'use strict';

(function () {
    var Game = {
        NUMBER_OF_ROUNDS: 5,
        MAX_SCORE: 1000,

        mapBounds: null,
        multi: { token: null, owner: false },
        rounds: [],
        scoreSum: 0,
        panoId: null,
        pov: null,
        panorama: null,
        map: null,
        guessMarker: null,
        adaptGuess: false,
        googleLink: null,

        MultiConnector: {
            connection: null,
            reconnectCounter: 0,

            connect: function () {
                if (Game.MultiConnector.connection && Game.MultiConnector.connection.readyState !== WebSocket.CLOSED) {
                    return;
                }

                Game.MultiConnector.connection = new WebSocket((MapGuesser.isSecure ? 'wss' : 'ws') + '://' + multiUrl);

                Game.MultiConnector.connection.onopen = function () {
                    document.getElementById('loading').style.visibility = 'hidden';

                    Game.MultiConnector.reconnectCounter = 0;

                    Game.MultiConnector.connection.send(JSON.stringify({ func: 'connect_to_room', args: { roomId: roomId, token: Game.multi.token } }));
                };

                Game.MultiConnector.connection.onclose = Game.MultiConnector.noConnection;

                Game.MultiConnector.connection.onerror = function (event) {
                    console.error('WebSocket error in Game.MultiConnector:', event);
                };

                Game.MultiConnector.connection.onmessage = function (message) {
                    var json;

                    try {
                        json = JSON.parse(message.data);
                    } catch (e) {
                        console.error('Cannot parse message!');
                        console.error(message.data);
                        return;
                    }

                    switch (json.type) {
                        case 'initialize':
                            Game.MultiConnector.initialize(json.data);
                            break;

                        case 'member_joined':
                            Game.MultiConnector.memberJoined(json.data);
                            break;

                        case 'new_round':
                            Game.MultiConnector.newRound(json.data);
                            break;

                        case 'results':
                            //TODO
                            break;

                        case 'guess':
                            //TODO
                            break;
                    }
                };
            },

            noConnection: function () {
                if (Game.MultiConnector.reconnectCounter === 2) {
                    console.error('Could not reconnect WebSocket for Game.MultiConnector...')
                }

                setTimeout(function () {
                    Game.MultiConnector.reconnectCounter++;

                    console.log('Reconnecting WebSocket for Game.MultiConnector... ' + Game.MultiConnector.reconnectCounter);
                    Game.MultiConnector.connect();
                }, 1000 + Math.min(Game.MultiConnector.reconnectCounter * 500, 9000));
            },

            initialize: function (data) {
                if (data.history) {
                    for (var i = 0; i < data.history.length; ++i) {
                        var round = data.history[i];
                        Game.rounds.push({ position: round.position, guessPosition: round.guessPosition, realMarker: null, guessMarker: null, line: null });
                        Game.addRealGuessPair(round.position, round.guessPosition, true);
                        Game.scoreSum += round.score;
                    }

                    document.getElementById('currentRound').innerHTML = String(Game.rounds.length) + '/' + String(Game.NUMBER_OF_ROUNDS);
                    document.getElementById('currentScoreSum').innerHTML = String(Game.scoreSum) + '/' + String(Game.rounds.length * Game.MAX_SCORE);
                }

                if (data.place) {
                    Game.panoId = data.place.panoId;
                    Game.pov = data.place.pov;

                    document.getElementById('panoCover').style.visibility = 'hidden';
                    MapGuesser.hideModal();

                    Game.startNewRound();
                }

                document.getElementById('loading').style.visibility = 'hidden';

                var div = document.getElementById('players');

                for (var i = 0; i < data.members.length; ++i) {
                    var member = data.members[i];

                    var p = document.createElement('p');
                    p.innerHTML = member.userName + (member.me ? ' (me)' : '');
                    div.appendChild(p);
                }
            },

            memberJoined: function (data) {
                var div = document.getElementById('players');

                var p = document.createElement('p');
                p.innerHTML = data.userName;
                div.appendChild(p);
            },

            newRound: function (data) {
                //TODO: workaround until results are not sent
                if (Game.adaptGuess) {
                    document.getElementById('guess').classList.remove('adapt');
                }

                if (Game.rounds.length === Game.NUMBER_OF_ROUNDS) {
                    Game.reset();
                }

                // if player didn't guess - TODO: show everything on a map
                if (data.result && Game.rounds.length > 0 && !Game.rounds[Game.rounds.length - 1].position) {
                    Game.rounds[Game.rounds.length - 1].position = data.result.position;
                    Game.addRealGuessPair(data.result.position, null);
                }

