import { app } from "/scripts/app.js";
import { applyAdaptiveCanvasOnly } from "../shared/nodes2.mjs";

const COMFY_CLASS = "DumasH3BeatPrompt";
const HIDDEN_INPUT_NAME = "H3BeatPromptState";
const MIN_W = 420;
const DEFAULT_W = 520;
const DEFAULT_H = 340;
const DEFAULT_BEAT = "Describe this beat.";
const STATE_PROPERTY = "dumas_h3_beat_prompt_state";
const DIRECTIVE_EXAMPLES = [
  ["wardrobe set", "wardrobe: Maya = grey shorts, red jacket"],
  ["wardrobe add", "wardrobe: Maya += red jacket"],
  ["wardrobe remove", "wardrobe: Maya -= red jacket"],
  ["seconds", "seconds: 8"],
  ["exit", "exit: Maya"],
  ["enter", "enter: Jon"],
  ["overall_soundscape", "overall_soundscape: soft rain, distant traffic"],
  ["non_diegetic_music", "non_diegetic_music: tense analog synth pulse"],
  ["soundscape", "soundscape: fluorescent room tone, faint HVAC hum"],
  ["music", "music: low ominous cello and sparse percussion"],
];

function injectCSS() {
  if (document.getElementById("dumas-h3-beat-prompt-css")) return;
  const style = document.createElement("style");
  style.id = "dumas-h3-beat-prompt-css";
  style.textContent = `
    .dh3bp-root {
      box-sizing: border-box;
      width: 100%;
      color: #e8e8e8;
      font: 12px/1.35 "Segoe UI", sans-serif;
      padding: 8px 10px 10px;
    }
    .dh3bp-toolbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
    }
    .dh3bp-title {
      font-size: 12px;
      font-weight: 600;
      color: #f0f0f0;
    }
    .dh3bp-subtitle {
      color: #9da3ae;
      font-size: 11px;
    }
    .dh3bp-add {
      background: #e66a2c;
      color: #fff;
      border: 1px solid #f28b57;
      border-radius: 7px;
      padding: 6px 10px;
      cursor: pointer;
      font-weight: 600;
    }
    .dh3bp-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .dh3bp-beat {
      background: #1e2025;
      border: 1px solid #363a42;
      border-radius: 10px;
      padding: 10px;
      box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
    }
    .dh3bp-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }
    .dh3bp-label {
      color: #f3f4f6;
      font-size: 12px;
      font-weight: 600;
    }
    .dh3bp-remove {
      background: transparent;
      color: #f59a9a;
      border: 1px solid #5a2c2c;
      border-radius: 6px;
      padding: 4px 8px;
      cursor: pointer;
      font-size: 11px;
    }
    .dh3bp-remove:disabled {
      opacity: 0.45;
      cursor: default;
    }
    .dh3bp-text {
      width: 100%;
      min-height: 96px;
      resize: vertical;
      box-sizing: border-box;
      background: #121418;
      color: #e8e8e8;
      border: 1px solid #3c414a;
      border-radius: 8px;
      padding: 8px 10px;
      font: 12px/1.4 "Consolas", "SFMono-Regular", monospace;
      margin-bottom: 8px;
    }
    .dh3bp-directives {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .dh3bp-directive {
      background: #252a33;
      color: #d4d9e1;
      border: 1px solid #414754;
      border-radius: 999px;
      padding: 4px 8px;
      cursor: pointer;
      font-size: 11px;
      line-height: 1.2;
    }
    .dh3bp-directive:hover,
    .dh3bp-remove:hover,
    .dh3bp-add:hover {
      filter: brightness(1.08);
    }
  `;
  document.head.appendChild(style);
}

function defaultState() {
  return { beats: [{ text: DEFAULT_BEAT }] };
}

function normalizeState(value) {
  let parsed = value;
  if (typeof parsed === "string") {
    try {
      parsed = JSON.parse(parsed);
    } catch (_error) {
      parsed = null;
    }
  }
  if (!parsed || typeof parsed !== "object") return defaultState();
  const beats = Array.isArray(parsed.beats) ? parsed.beats : [];
  const normalized = beats.map((beat) => ({
    text: typeof beat?.text === "string" ? beat.text : String(beat?.text || ""),
  }));
  return normalized.length ? { beats: normalized } : defaultState();
}

