{% extends "base.html" %}
{% block title %}{% if device %}Edit Device – {{ device.name }}{% else %}Add Device{% endif %}{% endblock %}

{% block content %}
<nav aria-label="breadcrumb" class="mb-3">
  <ol class="breadcrumb">
    <li class="breadcrumb-item"><a href="{{ url_for('devices.list_devices') }}">Devices</a></li>
    <li class="breadcrumb-item active">
      {% if device %}Edit – {{ device.name }}{% else %}Add Device{% endif %}
    </li>
  </ol>
</nav>

<h2 class="fw-bold mb-1">
  <i class="bi bi-hdd-stack me-2 text-info"></i>
  {% if device %}Edit Device{% else %}Add Device{% endif %}
</h2>
<p class="text-secondary mb-4">
  Give your device a name and map it to a relay or sensor channel on one of your boards.
  Once mapped, toggling the device will control the physical hardware.
</p>

<form method="POST" id="deviceForm">

  <!-- Hidden binding fields submitted with the form -->
  <input type="hidden" id="hBoardId"    name="board_id"    value="{{ device.board_id if device and device.board_id else '' }}" />
  <input type="hidden" id="hEntityType" name="entity_type" value="{{ device.entity_type if device and device.entity_type else '' }}" />
  <input type="hidden" id="hEntityNum"  name="entity_num"  value="{{ device.entity_num if device and device.entity_num else '' }}" />

<div class="row g-4">

  <!-- ══════════════════ LEFT: identity + icon + type ══════════════════════ -->
  <div class="col-lg-4">

    <!-- Identity -->
    <div class="card border-0 rounded-4 mb-4">
      <div class="card-body p-4">
        <h5 class="fw-semibold mb-3"><i class="bi bi-tag me-1 text-info"></i> Identity</h5>

        <div class="mb-3">
          <label class="form-label" for="name">Device name <span class="text-danger">*</span></label>
          <input type="text" class="form-control" id="name" name="name"
                 value="{{ device.name if device else '' }}"
                 placeholder="e.g. Outdoor Light 1 – Courtyard"
                 maxlength="128" required />
        </div>

        <div class="mb-3">
          <label class="form-label" for="description">Description <span class="text-secondary small">(optional)</span></label>
          <input type="text" class="form-control" id="description" name="description"
                 value="{{ device.description if device and device.description else '' }}"
                 placeholder="Short description" maxlength="256" />
        </div>

        <div class="mb-0">
          <label class="form-label" for="area">Area / Location <span class="text-secondary small">(optional)</span></label>
          <input type="text" class="form-control" id="area" name="area"
                 value="{{ device.area if device and device.area else '' }}"
                 placeholder="e.g. Courtyard, Living Room, Garage"
                 maxlength="64" />
        </div>
      </div>
    </div>

    <!-- Device type -->
    <div class="card border-0 rounded-4 mb-4">
      <div class="card-body p-4">
        <h5 class="fw-semibold mb-3"><i class="bi bi-grid-3x3-gap me-1 text-success"></i> Device Type</h5>
        <p class="text-secondary small mb-3">Sets default icon, state labels and colours. Auto-filled when you pick a channel.</p>

        <div id="relay-types-wrap">
          <div class="d-flex flex-wrap gap-2">
            {% for tkey, tdef in relay_types.items() %}
            <label class="entity-type-pill" title="{{ tdef.label }}" data-icon="{{ tdef.icon }}">
              <input type="radio" name="device_class" value="{{ tkey }}" hidden
                     {% if (device and device.device_class == tkey) or (not device and tkey == 'switch') %}checked{% endif %} />
              <i class="bi {{ tdef.icon }}"></i>
              <span>{{ tdef.label }}</span>
            </label>
            {% endfor %}
          </div>
        </div>

