import type { MapRegionConfig } from '../config/BattleConfigTypes';
import type { Cell } from './Cell';

/** 地图区域（全图 / 子区域） */
export class MapRegion {
    /**
     * @param config 区域矩形配置
     */
    constructor(public config: MapRegionConfig) {}

    /**
     * @param cell 格子坐标
     * @returns 是否在区域内
     */
    contains(cell: Cell): boolean {
        const { startRow, rowCount, startCol, colCount } = this.config;
        return (
            cell.row >= startRow &&
            cell.row < startRow + rowCount &&
            cell.col >= startCol &&
            cell.col < startCol + colCount
        );
    }

    /**
     * @param anchor 锚点格子
     * @returns 钳制到区域内的锚点
     */
    clampAnchor(anchor: Cell): Cell {
        const { startRow, rowCount, startCol, colCount } = this.config;
        return {
            row: Math.min(Math.max(anchor.row, startRow), startRow + rowCount - 1),
            col: Math.min(Math.max(anchor.col, startCol), startCol + colCount - 1),
        };
    }
}

/**
 * @param rows 行数，默认 12
 * @param cols 列数，默认 10
 * @returns 全图部署区域
 */
export function createSoloRegion(rows = 12, cols = 10): MapRegion {
    return new MapRegion({ startRow: 0, rowCount: rows, startCol: 0, colCount: cols });
}