const Game = new Vue({
    el: '#root',
    data: {
        map : [],
        viewAbleMap : [],
        player: {
            facing: 'down',
            isWalking: false,
            coolDownRunning: false,
            position: {
                x: 7,
                y: 7
            }
        },
        importJson: null,
        leftStep: false,
        currentMessage: null
    },
    created() {
        let game = this;

        axios.get('maps/town.json').then((response) => {
            game.map = response.data;
        });
    },
    mounted() {
        this.generateMap(15, 15)
    },
    methods: {
        generateMap(rowCount, tilesPerRow, importJson = null) {
            this.map = [];
            for (let rows = 0; rows < rowCount; rows++) {
                let newRow = [];

                for (let tiles = 0; tiles < tilesPerRow; tiles++) {
                    let sprite = 'img/tiles/city_paths/tile_888.png';

                    if (importJson) {
                        sprite = this.importJson[rows][tiles] ?? 'img/tiles/city_paths/tile_888.png';
                    }

                    let newTile = {
                        mapX: rows,
                        mapY: tiles,
                        sprite: sprite,
                        isWalkable: true
                    };

                    newRow.push(newTile);
                }

                this.map.push(newRow);
            }

            this.viewAbleMap = this.map;
        },
        getTileStyle(tile) {
            if (!this.map[tile.mapX] || !this.map[tile.mapX][tile.mapY]) {
                return false;
            }

            let sprite = this.map[tile.mapX][tile.mapY];
            return 'background-image: url("'+sprite.sprite+'");';
        },
        shiftMap(direction) {
            let game = this;

            if (this.player.facing !== direction) {
                this.player.facing = direction;
                return true;
            }

            if (this.player.coolDownRunning) {
                return false;
            }

            if (!this.getTargetTile() || !this.getTargetTile().isWalkable) {
                console.warn('collision detected');
                return false;
            }

            this.startWalkCooldown();
            this.updatePlayerPosition(direction);
            this.leftStep = !this.leftStep;

            this.player.isWalking = true;
            this.player.facing = direction;

            game.viewAbleMap.forEach((mapRow) => {
                mapRow.forEach((tile) => {
                    if (direction === 'up') {
                        tile.mapX--;
                    }

                    if (direction === 'down') {
                        tile.mapX++;
                    }

                    if (direction === 'left') {
                        tile.mapY--;
                    }

                    if (direction === 'right') {
                        tile.mapY++;
                    }
                });
            });
        },
        updatePlayerPosition(direction) {
            let game = this;

            if (direction === 'up') {
                game.player.position.x--;
            }

            if (direction === 'down') {
                game.player.position.x++;
            }

            if (direction === 'right') {
                game.player.position.y--;
            }

            if (direction === 'left') {
                game.player.position.y++;
            }
        },
        getPlayerSprite() {
            let step = '';

            if (this.leftStep && this.player.isWalking) {
                step = '_0';
            } else if (!this.leftStep && this.player.isWalking) {
                step = '_1';
            }

            return 'img/sprites/' + this.player.facing + step + '.png';
        },
        getNpcSprite(tile) {
            console.log(tile);
            return 'img/npcs/' + tile.npc.spriteset + '/' + tile.npc.facing + '.png';
        },
        startWalkCooldown() {
            let game = this;
            game.player.coolDownRunning = true;
            setTimeout(() => {
                game.player.coolDownRunning = false;
            }, 200);
        },
        action() {
            let targetTile = this.getTargetTile();

            if (!targetTile.npc) {
                console.log('no action found');
                return false;
            }

            if (targetTile.npc) {
                if (this.currentMessage) {
                    if (targetTile.npc.text[this.currentMessage.counter+1]) {
                        this.currentMessage = {
                            counter: this.currentMessage.counter+1,
                            text: targetTile.npc.text[this.currentMessage.counter+1]
                        };
                    } else {
                        this.currentMessage = null;
                    }
                } else {
                    this.currentMessage = {
                        counter: 0,
                        text: targetTile.npc.text[0]
                    };
                }
            }
        },
        getTargetTile() {
            let targetTile = this.map[this.player.position.x][this.player.position.y];

            if (this.player.facing === 'down') {
                targetTile = this.map[this.player.position.x+1][this.player.position.y];
            }

            if (this.player.facing === 'up') {
                targetTile = this.map[this.player.position.x-1][this.player.position.y];
            }

            if (this.player.facing === 'left') {
                targetTile = this.map[this.player.position.x][this.player.position.y+1];
            }

            if (this.player.facing === 'right') {
                targetTile = this.map[this.player.position.x][this.player.position.y-1];
            }

            return targetTile;
        }
    },
    computed: {},
    watch: {
        importJson() {
            this.importJson = JSON.parse(this.importJson);
            this.generateMap(15, 15, true)
        },
        leftStep() {
            let audio = new Audio('audio/footstep01.ogg');
            if (this.leftStep) {
                let audio = new Audio('audio/footstep00.ogg');
            }

            audio.volume = 0.1;
            audio.play();
        }
    }
});


// Check for Keypress
jQuery(document).keydown(function (e) {
    switch (e.keyCode) {
        // W, UP
        case 87:
        case 38:
            Game.shiftMap('up');
            break;

        // A, LEFT
        case 65:
        case 37:
            Game.shiftMap('left');
            break;

        // S, DOWN
        case 83:
        case 40:
            Game.shiftMap('down');
            break;
        // D, RIGHT
        case 68:
        case 39:
            Game.shiftMap('right');
            break;

        case 32:
            Game.action();
            break;

        // do nothing
        default:
            break;
    }
});

jQuery(document).keyup(function (e) {
    Game.player.isWalking = false;
});