        <div id="input-types-wrap" style="display:none">
          <div class="d-flex flex-wrap gap-2">
            {% for tkey, tdef in input_types.items() %}
            <label class="entity-type-pill" title="{{ tdef.label }}" data-icon="{{ tdef.icon }}">
              <input type="radio" name="device_class" value="{{ tkey }}" hidden
                     {% if device and device.device_class == tkey and device.entity_type == 'input' %}checked{% endif %} />
              <i class="bi {{ tdef.icon }}"></i>
              <span>{{ tdef.label }}</span>
            </label>
            {% endfor %}
          </div>
        </div>
      </div>
    </div>

    <!-- Custom icon -->
    <div class="card border-0 rounded-4">
      <div class="card-body p-4">
        <h5 class="fw-semibold mb-3"><i class="bi bi-palette me-1 text-warning"></i> Custom Icon</h5>

        <div class="d-flex align-items-center gap-3 mb-3">
          <div class="rounded-3 d-flex align-items-center justify-content-center flex-shrink-0"
               style="width:60px;height:60px;background:var(--bs-secondary-bg)">
            <i id="icon-preview" class="bi {{ (device.icon or device.effective_icon) if device else 'bi-toggles' }}"
               style="font-size:2rem"></i>
          </div>
          <div class="flex-grow-1">
            <div class="input-group input-group-sm">
              <span class="input-group-text"><i class="bi bi-search"></i></span>
              <input type="text" class="form-control" id="iconInput" name="icon"
                     value="{{ device.icon if device and device.icon else '' }}"
                     placeholder="bi-lightbulb-fill" />
              <button type="button" class="btn btn-outline-secondary" id="iconClearBtn"><i class="bi bi-x"></i></button>
            </div>
            <div class="form-text">Leave blank to use device type default.</div>
          </div>
        </div>

        <div class="d-flex flex-wrap gap-1" id="iconPalette">
          {% for icon_cls, icon_name in icon_palette %}
          <button type="button" class="btn btn-sm btn-outline-secondary p-1"
                  title="{{ icon_name }}" data-icon="{{ icon_cls }}">
            <i class="bi {{ icon_cls }}" style="font-size:1.1rem"></i>
          </button>
          {% endfor %}
        </div>
      </div>
    </div>

  </div>

  <!-- ══════════════════ RIGHT: board + entity card picker ═════════════════ -->
  <div class="col-lg-8">
    <div class="card border-0 rounded-4">
      <div class="card-body p-4">
        <h5 class="fw-semibold mb-1">
          <i class="bi bi-motherboard me-1 text-primary"></i> Board &amp; Channel Binding
        </h5>
        <p class="text-secondary small mb-4">
          Select a board, then click the relay or sensor you want to bind to this device.
          Toggling the device later will directly control the physical hardware.
        </p>

        <!-- Board selector -->
        <div class="mb-4">
          <label class="form-label fw-semibold" for="boardSelect">Board</label>
          <select class="form-select" id="boardSelect">
            <option value="">— None (virtual / unlinked device) —</option>
            {% for board in boards %}
            <option value="{{ board.id }}" data-name="{{ board.name }}"
              {% if device and device.board_id == board.id %}selected{% endif %}>
              {{ board.name }}  ·  {{ board.board_type }}
            </option>
            {% endfor %}
          </select>
        </div>

        <!-- Entity panel -->
        <div id="entityPanel">

          <div id="entityLoading" class="text-center py-4 text-secondary" style="display:none">
            <div class="spinner-border spinner-border-sm me-2"></div>Loading channels…
          </div>

          <div id="entityPlaceholder" class="text-center py-5 text-secondary">
            <i class="bi bi-arrow-up-circle display-5 d-block mb-2 opacity-25"></i>
            Select a board above to see its relay and sensor channels.
          </div>

          <!-- Relays -->
          <div id="relaySection" style="display:none">
            <div class="d-flex align-items-center mb-2">
              <i class="bi bi-lightning-charge text-warning me-2"></i>
              <span class="fw-semibold">Relay Outputs</span>
              <span class="badge text-bg-secondary ms-2" id="relayCount"></span>
              <span class="text-secondary small ms-2">– controllable (ON / OFF)</span>
            </div>
            <div class="row g-2 mb-4" id="relayGrid"></div>
          </div>

