let db = require("../config/db.js");
let mathFunc = require("./mathFunc.js");
let util = require("util");

module.exports = {
    getPolygons : function (req, res) {
        mathFunc.calculateArea([]);
        if (req.query.gameID != null) {
            let query = "CALL getPolygonPoints(\"" + req.query.gameID + "\");";
            db.get().query(query, function(err, rows){
                if (err) {
                    console.log(err);
                    return res.send(400);
                }
                // console.log(rows);
                let polygons = []
                let polygonDict = {};
                rows[0].map((point) => {
                    if (!(point.polygonID in polygonDict)) {
                        polygonDict[point.polygonID] = {};
                        polygonDict[point.polygonID].coords = [];
                        polygonDict[point.polygonID].gameID = point.gameID;
                        polygonDict[point.polygonID].userID = point.userID;
                        polygonDict[point.polygonID].colour = point.colour;
                        polygonDict[point.polygonID].polygonID = point.polygonID;
                    }
                    polygonDict[point.polygonID].coords.push({lat: point.lat, lng: point.lng});
                });
                for (let [polygon, polygonData] of Object.entries(polygonDict)){
                    polygons.push(polygonDict[polygon]);
                }
                res.send(polygons);
                return;
            });
        } else {
            res.send(500);
        }
    },
    isPolygon: function (req, res) {
        if (req.body.gameID != null && req.body.userID != null && req.body.points != null) {
            let gameID = req.body.gameID;
            let userID = req.body.userID;
            let points = JSON.parse(req.body.points);
            if (points.length < 2) {
                res.send([]);
            } else {
                let firstPoint = points[0];
                let lastPoint = points[points.length - 1];
                let distance = mathFunc.gpsToMeters(firstPoint.lat, firstPoint.lng, lastPoint.lat, lastPoint.lng);
                console.log(distance);
                if (distance < 10) {
                    //area is just 1 for now we fix later.
                    query = util.format("CALL insertPolygon(\"%s\", \"%s\", 1)", gameID, userID);
                    db.get().query(query, function(err, rows) {
                        if (err) {
                            console.log(err);
                            return res.send(400);
                        }

                        let polygonID = rows[0][0].polygonID;
                        query = "INSERT INTO polygonPoints (polygonID, lat, lng) VALUES ";
                        let delimiterNecessary = false;

                        points.map((point) => {
                            if (delimiterNecessary) {
                                query += ",";
                            }
                            query += util.format("(\"%s\",%s,%s)", polygonID, point.lat, point.lng);
                            delimiterNecessary = true;
                        });
                        query += ";";

                        db.get().query(query, function(err, pointRows) {
                            if (err) {
                                console.log(err);
                                return res.send(400);
                            }
                            res.send(rows[0][0]);
                            return;
                        });
                    });
                } else {
                    res.send([]);
                }
            }

        }
    }
}