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import { TableNames } from '../../../game/ConfigTableData';
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import { aiLog } from '../runtime/AiLog';
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import { BattleBuffSlotType } from '../../../manager/battleBuff/BattleBuffTypes';
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/** 局内 AI 可抽 functiontype 下限（新表 1~16；排除 type=3 局外即时） */
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const AI_BUFF_FT_MIN = 1;
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/** 局内 AI 可抽 functiontype 上限 */
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const AI_BUFF_FT_MAX = 16;
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/** Battlebuff 加权不重复抽取 */
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export class AiBattlebuffPicker {
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/**
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* 按 type 与 weight 加权抽取不重复 buff id。
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* 仅 `type=1|2` 且 `functiontype∈[1,16]`；**排除 type=3**。
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* 新表无主动行时 `buffType=1` 返回 []。
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* @param buffType 1=主动，2=被动
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* @param count 目标个数
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* @param seed 随机种子
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*/
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pick(buffType: 1 | 2, count: number, seed: number): number[] {
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const need = Math.max(0, Math.floor(Number(count) || 0));
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if (need <= 0) return [];
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const list = gg.data.table.getTableList<ITableBattlebuff>(TableNames.Battlebuff) ?? [];
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const ids: number[] = [];
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const weights: number[] = [];
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for (let i = 0; i < list.length; i++) {
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const row = list[i];
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const slotType = Math.floor(Number(row.type) || 0);
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if (slotType === BattleBuffSlotType.Auto) continue;
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if (slotType !== buffType) continue;
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const ft = Math.floor(Number(row.functiontype) || 0);
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if (ft < AI_BUFF_FT_MIN || ft > AI_BUFF_FT_MAX) continue;
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const w = Math.max(0, Math.floor(Number(row.weight) || 0));
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if (w <= 0) continue;
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const id = Math.floor(Number(row.id) || 0);
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if (id <= 0) continue;
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ids.push(id);
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weights.push(w);
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}
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if (ids.length < need) {
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aiLog(`[AiBattlebuffPicker] candidate shortage buffType=${buffType} need=${need} have=${ids.length}`);
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return [];
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}
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const picked: number[] = [];
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let rng = (Math.floor(Number(seed) || 0) >>> 0) || 1;
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for (let n = 0; n < need; n++) {
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let total = 0;
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for (let i = 0; i < weights.length; i++) total += weights[i];
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if (total <= 0) {
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aiLog(`[AiBattlebuffPicker] remaining weight 0 buffType=${buffType} picked=${picked.join(',')}`);
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return [];
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}
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rng = (rng * 1664525 + 1013904223) >>> 0;
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let roll = (rng / 4294967296) * total;
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let choose = -1;
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for (let i = 0; i < weights.length; i++) {
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roll -= weights[i];
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if (roll < 0) {
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choose = i;
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break;
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}
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}
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if (choose < 0) choose = weights.length - 1;
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picked.push(ids[choose]);
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ids.splice(choose, 1);
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weights.splice(choose, 1);
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}
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return picked;
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}
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}
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