          <!-- Inputs -->
          <div id="inputSection" style="display:none">
            <div class="d-flex align-items-center mb-2">
              <i class="bi bi-arrow-down-circle text-success me-2"></i>
              <span class="fw-semibold">Digital Inputs / Sensors</span>
              <span class="badge text-bg-secondary ms-2" id="inputCount"></span>
              <span class="text-secondary small ms-2">– read-only</span>
            </div>
            <div class="row g-2" id="inputGrid"></div>
          </div>

          <!-- Selection summary -->
          <div id="bindSummary" class="alert alert-info d-flex align-items-center gap-3 mt-3" style="display:none">
            <i class="bi bi-check-circle-fill fs-5"></i>
            <div><strong>Bound to:</strong> <span id="bindSummaryText"></span></div>
            <button type="button" class="btn btn-sm btn-outline-secondary ms-auto" id="unbindBtn">
              <i class="bi bi-x me-1"></i>Remove binding
            </button>
          </div>

        </div>
      </div>
    </div>
  </div>

</div><!-- /row -->

<!-- ── Submit ────────────────────────────────────────────────────────────── -->
<div class="d-flex gap-2 mt-4">
  <button type="submit" class="btn btn-primary">
    <i class="bi bi-check-circle me-1"></i>
    {% if device %}Save Changes{% else %}Create Device{% endif %}
  </button>
  <a href="{{ url_for('devices.list_devices') }}" class="btn btn-outline-secondary">
    <i class="bi bi-x me-1"></i>Cancel
  </a>
</div>

</form>
{% endblock %}

{% block scripts %}
<script>
(function () {
  const INIT = {
    boardId:    {{ (device.board_id | tojson)    if device and device.board_id    else 'null' }},
    entityType: {{ (device.entity_type | tojson) if device and device.entity_type else 'null' }},
    entityNum:  {{ (device.entity_num | tojson)  if device and device.entity_num  else 'null' }},
    devClass:   {{ (device.device_class | tojson) if device else '"switch"' }},
  };

  // DOM refs
  const boardSel       = document.getElementById("boardSelect");
  const hBoardId       = document.getElementById("hBoardId");
  const hEntityType    = document.getElementById("hEntityType");
  const hEntityNum     = document.getElementById("hEntityNum");
  const entityLoading  = document.getElementById("entityLoading");
  const entityPh       = document.getElementById("entityPlaceholder");
  const relaySection   = document.getElementById("relaySection");
  const inputSection   = document.getElementById("inputSection");
  const relayGrid      = document.getElementById("relayGrid");
  const inputGrid      = document.getElementById("inputGrid");
  const relayCount     = document.getElementById("relayCount");
  const inputCount     = document.getElementById("inputCount");
  const bindSummary    = document.getElementById("bindSummary");
  const bindSummaryTxt = document.getElementById("bindSummaryText");
  const unbindBtn      = document.getElementById("unbindBtn");
  const iconInput      = document.getElementById("iconInput");
  const iconPreview    = document.getElementById("icon-preview");
  const iconClearBtn   = document.getElementById("iconClearBtn");
  const relayTypesWrap = document.getElementById("relay-types-wrap");
  const inputTypesWrap = document.getElementById("input-types-wrap");

  // ── icon preview ─────────────────────────────────────────────────────────
  function updateIconPreview() {
    const val = iconInput.value.trim();
    if (val) { iconPreview.className = "bi " + val; return; }
    const checked = document.querySelector(
      "#relay-types-wrap input[name=device_class]:checked, " +
      "#input-types-wrap input[name=device_class]:checked"
    );
    if (checked) {
      const lbl = checked.closest("label");
      if (lbl) iconPreview.className = "bi " + lbl.dataset.icon;
    }
  }

  iconInput.addEventListener("input", updateIconPreview);
  iconClearBtn.addEventListener("click", () => { iconInput.value = ""; updateIconPreview(); });
  document.getElementById("iconPalette").addEventListener("click", e => {
    const btn = e.target.closest("[data-icon]");
    if (!btn) return;
    iconInput.value = btn.dataset.icon;
    updateIconPreview();
  });
  document.querySelectorAll("label.entity-type-pill input").forEach(r =>
    r.addEventListener("change", updateIconPreview)
  );

