package main

import (
	_ "embed"
	"fmt"
	"io"
	"log"
	"os"
	"regexp"
)

var rootUrl = `https://wowprogramming.com/`
var apiUrl = fmt.Sprintf("%s/docs/api.html", rootUrl)

var Error *log.Logger
var Warning *log.Logger

func init() {
	log.SetFlags(log.Lmicroseconds | log.Lshortfile)
	logFile, err := os.Create("main.log")
	if err != nil {
		log.Printf("Error creating log file: %v", err)
		os.Exit(1)
	}
	logger := io.MultiWriter(os.Stdout, logFile)
	log.SetOutput(logger)

	Error = log.New(io.MultiWriter(logFile, os.Stderr, os.Stdout),
		fmt.Sprintf("%sERROR:%s ", "\033[0;101m", "\033[0m"),
		log.Lmicroseconds|log.Lshortfile)
	Warning = log.New(io.MultiWriter(logFile, os.Stdout),
		fmt.Sprintf("%sWarning:%s ", "\033[0;93m", "\033[0m"),
		log.Lmicroseconds|log.Lshortfile)
}

//go:embed test.html
var html string

//go:embed doc.html
var doc string

var pageNameExtractor = regexp.MustCompile(`\/([^/]+).html`)
var outDir = "out"

func main() {
	res, err := Fetch(apiUrl)
	if err != nil {
		Error.Printf("Error fetching %s: %v", apiUrl, err)
		return
	}
	
	//os.WriteFile("test.html", []byte(res), 0644)
	pages, err := ParseHTML(res)
	if err != nil {
		Error.Printf("Error parsing HTML: %v", err)
		return
	}
	for _, page := range pages {
		log.Printf("Processing page %s", page)
		err := ParseDocFull(page)
		if err != nil {
			Error.Printf("Error parsing doc: %v", err)
			return
		}
	}
}

func ParseDocFull(url string) error {
	pname := pageNameExtractor.FindStringSubmatch(url)
	if len(pname) != 2 {
		return fmt.Errorf("Failed to extract page name from %s", url)
	}

	res, err := Fetch(rootUrl + url)
	if err != nil {
		return fmt.Errorf("Error fetching %s: %v", rootUrl+url, err)
	}

	function, err := ParseDoc(res)
	if err != nil {
		return fmt.Errorf("Error parsing HTML for %s: %v", url, err)
	}
	function.Name = pname[1]
	err = function.WriteFile(outDir)
	if err != nil {
		return fmt.Errorf("Error writing file for %s: %v", url, err)
	}
	return nil
}