package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"git.fuyu.moe/Fuyu/router"
	"io/ioutil"
	"net/http"
	"strconv"
)

func main() {
	//fmt.Println("Hello world")
	r := router.New()
	r.GET(`/`, home)
	r.GET(`/compare/:user`, compare)
	r.Start(`:8070`)
}

type jikanAPIUserList struct {
	RequestHash        string          `json:"request_hash"`
	RequestCached      bool            `json:"request_cached"`
	RequestCacheExpiry int             `json:"request_cache_expiry"`
	Completed          int             `json:"completed"`
	Watching           int             `json:"watching"`
	Dropped            int             `json:"dropped"`
	PlanToWatch        int             `json:"plan_to_watch"`
	OnHold             int             `json:"on_hold"`
	Anime              []jikanAPIAnime `json:"anime"`
}

type jikanAPIAnime struct {
	MeikanID        int    `json:"meikan_id"`
	MyanimelistID   int    `json:"mal_id"`
	Title           string `json:"title"`
	ImageURL        string `json:"image_url"`
	Type            string `json:"type"`
	WatchingStatus  int    `json:"watching_status"`
	Score           int    `json:"score"`
	WatchedEpisodes int    `json:"watched_episodes"`
	TotalEpisodes   int    `json:"total_episodes"`
	AiringStatus	int    `json:"airing_status"`
}

type meikanListItem struct {
	Anime meikanAnime `json:"anime"`
	State string `json:"state"`
	Episode int `json:"episode"`
	Rating int `json:"rating"`
	Hidden bool `json:"hidden"`
	Recommended bool `json:"recommend"`
}

type meikanAnime struct {
	ID int `json:"id"`
	Title string `json:"title"`
	Type string `json:"type"`
	Episodes int `json:"episodes"`
	State string `json:"state"`
	Rating string `json:"rating"`
}

type meikanAPIIDs struct {
	MeikanID      int `json:"meikan"`
	MyanimelistID int `json:"myanimelist"`
	AnidbID       int `json:"anidb"`
}

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func home(c *router.Context) error {
	return c.String(200, "Test")
}

func compare(c *router.Context) error {
	user := c.Param(`user`)
	//https://api.jikan.moe/v3/user/nekomata1037/animelist/all
	//https://api.meikan.moe/v1/ids/anime
	jikanList := jikanAPIGetUserAnimelist(user)
	var anime []meikanListItem
	//fmt.Println(result)
	IDs := meikanAPIGetIDs()
	for i := 0; i < len(jikanList.Anime); i++ {
		//fmt.Println(result.Anime[i].Title)
		for d := 0; d < len(IDs); d++ {
			if jikanList.Anime[i].MyanimelistID == IDs[d].MyanimelistID {
				jikanList.Anime[i].MeikanID = IDs[d].MeikanID
			}
		}
		temp := meikanListItem{Anime: meikanAnime{ID: jikanList.Anime[i].MeikanID,
			Title: jikanList.Anime[i].Title,
			Type: jikanList.Anime[i].Type,
			Episodes: jikanList.Anime[i].TotalEpisodes},
			Episode: jikanList.Anime[i].WatchedEpisodes,
			Rating: jikanList.Anime[i].Score}
		switch jikanList.Anime[i].WatchingStatus {
		case 1:
			jikanList.Completed++
			temp.State = "Watching"
		case 2:
			jikanList.Completed++
			temp.State = "Finished"
		case 3:
			jikanList.OnHold++
			temp.State = "On Hold"
		case 4:
			jikanList.Dropped++
			temp.State = "Dropped"
		case 6:
			jikanList.PlanToWatch++
			temp.State = "Plan to watch"
		}
		switch jikanList.Anime[i].AiringStatus {
		case 2:
			temp.Anime.State = "Finished"
		}
		anime = append(anime, temp)
	}
	//fmt.Println(anime)
	//resJSON, err := json.MarshalIndent(result, "", "\t")
	//check(err)
	//jsonfile := []byte(resJSON)
	return c.JSON(200, jikanList)
}

func jikanAPIGetUserAnimelist(user string) jikanAPIUserList {
	var result jikanAPIUserList
	for i := 1; ; i++ {
		resp, err := http.Get("https://api.jikan.moe/v3/user/" + user + "/animelist/all/" + strconv.Itoa(i))
		check(err)
		defer resp.Body.Close()
		var tempResult jikanAPIUserList
		body, err := ioutil.ReadAll(resp.Body)
		check(err)
		if i == 1 {
			_ = json.NewDecoder(bytes.NewReader(body)).Decode(&result)
			fmt.Println("Searching page 1")
			continue
		} else {
			_ = json.NewDecoder(bytes.NewReader(body)).Decode(&tempResult)
			result.Anime = append(result.Anime, tempResult.Anime...)
			fmt.Println("Searching page " + strconv.Itoa(i))
		}
		if len(tempResult.Anime) == 0 {
			break
		}
	}
	return result
}

func meikanAPIGetIDs() []meikanAPIIDs {
	resp, err := http.Get("https://api.meikan.moe/v1/ids/anime")
	check(err)
	defer resp.Body.Close()
	var result []meikanAPIIDs
	body, err := ioutil.ReadAll(resp.Body)
	check(err)
	_ = json.NewDecoder(bytes.NewReader(body)).Decode(&result)
	return result
}