package auction

import (
	"encoding/json"
	"local/sandbox/selenium/copart/copart/browser"
	"local/sandbox/selenium/copart/copart/config"
	"log"
	"time"

	"github.com/tebeka/selenium"
)

type Auction struct {
	browser *browser.Browser
	cars    []*Car
	stop    bool
	stopped bool
}

func New(url string) (*Auction, error) {
	b, err := browser.New()
	if err != nil {
		b.Close()
		return nil, err
	}
	if err := b.Get(url); err != nil {
		b.Close()
		return nil, err
	}

	var elems []selenium.WebElement
	deadline := time.Now().Add(time.Second * 10) // TODO ctx configurable and load more later
	for deadline.After(time.Now()) {
		time.Sleep(time.Second)
		elems, err = b.Driver.FindElements("xpath", "//iframe")
		if err != nil {
			b.Close()
			return nil, err
		}
		if len(elems) > 0 {
			break
		}
	}
	if time.Now().After(deadline) {
		b.Close()
		return nil, b.Close()
	}
	url, err = elems[0].GetAttribute("src")
	if err != nil {
		b.Close()
		return nil, err
	}
	if err := b.Get(url); err != nil {
		b.Close()
		return nil, err
	}

	return &Auction{
		browser: b,
		cars:    []*Car{},
	}, nil
}

func (a *Auction) Start() error {
	log.Println("START", a.stop)
	go func() {
		defer func() {
			a.stopped = true
		}()
		for !a.stop {
			log.Println("TOP")
			c := NewCar()
			if err := c.Parse(a.browser.Driver); err != nil {
				log.Println(err)
				return
			}
			log.Println("C", c)
			for !a.stop {
				time.Sleep(time.Second)
				d := NewCar()
				if err := d.Parse(a.browser.Driver); err != nil {
					log.Println(err)
					return
				}
				log.Printf("%v = (%v == %v)", c.Equals(d), c.String(), d.String())
				if !c.Equals(d) {
					break
				}
				c = d
			}
			b, err := c.Encode()
			if err != nil {
				log.Println(err)
				return
			}
			if err := config.Values().DB.Set(c.String(), b); err != nil {
				log.Println(err)
				return
			}
			var list []string
			if b, err := config.Values().DB.Get("LIST"); err != nil {
				log.Println(err)
				return
			} else if err := json.Unmarshal(b, &list); err != nil {
				log.Println(err)
				return
			} else {
				list = append(list, c.String())
				b, _ := json.Marshal(list)
				if err := config.Values().DB.Set("LIST", b); err != nil {
					log.Println(err)
					return
				}
			}
		}
	}()
	return nil
}

func (a *Auction) Stop() error {
	if a == nil {
		return nil
	}
	a.stop = true
	for !a.stopped {
		time.Sleep(time.Second)
	}
	if a.browser == nil || a.browser.Driver == nil {
		return nil
	}
	return a.browser.Driver.Close()
}