package handler

import (
	"github.com/gin-gonic/gin"
	"net/http"
	"pcgamedb/crawler"
	"pcgamedb/db"
	"pcgamedb/model"
)

type GetPopularGamesResponse struct {
	Status  string            `json:"status"`
	Message string            `json:"message,omitempty"`
	Games   []*model.GameInfo `json:"games"`
}

// GetPopularGameInfosHandler Get popular games
// @Summary Get popular games
// @Description Get popular games based on a specified type
// @Tags popular
// @Accept json
// @Produce json
// @Param type path string true "Type(igdb-most-visited, igdb-most-wanted-to-play, igdb-most-playing, igdb-most-played, steam-top, steam-week-top, steam-best-of-the-year, steam-most-played)"
// @Success 200 {object} GetPopularGamesResponse
// @Failure 400 {object} GetPopularGamesResponse
// @Failure 500 {object} GetPopularGamesResponse
// @Router /popular/{type} [get]
func GetPopularGameInfosHandler(c *gin.Context) {
	rankingType, exist := c.Params.Get("type")
	if !exist {
		c.JSON(http.StatusBadRequest, GetPopularGamesResponse{
			Status:  "error",
			Message: "Missing ranking type",
		})
	}
	popularityType := 0
	var steam250Func func() ([]*model.GameInfo, error) = nil
	switch rankingType {
	case "igdb-most-visited":
		popularityType = 1
	case "igdb-most-wanted-to-play":
		popularityType = 2
	case "igdb-most-playing":
		popularityType = 3
	case "igdb-most-played":
		popularityType = 4
	case "steam-top":
		steam250Func = crawler.GetSteam250Top250
	case "steam-week-top":
		steam250Func = crawler.GetSteam250WeekTop50
	case "steam-best-of-the-year":
		steam250Func = crawler.GetSteam250BestOfTheYear
	case "steam-most-played":
		steam250Func = crawler.GetSteam250MostPlayed
	default:
		c.JSON(http.StatusBadRequest, GetPopularGamesResponse{
			Status:  "error",
			Message: "Invalid ranking type",
		})
	}
	var infos []*model.GameInfo
	var err error
	if steam250Func != nil {
		infos, err = steam250Func()
		if err != nil {
			c.JSON(http.StatusInternalServerError, GetPopularGamesResponse{
				Status:  "error",
				Message: err.Error(),
			})
		}
		if len(infos) > 10 {
			infos = infos[:10]
		}
	} else {
		offset := 0
		for len(infos) < 10 {
			ids, err := crawler.GetIGDBPopularGameIDs(popularityType, offset, 20)
			if err != nil {
				c.JSON(http.StatusInternalServerError, GetPopularGamesResponse{
					Status:  "error",
					Message: err.Error(),
				})
			}
			offset += 20
			pids := make([]int, 20)
			for _, id := range ids {
				pid, err := crawler.GetIGDBAppParentCache(id)
				if err != nil {
					continue
				}
				pids = append(pids, pid)
			}
			newInfos, err := db.GetGameInfosByPlatformIDs("igdb", pids)
			if err != nil {
				c.JSON(http.StatusInternalServerError, GetPopularGamesResponse{
					Status:  "error",
					Message: err.Error(),
				})
			}
			infos = append(infos, newInfos...)
		}
		if len(infos) > 10 {
			infos = infos[:10]
		}
	}
	c.JSON(http.StatusOK, GetPopularGamesResponse{
		Status: "ok",
		Games:  infos,
	})
}