package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"strconv"
	"time"

	"github.com/gookit/color"
	"github.com/valyala/fasthttp"
)

func GetUserAnimeListData(username, status string) (*AnimeListMal, []byte, error) {
	var list AnimeListMal
	body, err := GetUserAnimeListBytes(username, status)
	if err != nil {
		return nil, body, err
	}
	err = json.Unmarshal(body, &list)
	return &list, body, err
}

func GetUserAnimeListBytes(username, status string) ([]byte, error) {
	return GetDataMal(userApiMal + username + "/animelist?limit=1000&status=" + status)
}

func GetUserData(username string) (*UserJikan, []byte, error) {
	var user UserJikan
	body, err := GetUserBytesCached(username)
	if err != nil {
		return nil, body, err
	}
	err = json.Unmarshal(body, &user)
	return &user, body, err
}

func GetUserBytesCached(username string) ([]byte, error) {
	key := userApiJikan + username
	data, err := cache.Get(key)
	if err != nil {
		data, err = GetDataJikan(key)
		if err != nil {
			return data, err
		}
		cache.Set(key, data)
		return data, err
	}
	return data, err
}

func GetSeasonDataAll() (*SeasonJikan, []byte, error) {
	color.Infoln("Aktuelle Season abfragen...")
	data, bytes, err := GetSeasonData(1)
	if err != nil {
		return data, bytes, err
	}
	color.Infof("%d Anime auf %d Seiten\n", data.Pagination.Items.Total, data.Pagination.LastVisiblePage)
	for i := 2; data.Pagination.HasNextPage; i++ {
		color.Infof("Seite %d abfragen...\n", i)
		time.Sleep(time.Second)
		newData, _, err := GetSeasonData(i)
		if err != nil {
			return data, nil, err
		}
		data.Pagination.CurrentPage = newData.Pagination.CurrentPage
		data.Pagination.HasNextPage = newData.Pagination.HasNextPage
		data.Data = append(data.Data, newData.Data...)
		data.Pagination.Items.Count += newData.Pagination.Items.Count
	}
	color.Infof("%d Anime bekommen\n", len(data.Data))
	bytes, err = json.Marshal(data)
	return data, bytes, err
}

func GetSeasonData(page int) (*SeasonJikan, []byte, error) {
	var data SeasonJikan
	body, err := GetSeasonBytes(page)
	if err != nil {
		return nil, body, err
	}
	err = json.Unmarshal(body, &data)
	return &data, body, err
}

func GetSeasonBytes(page int) ([]byte, error) {
	if page != 0 {
		return GetDataJikan(seasonApiJikan + "?page=" + strconv.Itoa(page))
	}
	return GetDataJikan(seasonApiJikan)
}

func GetDataMal(apiAddr string) ([]byte, error) {
	var body []byte
	req := fasthttp.AcquireRequest()
	resp := fasthttp.AcquireResponse()
	defer fasthttp.ReleaseRequest(req)
	defer fasthttp.ReleaseResponse(resp)

	req.SetRequestURI(*malApiBaseUri + apiAddr)
	req.Header.SetMethod(fasthttp.MethodGet)
	req.Header.Add("X-MAL-CLIENT-ID", *malApiId)
	err := fasthttp.Do(req, resp)
	contentEncoding := resp.Header.Peek(fasthttp.HeaderContentEncoding)
	if bytes.EqualFold(contentEncoding, []byte("gzip")) {
		body, _ = resp.BodyGunzip()
	} else {
		body = resp.Body()
	}

	if resp.StatusCode() != fasthttp.StatusOK {
		return body, fmt.Errorf("unexpected response code: %s %d", *malApiBaseUri+apiAddr, resp.StatusCode())
	}
	return body, err
}

func GetDataJikan(apiAddr string) ([]byte, error) {
	var body []byte
	statusCode, body, err := fasthttp.Get(body, *jikanApiBaseUri+apiAddr)
	if statusCode != fasthttp.StatusOK {
		return body, fmt.Errorf("unexpected response code: %s %d", *jikanApiBaseUri+apiAddr, statusCode)
	}
	return body, err
}

func GetCurrentSeasonString() string {
	var now = time.Now()
	switch now.Month() {
	case time.January, time.February, time.March:
		return fmt.Sprintf("%04d/winter", now.Year())
	case time.April, time.May, time.June:
		return fmt.Sprintf("%04d/spring", now.Year())
	case time.July, time.August, time.September:
		return fmt.Sprintf("%04d/summer", now.Year())
	case time.October, time.November, time.December:
		return fmt.Sprintf("%04d/fall", now.Year())
	default:
		return fmt.Sprintf("%04d", now.Year())
	}
}