                Game.panoId = data.place.panoId;
                Game.pov = data.place.pov;

                MapGuesser.hideModal();
                Game.resetRound();
                Game.startNewRound();
            }
        },

        prepare: function () {
            var data = new FormData();
            var userNames;

            if (roomId) {
                var userNames = localStorage.userNames ? JSON.parse(localStorage.userNames) : {};
                if (!userNames.hasOwnProperty(roomId)) {
                    userNames[roomId] = prompt('Your name: ');
                    localStorage.userNames = JSON.stringify(userNames);
                }

                data.append('userName', userNames[roomId]);
            }

            document.getElementById('loading').style.visibility = 'visible';

            var url = roomId ? '/multiGame/' + roomId + '/prepare.json' : '/game/' + mapId + '/prepare.json';
            MapGuesser.httpRequest('POST', url, function () {
                document.getElementById('loading').style.visibility = 'hidden';

                document.getElementById('mapName').innerHTML = this.response.mapName;
                Game.mapBounds = this.response.bounds;

                Game.initialize();

                if (roomId) {
                    Game.multi.token = this.response.token;
                    Game.multi.owner = this.response.owner;

                    MapGuesser.showModal('multi');
                    if (Game.multi.owner) {
                        document.getElementById('startMultiGameButton').style.display = 'block';
                    }

                    document.getElementById('loading').style.visibility = 'visible';

                    Game.MultiConnector.connect();
                }
            }, data);
        },

        initialize: function () {
            document.getElementById('panoCover').style.visibility = 'visible';
            document.getElementById('currentRound').innerHTML = '1/' + String(Game.NUMBER_OF_ROUNDS);
            document.getElementById('currentScoreSum').innerHTML = '0/0';

            Game.map.setOptions({
                draggableCursor: 'crosshair'
            });
            Game.map.fitBounds(Game.mapBounds);

            if (roomId) {
                // if it is multiplayer mode, data is sent via WS
                return;
            }

            document.getElementById('loading').style.visibility = 'visible';

            MapGuesser.httpRequest('POST', '/game/' + mapId + '/initialData.json', function () {
                document.getElementById('loading').style.visibility = 'hidden';
                document.getElementById('panoCover').style.visibility = 'hidden';

                if (this.response.error) {
                    //TODO: handle this error
                    return;
                }

                Game.panoId = this.response.place.panoId;
                Game.pov = this.response.place.pov;

                if (this.response.history) {
                    for (var i = 0; i < this.response.history.length; ++i) {
                        var round = this.response.history[i];
                        Game.rounds.push({ position: round.position, guessPosition: round.guessPosition, realMarker: null, guessMarker: null, line: null });
                        Game.addRealGuessPair(round.position, round.guessPosition, true);
                        Game.scoreSum += round.score;
                    }

                    document.getElementById('currentRound').innerHTML = String(Game.rounds.length) + '/' + String(Game.NUMBER_OF_ROUNDS);
                    document.getElementById('currentScoreSum').innerHTML = String(Game.scoreSum) + '/' + String(Game.rounds.length * Game.MAX_SCORE);
                }

                Game.startNewRound();
            });
        },

        reset: function () {
            if (Game.guessMarker) {
                Game.guessMarker.setMap(null);
                Game.guessMarker = null;
            }

            for (var i = 0; i < Game.rounds.length; ++i) {
                var round = Game.rounds[i];

                if (round.realMarker) {
                    round.realMarker.setMap(null);
                }
                if (round.guessMarker) {
                    round.guessMarker.setMap(null);
                    round.line.setMap(null);
                }
            }

            Game.rounds = [];
            Game.scoreSum = 0;

            var distanceInfo = document.getElementById('distanceInfo');
            distanceInfo.children[0].style.display = null;
            distanceInfo.children[1].style.display = null;
            var scoreInfo = document.getElementById('scoreInfo');
            scoreInfo.children[0].style.display = null;
            scoreInfo.children[1].style.display = null;
            document.getElementById('continueButton').style.display = null;
            document.getElementById('startNewGameButton').style.display = null;

            document.getElementById('showGuessButton').style.visibility = null;
            document.getElementById('guess').style.visibility = null;
            document.getElementById('guess').classList.remove('result');

