// In-match top bar (research 06 §11.1): exit + ping (left); round box, phase capsule (prep label /
// kills n/m / boss HP bar), LP tower, match-info and enemy-preview buttons (centre, bracket frame);
// 7-segment countdown with gauge and the 准备就绪 toggle (right).
// The two 🔍 buttons follow the official HUD bindings (research 09 §2.1 / §6.2 item 3):
//   left  btn_check_player  — mint [🔍] opens the 本局信息 dialog (ui/enemyDrawer.js; its 敌方情报 tab is the secondary
//                             enemy list); in the pen view it becomes [🔍◀◀] (btn_check_player_back) and returns the camera;
//   right btn_check_enemy   — amber [🔍▶▶] pans the camera to the enemy preview pen (休整期 only); in the pen view (and
//                             outside prep) it is the grey [🔍] (btn_check_enemy_unfold) — pressing it in the pen returns too.
// Official sprites (local ui/battle extraction) when installed, CSS look-alikes otherwise.
// Boss rounds (最终攻势 / 隐秘核心): the countdown is the level's 120 s maxPlayTime (m.public.deadline, gauge total from
// gameLogic phaseTotalSeconds) and the red DOT overtime warning under it keys off m.public.overtimeAt (ui/matchStatus.js
// overtimeState): "NN 秒后全队生命值开始流失" once the level time ran out, then a live "生命值 −1/秒" indicator while the
// merged team LP drains (the LP tower turns red). Solo battles: a pause / resume button beside the countdown (g.pause);
// while m.public.paused every clock here is frozen at the pause moment (`frozenAt`).

import { useRef } from '../../vendor/hooks.module.js';
import { PHASE } from '../../../shared/constants.js';
import { html, Button, Icon, PingPill, Countdown, Tooltip, MicroLabel, DifficultyTag, useTicker } from './components.js';
import { Sprite, LpTower, GIcon, LocalSprite } from './gameComponents.js';
import { localAsset } from '../data.js';
import { serverNow } from '../store.js';
import { isCombatPhase, isBossPhase, prepCapsuleLabel, bossFrac, fmtNum, shopBlockReason } from './gameLogic.js';
import { overtimeState, overtimeDrainPerSec, remainAt } from './matchStatus.js';

const cx = (...p) => p.flat().filter(Boolean).join(' ');

/**
 * Phase capsule: prep label, kills n/m (combat/unite), kills + boss HP bar (boss rounds).
 * @param {{ pub:any, hud:any }} props
 */
export function PhaseCapsule({ pub, hud }) {
  const phase = pub?.phase;
  if (isBossPhase(phase)) {
    const boss = pub.bossHp || hud?.boss || null;
    const frac = bossFrac(boss);
    return html`<div class="capsule capsule--boss" role="status">
      <${Sprite} k="hudPanel/icon_boss" class="capsule__icon" fallback=${html`<${GIcon} name="skull" class="capsule__icon" />`} />
      ${hud?.total != null ? html`<span class="capsule__kills num"><b>${hud.killed ?? 0}</b>/${hud.total}</span>` : null}
      <div class="bossbar" title=${boss ? `${fmtNum(boss.hp)} / ${fmtNum(boss.max)}` : '敌方领袖'}>
        <div class="bossbar__fill" style=${`width:${frac == null ? 100 : frac * 100}%`}></div>
        <span class="bossbar__txt num">${frac == null ? '敌方领袖' : `${(frac * 100).toFixed(frac < 0.1 ? 1 : 0)}%`}</span>
      </div>
    </div>`;
  }
  if (isCombatPhase(phase) || (phase === PHASE.SETTLE && hud?.total != null)) {
    return html`<div class=${cx('capsule', 'capsule--combat', phase === PHASE.UNITE && 'capsule--unite')} role="status">
      <${Sprite} k=${phase === PHASE.UNITE ? 'hudPanel/icon_coop' : 'hudPanel/icon_battle'} class="capsule__icon"
        fallback=${html`<${Icon} name="sword" class="capsule__icon" />`} />
      <span class="capsule__kills num"><b>${hud?.killed ?? 0}</b>/${hud?.total ?? '--'}</span>
      ${phase === PHASE.UNITE ? html`<span class="capsule__tag">联防</span>` : null}
    </div>`;
  }
  return html`<div class="capsule capsule--prep" role="status">
    <${Sprite} k="hudPanel/icon_rest" class="capsule__icon" fallback=${html`<${Icon} name="rook" class="capsule__icon" />`} />
    <span class="capsule__label">${prepCapsuleLabel(phase)}</span>
  </div>`;
}

