package games

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"

	"github.com/google/go-querystring/query"
)

type GetGamesParams struct {
	// The ID of the category or game to get. Include this parameter for each category or game you want to get. For example, &id=1234&id=5678.
	// You may specify a maximum of 100 IDs. The endpoint ignores duplicate and invalid IDs or IDs that weren’t found.
	IDs []string `url:"id,omitempty"`

	// The name of the category or game to get. The name must exactly match the category’s or game’s title.
	// Include this parameter for each category or game you want to get. For example, &name=foo&name=bar.
	// You may specify a maximum of 100 names. The endpoint ignores duplicate names and names that weren’t found.
	Names []string `url:"name,omitempty"`

	// The IGDB ID of the game to get. Include this parameter for each game you want to get. For example, &igdb_id=1234&igdb_id=5678.
	// You may specify a maximum of 100 IDs. The endpoint ignores duplicate and invalid IDs or IDs that weren’t found.
	IGDBIDs []string `url:"igdb_id,omitempty"`
}

type GetGamesResponse struct {
	// The list of categories and games. The list is empty if the specified categories and games weren’t found.
	Data []Game `json:"data"`
}

// Gets information about specified categories or games.
//
// You may get up to 100 categories or games by specifying their ID or name. You may specify all IDs, all names, or a combination of IDs and names. If you specify a combination of IDs and names, the total number of IDs and names must not exceed 100.
//
// Requires an app access token or user access token.
func (c *Games) GetGames(ctx context.Context, params *GetGamesParams) (*GetGamesResponse, error) {
	v, _ := query.Values(params)
	endpoint := c.baseUrl.ResolveReference(&url.URL{Path: "games", RawQuery: v.Encode()})

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.String(), nil)
	if err != nil {
		return nil, err
	}

	res, err := c.client.Do(req)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	statusOK := res.StatusCode >= 200 && res.StatusCode < 300
	if !statusOK {
		return nil, fmt.Errorf("failed to get games (%d)", res.StatusCode)
	}

	var data GetGamesResponse
	if err := json.NewDecoder(res.Body).Decode(&data); err != nil {
		return nil, err
	}

	return &data, nil
}