import { Vec3 } from 'cc';
import type { BattleSession } from 'db://assets/mx/module/battle';
import { BattleTeamId } from 'db://assets/mx/module/battle/ecs/BattleTeamId';
import { AttrId, AttributeComp, TeamComp } from 'db://assets/mx/module/battle/ecs/Components';
import type { EntityId } from 'db://assets/mx/module/ecs';
import { TableNames } from '../../game/ConfigTableData';
import { WANG_MU_WEAPON1_ID } from '../heros/HeroActorRes';
import { WANGMU_ULT_BUFF_GROUP } from '../combat/TowerPositiveBuffState';
import { getTowerLoadoutService } from '../combat/TowerLoadoutService';
import { SkillPresentationEnv } from './SkillPresentationEnv';
import { isDesignDebugEnabled } from '../debug/DesignDebug';

export const ULT_FX_HOLD_SEC = 1.5;
export const ULT_FX_FADE_SEC = 0.3;

const FIELD_ATK_GROUP = 'wangmu_field_atk';

export interface WangMuUltParams {
    radiusPx: number;
    atkWan: number;
    aspdWan: number;
    critWan: number;
    critDamWan: number;
    durationSec: number;
}

/** 旧词条 type12 加攻扩展（配表已删，collect 恒空） */
interface Extra12 {
    attrCode: number;
    wan: number;
}

export function readWangMuUltParams(
    caster: EntityId,
    skillParts?: readonly number[] | null,
): WangMuUltParams | null {
    const parts = skillParts ?? SkillPresentationEnv.getWuSpinSkillParts(caster);
    if (!parts?.length || parts[0] !== 9 || parts.length < 7) return null;
    return {
        radiusPx: parts[1] ?? 0,
        atkWan: parts[2] ?? 0,
        aspdWan: parts[3] ?? 0,
        critWan: parts[4] ?? 0,
        critDamWan: parts[5] ?? 0,
        durationSec: parts[6] ?? 0,
    };
}

export function applyWangMuUltBuffs(
    caster: EntityId,
    center: Readonly<Vec3>,
    radiusPx: number,
    skillParts?: readonly number[] | null,
): void {
    const session = SkillPresentationEnv.getBattleSession();
    if (!session) return;
    const params = readWangMuUltParams(caster, skillParts);
    if (!params) return;
    const extras = collectType12(caster);
    const grantUltCrit = casterHasSpecialHead(caster, 13);
    const r2 = radiusPx * radiusPx;
    forEachAlly(session, caster, (id) => {
        const pos = allyWorldPos(id);
        if (!pos) return;
        const dx = pos.x - center.x;
        const dy = pos.y - center.y;
        if (dx * dx + dy * dy > r2) return;
        const weapon1Id = getTowerLoadoutService().getLoadout(id)?.weapon1Id ?? 0;
        applyTimedBuffs(session, id, params, extras, weapon1Id, grantUltCrit);
    });
    refreshWangMuFieldAtkSteal(session);
}

export function refreshWangMuFieldAtkSteal(session: BattleSession): void {
    const loadoutSvc = getTowerLoadoutService();
    session.world.view(TeamComp).forEach((id, team) => {
        if (!session.world.isAlive(id)) return;
        if (BattleTeamId.isEnemyTeam(team.team)) return;
        if (loadoutSvc.getLoadout(id)?.weapon1Id !== WANG_MU_WEAPON1_ID) return;
        applyFieldAtkSteal(session, id, team.ownerId);
    });
}

function applyTimedBuffs(
    session: BattleSession,
    target: EntityId,
    params: WangMuUltParams,
    extras: readonly Extra12[],
    targetWeapon1Id: number,
    grantUltCrit: boolean,
): void {
    let atkWan = params.atkWan;
    let critWan = params.critWan;
    let critDamWan = params.critDamWan;
    for (const e of extras) {
        if (e.attrCode === 1) atkWan += e.wan;
        else if (e.attrCode === 3) critWan += e.wan;
        else if (e.attrCode === 4) critDamWan += e.wan;
    }
    const remain = params.durationSec;
    const attrs = session.attributes;
    if (atkWan) {
        attrs.addModifier(target, {
            attr: AttrId.Attack,
            op: 'Mul',
            value: 1 + atkWan / 10000,
            source: 'wangmu_ult_atk',
            group: WANGMU_ULT_BUFF_GROUP,
            remain,
        });
    }
    if (params.aspdWan) {
        attrs.addModifier(target, {
            attr: 'aspd_add',
            op: 'Add',
            value: params.aspdWan,
            source: 'wangmu_ult_aspd',
            group: WANGMU_ULT_BUFF_GROUP,
            remain,
        });
    }
    if (critWan) {
        attrs.addModifier(target, {
            attr: AttrId.CritRate,
            op: 'Add',
            value: critWan / 10000,
            source: 'wangmu_ult_crit',
            group: WANGMU_ULT_BUFF_GROUP,
            remain,
        });
    }
    if (critDamWan) {
        attrs.addModifier(target, {
            attr: AttrId.CritDamage,
            op: 'Add',
            value: critDamWan / 10000,
            source: 'wangmu_ult_cdam',
            group: WANGMU_ULT_BUFF_GROUP,
            remain,
        });
    }
    if (grantUltCrit) {
        attrs.addModifier(target, {
            attr: 'ult_can_crit',
            op: 'Add',
            value: 1,
            source: 'wangmu_ult_skcrit',
            group: WANGMU_ULT_BUFF_GROUP,
            remain,
        });
    }
}

