(function () {
    class Command {
        constructor(name, locus, orux, symbol, message) {
            this.name = name;
            this.locus = locus;
            this.orux = orux;
            this.symbol = symbol;
            this.message = message;
        }
    }

    class RoundaboutCommand {
        constructor(command, exitNumber) {
            this.name = command.name + exitNumber;
            this.locus = command.locus + exitNumber;
            this.orux = command.orux + exitNumber;
            this.symbol = command.symbol + exitNumber;
            this.message = command.message + exitNumber;
        }
    }

    class RoundaboutLeftCommand {
        constructor(command, exitNumber) {
            this.name = command.name + -exitNumber;
            this.locus = command.locus + -exitNumber;
            this.orux = command.orux + exitNumber;
            this.symbol = command.symbol + -exitNumber;
            this.message = command.message + -exitNumber;
        }
    }

    BR.VoiceHints = L.Class.extend({
        statics: {
            commands: (function () {
                return {
                    1: new Command('C', 1, 1002, 'Straight', 'straight'),
                    2: new Command('TL', 4, 1000, 'Left', 'left'),
                    3: new Command('TSLL', 3, 1017, 'TSLL', 'slight left'),
                    4: new Command('TSHL', 5, 1019, 'TSHL', 'sharp left'),
                    5: new Command('TR', 7, 1001, 'Right', 'right'),
                    6: new Command('TSLR', 6, 1016, 'TSLR', 'slight right'),
                    7: new Command('TSHR', 8, 1018, 'TSHR', 'sharp right'),
                    8: new Command('KL', 9, 1015, 'TSLL', 'keep left'),
                    9: new Command('KR', 10, 1014, 'TSLR', 'keep right'),
                    10: new Command('TU', 13, 1003, 'TU', 'u-turn'),
                    11: new Command('TRU', 14, 1003, 'TU', 'u-turn'), // Right U-turn
                    12: new Command('OFFR'), // Off route
                    13: new Command('RNDB', 26, 1008, 'RNDB', 'Take exit '), // Roundabout
                    14: new Command('RNLB', 26, 1008, 'RNLB', 'Take exit '), // Roundabout left
                };
            })(),
        },

        initialize: function (geoJson) {
            this.geoJson = geoJson;

            for (const feature of geoJson.features) {
                let voicehints = feature?.properties.voicehints;
                if (voicehints) {
                    this.voicehints = voicehints;
                    this.track = feature;
                    break;
                }
            }
        },

        add: function (turnInstructionMode) {
            if (!this.voicehints) return;

            for (const hint of this.voicehints) {
                const [indexInTrack, commandId, exitNumber] = hint;
                const coord = this.track.geometry.coordinates[indexInTrack];
                const cmd = this.getCommand(commandId, exitNumber);
                const properties = { name: cmd.message, sym: cmd.symbol.toLowerCase(), type: cmd.symbol };

                this.geoJson.features.push(turf.point(coord.slice(0, 2), properties));
            }
        },

        getCommand: function (id, exitNumber) {
            let command = BR.VoiceHints.commands[id];
            if (id === 13) {
                command = new RoundaboutCommand(command, exitNumber);
            } else if (id === 14) {
                command = new RoundaboutLeftCommand(command, exitNumber);
            }
            return command;
        },
    });

    BR.voiceHints = function (geoJson) {
        return new BR.VoiceHints(geoJson);
    };
})();