  // ── device type tab switch ────────────────────────────────────────────────
  function showRelayTypes(preselect) {
    relayTypesWrap.style.display = "";
    inputTypesWrap.style.display = "none";
    inputTypesWrap.querySelectorAll("input").forEach(r => r.checked = false);
    if (preselect) {
      const m = relayTypesWrap.querySelector(`input[value="${preselect}"]`);
      if (m) m.checked = true;
    }
    if (!relayTypesWrap.querySelector("input:checked")) {
      const f = relayTypesWrap.querySelector("input"); if (f) f.checked = true;
    }
    updateIconPreview();
  }

  function showInputTypes(preselect) {
    inputTypesWrap.style.display = "";
    relayTypesWrap.style.display = "none";
    relayTypesWrap.querySelectorAll("input").forEach(r => r.checked = false);
    if (preselect) {
      const m = inputTypesWrap.querySelector(`input[value="${preselect}"]`);
      if (m) m.checked = true;
    }
    if (!inputTypesWrap.querySelector("input:checked")) {
      const f = inputTypesWrap.querySelector("input"); if (f) f.checked = true;
    }
    updateIconPreview();
  }

  // ── entity card factory ──────────────────────────────────────────────────
  function makeCard(item, kind) {
    const isSelected = hEntityType.value === kind && parseInt(hEntityNum.value) === item.num;
    const stateColor = kind === "relay"
      ? (item.state  ? item.on_color  : item.off_color)
      : (item.active ? item.active_color : item.idle_color);
    const label      = kind === "relay" ? "Relay" : "Input";

    const col = document.createElement("div");
    col.className = "col-6 col-md-4 col-xl-3";
    col.innerHTML = `
      <div class="card entity-pick-card border-2 rounded-3 h-100
                  ${isSelected ? "border-primary bg-primary bg-opacity-10" : "border-transparent"}"
           style="cursor:pointer;transition:all .15s"
           data-kind="${kind}" data-num="${item.num}">
        <div class="card-body p-3 text-center">
          <div class="rounded-3 d-flex align-items-center justify-content-center mx-auto mb-2"
               style="width:48px;height:48px;background:var(--bs-secondary-bg)">
            <i class="bi ${item.icon} entity-card-icon"
               style="font-size:1.5rem;${isSelected ? "color:var(--bs-primary)" : ""}"></i>
          </div>
          <div class="fw-semibold small text-truncate" title="${item.name}">${item.name}</div>
          <div class="text-secondary" style="font-size:.7rem">${label} ${item.num}</div>
          <span class="badge text-bg-${stateColor} mt-1" style="font-size:.65rem">${item.state_label}</span>
          ${isSelected ? '<div class="mt-1"><i class="bi bi-check-circle-fill text-primary"></i></div>' : ''}
        </div>
      </div>`;

    col.querySelector(".entity-pick-card").addEventListener("click", () => selectEntity(item, kind));
    return col;
  }

  // ── select entity ─────────────────────────────────────────────────────────
  function selectEntity(item, kind) {
    hEntityType.value = kind;
    hEntityNum.value  = item.num;

    document.querySelectorAll(".entity-pick-card").forEach(c => {
      const mine = c.dataset.kind === kind && parseInt(c.dataset.num) === item.num;
      c.classList.toggle("border-primary", mine);
      c.classList.toggle("bg-primary",     mine);
      c.classList.toggle("bg-opacity-10",  mine);
      c.classList.toggle("border-transparent", !mine);
      c.classList.remove("bg-secondary");
      const ico = c.querySelector(".entity-card-icon");
      if (ico) ico.style.color = mine ? "var(--bs-primary)" : "";
      // show/hide checkmark
      let ck = c.querySelector(".entity-check");
      if (!ck && mine) {
        ck = document.createElement("div");
        ck.className = "entity-check mt-1";
        ck.innerHTML = '<i class="bi bi-check-circle-fill text-primary"></i>';
        c.querySelector(".card-body").appendChild(ck);
      } else if (ck && !mine) {
        ck.remove();
      }
    });

    kind === "relay" ? showRelayTypes(item.type) : showInputTypes(item.type);