function applyFieldAtkSteal(session: BattleSession, caster: EntityId, ownerId: number): void {
    session.attributes.removeModifiersByGroup(caster, FIELD_ATK_GROUP);
    const wan = readType14Wan(caster);
    if (wan <= 0) return;
    const loadoutSvc = getTowerLoadoutService();
    const allyLines: string[] = [];
    let sum = 0;
    forEachAllyByOwner(session, ownerId, (id) => {
        if (id === caster) return;
        const atk = attackWithoutPostMul(session, id);
        const w1 = loadoutSvc.getLoadout(id)?.weapon1Id ?? 0;
        sum += atk;
        allyLines.push(
            `  ${weapon1Name(w1)} entity=${id} 抽成用攻击=${fmtAtk(atk)}`,
        );
    });
    const extra = sum * wan / 10000;
    const before = session.attributes.getAttr(caster, AttrId.Attack);
    if (extra > 0) {
        session.attributes.addModifier(caster, {
            attr: AttrId.Attack,
            op: 'PostMulAdd',
            value: extra,
            source: FIELD_ATK_GROUP,
            group: FIELD_ATK_GROUP,
        });
    }
    const after = session.attributes.getAttr(caster, AttrId.Attack);
    logWangMuFieldAtkSteal(caster, wan, allyLines, sum, extra, before, after);
}

/** 旧词条 Skill.skill_special type12 / group3 已删；无表字段可驱动 */
function collectType12(_caster: EntityId): Extra12[] {
    return [];
}

function casterHasSpecialHead(caster: EntityId, head: number): boolean {
    for (const raw of SkillPresentationEnv.getSkillSpecials(caster)) {
        if (Number(String(raw).split(',')[0]) === head) return true;
    }
    return false;
}

function readType14Wan(caster: EntityId): number {
    let wan = 0;
    for (const raw of SkillPresentationEnv.getSkillSpecials(caster)) {
        const p = String(raw).split(',').map(Number);
        if (p[0] === 14) wan += p[1] ?? 0;
    }
    return wan;
}

function forEachAlly(session: BattleSession, caster: EntityId, fn: (id: EntityId) => void): void {
    const team = session.world.getComponent(caster, TeamComp);
    if (!team) return;
    forEachAllyByOwner(session, team.ownerId, fn);
}

function forEachAllyByOwner(session: BattleSession, ownerId: number, fn: (id: EntityId) => void): void {
    session.world.view(TeamComp).forEach((id, team) => {
        if (!session.world.isAlive(id)) return;
        if (BattleTeamId.isEnemyTeam(team.team)) return;
        if (team.ownerId !== ownerId) return;
        fn(id);
    });
}

function allyWorldPos(entityId: EntityId): Vec3 | null {
    const origins = SkillPresentationEnv.getCompositionCastOrigins(entityId);
    if (!origins.length) return SkillPresentationEnv.getCasterGridCenter(entityId);
    if (origins.length === 1) return origins[0];
    let x = 0;
    let y = 0;
    let z = 0;
    for (const p of origins) {
        x += p.x;
        y += p.y;
        z += p.z;
    }
    const n = origins.length;
    return new Vec3(x / n, y / n, z / n);
}

function attackWithoutPostMul(session: BattleSession, id: EntityId): number {
    const full = session.attributes.getAttr(id, AttrId.Attack);
    const attr = session.world.getComponent(id, AttributeComp);
    if (!attr) return full;
    let post = 0;
    for (const m of attr.modifiers) {
        if (m.attr === AttrId.Attack && m.op === 'PostMulAdd') post += m.value;
    }
    return full - post;
}

function weapon1Name(weapon1Id: number): string {
    if (weapon1Id <= 0) return `未知(w1=${weapon1Id})`;
    const row = gg.data.table.getTableData<ITableHero>(TableNames.Hero, weapon1Id);
    return `${row?.name ?? '未知'}(w1=${weapon1Id})`;
}

function fmtAtk(n: number): string {
    return n.toFixed(2);
}

/** 策划验数：1656 天下归心（skill_special 14,万分比） */
function logWangMuFieldAtkSteal(
    caster: EntityId,
    wan: number,
    allyLines: readonly string[],
    sum: number,
    extra: number,
    before: number,
    after: number,
): void {
    if (!isDesignDebugEnabled()) return;
    const pct = (wan / 100).toFixed(1);
    console.log(
        '[王母][1656天下归心]',
        `entity=${caster}`,
        `\n  配表 skill_special=14,${wan} → 获得全场其他己方攻击之和的 ${wan}/10000=${pct}%`,
        '\n  各单位用最终攻击扣掉 PostMulAdd（抽成不吃攻击万分比，也不套抽成）；王母自身不计入',
        allyLines.length ? `\n${allyLines.join('\n')}` : '\n  （场上无其他己方）',
        `\n  合计=${fmtAtk(sum)}`,
        `\n  公式: ${fmtAtk(sum)} × ${wan}/10000 = ${fmtAtk(extra)}`,
        `\n  写入王母 Attack PostMulAdd=+${fmtAtk(extra)}`,
        `\n  王母最终攻击=(base+Add)×Mul+PostMulAdd  抽成前=${fmtAtk(before)} → 抽成后=${fmtAtk(after)}`,
    );
}