// ==UserScript==
// @name         Danbooru Tag Autocompletion For Fooocus
// @namespace    http://tampermonkey.net/
// @version      2024-11-29
// @description  Tag autocompletion for fooocus
// @author       CTRN43062
// @match        https://*.gradio.live
// @match        http://127.0.0.1:7865
// @icon         https://www.google.com/s2/favicons?sz=64&domain=0.1
// @grant        GM_addStyle
// @license MIT
// @downloadURL https://update.greasyfork.icu/scripts/519023/Danbooru%20Tag%20Autocompletion%20For%20Fooocus.user.js
// @updateURL https://update.greasyfork.icu/scripts/519023/Danbooru%20Tag%20Autocompletion%20For%20Fooocus.meta.js
// ==/UserScript==

GM_addStyle(`
  .autocomplete-list {
    position: absolute;
    display: flex;
    background: #eeeeed;
    border-radius: 5px;
    z-index: 1123;
    max-height: 12rem;
    overflow: auto;
    bottom: 105%;
    left: 5px;
    width: 300px !important;
    min-width: fit-content;
  }

  .autocomplete-list div {
    line-height: 1.5rem;
    padding: 4px 10px;
    display: flex;
    justify-content: space-between;
  }

  .autocomplete-list div:nth-child(2n) {
    background: #ffffff;
  }

  .autocomplete-list div.active {
    background: #e5e7eb;
  }
 `);

/**
 * 从网络或者本地加载 tags 数据并返回
 *
 */

const CONFIG = {
  // [[textarea, parent]]
  selectors: [["#positive_prompt > label > textarea", "#component-11"]],
  first_n: 5,
};

class Tags {
  static TAG_FILES = {
    danbooru: {
      url: "https://raw.githubusercontent.com/DominikDoom/a1111-sd-webui-tagcomplete/refs/heads/main/tags/danbooru.csv",
      key: "danbooru",
    },
  };

  constructor() {
    this.save = true;

    Object.keys(Tags.TAG_FILES).forEach((key) => {
      this[`load${key.toUpperCase()}Tags`] = async () =>
        await this.loadTagsFromLocal(Tags.TAG_FILES[key].key);
    });
  }

  _csvTextToTagsItem(text) {
    const keys = ["name", "type", "count", "alias"];
    const result = [];

    for (const line of text.split("\n")) {
      const item = line.split(",");
      if (item.length < 3) {
        console.warn("Unknown csv format:", line);
        continue;
      }

      const obj = {};

      item.forEach((val, idx) => {
        obj[keys[idx]] = val;
      });

      result.push(obj);
    }

    return result;
  }

  saveTagsToLocal(key, tags) {
    localStorage.setItem(key, tags);
  }

  async loadTagsFromInternet(key) {
    const resp = await fetch(Tags.TAG_FILES[key].url);
    const text = await resp.text();
    return text;
  }

  async loadTagsFromLocal(key, update = false) {
    // 1girl,0,5882641,"1girls,sole_female"
    // name,type,count,alias
    let rawTags = localStorage.getItem(key);
    console.info("loading tags");
    if (!rawTags || update) {
      console.info("loading tags from web");
      rawTags = await this.loadTagsFromInternet(key);
      if (this.save) {
        this.saveTagsToLocal(key, rawTags);
      }
    }

    return this._csvTextToTagsItem(rawTags);
  }
}

class AutoCompleteList {
  constructor(doneCallback) {
    this.isShow = false;
    this.mounted = false;
    this.items = [];
    this.itemsEl = [];
    this.doneCallback = doneCallback;

    this.activeIndex = 0;
  }

  switchActive(idx) {
    this.itemsEl.forEach((item) => item.classList.remove("active"));
    this.itemsEl[idx].classList.add("active");
    // console.log(this.items[idx].name);
  }

  reset() {
    this.items = [];
    this.itemsEl = [];
    this.activeIndex = 0;
  }

