// ===== START FRESH =====
// This function is called when user clicks "Start Fresh" button
// msg.payload should contain the old session_id to deactivate

const oldSessionId = msg.payload;

if (!oldSessionId) {
    node.error("No session ID provided to deactivate");
    return [null, null];
}

// Deactivate old session in database
const deactivateMsg = {
    topic: `
        UPDATE session_state
        SET is_active = 0, updated_at = ${Date.now()}
        WHERE session_id = '${oldSessionId}';
    `,
    _mode: "deactivate-old-session"
};

// Clear all global context variables
global.set("currentSessionId", null);
global.set("productionStartTime", null);
global.set("operatingTime", 0);
global.set("trackingEnabled", false);
global.set("cycleCount", 0);
global.set("machineOnline", true);
global.set("productionStarted", false);
global.set("lastCycleTime", null);
global.set("activeWorkOrder", null);
flow.set("lastMachineState", 0);

node.warn("Starting fresh - all session data cleared");

msg._recoveryStatus = "fresh-start";
msg.payload = {
    success: true,
    type: "success",
    message: "Previous session discarded. System ready for new work orders."
};

return [deactivateMsg, msg];  // Output 1: DB update, Output 2: success message