/** Measure Cockpit panels against visible HUD and viewport obstacles. */
import {
  resolveCockpitUtilityAnchor,
  resolveCockpitUtilityLayout,
} from '../cockpitUtilityLayout.js';
import {
  COCKPIT_UTILITY_REC_GAP_PX,
  COCKPIT_UTILITY_SIGNAL_GAP_PX,
  COCKPIT_UTILITY_MIN_TOP_PX,
  COCKPIT_UTILITY_MIN_TOP_RATIO,
  COCKPIT_UTILITY_LAUNCHER_MIN_HEIGHT_PX,
  isRenderedOnScreen,
} from './cockpitPresentation.js';

export function scheduleContextLayout() {
  if (this.destroyed) return false;
  const contextVisible = this.context && !this.context.hidden;
  const signalVisible = this.signalStream && !this.signalStream.hidden;
  if ((!contextVisible && !signalVisible) || this.contextLayoutFrame !== null)
    return;
  this.contextLayoutFrame = requestAnimationFrame(() => {
    this.contextLayoutFrame = null;
    if (this.destroyed) return;
    this.syncContextLayout();
    this.syncSignalLayout();
  });
}

export function setContextCollapsed(collapsed) {
  const wasCollapsed = this.contextCollapsed;
  this.contextCollapsed = Boolean(collapsed);
  if (this.context)
    this.context.dataset.collapsed = String(this.contextCollapsed);
  if (this.contextToggle) {
    const expanded = !this.contextCollapsed;
    this.contextToggle.setAttribute('aria-expanded', String(expanded));
    this.contextToggle.setAttribute(
      'aria-label',
      `${expanded ? 'Collapse' : 'Expand'} Contact panel`,
    );
    this.contextToggle.title = `${expanded ? 'Collapse' : 'Expand'} contact panel`;
    const icon = this.contextToggle.querySelector('.material-symbols-outlined');
    if (icon) icon.textContent = expanded ? 'chevron_left' : 'chevron_right';
  }
  if (this.active && wasCollapsed && !this.contextCollapsed) {
    window.dispatchEvent(new CustomEvent('gev:cockpit-context-expanded'));
  }
  this.scheduleContextLayout();
}

export function setSignalCollapsed(collapsed, { user = false } = {}) {
  const wasCollapsed = this.signalCollapsed;
  this.signalCollapsed = Boolean(collapsed);
  if (user) this.signalUserCollapsed = this.signalCollapsed;
  if (this.signalStream)
    this.signalStream.dataset.collapsed = String(this.signalCollapsed);
  if (this.signalToggle) {
    const expanded = !this.signalCollapsed;
    this.signalToggle.setAttribute('aria-expanded', String(expanded));
    this.signalToggle.setAttribute(
      'aria-label',
      `${expanded ? 'Collapse' : 'Expand'} cockpit briefing panel`,
    );
    this.signalToggle.title = `${expanded ? 'Collapse' : 'Expand'} briefing panel`;
    const icon = this.signalToggle.querySelector('.material-symbols-outlined');
    if (icon)
      icon.textContent = expanded ? 'right_panel_close' : 'right_panel_open';
  }
  if (this.signalCollapsed) this.stopBriefRotation();
  else this.startBriefRotation({ reset: true });
  if (this.active && wasCollapsed && !this.signalCollapsed) {
    window.dispatchEvent(new CustomEvent('gev:cockpit-signal-expanded'));
  }
  this.scheduleContextLayout();
}

export function syncContextLayout() {
  if (!this.context || this.context.hidden) return;
  if (window.matchMedia('(max-width: 760px)').matches) {
    this.context.dataset.layoutMode = 'compact-bottom';
    this.context.style.removeProperty('--cockpit-context-left');
    this.context.style.removeProperty('--cockpit-context-top');
    this.context.style.removeProperty('--cockpit-context-max-height');
    return;
  }

  const desktopInset = Math.max(24, Math.min(58, window.innerWidth * 0.04));
  this.context.dataset.layoutMode = 'bottom-left';
  this.context.style.setProperty(
    '--cockpit-context-left',
    `${desktopInset.toFixed(1)}px`,
  );
  this.context.style.removeProperty('--cockpit-context-top');
  this.context.style.removeProperty('--cockpit-context-max-height');
}