  autocompleteDone() {
    if (typeof this.doneCallback !== "function") {
      throw Error("done callback must be a function");
    }

    this.doneCallback(this.items[this.activeIndex]);
    this.hide();
  }

  _initEvent() {
    const handlers = {
      ArrowDown: () => {
        if (this.activeIndex < this.items.length - 1) {
          this.activeIndex++;
          this.switchActive(this.activeIndex);
        }
      },
      ArrowUp: () => {
        if (this.activeIndex > 0) {
          this.activeIndex--;
          this.switchActive(this.activeIndex);
        }
      },
      Enter: () => {
        this.autocompleteDone();
      },
      Tab: () => {
        this.autocompleteDone();
      },
    };

    addEventListener("keydown", (e) => {
      const { key } = e;

      if (!this.isShow || !handlers[key]) {
        return;
      }

      e.preventDefault();
      e.stopPropagation();

      handlers[key]();
    });
  }

  mount(el) {
    // const parent = this.textarea.parentElement;
    // if (!parent) {
    //   throw Error("无法挂载提示词列表");
    // }
    const div = document.createElement("div");
    el.appendChild(div);
    div.classList.add("autocomplete-list");

    this.el = div;
    this.mounted = true;

    this.el.addEventListener("click", (evt) => {
      // 子元素点击
      if (evt.target != el && el.contains(evt.target)) {
        const idx = this.itemsEl.findIndex((item) => item.contains(evt.target));
        if (idx > 0) {
          this.activeIndex = idx;
          this.autocompleteDone();
        }
      }
    });

    this._initEvent();

    return div;
  }

  _createItem(item) {
    const { name, type, count, alias } = item;
    const div = document.createElement("div");
    const typeColor = {
      0: "#337ab7",
      1: "#A00",
      // 2: "darkorchid",
      3: "#A0A",
      4: "#0A0",
      5: "#F80",
    };

    div.style.color = `${typeColor[type] || "black"}`;
    div.innerHTML = `<span>${name}</span><span>${count}</span>`;

    return div;
  }

  appendItems(items) {
    this.el.innerHTML = ``;
    this.reset();
    this.items = items;

    const frg = document.createDocumentFragment();

    for (const item of items) {
      const itemEl = this._createItem(item);
      this.itemsEl.push(itemEl);
      frg.appendChild(itemEl);
    }

    this.el.appendChild(frg);
    this.switchActive(0);
  }

  hide() {
    if (this.isShow) {
      this.isShow = false;
      this.el.style.display = "none";
      this.reset();
    }
  }

  show() {
    if (!this.isShow) {
      this.isShow = true;
      this.el.style.display = "flex";
      this.el.style.flexFlow = "column";
    }
  }
}

class AutoComplete {
  constructor(textarea, parentEl, first_n) {
    this.textarea = textarea;
    this.FIRST_N = first_n;

    this.prevPrompt = this.textarea.value;
    this.userInputLength = -1;

    this.whiteList = ["-", "_", "(", ")", ".", "$"];

    this.autocompleteList = new AutoCompleteList((item) =>
      this.handleCompleteDone(item)
    );

    this.autocompleteList.mount(parentEl);
    this._initEvent();
  }

  _diffPrompt(prev, cur) {
    prev = prev
      .split(/[,\n]/)
      .map((p) => p.trim())
      .filter((p) => p);
    cur = cur
      .split(/[,\n]/)
      .map((p) => p.trim())
      .filter((p) => p);
    const count = {};

    for (const t of prev) {
      count[t] = count[t] == undefined ? 1 : count[t] + 1;
    }

    const result = [];
    for (const t of cur) {
      count[t] = count[t] == undefined ? -1 : count[t] - 1;
      if (count[t] < 0) {
        result.push(t.trim());
      }
    }

    return result;
  }

  handleCompleteDone(item) {
    item = { ...item };
    item.name = item.name.replace(/([\(\)\[\]])/g, "\\$1").replace(/_/g, " ");

