package conf

import (
	"embed"
	"errors"
	"io"
	"log"
	"net/http"
	"os"
	"path"
	"path/filepath"

	"github.com/pelletier/go-toml/v2"
)

type Asset struct {
	Path string
	Url  string
}

func (asset *Asset) fetchIfNotExists(staticPath string) {
	destPath := filepath.Join(staticPath, asset.Path)

	err := os.MkdirAll(path.Dir(destPath), os.FileMode(0750))
	if err != nil {
		log.Printf("Couldn't create parent dirs of %s\n", destPath)
		panic(err)
	}

	out, err := os.OpenFile(
		destPath,
		os.O_WRONLY|os.O_CREATE|os.O_EXCL,
		0666,
	)
	if err != nil {
		if errors.Is(err, os.ErrExist) {
			log.Printf("%s already exists\n", destPath)
			return
		}
		panic(err)
	}
	defer out.Close()

	resp, err := http.Get(asset.Url)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	_, err = io.Copy(out, resp.Body)
	if err != nil {
		panic(err)
	}
}

type Config struct {
	Address   string
	Protocol  string
	Extension string
	NotesDir  string
}

var (
	Conf   Config
	assets []Asset = []Asset{
		{Path: "css/bootstrap.min.css", Url: "https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css"},
		{Path: "css/tiny-mde.min.css", Url: "https://unpkg.com/tiny-markdown-editor/dist/tiny-mde.min.css"},
		{Path: "js/tiny-mde.min.js", Url: "https://unpkg.com/tiny-markdown-editor/dist/tiny-mde.min.js"},
		{Path: "icons/eye.svg", Url: "https://raw.githubusercontent.com/twbs/icons/refs/heads/main/icons/eye.svg"},
	}
	BaseTemplate string = "base.tmpl.html"
	//go:embed static/*
	Static embed.FS
	//go:embed templates/*
	Templates embed.FS
)

func LoadConfig(path string) {
	var err error

	b, err := os.ReadFile(path)
	if err != nil {
		log.Fatal(err)
	}

	err = toml.Unmarshal([]byte(b), &Conf)
	if err != nil {
		log.Fatal(err)
	}
}

func FetchAssets() {
	for _, asset := range assets {
		asset.fetchIfNotExists("./internal/conf/static")
	}
}