// Copyright 2023 The Sunlight Authors

// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.

// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

package sunlight

import "golang.org/x/mod/sumdb/tlog"

type TileReader struct {
	Fetch        func(key string) ([]byte, error)
	SaveTilesInt func(tiles []tlog.Tile, data [][]byte)
}

func (r *TileReader) Height() int {
	return TileHeight
}

func (r *TileReader) ReadTiles(tiles []tlog.Tile) (data [][]byte, err error) {
	for _, t := range tiles {
		b, err := r.Fetch(Path(t))
		if err != nil {
			return nil, err
		}
		data = append(data, b)
	}
	return data, nil
}

func (r *TileReader) SaveTiles(tiles []tlog.Tile, data [][]byte) { r.SaveTilesInt(tiles, data) }
