package main

import (
	"context"
	"log"

	"github.com/chromedp/cdproto/cdp"
	"github.com/chromedp/chromedp"
	"github.com/jobs-scraper/internal/pkg/domain"
	"github.com/jobs-scraper/services/scraper-google/utils"
)

func Work(mainCtx context.Context) func(page int, stream chan<- domain.GoogleLink) {

	return func(page int, stream chan<- domain.GoogleLink) {
		query := "site:boards.greenhouse.io (Software OR Backend OR Full-Stack) Engineer"

		opts := append(chromedp.DefaultExecAllocatorOptions[:],
			chromedp.Flag("headless", false),
			chromedp.Flag("disable-blink-features", "AutomationControlled"),
			chromedp.Flag("excludeSwitches", "enable-automation"),
			chromedp.Flag("disable-web-security", false),
			chromedp.UserAgent("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"),
			chromedp.WindowSize(1920, 1080),
		)
		allocCtx, cancel := chromedp.NewExecAllocator(mainCtx, opts...)
		defer cancel()

		ctx, cancel := chromedp.NewContext(allocCtx)
		defer cancel()

		var nodes []*cdp.Node

		// start = 0, start = 10, start = 20 and so on for offset pagination
		err := chromedp.Run(ctx,
			chromedp.Navigate(utils.BuildUrl(query, page)),
		)

		if err != nil {
			log.Fatal(err)
		}

		err = chromedp.Run(ctx,
			chromedp.WaitVisible("#search", chromedp.ByID),
		)

		if err != nil {
			log.Fatal(err)
		}

		err = chromedp.Run(ctx,
			chromedp.Nodes("[data-snc]", &nodes, chromedp.ByQueryAll),
		)

		if err != nil {
			log.Fatal(err)
		}

		for i, node := range nodes {
			result := domain.GoogleLink{}

			err = chromedp.Run(ctx,
				chromedp.Text("h3", &result.Title, chromedp.ByQuery, chromedp.FromNode(node)),
			)

			if err != nil {
				log.Printf("Failed to get title for node %d: %v", i, err)
			}

			err = chromedp.Run(ctx,
				chromedp.AttributeValue("a", "href", &result.Link, nil, chromedp.ByQuery, chromedp.FromNode(node)),
			)

			if err != nil {
				log.Printf("Failed to get link for node %d: %v", i, err)
			}

			result.ID, err = utils.ExtractJobId(result.Link)

			if err != nil {
				log.Printf("Failed to extract job ID for node %d: %v (link: %s)", i, err, result.Link)
				continue
			}

			result.CompanyName, err = utils.ExtractCompanyName(result.Link)

			if err != nil {
				log.Printf("Failed to extract company name for node %d: %v (link: %s)", i, err, result.Link)
				continue
			}

			err = chromedp.Run(ctx,
				chromedp.Text("div.VwiC3b", &result.Description, chromedp.ByQuery, chromedp.FromNode(node)),
			)

			if err != nil {
				log.Printf("Failed to get description for node %d: %v", i, err)
			}

			stream <- result
		}
	}

}