function readState(node) {
  return normalizeState(
    node._dh3bpState
      || findWidget(node, HIDDEN_INPUT_NAME)?.value
      || node.properties?.[STATE_PROPERTY]
      || ""
  );
}

function findWidget(node, name) {
  return (node.widgets || []).find((widget) => widget?.name === name);
}

function hideWidget(node, name) {
  const widget = findWidget(node, name);
  if (!widget) return;
  widget.type = "hidden";
  widget.computeSize = () => [0, 0];
}

function writeState(node, state) {
  const normalized = normalizeState(state);
  const serialized = JSON.stringify(normalized);
  node._dh3bpState = serialized;
  node.properties = node.properties || {};
  node.properties[STATE_PROPERTY] = serialized;
  const widget = findWidget(node, HIDDEN_INPUT_NAME);
  if (widget) widget.value = serialized;
}

function syncStateFromNode(node) {
  const widgetValue = findWidget(node, HIDDEN_INPUT_NAME)?.value;
  const propertyValue = node.properties?.[STATE_PROPERTY];
  const source = node._dh3bpState || widgetValue || propertyValue || "";
  writeState(node, source);
}

function updateTextareaHeight(textarea) {
  textarea.style.height = "auto";
  textarea.style.height = `${Math.max(96, textarea.scrollHeight)}px`;
}

function appendDirectiveText(currentText, example) {
  const trimmed = String(currentText || "").replace(/\s+$/, "");
  if (!trimmed) return example;
  if (trimmed.includes(example)) return trimmed;
  return `${trimmed}\n${example}`;
}

function renderUI(node) {
  const ui = node._dh3bpUI;
  if (!ui) return;

  const state = readState(node);
  ui.list.innerHTML = "";

  state.beats.forEach((beat, index) => {
    const card = document.createElement("div");
    card.className = "dh3bp-beat";

    const head = document.createElement("div");
    head.className = "dh3bp-head";

    const label = document.createElement("div");
    label.className = "dh3bp-label";
    label.textContent = `Beat ${index + 1}`;

    const remove = document.createElement("button");
    remove.className = "dh3bp-remove";
    remove.type = "button";
    remove.textContent = "Remove";
    remove.disabled = state.beats.length <= 1;
    remove.addEventListener("click", () => {
      const next = readState(node);
      next.beats.splice(index, 1);
      writeState(node, next);
      renderUI(node);
    });

    head.append(label, remove);

    const textarea = document.createElement("textarea");
    textarea.className = "dh3bp-text";
    textarea.placeholder = "Describe this beat...";
    textarea.value = beat.text || "";
    textarea.addEventListener("input", () => {
      const next = readState(node);
      next.beats[index].text = textarea.value;
      writeState(node, next);
      updateTextareaHeight(textarea);
    });
    textarea.addEventListener("keydown", (event) => event.stopImmediatePropagation());

    const directives = document.createElement("div");
    directives.className = "dh3bp-directives";

    DIRECTIVE_EXAMPLES.forEach(([labelText, example]) => {
      const button = document.createElement("button");
      button.className = "dh3bp-directive";
      button.type = "button";
      button.textContent = labelText;
      button.title = example;
      button.addEventListener("click", () => {
        const next = readState(node);
        next.beats[index].text = appendDirectiveText(next.beats[index].text, example);
        writeState(node, next);
        renderUI(node);
      });
      directives.appendChild(button);
    });

    card.append(head, textarea, directives);
    ui.list.appendChild(card);
    updateTextareaHeight(textarea);
  });

  node.setDirtyCanvas?.(true, true);
}

function setupNode(node) {
  injectCSS();
  hideWidget(node, HIDDEN_INPUT_NAME);

  const root = document.createElement("div");
  root.className = "dh3bp-root";

  const toolbar = document.createElement("div");
  toolbar.className = "dh3bp-toolbar";

  const titleWrap = document.createElement("div");
  const title = document.createElement("div");
  title.className = "dh3bp-title";
  title.textContent = "Beat Prompt Builder";
  const subtitle = document.createElement("div");
  subtitle.className = "dh3bp-subtitle";
  subtitle.textContent = "One textbox per H3 beat. Use the buttons for seconds and quick wardrobe set/add/remove syntax.";
  titleWrap.append(title, subtitle);

