/**
 * Content script Momento — sélection live, surlignage, communication avec le side panel.
 * Injecté automatiquement sur http(s) ; ré-injecté à la demande si l’onglet était déjà ouvert.
 */
;(function initMementoClipperContent() {
  if (globalThis.__mementoClipperContent) return
  globalThis.__mementoClipperContent = true

  const HIGHLIGHT_ID = 'memento-clipper-highlight-root'
  const BANNER_ID = 'memento-clipper-banner-root'
  const STYLE_ID = 'memento-clipper-styles'

  let pickMode = false
  let debounceTimer = null

  function getSelectionText() {
    return window.getSelection()?.toString().trim() || ''
  }

  function getPageMeta() {
    const dir =
      document.documentElement.getAttribute('dir') ||
      document.body?.getAttribute('dir') ||
      ''
    const lang = (
      document.documentElement.getAttribute('lang') ||
      document.body?.getAttribute('lang') ||
      ''
    ).split('-')[0]
    return {
      text: getSelectionText(),
      dir,
      lang,
      url: location.href,
      title: document.title,
    }
  }

  function broadcastSelection() {
    clearTimeout(debounceTimer)
    debounceTimer = setTimeout(() => {
      const payload = { type: 'SELECTION_CHANGED', ...getPageMeta() }
      try {
        chrome.runtime.sendMessage(payload).catch(() => {})
      } catch {
        /* ignore */
      }
      if (pickMode) paintHighlight()
    }, 80)
  }

  function removeHighlight() {
    document.getElementById(HIGHLIGHT_ID)?.remove()
  }

  function paintHighlight() {
    removeHighlight()
    const sel = window.getSelection()
    if (!sel || sel.isCollapsed || !sel.rangeCount) return

    let range
    try {
      range = sel.getRangeAt(0)
    } catch {
      return
    }

    const host = document.createElement('div')
    host.id = HIGHLIGHT_ID
    host.setAttribute('aria-hidden', 'true')
    host.style.cssText =
      'position:fixed;inset:0;pointer-events:none;z-index:2147483644;overflow:hidden;'

    for (const rect of range.getClientRects()) {
      if (rect.width < 2 || rect.height < 2) continue
      const box = document.createElement('div')
      box.style.cssText = [
        'position:fixed',
        `left:${rect.left - 2}px`,
        `top:${rect.top - 1}px`,
        `width:${rect.width + 4}px`,
        `height:${rect.height + 2}px`,
        'background:rgba(164,113,72,0.28)',
        'border-radius:3px',
        'box-shadow:0 0 0 1px rgba(164,113,72,0.35)',
        'transition:opacity 0.15s ease',
      ].join(';')
      host.appendChild(box)
    }

    if (host.childNodes.length) document.documentElement.appendChild(host)
  }

  function ensureStyles() {
    if (document.getElementById(STYLE_ID)) return
    const style = document.createElement('style')
    style.id = STYLE_ID
    style.textContent = `
      html.memento-clipper-pick ::selection {
        background: rgba(164, 113, 72, 0.45) !important;
        color: inherit !important;
      }
      html.memento-clipper-pick {
        scroll-behavior: auto;
      }
    `
    document.documentElement.appendChild(style)
  }

  function removeBanner() {
    document.getElementById(BANNER_ID)?.remove()
  }

  function ensureBanner() {
    if (document.getElementById(BANNER_ID)) return

    const host = document.createElement('div')
    host.id = BANNER_ID
    host.style.cssText =
      'all:initial;position:fixed;top:16px;left:50%;transform:translateX(-50%);z-index:2147483647;pointer-events:none;font-family:Inter,system-ui,sans-serif;'

    const shadow = host.attachShadow({ mode: 'open' })
    shadow.innerHTML = `
      <style>
        .pill {
          display: flex; align-items: center; gap: 10px;
          padding: 10px 18px; border-radius: 999px;
          background: #1c1c1c; color: #faf9f5;
          box-shadow: 0 12px 32px rgba(0,0,0,0.22);
          font-size: 12px; font-weight: 600;
          letter-spacing: 0.02em;
          animation: slideIn 0.35s cubic-bezier(0.22,1,0.36,1);
        }
        .logo {
          width: 22px; height: 22px; border-radius: 7px;
          background: #faf9f5; color: #1c1c1c;
          display: flex; align-items: center; justify-content: center;
          font-family: Georgia, serif; font-weight: 900; font-size: 12px;
        }
        .dot {
          width: 8px; height: 8px; border-radius: 50%;
          background: #a47148; animation: pulse 1.2s ease infinite;
        }
        @keyframes slideIn {
          from { opacity: 0; transform: translateY(-8px); }
          to { opacity: 1; transform: translateY(0); }
        }
        @keyframes pulse {
          0%, 100% { opacity: 1; transform: scale(1); }
          50% { opacity: 0.5; transform: scale(0.85); }
        }
      </style>
      <div class="pill">
        <span class="logo">M</span>
        <span class="dot"></span>
        <span>Surlignez le texte à clipper</span>
      </div>
    `
    document.documentElement.appendChild(host)
  }

  function setPickMode(enabled) {
    pickMode = !!enabled
    ensureStyles()
    if (pickMode) {
      document.documentElement.classList.add('memento-clipper-pick')
      ensureBanner()
      paintHighlight()
    } else {
      document.documentElement.classList.remove('memento-clipper-pick')
      removeBanner()
      removeHighlight()
    }
  }

  function onScrollOrResize() {
    if (pickMode) paintHighlight()
  }

  document.addEventListener('selectionchange', broadcastSelection)
  document.addEventListener('mouseup', broadcastSelection)
  document.addEventListener('keyup', broadcastSelection)
  window.addEventListener('scroll', onScrollOrResize, { passive: true, capture: true })
  window.addEventListener('resize', onScrollOrResize, { passive: true })

  chrome.runtime.onMessage.addListener((message, _sender, sendResponse) => {
    if (message?.type === 'PING') {
      sendResponse({ ok: true })
      return true
    }
    if (message?.type === 'GET_CONTEXT') {
      sendResponse({
        html: document.documentElement.outerHTML,
        ...getPageMeta(),
      })
      return true
    }
    if (message?.type === 'SET_PICK_MODE') {
      setPickMode(!!message.enabled)
      sendResponse({ ok: true, pickMode })
      return true
    }
    return false
  })

  broadcastSelection()
})()