require('sqlite3').verbose();

var fs = require('fs');
var tape = require('tape');
var MBTiles = require('..');
var fixtureDir = __dirname + '/fixtures/output';

// Recreate output directory to remove previous tests.
try { fs.unlinkSync(fixtureDir + '/write_1.mbtiles'); } catch(err) {}
try { fs.mkdirSync(fixtureDir, 0755); } catch(err) {}

tape('test mbtiles file creation', function(assert) {
    var completed = { written: 0, read: 0 };
    new MBTiles(fixtureDir + '/write_1.mbtiles', function(err, mbtiles) {
        completed.open = true;
        if (err) throw err;

        mbtiles.startWriting(function(err) {
            completed.started = true;
            if (err) throw err;

            fs.readdirSync(__dirname + '/fixtures/images/').forEach(insertTile);
        });

        function insertTile(file) {
            var coords = file.match(/^plain_1_(\d+)_(\d+)_(\d+).png$/);
            if (!coords) return;

            // Flip Y coordinate because file names are TMS, but .putTile() expects XYZ.
            coords[2] = Math.pow(2, coords[3]) - 1 - coords[2];

            var tile = fs.readFileSync(__dirname + '/fixtures/images/' + file);
            mbtiles.putTile(coords[3] | 0, coords[1] | 0, coords[2] | 0, tile, function(err) {
                if (err) throw err;
                completed.written++;
                if (completed.written === 285) {
                    mbtiles.stopWriting(function(err) {
                        completed.stopped = true;
                        if (err) throw err;
                        verifyWritten();
                    });
                }
            });
        }

        function verifyWritten() {
            fs.readdirSync(__dirname + '/fixtures/images/').forEach(function(file) {
                var coords = file.match(/^plain_1_(\d+)_(\d+)_(\d+).png$/);
                if (coords) {
                    // Flip Y coordinate because file names are TMS, but .getTile() expects XYZ.
                    coords[2] = Math.pow(2, coords[3]) - 1 - coords[2];
                    mbtiles.getTile(coords[3] | 0, coords[1] | 0, coords[2] | 0, function(err, tile) {
                        if (err) throw err;
                        assert.deepEqual(tile, fs.readFileSync(__dirname + '/fixtures/images/' + file));
                        completed.read++;
                        if (completed.read === 285) assert.end();
                    });
                }
            });
        }
    });
});