    // Auto-fill name if blank
    const nameIn = document.getElementById("name");
    if (!nameIn.value.trim()) nameIn.value = item.name;

    // Summary banner
    const boardName = boardSel.options[boardSel.selectedIndex]?.dataset.name || "Board";
    bindSummaryTxt.textContent = `${boardName} · ${kind === "relay" ? "Relay" : "Input"} ${item.num} — ${item.name}`;
    bindSummary.style.display = "flex";
  }

  unbindBtn.addEventListener("click", () => {
    hEntityType.value = "";
    hEntityNum.value  = "";
    document.querySelectorAll(".entity-pick-card").forEach(c => {
      c.classList.remove("border-primary", "bg-primary", "bg-opacity-10");
      c.classList.add("border-transparent");
      const ico = c.querySelector(".entity-card-icon");
      if (ico) ico.style.color = "";
      c.querySelector(".entity-check")?.remove();
    });
    bindSummary.style.display = "none";
  });

  // ── load board ────────────────────────────────────────────────────────────
  function loadBoard(boardId) {
    entityPh.style.display     = "none";
    relaySection.style.display = "none";
    inputSection.style.display = "none";
    bindSummary.style.display  = "none";
    relayGrid.innerHTML        = "";
    inputGrid.innerHTML        = "";

    if (!boardId) {
      hBoardId.value = "";
      entityPh.style.display = "";
      return;
    }
    hBoardId.value = boardId;
    entityLoading.style.display = "";

    fetch(`/devices/api/boards/${boardId}/entities`)
      .then(r => r.json())
      .then(data => {
        entityLoading.style.display = "none";

        if (data.relays && data.relays.length) {
          relayCount.textContent = data.relays.length;
          data.relays.forEach(item => relayGrid.appendChild(makeCard(item, "relay")));
          relaySection.style.display = "";
        }
        if (data.inputs && data.inputs.length) {
          inputCount.textContent = data.inputs.length;
          data.inputs.forEach(item => inputGrid.appendChild(makeCard(item, "input")));
          inputSection.style.display = "";
        }
        if (!data.relays.length && !data.inputs.length) {
          entityPh.innerHTML = `<i class="bi bi-exclamation-circle display-5 d-block mb-2 opacity-25"></i>
            This board has no relay or input channels configured.`;
          entityPh.style.display = "";
        }

        // Restore selection when editing
        if (INIT.entityType && INIT.entityNum) {
          const all = INIT.entityType === "relay" ? data.relays : data.inputs;
          const match = all.find(i => i.num === INIT.entityNum);
          if (match) selectEntity(match, INIT.entityType);
        }
      })
      .catch(() => {
        entityLoading.style.display = "none";
        entityPh.innerHTML = `<i class="bi bi-exclamation-triangle text-warning me-2"></i>Failed to load board channels.`;
        entityPh.style.display = "";
      });
  }

  boardSel.addEventListener("change", () => {
    hEntityType.value = "";
    hEntityNum.value  = "";
    loadBoard(boardSel.value || null);
  });

  // ── init ─────────────────────────────────────────────────────────────────
  if (INIT.entityType === "input") {
    showInputTypes(INIT.devClass);
  } else {
    showRelayTypes(INIT.devClass);
  }
  updateIconPreview();

  if (INIT.boardId) {
    loadBoard(INIT.boardId);
  } else {
    entityPh.style.display = "";
  }
})();
</script>

<style>
.entity-pick-card:hover { background: var(--bs-secondary-bg) !important; transform: translateY(-2px); }
.border-transparent { border-color: transparent !important; }
</style>
{% endblock %}