            Game.initialize();
        },

        resetRound: function () {
            document.getElementById('scoreBar').style.width = null;

            if (Game.rounds.length > 0) {
                var lastRound = Game.rounds[Game.rounds.length - 1];

                lastRound.realMarker.setVisible(false);
                if (lastRound.guessMarker) {
                    lastRound.guessMarker.setVisible(false);
                    lastRound.line.setVisible(false);
                }
            }

            document.getElementById('panoCover').style.visibility = 'hidden';
            document.getElementById('showGuessButton').style.visibility = null;
            document.getElementById('guess').style.visibility = null;
            document.getElementById('guess').classList.remove('result')

            Game.map.setOptions({
                draggableCursor: 'crosshair'
            });
            Game.map.fitBounds(Game.mapBounds);

            if (roomId) {
                // if it is multiplayer mode, data is sent via WS
                return;
            }

            Game.startNewRound();
        },

        startNewRound: function () {
            Game.rounds.push({ position: null, guessPosition: null, realMarker: null, guessMarker: null, line: null });

            document.getElementById('currentRound').innerHTML = String(Game.rounds.length) + '/' + String(Game.NUMBER_OF_ROUNDS);

            Game.loadPano(Game.panoId, Game.pov);
        },

        handleErrorResponse: function (error) {
            // for the time being we only handle the "no_session_found" error and reset the game

            if (roomId) {
                //TODO: better error message
                alert('Your session is invalid, please start multiplayer again!')
                return;
            }

            MapGuesser.httpRequest('GET', '/game/' + mapId + '/prepare.json', function () {
                Game.mapBounds = this.response.bounds;

                Game.reset();
            });
        },

        loadPano: function (panoId, pov) {
            if (Game.adaptGuess) {
                document.getElementById('guess').classList.add('adapt');
            }

            Game.panorama.setPov({ heading: pov.heading, pitch: pov.pitch });
            Game.panorama.setZoom(pov.zoom);
            Game.panorama.setPano(panoId);
        },

        evaluateGuess: function () {
            if (!Game.guessMarker) {
                return;
            }

            var guessPosition = Game.guessMarker.getPosition().toJSON();
            Game.rounds[Game.rounds.length - 1].guessPosition = guessPosition;

            document.getElementById('guessButton').disabled = true;
            if (Game.adaptGuess) {
                document.getElementById('guess').classList.remove('adapt');
            }
            document.getElementById('loading').style.visibility = 'visible';
            document.getElementById('panoCover').style.visibility = 'visible';

            var data = new FormData();
            data.append('lat', String(guessPosition.lat));
            data.append('lng', String(guessPosition.lng));

            var url = roomId ? '/multiGame/' + roomId + '/guess.json' : '/game/' + mapId + '/guess.json';
            MapGuesser.httpRequest('POST', url, function () {
                if (this.response.error) {
                    Game.handleErrorResponse(this.response.error);
                    return;
                }

                Game.guessMarker.setMap(null);
                Game.guessMarker = null;

                document.getElementById('loading').style.visibility = 'hidden';
                document.getElementById('guess').classList.add('result');

                Game.scoreSum += this.response.result.score;
                document.getElementById('currentScoreSum').innerHTML = String(Game.scoreSum) + '/' + String(Game.rounds.length * Game.MAX_SCORE);

                Game.rounds[Game.rounds.length - 1].position = this.response.result.position;
                Game.addRealGuessPair(this.response.result.position, guessPosition);

                var resultBounds = new google.maps.LatLngBounds();
                resultBounds.extend(this.response.result.position);
                resultBounds.extend(guessPosition);

                Game.map.setOptions({
                    draggableCursor: 'grab'
                });
                Game.map.fitBounds(resultBounds);

                document.getElementById('distance').innerHTML = Util.printDistanceForHuman(this.response.result.distance);
                document.getElementById('score').innerHTML = this.response.result.score;

                var scoreBarProperties = Game.calculateScoreBarProperties(this.response.result.score, Game.MAX_SCORE);
                var scoreBar = document.getElementById('scoreBar');
                scoreBar.style.backgroundColor = scoreBarProperties.backgroundColor;
                scoreBar.style.width = scoreBarProperties.width;

                if (Game.rounds.length === Game.NUMBER_OF_ROUNDS) {
                    document.getElementById('continueButton').style.display = 'none';
                    document.getElementById('showSummaryButton').style.display = 'block';
                }

                if (this.response.place) {
                    Game.panoId = this.response.place.panoId;
                    Game.pov = this.response.place.pov;
                } else {
                    if (!Game.multi.owner) {
                        //TODO: "waiting for" disabled button
                        document.getElementById('continueButton').style.display = 'none';
                    }
                    Game.panoId = null;
                    Game.pov = null;
                }
            }, data);
        },

        addRealGuessPair: function (position, guessPosition, hidden) {
            var round = Game.rounds[Game.rounds.length - 1];

