package main

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
)

const downloadURL = "https://raw.githubusercontent.com/Fyrd/caniuse/main/data.json"

// Download downloads caniuse data to path
func Download(path string) error {
	res, err := http.Get(downloadURL)
	if err != nil {
		return fmt.Errorf("could not get data: %v", err)
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		return fmt.Errorf("could not download data: %s", res.Status)
	}

	fi, err := os.Create(path)
	if err != nil {
		return fmt.Errorf("could not create %q: %v", path, err)
	}
	defer fi.Close()

	_, err = io.Copy(fi, res.Body)
	return err
}

func Load(path string) (Data, error) {
	var data Data

	fi, err := os.Open(path)
	if err != nil {
		return data, fmt.Errorf("could not read data: %v", err)
	}
	defer fi.Close()

	return data, json.NewDecoder(fi).Decode(&data)
}