package common

import (
	"fmt"
	"log/slog"
	"os"
	"strings"
)

func thread(l *slog.Logger, dests <-chan string, tab chan<- interface{}) {
	c := MkClient()
	for dest := range dests {
	uriloop:
		for _, uri := range Paths {
			url := fmt.Sprintf("https://%s%s", dest, uri)
			fallback, redirect := true, true
			for {
				if doc, redir, err := Hit(c, url); err == nil {
					if doc != nil {
						if Checktitle(doc) {
							entries := Entries(doc)
							l.Info("opendir", "url", url, "entries", entries)
						}
					} else if redir != "" && redirect {
						url = redir
						if !strings.HasPrefix(url, "https") {
							fallback = false
						}
						redirect = false
						continue
					}
					break
				} else {
					if !fallback {
						break uriloop
					}
					url = "http://" + url[8:]
					fallback = false
				}
			}
		}
	}
	tab <- "H A C K   T H E   P L A N E T"
}

func Takeoff() {
	dests := make(chan string)
	tab := make(chan interface{})
	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))

	for i := 0; i < Conf.Threads; i++ {
		go thread(logger, dests, tab)
	}

	if Conf.List != "" {
		Readfile(Conf.List, dests)
	} else if Conf.Cidr != "" {
		if !ValidRange(Conf.Cidr) {
			Fatal("invalid cidr range")
		}
		LCG(Conf.Cidr, dests)
	} else {
		Fatal("provide either a list (-l) or cidr range (-r)")
	}
	close(dests)

	for x := 0; x < Conf.Threads; x++ {
		<-tab
	}
	close(tab)
}