/**
 * Ready toggle (PREP only). Disabled with a reason while the temp hand is non-empty.
 * @param {{ priv:any, onToggle:(ready:boolean)=>void, busy?:boolean, readyCount?:number, total?:number }} props
 */
export function ReadyToggle({ priv, onToggle, busy, readyCount, total }) {
  const ready = !!priv?.ready;
  const reason = !ready ? shopBlockReason('ready', { priv, editable: true }) : null;
  const btn = html`<button type="button" class=${cx('readybtn', 'tapx', ready && 'is-on', busy && 'is-busy')} disabled=${!!reason || busy}
      aria-pressed=${ready ? 'true' : 'false'} onClick=${() => onToggle(!ready)}>
    <span class="readybtn__box">${ready ? html`<${Icon} name="check" />` : null}</span>
    <span class="readybtn__label">${ready ? '取消准备' : '准备就绪'}</span>
    <kbd class="readybtn__key">Space</kbd>
  </button>`;
  return html`<div class="readywrap">
    ${reason ? html`<${Tooltip} text=${reason} placement="bottom">${btn}<//>` : btn}
    ${Number.isFinite(total) && total > 1 ? html`<span class="readywrap__count">已就绪 <b class="num">${readyCount}</b>/<span class="num">${total}</span></span>` : null}
  </div>`;
}

/**
 * Sprite + look of the two 🔍 HUD buttons for a state (pure; tested in test/ui/uiFixes.test.js).
 * @param {{ pen: boolean, penAvail: boolean, infoOpen: boolean }} st
 * @returns {{ left: { sprite: string, back: boolean, label: string, tip: string }, right: { sprite: string, grey: boolean, label: string, tip: string } }}
 */
export function checkButtons({ pen, penAvail, infoOpen }) {
  const left = pen
    ? { sprite: 'btn_check_player_back', back: true, label: '返回', tip: '返回战场' }
    : { sprite: infoOpen ? 'btn_check_player_unfold' : 'btn_check_player_normal', back: false, label: '本局信息', tip: '本局信息（策略 / 禁用盟约 / 干员）' };
  const right = pen
    ? { sprite: 'btn_check_enemy_unfold', grey: true, label: '返回', tip: '返回' }
    : penAvail
      ? { sprite: 'btn_check_enemy', grey: false, label: '敌方情报', tip: '查看即将迎击的敌方单位' }
      : { sprite: 'btn_check_enemy_unfold', grey: true, label: '敌方情报', tip: '休整期可以查看即将迎击的敌方单位' };
  return { left, right };
}

/** One official 🔍 button: the sprite when installed, a CSS look-alike (icon + chevrons) otherwise. */
function CheckBtn({ sprite, cls, label, chev, on, disabled, onClick, testid }) {
  const url = localAsset('ui/battle', sprite);
  return html`<button type="button" class=${cx(cls, 'tapx', url && 'has-sprite', chev && 'is-wide', on && 'is-on')}
      style=${url ? `--chk-sprite:url("${url}")` : ''} aria-label=${label} aria-disabled=${disabled ? 'true' : 'false'}
      data-sprite=${sprite} data-testid=${testid} onClick=${onClick}>
    ${url ? null : html`<${Icon} name="search" />${chev ? html`<span class="enemybtn__chev">${chev}</span>` : null}`}
  </button>`;
}

