import Gamecfg from "../../common/gameCfg";
import { xlsChapterLayout } from "../../common/xlsConfig";
import UEBase from "../../frameWork/compment/UEBase";
import { GridConstant } from "./GridConstant";
import UECell, { I_CellData } from "./UECell";
import UECube from "./UECube";

const { ccclass, property } = cc._decorator;
const DRAG_THRESHOLD: number = 10; // 拖动判定阈值（像素）

@ccclass
export default class UEGridMap extends UEBase {
    static readonly BundleKey: string = "gridMap";
    static readonly PrefabUrl: string = "UEGridMap";
    static readonly CLS: string = "UEGridMap";
    @property(cc.Prefab)
    cellPrefab: cc.Prefab = null!;
    @property(cc.Prefab)
    cubePrefab: cc.Prefab = null!;
    @property(cc.Node)
    gridLayer: cc.Node = null;
    @property(cc.Node)
    cellLayer: cc.Node = null;
    @property(cc.Node)
    cubeLayer: cc.Node = null;
    cellMap: { [gid: number]: UECell } = {};
    private isDragging: boolean = false;
    private dragStartPos: cc.Vec2 = cc.v2(0, 0);
    private selectedCell: UECell = null!;
    private clickCnt: number = 0;
    Init() {
        this.gridLayer.setContentSize(GridConstant.CELL_WIDTH * GridConstant.ROW, GridConstant.CELL_HEIGHT * GridConstant.COL);
        this.LoadMapData();
        this.InitEvent();
    }

    InitEvent(): void {
        this.gridLayer.on(cc.Node.EventType.TOUCH_START, this.OnTouchStart, this);
        this.gridLayer.on(cc.Node.EventType.TOUCH_MOVE, this.OnTouchMove, this);
        this.gridLayer.on(cc.Node.EventType.TOUCH_END, this.OnTouchEnd, this);
        this.gridLayer.on(cc.Node.EventType.TOUCH_CANCEL, this.OnTouchEnd, this);
    }


    /** 加载地图数据 */
    private LoadMapData() {
        let chapterInfoCfg = Gamecfg.chapterInfo.getItem("1");
        let layoutCfg = Gamecfg.chapterLayoutList.getItemList("1");
        let layoutGridMap: { [grid: number]: xlsChapterLayout } = {};
        layoutCfg.forEach(element => {
            layoutGridMap[element.grid] = element;
        });
        const startX = -(GridConstant.ROW * GridConstant.CELL_WIDTH) / 2;
        const startY = (GridConstant.COL * GridConstant.CELL_HEIGHT) / 2;
        this.cellMap = {};
        for (let i = 0; i < GridConstant.COL; i++) {
            let rowCells = [];
            let rowCubes = [];
            for (let j = 0; j < GridConstant.ROW; j++) {
                let idx = (i + 1) * 10 + (j + 1);
                if (chapterInfoCfg.grid.indexOf(idx) != -1) {
                    let cell = this.CreateCell(i, j);
                    rowCells.push(cell);
                    let cellCfg: xlsChapterLayout = layoutGridMap[idx];
                    let cube = null;
                    if (cellCfg) {
                        cube = cc.instantiate(this.cubePrefab).getComponent(UECube);
                        rowCubes.push(cube);
                        this.cubeLayer.addChild(cube.node);
                        cube.node.width = GridConstant.CELL_WIDTH;
                        cube.node.height = GridConstant.CELL_HEIGHT;
                        cube.node.setPosition(cc.v2(
                            startX + j * GridConstant.CELL_WIDTH + GridConstant.CELL_WIDTH / 2,
                            startY - i * GridConstant.CELL_HEIGHT - GridConstant.CELL_HEIGHT / 2
                        ));
                        cube.Init({
                            type: cellCfg.type,
                            id: cellCfg.correlationId,
                            zIndex: idx,
                            unlock: cellCfg.unlock
                        }, idx)
                    }
                    cell.Init({
                        zIndex: idx,
                        ueCube: cube
                    });
                    this.cellMap[idx] = cell;
                }
            }

