import type { ComposedUnit, PlaceRejectReason } from '../types/MergeTypes';
import { MergeEventType } from './MergeEventType';

export type MergeEvent =
    | { type: MergeEventType.BagRefreshed; playEntrance?: boolean }
    | { type: MergeEventType.BagSlotMoved; fromSlot: number; toSlot: number }
    | { type: MergeEventType.TilePlaced; gridIndex: number; weapon2Id: number }
    | { type: MergeEventType.TileMoved; fromGrid: number; toGrid: number }
    | { type: MergeEventType.TileReturned; gridIndex: number; bagSlot: number }
    | { type: MergeEventType.ComposeChanged; compositions: ComposedUnit[] }
    | { type: MergeEventType.BagMerged; slotIndex: number; weapon1Id: number; level: number }
    | { type: MergeEventType.MapUpgraded; gridIndex: number; weapon1Id: number; level: number }
    | {
        type: MergeEventType.GlyphRewritten;
        target: { kind: 'map'; gridIndex: number } | { kind: 'bag'; slotIndex: number };
        weapon2Id: number;
        level: number;
    }
    | { type: MergeEventType.PlaceRejected; reason: PlaceRejectReason };

export type MergeEventListener = (event: MergeEvent) => void;

export const MergeEventFactory = {
    bagRefreshed(playEntrance = true): MergeEvent {
        return { type: MergeEventType.BagRefreshed, playEntrance };
    },
    bagSlotMoved(fromSlot: number, toSlot: number): MergeEvent {
        return { type: MergeEventType.BagSlotMoved, fromSlot, toSlot };
    },
    tilePlaced(gridIndex: number, weapon2Id: number): MergeEvent {
        return { type: MergeEventType.TilePlaced, gridIndex, weapon2Id };
    },
    tileMoved(fromGrid: number, toGrid: number): MergeEvent {
        return { type: MergeEventType.TileMoved, fromGrid, toGrid };
    },
    tileReturned(gridIndex: number, bagSlot: number): MergeEvent {
        return { type: MergeEventType.TileReturned, gridIndex, bagSlot };
    },
    composeChanged(compositions: ComposedUnit[]): MergeEvent {
        return { type: MergeEventType.ComposeChanged, compositions };
    },
    bagMerged(slotIndex: number, weapon1Id: number, level: number): MergeEvent {
        return { type: MergeEventType.BagMerged, slotIndex, weapon1Id, level };
    },
    mapUpgraded(gridIndex: number, weapon1Id: number, level: number): MergeEvent {
        return { type: MergeEventType.MapUpgraded, gridIndex, weapon1Id, level };
    },
    glyphRewritten(
        target: { kind: 'map'; gridIndex: number } | { kind: 'bag'; slotIndex: number },
        weapon2Id: number,
        level: number,
    ): MergeEvent {
        return { type: MergeEventType.GlyphRewritten, target, weapon2Id, level };
    },
    placeRejected(reason: PlaceRejectReason): MergeEvent {
        return { type: MergeEventType.PlaceRejected, reason };
    },
};