  const addButton = document.createElement("button");
  addButton.className = "dh3bp-add";
  addButton.type = "button";
  addButton.textContent = "+ Add Beat";
  addButton.addEventListener("click", () => {
    const next = readState(node);
    next.beats.push({ text: "" });
    writeState(node, next);
    renderUI(node);
  });

  toolbar.append(titleWrap, addButton);

  const list = document.createElement("div");
  list.className = "dh3bp-list";

  root.append(toolbar, list);

  node._dh3bpUI = { root, list };
  const widget = node.addDOMWidget("dumas_h3_beat_prompt", "custom", root, {
    getValue: () => null,
    setValue: () => {},
    serialize: false,
    getMinHeight: () => 180,
  });
  widget.computeLayoutSize = () => ({ minHeight: 180, minWidth: 1 });
  applyAdaptiveCanvasOnly(widget);

  node.size[0] = Math.max(node.size[0] || 0, DEFAULT_W);
  node.size[1] = Math.max(node.size[1] || 0, DEFAULT_H);

  syncStateFromNode(node);
  renderUI(node);
}

function collectNodes(graph, out) {
  if (!graph) return;
  const nodes = graph._nodes || graph.nodes || [];
  for (const node of nodes) {
    if (node?.comfyClass === COMFY_CLASS) out.push(node);
    const inner = node?.subgraph || node?.graph || node?._graph;
    if (inner && inner !== graph) collectNodes(inner, out);
  }
}

function matchNode(nodes, promptId) {
  let node = nodes.find((entry) => String(entry.id) === String(promptId));
  if (node) return node;
  const tail = String(promptId).split(":").pop();
  return nodes.find((entry) => String(entry.id) === tail) || null;
}

function injectState(result) {
  const output = result?.output;
  if (!output) return;
  const nodes = [];
  collectNodes(app.graph, nodes);
  for (const id in output) {
    const entry = output[id];
    if (!entry || entry.class_type !== COMFY_CLASS) continue;
    const node = matchNode(nodes, id);
    if (!node) continue;
    if (!entry.inputs) entry.inputs = {};
    entry.inputs[HIDDEN_INPUT_NAME] = node._dh3bpState || JSON.stringify(defaultState());
  }
}

function installGraphToPromptHook() {
  if (app._dh3bpGraphPatched) return;
  app._dh3bpGraphPatched = true;
  const original = app.graphToPrompt.bind(app);
  app.graphToPrompt = async function graphToPromptPatched(...args) {
    const result = await original(...args);
    injectState(result);
    return result;
  };
}

app.registerExtension({
  name: "Dumas.H3BeatPrompt",
  setup() {
    installGraphToPromptHook();
  },
  async beforeRegisterNodeDef(nodeType, nodeData) {
    if (nodeData?.name !== COMFY_CLASS) return;

    const originalNodeCreated = nodeType.prototype.onNodeCreated;
    nodeType.prototype.onNodeCreated = function onNodeCreated() {
      const result = originalNodeCreated?.apply(this, arguments);
      setupNode(this);
      return result;
    };

    const originalConfigure = nodeType.prototype.onConfigure;
    nodeType.prototype.onConfigure = function onConfigure() {
      const result = originalConfigure?.apply(this, arguments);
      syncStateFromNode(this);
      queueMicrotask(() => renderUI(this));
      return result;
    };

    const originalSerialize = nodeType.prototype.onSerialize;
    nodeType.prototype.onSerialize = function onSerialize(o) {
      syncStateFromNode(this);
      const result = originalSerialize?.apply(this, arguments);
      if (o && this.properties?.[STATE_PROPERTY]) {
        o.properties = o.properties || {};
        o.properties[STATE_PROPERTY] = this.properties[STATE_PROPERTY];
      }
      queueMicrotask(() => renderUI(this));
      return result;
    };

    const originalDrawForeground = nodeType.prototype.onDrawForeground;
    nodeType.prototype.onDrawForeground = function onDrawForeground(ctx) {
      const result = originalDrawForeground?.call(this, ctx);
      this.size[0] = Math.max(this.size[0], MIN_W);
      return result;
    };
  },
});