import type {Bot} from '@wp2508/mineflayer';
import type {BaseFunction, FunctionArgument} from '../../../types/bot/function/function.ts';

export class init implements BaseFunction<number[]> {
    readonly name = 'drop_slot_item_number';
    readonly i18n = {
        lang: 'zh-CN', name: '丢弃指定数量物品', description: '逐个丢弃指定槽位的物品，数量不超过槽位现有数量',
    };
    readonly args: FunctionArgument[] = [
        {name: 'slot', type: 'number', i18n: {lang: 'zh-CN', name: '物品槽位', description: '当前窗口中的槽位编号'}},
        {name: 'count', type: 'number', i18n: {lang: 'zh-CN', name: '丢弃数量', description: '大于零的整数，超过现有数量时丢弃全部'}},
    ];

    async run(bot: Bot, args: number[]): Promise<boolean> {
        if (!Array.isArray(args) || args.length !== 2 || !args.every(Number.isSafeInteger)) return false;
        const [slot, count] = args;
        const window = bot.currentWindow ?? bot.inventory;
        if (!window || slot < 0 || slot >= window.slots.length || count <= 0 || window.selectedItem) return false;
        const item = window.slots[slot];
        if (!item) return false;
        const drop_count = Math.min(count, item.count);
        const initial_count = item.count;
        const type = item.type;
        const metadata = item.metadata;
        try {
            for (let index = 0; index < drop_count; index++) {
                const current = window.slots[slot];
                if ((bot.currentWindow ?? bot.inventory) !== window || window.selectedItem
                    || !current || current.type !== type || current.metadata !== metadata
                    || current.count !== initial_count - index) return false;
                await bot.clickWindow(slot, 0, 4);
                if ((bot.currentWindow ?? bot.inventory) !== window || window.selectedItem) return false;
                const remaining = window.slots[slot];
                const expected = initial_count - index - 1;
                if (expected === 0 ? remaining !== null && remaining !== undefined
                    : !remaining || remaining.type !== type || remaining.metadata !== metadata
                        || remaining.count !== expected) return false;
            }
            return true;
        } catch {
            return false;
        }
    }
}