    const { value, selectionStart, selectionEnd } = this.textarea;
    const start = selectionStart - this.userInputLength;
    const before = value.substring(0, start),
      after = value.substring(selectionEnd);
    const p = start + item.name.length + 2;
    this.textarea.value = before + item.name + ", " + after;
    this.textarea.setSelectionRange(p, p);

    this.hideAutoComplete();
  }

  hideAutoComplete() {
    this.resetInputState();
    this.autocompleteList.hide();
  }

  resetInputState() {
    this.userInputLength = -1;
    this.prevPrompt = this.textarea.value;
  }

  getPopListPosition() {
    return { left: 20 };
    const tmp_div = document.createElement("div");
    const text = this.textarea.value;
    tmp_div.textContent = text.substring(0, this.textarea.selectionStart);
    const tmp_span = document.createElement("span");
    tmp_span.textContent = ".";
    let { top, left } = this.textarea.getBoundingClientRect();

    Object.assign(tmp_div.style, {
      position: "absolute",
      left: `${left}px`,
      top: `${top}px`,
      visibility: "hidden",
      "word-break": "break-all",
      "white-space": "pre",
    });

    tmp_div.appendChild(tmp_span);
    this.textarea.parentElement.style.position = "relative";
    this.textarea.parentElement.appendChild(tmp_div);
    left = tmp_span.offsetLeft;
    tmp_div.remove();
    // tmp_div.classList.add("tmp1");

    return { left };
  }

  async _initEvent() {
    this.textarea.addEventListener("click", (e) => {
      e.stopPropagation();
      this.hideAutoComplete();
    });

    // this.textarea.addEventListener("blur", () => {
    //   this.hideAutoComplete();
    // });

    this.allTags = await new Tags().loadDANBOORUTags();

    this.textarea.addEventListener("input", (e) => {
      const diff = this._diffPrompt(this.prevPrompt, this.textarea.value);

      if (diff.length != 1) {
        return this.hideAutoComplete();
      }

      const text = diff[0].toLowerCase();

      this.autocompleteList.show();
      const results = this.allTags.filter((item) => item.name.includes(text));

      this.userInputLength = diff[0].length;

      if (!results.length) {
        return this.hideAutoComplete();
      }

      // 简单的前缀匹配优先排序
      if (results.length <= 500) {
        results.sort((a, b) => {
          if (a.name.startsWith(text)) {
            return a.count;
          } else if (b.name.startsWith(text)) {
            return b.count;
          }

          return 0;
        });
      }

      const { left } = this.getPopListPosition();

      if (left) {
        this.autocompleteList.el.style.left = `${left}px`;
      }

      this.autocompleteList.appendItems(results.slice(0, this.FIRST_N));
    });

    // this.textarea.addEventListener("keyup", (e) => {
    //   const key = e.key;

    //   if (key.length > 1) {
    //     return;
    //   }

    //   // 非 数字、字母，- _ 的跳过
    //   // if (!/\w/.test(key) && !this.whiteList.includes(key)) {
    //   //   this.hideAutoComplete();
    //   // }
    // });
  }
}

async function waitingForEl(selector) {
  function delay(ms) {
    return new Promise((resolve) => {
      setTimeout(() => resolve(), ms);
    });
  }

  let MAX_WATING_MS = 5000 * 5;

  while (MAX_WATING_MS >= 0) {
    if (document.querySelector(selector)) {
      break;
    }
    await delay(50);
    MAX_WATING_MS -= 50;
  }
}

(function () {
  // console.log(document.title)
  // if(!document.title.startsWith('Fooocus')) {
  //    return
  // }

  "use strict";
  for (const [textarea, parent] of CONFIG.selectors) {
    console.log(textarea, parent);
    waitingForEl(textarea).then(() => {
      new AutoComplete(
        document.querySelector(textarea),
        document.querySelector(parent),
        CONFIG.first_n
      );
    });
  }
})();