            round.realMarker = new google.maps.Marker({
                map: Game.map,
                visible: !hidden,
                position: position,
                title: 'Open in Google Maps',
                zIndex: Game.rounds.length * 2,
                clickable: true,
                draggable: false,
                icon: {
                    url: STATIC_ROOT + '/img/markers/marker-green.svg?rev=' + REVISION,
                    size: new google.maps.Size(24, 32),
                    scaledSize: new google.maps.Size(24, 32),
                    anchor: new google.maps.Point(12, 32)
                },
            });

            round.realMarker.addListener('click', function () {
                window.open('https://www.google.com/maps/search/?api=1&query=' + this.getPosition().toUrlValue(), '_blank');
            });

            if (!guessPosition) {
                return;
            }

            round.guessMarker = new google.maps.Marker({
                map: Game.map,
                visible: !hidden,
                position: guessPosition,
                zIndex: Game.rounds.length,
                clickable: false,
                draggable: false,
                icon: {
                    url: STATIC_ROOT + '/img/markers/marker-gray-empty.svg?rev=' + REVISION,
                    size: new google.maps.Size(24, 32),
                    scaledSize: new google.maps.Size(24, 32),
                    anchor: new google.maps.Point(12, 32),
                    labelOrigin: new google.maps.Point(12, 14)
                },
                label: {
                    color: '#ffffff',
                    fontFamily: 'Roboto',
                    fontSize: '16px',
                    fontWeight: '500',
                    text: '?'
                }
            });

            round.line = new google.maps.Polyline({
                map: Game.map,
                visible: !hidden,
                path: [
                    position,
                    guessPosition
                ],
                geodesic: true,
                strokeOpacity: 0,
                icons: [{
                    icon: {
                        path: 'M 0,-1 0,1',
                        strokeOpacity: 1,
                        strokeWeight: 2,
                        scale: 2
                    },
                    offset: '0',
                    repeat: '10px'
                }],
                clickable: false,
                draggable: false,
                editable: false
            });
        },

        calculateScoreBarProperties: function (score, maxScore) {
            var percent = Math.floor((score / maxScore) * 100);

            var color;
            if (percent >= 90) {
                color = '#11ca00';
            } else if (percent >= 10) {
                color = '#ea9000';
            } else {
                color = '#ca1100';
            }

            return { width: percent + '%', backgroundColor: color };
        },

        showSummary: function () {
            var distanceInfo = document.getElementById('distanceInfo');
            distanceInfo.children[0].style.display = 'none';
            distanceInfo.children[1].style.display = 'block';
            var scoreInfo = document.getElementById('scoreInfo');
            scoreInfo.children[0].style.display = 'none';
            scoreInfo.children[1].style.display = 'block';
            document.getElementById('showSummaryButton').style.display = null;

            if (Game.multi.owner) {
                document.getElementById('startNewGameButton').style.display = 'block';
            }

            var resultBounds = new google.maps.LatLngBounds();

            for (var i = 0; i < Game.rounds.length; ++i) {
                var round = Game.rounds[i];

                round.realMarker.setIcon({
                    url: STATIC_ROOT + '/img/markers/marker-green-empty.svg?rev=' + REVISION,
                    size: new google.maps.Size(24, 32),
                    scaledSize: new google.maps.Size(24, 32),
                    anchor: new google.maps.Point(12, 32),
                    labelOrigin: new google.maps.Point(12, 14)
                });
                round.realMarker.setLabel({
                    color: '#285624',
                    fontFamily: 'Roboto',
                    fontSize: '16px',
                    fontWeight: '500',
                    text: String(i + 1)
                });

                round.realMarker.setVisible(true);
                if (round.guessMarker) {
                    round.guessMarker.setVisible(true);
                    round.line.setVisible(true);
                }

                resultBounds.extend(round.position);
                if (round.guessMarker) {
                    resultBounds.extend(round.guessPosition);
                }
            }

