *PandocClient {
	return &PandocClient{
		client:  client,
		address: address,
	}
}

type convertRequest struct {
	Text string `json:"text"`
	From string `json:"from"`
	To   string `json:"to"`
}

func (client *PandocClient) convert(text, from, to string) (string, error) {
	body, err := json.Marshal(convertRequest{
		Text: text,
		From: from,
		To:   to,
	})
	if err != nil {
		return "", err
	}

	buf := bytes.NewBuffer(body)

	resp, err := client.client.Post(client.address, "application/json", buf)
	if err != nil {
		return "", err
	}

	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", err
	}

	body, err = io.ReadAll(resp.Body)
	if err != nil {
		return "", err
	}

	return string(body), nil
}

func (client *PandocClient) ConvertLatexToHtml5(text string) (string, error) {
	return client.convert(text, "latex", "html5")
}