        }
    }

    /** 创建格子 */
    private CreateCell(i: number, j: number) {
        const startX = -(GridConstant.ROW * GridConstant.CELL_WIDTH) / 2;
        const startY = (GridConstant.COL * GridConstant.CELL_HEIGHT) / 2;
        let cell = cc.instantiate(this.cellPrefab).getComponent(UECell);
        this.cellLayer.addChild(cell.node);
        cell.node.width = GridConstant.CELL_WIDTH;
        cell.node.height = GridConstant.CELL_HEIGHT;
        cell.node.setPosition(cc.v2(
            startX + j * GridConstant.CELL_WIDTH + GridConstant.CELL_WIDTH / 2,
            startY - i * GridConstant.CELL_HEIGHT - GridConstant.CELL_HEIGHT / 2
        ));
        return cell;
    }

    private OnTouchStart(event: cc.Event.EventTouch): void {
        const touchPos = this.gridLayer.convertToNodeSpaceAR(event.getLocation());
        const cell = this.GetCellByPos(touchPos);
        if (cell && cell.CanDrag()) {
            this.dragStartPos = touchPos;
            if (this.selectedCell && this.selectedCell != cell) {
                this.selectedCell.SetSelect(false);
                this.clickCnt = 1;
            } else if (!this.selectedCell) {
                this.clickCnt = 1;
            }
            this.selectedCell = cell;
            cell.SetSelect(true);
        }
    }

    private OnTouchMove(event: cc.Event.EventTouch): void {
        if (!this.selectedCell) return;

        const touchPos = this.gridLayer.convertToNodeSpaceAR(event.getLocation());
        const distance = touchPos.sub(this.dragStartPos).mag();

        // 只有当移动距离超过阈值时才开始拖动
        if (!this.isDragging && distance >= DRAG_THRESHOLD) {
            this.isDragging = true;
            this.selectedCell.GetCube().StartDrag();
            this.selectedCell.SetSelect(false);
        }

        if (this.isDragging) {
            // 计算移动差值并应用到cube节点
            const deltaPos = touchPos.sub(this.dragStartPos);
            const cube = this.selectedCell.GetCube();
            const originalPos = cube.node.getPosition();
            cube.node.setPosition(originalPos.x + deltaPos.x, originalPos.y + deltaPos.y);
            this.dragStartPos = touchPos;
        }
    }

    private OnTouchEnd(event: cc.Event.EventTouch): void {
        if (!this.selectedCell) return;
        const touchPos = this.gridLayer.convertToNodeSpaceAR(event.getLocation());
        const targetCell = this.GetCellByPos(touchPos);
        if (!this.isDragging && this.selectedCell === targetCell) {
            //二次点击同一个格子
            if (!targetCell.IsEmpty()) {
                targetCell.GetCube().PlayJellyAnim();
                if (this.clickCnt >= 2) {
                    console.log("二次点击同一个格子");
                } else {
                    this.clickCnt++;
                }
            }
        } else {
            if (!this.isDragging) return;
            if (targetCell) {
                this.TryMergeItems(this.selectedCell, targetCell);
                this.selectedCell.SetSelect(false);
                targetCell.SetSelect(true);
            } else {
                this.selectedCell.GetCube().BackToOriginalPos(true);
            }
            this.isDragging = false;
            this.selectedCell = targetCell;
        }

    }

    private GetCellByPos(pos: cc.Vec2): UECell | null {
        const startX = -(GridConstant.ROW * GridConstant.CELL_WIDTH) / 2;
        const startY = (GridConstant.COL * GridConstant.CELL_HEIGHT) / 2;

        const row = Math.floor((pos.x - startX) / GridConstant.CELL_WIDTH);
        const col = Math.floor((startY - pos.y) / GridConstant.CELL_HEIGHT);

        if (col >= 0 && col < GridConstant.COL && row >= 0 && row < GridConstant.ROW) {
            let idx = (col + 1) * 10 + (row + 1);
            return this.cellMap[idx];
        }
        return null;
    }

    /** 尝试合成 */
    private TryMergeItems(fromCell: UECell, toCell: UECell): void {
        if (toCell.IsEmpty()) {
            //格子上没有物品
            fromCell.MoveCubeToCell(toCell);
            toCell.SetCube(fromCell.GetCube());
            fromCell.SetCube(null);
        } else if (this.CanMergeItems(fromCell, toCell)) {
            toCell.GetCube().PlayMergeAnim();
        } else {
            this.SwitchCell(fromCell, toCell);
        }
    }

    private CanMergeItems(fromCell: UECell, toCell: UECell): boolean {
        if (fromCell.GetCube().getCubeData().type == toCell.GetCube().getCubeData().type
            && fromCell.GetCube().getCubeData().id != fromCell.GetCube().getCubeData().id
        ) {
            return true;
        }

        return false;
    }

    private SwitchCell(fromCell: UECell, toCell: UECell): void {
        //交换格子
        let fromCube = fromCell.GetCube();
        let toCube = toCell.GetCube();
        fromCell.SetCube(toCube);
        toCell.SetCube(fromCube);
        toCube.MoveToNewPos(cc.v3(fromCell.node.x, fromCell.node.y));
        fromCube.MoveToNewPos(cc.v3(toCell.node.x, toCell.node.y), 0.05);
    }

    /** 抛出新的物品 */
    private ThrowNewItem() {

    }

}