package tiles

import (
	"time"

	"git.coopgo.io/coopgo-platform/carpool-service/storage"
	"github.com/paulmach/orb"
	"github.com/spf13/viper"
)

type TilesHandler struct {
	Config            *viper.Viper
	PersistentStorage storage.Storage

	CachedTileset map[string]Tileset
}

func NewTilesHandler(cfg *viper.Viper, persistantStorage storage.Storage) (*TilesHandler, error) {
	return &TilesHandler{
		Config:            cfg,
		PersistentStorage: persistantStorage,
	}, nil
}

// GetTiles retrieves tiles
func (h *TilesHandler) GetTiles(driverOrPassenger string, date time.Time, points ...orb.Point) (*Tileset, error) {
	dateString := date.Format("2006-01-02")

	result := Tileset{}

	grid_ids := []GridId{}

	nb_points := len(points)

	if nb_points > 1 {
		grid_ids = LineStringGridIds(orb.LineString(points))
	} else if nb_points == 1 {
		grid_ids = []GridId{PointGridId(points[0])}
	}

	for _, gid := range grid_ids {
		tile, err := h.GetTile(driverOrPassenger, date, gid)
		if err != nil {
			return nil, err
		}
		result[dateString] = tile
	}

	return &result, nil
}