const { getForecast, getSeaConditions } = require("../api_models/openmeteo.js");

/**
 * Registers forecast-related routes.
 * @param {Object} router - Route wrapper with get/post methods
 * @param {Object} app - SignalK app instance
 */
function registerForecastRoutes(router, app) {
    // Get current forecast data directly from OpenMeteo
    router.get("/forecasts/data", async (req, res) => {
        try {
            const position = app.getSelfPath('navigation.position')?.value;

            if (!position?.latitude || !position?.longitude) {
                return res.status(503).json({ error: "Position not available" });
            }

            const mode = req.query.mode || 'both';
            const [forecastData, wavesData] = await Promise.all([
                getForecast(position, { mode }),
                getSeaConditions(position, { mode })
            ]);

            res.status(200).json({
                forecast: forecastData,
                sea: wavesData
            });
        } catch (error) {
            console.error('[MEB] Error in /meb/forecasts/data:', error);
            res.status(500).json({ error: error.message });
        }
    });

    // Force update: fetch fresh hourly data from OpenMeteo
    router.post("/forecasts/update", async (req, res) => {
        try {
            const position = app.getSelfPath('navigation.position')?.value;

            if (!position?.latitude || !position?.longitude) {
                return res.status(503).json({ error: "Position not available" });
            }

            const [forecastData, wavesData] = await Promise.all([
                getForecast(position, { mode: 'both' }),
                getSeaConditions(position, { mode: 'both' })
            ]);

            if (!forecastData?.hourly || !wavesData?.hourly) {
                return res.status(500).json({ error: "Hourly data not available from API" });
            }

            res.status(200).json({
                forecast: forecastData,
                sea: wavesData
            });
        } catch (error) {
            console.error('[MEB] Error in /meb/forecasts/update:', error);
            res.status(500).json({ error: error.message });
        }
    });
}

module.exports = registerForecastRoutes;