package main

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

type note struct {
	Id      int64  `json:"id"`
	Title   string `json:"title"`
	Content string `json:"content"`
}

const endpoint = "http://localhost:8080/api"

func loadNotes() ([]note, error) {
	res, err := http.Get(endpoint + "/notes")
	if err != nil {
		return []note{}, nil
	}

	data, err := io.ReadAll(res.Body)
	if err != nil {
		return []note{}, nil
	}

	var loadedNotes []note
	json.Unmarshal(data, &loadedNotes)
	return loadedNotes, nil
}

func putNote(n note) error {
	json, err := json.Marshal(n)
	if err != nil {
		return err
	}

	req, err := http.NewRequest("PUT", endpoint+"/notes/"+fmt.Sprint(n.Id), bytes.NewReader(json))
	if err != nil {
		return err
	}

	req.Header.Add("Content-Type", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return err
	}

	if res.StatusCode != http.StatusOK {
		return errors.New("Request failed: " + res.Status)
	}

	return nil
}

func postNote(n note) (note, error) {
	jsonBytes, err := json.Marshal(n)
	if err != nil {
		return note{}, err
	}

	res, err := http.Post(endpoint+"/notes", "application/json", bytes.NewReader(jsonBytes))
	if err != nil {
		return note{}, err
	}

	if res.StatusCode != http.StatusCreated {
		return note{}, errors.New("Request failed: " + res.Status)
	}

	resBytes, err := io.ReadAll(res.Body)
	if err != nil {
		return note{}, err
	}

	err = json.Unmarshal(resBytes, &n)
	if err != nil {
		return note{}, err
	}

	return n, nil
}

func deleteNote(n note) error {
	req, err := http.NewRequest("DELETE", endpoint+"/notes/"+fmt.Sprint(n.Id), bytes.NewReader([]byte{}))
	if err != nil {
		return err
	}

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return err
	}

	if res.StatusCode != http.StatusOK {
		return errors.New("Request failed: " + res.Status)
	}

	return nil
}