package runner

import (
	_ "embed"
	"encoding/json"
	"fmt"
	"time"
)

//go:embed js/facebook_data.js
var facebook_data string

const (
	facebook_login_url = "https://m.facebook.com/login/?ref=dbl&fl"
)

type FacebookRes struct {
	Followers int            `json:"followers"`
	Posts     []FacebookPost `json:"posts"`
}

type FacebookPost struct {
	Engagement int       `json:"engagement"`
	Body       string    `json:"body"`
	Timestamp  time.Time `json:"timestamp"`
	URL        string    `json:"url"`
}

func (r *Runner) CheckFacebook() {
	r.page.MustNavigate(facebook_login_url)
	r.page.WaitLoad()
	time.Sleep(time.Millisecond * 113)
	location := r.page.MustEval("window.location.href").Str()
	if location == facebook_login_url {
		r.page.MustElement(`input[name="email"]`).Input(r.FacebookEmail)
		time.Sleep(time.Millisecond * 113)
		r.page.MustElement(`input[name="pass"]`).Input(r.FacebookPass)
		time.Sleep(time.Millisecond * 72)
		r.page.MustElement(`button[name="login"]`).MustClick()
		time.Sleep(time.Millisecond * 5000)
	}
}

func (r *Runner) GetFacebookData() []Result {
	var results []Result
	for i := range r.Targets {
		fmt.Println("Processing " + r.Targets[i].Name + "'s Facebook")
		results = append(results, r.GetFacebookDataByIndex(i))
	}
	return results
}

//Navigate with random stops
func (r *Runner) FacebookPageNavigate(index int) {
	r.page.MustNavigate(r.Targets[index].Facebook)
	r.page.MustWaitLoad()
	r.Scroll(30, longTimeOut)
}

func (r *Runner) FacebookPagePullData() FacebookRes {
	data := r.page.MustEval(facebook_data).JSON("", "")
	var res FacebookRes
	err := json.Unmarshal([]byte(data), &res)
	checkErr(err)
	return res
}

func (r *Runner) calcFacebookPostData(posts []FacebookPost) (int, int) {
	total_engagement := 0
	total_posts := 0
	for _, elm := range posts {
		if elm.Timestamp.After(r.weekago) && elm.Timestamp.Before(r.currentTime) {
			total_engagement += elm.Engagement
			total_posts += 1
		}
	}

	return total_engagement, total_posts
}

func (r *Runner) GetFacebookDataByIndex(index int) Result {

	r.FacebookPageNavigate(index)

	data := r.FacebookPagePullData()

	total_engagement, total_posts := r.calcFacebookPostData(data.Posts)

	r.logger.LogFacebookRes(data, r.Targets[index].Name)

	result := Result{
		r.Targets[index].Name,
		"Facebook",
		data.Followers,
		total_engagement,
		total_posts,
	}

	r.logger.LogResult(result, "Facebook")

	return result
}