import sqlite3 from 'sqlite3';

const db = new sqlite3.Database(':memory:');

db.serialize(() => {
    db.run("CREATE TABLE devices (mac TEXT PRIMARY KEY, model TEXT, connected INTEGER, last_seen TEXT)");
});

const upsertSql = `
    INSERT INTO devices (mac, model, connected, last_seen) 
    VALUES (?, ?, ?, ?)
    ON CONFLICT(mac) DO UPDATE SET
        model = excluded.model,
        connected = COALESCE(excluded.connected, devices.connected),
        last_seen = excluded.last_seen
`;

console.log("Starting sequential tests...");

// Test 1: Insert initial online device
db.run(upsertSql, ['AA:BB:CC', 'T110', 1, '2023-01-01T12:00:00Z'], (err) => {
    if (err) console.error(err);
    checkDevice('Test 1 (Init Online)', 'AA:BB:CC', 1, () => {

        // Test 2: Update with NULL status
        db.run(upsertSql, ['AA:BB:CC', 'T110', null, '2023-01-01T12:05:00Z'], (err) => {
            if (err) console.error(err);
            checkDevice('Test 2 (Sensor Event/Null)', 'AA:BB:CC', 1, () => {

                // Test 3: Update with offline status
                db.run(upsertSql, ['AA:BB:CC', 'T110', 0, '2023-01-01T12:10:00Z'], (err) => {
                    if (err) console.error(err);
                    checkDevice('Test 3 (Offline/0)', 'AA:BB:CC', 0, () => {

                        // Test 4: Update with NULL status while offline
                        db.run(upsertSql, ['AA:BB:CC', 'T110', null, '2023-01-01T12:15:00Z'], (err) => {
                            if (err) console.error(err);
                            checkDevice('Test 4 (Sensor Event while Offline)', 'AA:BB:CC', 0, () => {

                                // Test 5: Back online
                                db.run(upsertSql, ['AA:BB:CC', 'T110', 1, '2023-01-01T12:20:00Z'], (err) => {
                                    if (err) console.error(err);
                                    checkDevice('Test 5 (Online again)', 'AA:BB:CC', 1, () => {
                                        console.log("All tests completed.");
                                    });
                                });
                            });
                        });
                    });
                });
            });
        });
    });
});

function checkDevice(testName, mac, expectedConnected, callback) {
    db.get("SELECT * FROM devices WHERE mac = ?", [mac], (err, row) => {
        if (err) console.error("DB Error:", err);
        const status = row.connected === expectedConnected ? 'PASS' : 'FAIL';
        console.log(`${testName}: connected=${row.connected} (Expected: ${expectedConnected}) -> ${status}`);
        if (callback) callback();
    });
}