            Game.map.fitBounds(resultBounds);

            document.getElementById('scoreSum').innerHTML = String(Game.scoreSum);

            var scoreBarProperties = Game.calculateScoreBarProperties(Game.scoreSum, Game.NUMBER_OF_ROUNDS * Game.MAX_SCORE);
            var scoreBar = document.getElementById('scoreBar');
            scoreBar.style.backgroundColor = scoreBarProperties.backgroundColor;
            scoreBar.style.width = scoreBarProperties.width;
        },

        rewriteGoogleLink: function () {
            if (!Game.googleLink) {
                var anchors = document.getElementById('panorama').getElementsByTagName('a');
                for (var i = 0; i < anchors.length; i++) {
                    var a = anchors[i];
                    if (a.href.indexOf('maps.google.com/maps') !== -1) {
                        Game.googleLink = a;
                        break;
                    }
                }
            }

            setTimeout(function () {
                if (Game.googleLink) {
                    Game.googleLink.title = 'Google Maps';
                    Game.googleLink.href = 'https://maps.google.com/maps';
                }
            }, 1);
        }
    };

    var Util = {
        printDistanceForHuman: function (distance) {
            if (distance < 1000) {
                return Number.parseFloat(distance).toFixed(0) + ' m';
            } else if (distance < 10000) {
                return Number.parseFloat(distance / 1000).toFixed(2) + ' km';
            } else if (distance < 100000) {
                return Number.parseFloat(distance / 1000).toFixed(1) + ' km';
            } else {
                return Number.parseFloat(distance / 1000).toFixed(0) + ' km';
            }
        }
    };

    MapGuesser.sessionAvailableHooks.reinitializeGame = Game.prepare;

    if (!('ontouchstart' in document.documentElement)) {
        Game.adaptGuess = true;
    }

    Game.map = new google.maps.Map(document.getElementById('map'), {
        disableDefaultUI: true,
        clickableIcons: false,
        draggingCursor: 'grabbing'
    });

    Game.map.addListener('click', function (e) {
        if (Game.rounds[Game.rounds.length - 1].guessPosition) {
            return;
        }

        if (Game.guessMarker) {
            Game.guessMarker.setPosition(e.latLng);
            return;
        }

        Game.guessMarker = new google.maps.Marker({
            map: Game.map,
            position: e.latLng,
            clickable: false,
            draggable: true,
            icon: {
                url: STATIC_ROOT + '/img/markers/marker-gray-empty.svg?rev=' + REVISION,
                size: new google.maps.Size(24, 32),
                scaledSize: new google.maps.Size(24, 32),
                anchor: new google.maps.Point(12, 32),
                labelOrigin: new google.maps.Point(12, 14)
            },
            label: {
                color: '#ffffff',
                fontFamily: 'Roboto',
                fontSize: '16px',
                fontWeight: '500',
                text: '?'
            }
        });

        document.getElementById('guessButton').disabled = false;
    });

    Game.panorama = new google.maps.StreetViewPanorama(document.getElementById('panorama'), {
        disableDefaultUI: true,
        linksControl: true,
        showRoadLabels: false,
        motionTracking: false
    });

    Game.panorama.addListener('position_changed', function () {
        Game.rewriteGoogleLink();
    });

    Game.panorama.addListener('pov_changed', function () {
        Game.rewriteGoogleLink();
    });

    if (COOKIES_CONSENT) {
        Game.prepare();
    }

    document.getElementById('showGuessButton').onclick = function () {
        this.style.visibility = 'hidden';
        document.getElementById('guess').style.visibility = 'visible';
    }

    document.getElementById('closeGuessButton').onclick = function () {
        document.getElementById('showGuessButton').style.visibility = null;
        document.getElementById('guess').style.visibility = null;
    }

    document.getElementById('guessButton').onclick = function () {
        Game.evaluateGuess();
    }

    document.getElementById('continueButton').onclick = function () {
        if (roomId) {
            if (!Game.multi.owner) {
                return;
            }

            document.getElementById('loading').style.visibility = 'visible';

            MapGuesser.httpRequest('POST', '/multiGame/' + roomId + '/nextRound.json', function () {
                document.getElementById('loading').style.visibility = 'hidden';
            });
        } else {
            Game.resetRound();
        }
    }

    document.getElementById('showSummaryButton').onclick = function () {
        Game.showSummary();
    }

    document.getElementById('startNewGameButton').onclick = function () {
        if (roomId) {
            if (!Game.multi.owner) {
                return;
            }

            document.getElementById('loading').style.visibility = 'visible';

            MapGuesser.httpRequest('POST', '/multiGame/' + roomId + '/initialData.json', function () {
                document.getElementById('loading').style.visibility = 'hidden';
            });
        } else {
            Game.reset();
        }
    }

    document.getElementById('startMultiGameButton').onclick = function () {
        if (!roomId || !Game.multi.owner) {
            return;
        }

        MapGuesser.hideModal();
        document.getElementById('loading').style.visibility = 'visible';

        MapGuesser.httpRequest('POST', '/multiGame/' + roomId + '/initialData.json', function () {
            document.getElementById('loading').style.visibility = 'hidden';
        });
    }
})();