export function syncSignalLayout() {
  if (!this.signalStream || this.signalStream.hidden) return;
  const utilityControls = document.getElementById('cockpit-utility-controls');
  if (window.matchMedia('(max-width: 760px)').matches) {
    this.signalStream.dataset.layoutMode = 'compact-top';
    utilityControls?.classList.remove('layout-primary-only');
    utilityControls
      ?.querySelectorAll('.cockpit-utility-control')
      .forEach((control) => {
        const hiddenSibling = Boolean(
          utilityControls.querySelector(
            '.cockpit-utility-control.is-expanded',
          ) && !control.classList.contains('is-expanded'),
        );
        control.setAttribute('aria-hidden', String(hiddenSibling));
      });
    this.hud?.style.removeProperty('--cockpit-utility-top');
    this.hud?.style.removeProperty('--cockpit-utility-max-height');
    this.hud?.style.removeProperty('--cockpit-utility-expanded-max-height');
    this.signalStream.style.removeProperty('--cockpit-signal-right');
    this.signalStream.style.removeProperty('--cockpit-signal-top');
    this.signalStream.style.removeProperty('--cockpit-signal-max-height');
    return;
  }

  const desktopInset = Math.max(24, Math.min(58, window.innerWidth * 0.04));
  this.signalStream.dataset.layoutMode = 'bottom-right';
  this.signalStream.style.setProperty(
    '--cockpit-signal-right',
    `${desktopInset.toFixed(1)}px`,
  );
  this.signalStream.style.removeProperty('--cockpit-signal-top');
  this.signalStream.style.removeProperty('--cockpit-signal-max-height');
  const signalBounds = this.signalStream.getBoundingClientRect();
  const utilityBounds = utilityControls?.getBoundingClientRect();
  if (utilityBounds) {
    const expandedControl = utilityControls?.querySelector(
      '.cockpit-utility-control.is-expanded',
    );
    const collapsedControl = utilityControls?.querySelector(
      '.cockpit-utility-control:not(.is-expanded)',
    );
    const collapsedLauncher = collapsedControl?.querySelector(
      '.cockpit-utility-launcher',
    );
    const expandedHeight = expandedControl
      ? Math.max(
          expandedControl.scrollHeight,
          expandedControl.getBoundingClientRect().height,
        )
      : 0;
    const collapsedHeight = collapsedLauncher
      ? Math.max(
          COCKPIT_UTILITY_LAUNCHER_MIN_HEIGHT_PX,
          collapsedLauncher.scrollHeight,
        )
      : 0;
    // Cockpit owns this anchor outright. The strip used to inherit the left
    // accordion's committed top, which is solved against left-lane obstacles
    // and dropped the strip straight through the briefing card below it.
    // The readout only anchors the strip while it is genuinely on screen:
    // the Minimal variant drops it with `display:none`, but HUD Off hides the
    // whole Intel HUD with `visibility`/`opacity`, which keeps its rect.
    const recReadout = document.querySelector('#intel-hud .hud-top-right');
    const recBounds = isRenderedOnScreen(recReadout)
      ? recReadout.getBoundingClientRect()
      : null;
    const utilityAnchor = resolveCockpitUtilityAnchor({
      recBottom: recBounds ? recBounds.bottom : 0,
      signalTop: signalBounds.top,
      stripHeight: utilityBounds.height,
      viewportHeight: window.innerHeight,
      collapsedHeight,
      recGap: COCKPIT_UTILITY_REC_GAP_PX,
      signalGap: COCKPIT_UTILITY_SIGNAL_GAP_PX,
      minTopFloor: COCKPIT_UTILITY_MIN_TOP_PX,
      minTopRatio: COCKPIT_UTILITY_MIN_TOP_RATIO,
    });
    const availableHeight = utilityAnchor.maxHeight;
    this.hud?.style.setProperty(
      '--cockpit-utility-top',
      `${utilityAnchor.top.toFixed(1)}px`,
    );
    this.hud?.style.setProperty(
      '--cockpit-utility-max-height',
      `${availableHeight.toFixed(2)}px`,
    );
    const utilityLayout =
      expandedControl && collapsedControl
        ? resolveCockpitUtilityLayout({
            availableHeight,
            expandedHeight,
            collapsedHeight,
          })
        : { primaryOnly: false, expandedMaxHeight: availableHeight };
    utilityControls?.classList.toggle(
      'layout-primary-only',
      utilityLayout.primaryOnly,
    );
    this.hud?.style.setProperty(
      '--cockpit-utility-expanded-max-height',
      `${utilityLayout.expandedMaxHeight.toFixed(2)}px`,
    );
    utilityControls
      ?.querySelectorAll('.cockpit-utility-control')
      .forEach((control) => {
        const hiddenSibling =
          utilityLayout.primaryOnly && control === collapsedControl;
        control.setAttribute('aria-hidden', String(hiddenSibling));
        if (hiddenSibling && control.contains(document.activeElement)) {
          expandedControl
            ?.querySelector('.cockpit-utility-glyph')
            ?.focus({ preventScroll: true });
        }
      });
  }
}