/**
 * The red overtime (DOT) warning of a boss round (pure view of ui/matchStatus.js overtimeState).
 * @param {{ ot: ReturnType<typeof overtimeState> }} props
 */
export function OvertimeWarning({ ot }) {
  if (!ot) return null;
  if (ot.state === 'pending') {
    return html`<div class="otwarn otwarn--pending" role="alert" data-state="pending">
      <${LocalSprite} name="icon_warn" class="otwarn__icon" fallback=${html`<${Icon} name="warn" class="otwarn__icon" />`} />
      <span class="otwarn__tag">DOT</span>
      <span class="otwarn__txt"><b class="num">${ot.secs}</b> 秒后全队生命值开始流失</span>
    </div>`;
  }
  return html`<div class="otwarn otwarn--drain" role="alert" data-state="drain">
    <span class="otwarn__blood">
      <${LocalSprite} name="blood_icon" class="otwarn__icon" fallback=${html`<${Icon} name="rook" class="otwarn__icon" />`} />
    </span>
    <span class="otwarn__tag">DOT</span>
    <span class="otwarn__txt">超时 · 生命值 <b class="num">−${ot.perSec}</b>/秒</span>
    ${ot.lost > 0 ? html`<span class="otwarn__lost">已流失 <b class="num">${ot.lost}</b></span>` : null}
    <span key=${ot.secs} class="otwarn__tick num" aria-hidden="true">−${ot.perSec}</span>
  </div>`;
}

/** Two-bar pause glyph (the official battle pause button). */
function PauseGlyph() {
  return html`<svg class="pausebtn__glyph" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 4h4.5v16H6zm7.5 0H18v16h-4.5z" /></svg>`;
}

/**
 * Solo pause / resume control (g.pause): pressed while paused.
 * @param {{ paused: boolean, busy?: boolean, onToggle: () => void }} props
 */
export function PauseButton({ paused, busy = false, onToggle }) {
  const label = paused ? '继续作战' : '暂停';
  return html`<${Tooltip} text=${paused ? '继续作战（Space）' : '暂停作战（Space）'} placement="bottom">
    <button type="button" class=${cx('pausebtn', 'tapx', paused && 'is-on', busy && 'is-busy')} aria-pressed=${paused ? 'true' : 'false'}
        aria-label=${label} disabled=${busy} data-testid="pause" onClick=${() => onToggle?.()}>
      ${paused ? html`<${Icon} name="play" class="pausebtn__glyph" />` : html`<${PauseGlyph} />`}
    </button>
  <//>`;
}

