package crawler

import (
	"encoding/json"
	"errors"
	"fmt"
	"net/url"
	"regexp"
	"strconv"
	"strings"
	"time"

	"pcgamedb/cache"
	"pcgamedb/config"
	"pcgamedb/constant"
	"pcgamedb/model"
	"pcgamedb/utils"
)

func GetSteamAppDetail(id int) (*model.SteamAppDetail, error) {
	baseURL, _ := url.Parse(constant.SteamAppDetailURL)
	params := url.Values{}
	params.Add("appids", strconv.Itoa(id))
	// params.Add("l", "schinese")
	baseURL.RawQuery = params.Encode()
	resp, err := utils.Fetch(utils.FetchConfig{
		Url: baseURL.String(),
		Headers: map[string]string{
			"User-Agent": "",
		},
	})
	if err != nil {
		return nil, err
	}
	var detail map[string]*model.SteamAppDetail
	if err = json.Unmarshal(resp.Data, &detail); err != nil {
		return nil, err
	}
	if _, ok := detail[strconv.Itoa(id)]; !ok {
		return nil, fmt.Errorf("steam App not found: %d", id)
	}
	if detail[strconv.Itoa(id)] == nil {
		return nil, fmt.Errorf("steam App not found: %d", id)
	}
	return detail[strconv.Itoa(id)], nil
}

func GetSteamAppDetailCache(id int) (*model.SteamAppDetail, error) {
	if config.Config.RedisAvaliable {
		key := fmt.Sprintf("steam_game:%d", id)
		val, exist := cache.Get(key)
		if exist {
			var detail model.SteamAppDetail
			if err := json.Unmarshal([]byte(val), &detail); err != nil {
				return nil, err
			}
			return &detail, nil
		} else {
			data, err := GetSteamAppDetail(id)
			if err != nil {
				return nil, err
			}
			dataBytes, err := json.Marshal(data)
			if err != nil {
				return nil, err
			}
			_ = cache.Add(key, dataBytes)
			return data, nil
		}
	} else {
		return GetSteamAppDetail(id)
	}
}

func GenerateSteamGameInfo(id int) (*model.GameInfo, error) {
	item := &model.GameInfo{}
	detail, err := GetSteamAppDetailCache(id)
	if err != nil {
		return nil, err
	}
	item.SteamID = id
	item.Name = detail.Data.Name
	item.Description = detail.Data.ShortDescription
	item.Cover = fmt.Sprintf("https://shared.cloudflare.steamstatic.com/store_item_assets/steam/apps/%v/library_600x900_2x.jpg", id)
	item.Developers = detail.Data.Developers
	item.Publishers = detail.Data.Publishers
	item.InfoUpdatedAt = time.Now()
	var screenshots []string
	for _, screenshot := range detail.Data.Screenshots {
		screenshots = append(screenshots, screenshot.PathFull)
	}
	item.Screenshots = screenshots
	return item, nil
}

func GetSteamIDByIGDBID(IGDBID int) (int, error) {
	var err error
	resp, err := igdbFetch(constant.IGDBWebsitesURL, fmt.Sprintf(`where game = %v; fields *; limit 500;`, IGDBID))
	if err != nil {
		return 0, err
	}
	var data []struct {
		Game int    `json:"game"`
		Url  string `json:"url"`
	}
	if err = json.Unmarshal(resp.Data, &data); err != nil {
		return 0, err
	}
	if len(data) == 0 {
		return 0, errors.New("not found")
	}
	for _, v := range data {
		if strings.HasPrefix(v.Url, "https://store.steampowered.com/app/") {
			regex := regexp.MustCompile(`https://store.steampowered.com/app/(\d+)/?`)
			idStr := regex.FindStringSubmatch(v.Url)
			if len(idStr) < 2 {
				return 0, errors.New("failed parse")
			}
			steamID, err := strconv.Atoi(idStr[1])
			if err != nil {
				return 0, err
			}
			return steamID, nil
		}
	}
	return 0, errors.New("not found")
}

func GetSteamIDByIGDBIDCache(IGDBID int) (int, error) {
	if config.Config.RedisAvaliable {
		key := fmt.Sprintf("steam_game:%d", IGDBID)
		val, exist := cache.Get(key)
		if exist {
			id, err := strconv.Atoi(val)
			if err != nil {
				return 0, err
			}
			return id, nil
		} else {
			id, err := GetSteamIDByIGDBID(IGDBID)
			if err != nil {
				return 0, err
			}
			dataBytes := strconv.Itoa(id)
			_ = cache.Add(key, dataBytes)
			return id, nil
		}
	} else {
		return GetSteamIDByIGDBID(IGDBID)
	}
}