/**
 * Top bar.
 * @param {{ pub:any, priv:any, conn:any, hud:any, total:number|null, drawer:string|null, onExit:Function, onDrawer:(tab:string)=>void,
 *   onReady:(r:boolean)=>void, readyBusy?:boolean, readyCount?:number, playerCount?:number,
 *   pen?:boolean, penAvail?:boolean, onPen?:(on:boolean)=>void, config?: any, frozenAt?: number|null,
 *   pause?: { show: boolean, paused: boolean, busy?: boolean, onToggle: () => void } | null }} props
 *   frozenAt: the server time every clock shows while the solo match is paused (null = live)
 */
export function TopBar({ pub, priv, conn, hud, total, drawer, onExit, onDrawer, onReady, readyBusy, readyCount, playerCount, pen = false, penAvail = false, onPen = () => {},
  config = null, frozenAt = null, pause = null }) {
  const phase = pub?.phase;
  const boss = isBossPhase(phase);
  const lp = boss && Number.isFinite(pub?.teamLp) ? pub.teamLp : Number.isFinite(priv?.lp) ? priv.lp : null;
  const hidden = phase === PHASE.HIDDEN_CORE || (Number.isFinite(pub?.lastRound) && pub.round > pub.lastRound);
  const roundText = hidden ? '??' : pub?.round > 0 ? String(pub.round) : '--';
  const showReady = phase === PHASE.PREP && priv?.alive !== false;
  // boss rounds: the overtime warning follows the clock (4 Hz while live; frozen while paused)
  const otLive = boss && Number(pub?.overtimeAt) > 0;
  useTicker(otLive && frozenAt == null ? 250 : 0);
  const now = Number.isFinite(frozenAt) ? frozenAt : serverNow();
  const ot = otLive ? overtimeState(pub, now, { perSec: overtimeDrainPerSec(config) }) : null;
  const draining = ot?.state === 'drain';
  const lowLp = (Number.isFinite(lp) && lp <= 5) || draining;
  const frozenSecs = Number.isFinite(frozenAt) ? remainAt(pub?.deadline, frozenAt) : null;
  const btn = checkButtons({ pen, penAvail, infoOpen: !!drawer });
  const onLeft = () => (pen ? onPen(false) : onDrawer('info'));
  const onRight = () => (pen ? onPen(false) : penAvail ? onPen(true) : null);
  return html`<header class=${cx('gtop', pen && 'is-pen')}>
    <div class="gtop__left">
      <${Button} variant="danger" size="lg" square=${true} icon="exit" onClick=${onExit} aria-label="离开" title="离开 / 暂离" class="gtop__exit tapx" />
      <div class="gtop__meta">
        <${PingPill} ms=${conn?.ping} online=${conn?.status === 'online'} />
        ${pub?.difficulty ? html`<${DifficultyTag} difficulty=${pub.difficulty} size="sm" />` : null}
      </div>
    </div>

    <div class="gtop__center brackets">
      <${Tooltip} text=${btn.left.tip} placement="bottom">
        <${CheckBtn} sprite=${btn.left.sprite} cls=${cx('gtop__iconbtn', btn.left.back && 'is-back')} label=${btn.left.label}
          chev=${btn.left.back ? '◀◀' : null} on=${!!drawer && !pen} onClick=${onLeft} testid="check-player" />
      <//>
      <div class="roundbox">
        <span class="roundbox__label">回合</span>
        <b class="roundbox__num num">${roundText}</b>
      </div>
      <${PhaseCapsule} pub=${pub} hud=${hud} />
      <${LpTower} value=${lp} size="lg" tone=${lowLp ? 'danger' : boss ? 'team' : null} />
      <${Tooltip} text=${btn.right.tip} placement="bottom">
        <${CheckBtn} sprite=${btn.right.sprite} cls=${cx('enemybtn', btn.right.grey && 'is-grey')} label=${btn.right.label}
          chev=${btn.right.grey ? null : '▶▶'} disabled=${btn.right.grey && !pen} onClick=${onRight} testid="check-enemy" />
      <//>
    </div>

    <div class="gtop__right">
      <div class="gtop__clock">
        ${frozenSecs != null
          ? html`<${Countdown} seconds=${frozenSecs} total=${total ?? undefined} size="md" label="PAUSED" />`
          : html`<${Countdown} deadline=${pub?.deadline} total=${total ?? undefined} size="md" />`}
        ${pause && (pause.show || pause.paused) ? html`<${PauseButton} paused=${!!pause.paused} busy=${pause.busy} onToggle=${pause.onToggle} />` : null}
      </div>
      <${OvertimeWarning} ot=${ot} />
      ${showReady ? html`<${ReadyToggle} priv=${priv} onToggle=${onReady} busy=${readyBusy} readyCount=${readyCount} total=${playerCount} />` : null}
    </div>
  </header>`;
}

/** DP counter shown at the right edge during combat. */
export function DpCounter({ dp }) {
  if (!Number.isFinite(dp)) return null;
  return html`<div class="dpbox" title="部署费用（再部署消耗）">
    <${GIcon} name="dp" class="dpbox__icon" /><b class="num">${Math.floor(dp)}</b><${MicroLabel}>COST</${MicroLabel}>
  </div>`;
}

/** Hook: stable callback ref helper. */
export function useLatest(v) {
  const r = useRef(v);
  r.current = v;
  return r;
}