/* =============================================================================
 * M01_MasterData_UI_Logic_List.ts
 * 왼쪽 로직 목록 — 원문 · 장 · 이름 찾기 · 막힘만 · 막힘(⛔)·고침(●) 표시
 * 거르기는 화면에서(목록은 한 번 받음 · 391 줄 남짓)
 * ========================================================================== */

import { el } from "@ui/ui_template_elements";
import type { LogicSummary } from "./M01_MasterData_UI_Logic_Api";
import { tx } from "./M01_MasterData_UI_Logic_Text";

export type ListMark = "edited" | "new" | "deleted";

export interface ListItem {
  id: string;
  book: string;
  chapter: string;
  key: string;
  name: string;
  blocked: boolean;
  reasons: string[];
}

export interface ListHandle {
  root: HTMLElement;
  setItems: (items: LogicSummary[]) => void;
  /** 저장 안 한 새 로직도 목록 맨 위에 */
  setMarks: (marks: Map<string, ListMark>, extra: ListItem[]) => void;
  setActive: (id: string | null) => void;
}

export const logicId = (book: string, key: string): string => `${book}\n${key}`;

export function buildList(onOpen: (item: ListItem) => void): ListHandle {
  let items: ListItem[] = [];
  let extra: ListItem[] = [];
  let marks = new Map<string, ListMark>();
  let active: string | null = null;
  const book = el("select", { className: "m01-logic__input" });
  const chapter = el("select", { className: "m01-logic__input" });
  const search = el("input", {
    className: "m01-logic__input",
    attrs: { type: "search", placeholder: tx("List_Search") },
  });
  const blockedOnly = el("input", { attrs: { type: "checkbox" } });
  const count = el("span", { className: "m01-logic__muted" });
  const list = el("ul", { className: "m01-logic__list" });

  const options = (select: HTMLSelectElement, all: string, values: string[]): void => {
    const keep = select.value;
    select.replaceChildren(
      el("option", { text: all, attrs: { value: "" } }),
      ...values.map((v) => el("option", { text: v, attrs: { value: v } })),
    );
    select.value = values.includes(keep) ? keep : "";
  };
  const chapters = (): void =>
    options(chapter, tx("List_AllChapters"), [
      ...new Set(items.filter((x) => !book.value || x.book === book.value).map((x) => x.chapter)),
    ]);

  const draw = (): void => {
    const q = search.value.trim().toLowerCase();
    const shown = [...extra, ...items].filter(
      (x) =>
        (!book.value || x.book === book.value) &&
        (!chapter.value || x.chapter === chapter.value) &&
        (!blockedOnly.checked || x.blocked) &&
        (!q || x.key.toLowerCase().includes(q) || x.name.toLowerCase().includes(q)),
    );
    count.textContent = tx("List_Count", { n: shown.length });
    list.replaceChildren(...shown.slice(0, 500).map(line));
  };
  const line = (item: ListItem): HTMLElement => {
    const mark = marks.get(item.id);
    const badges: HTMLElement[] = [];
    if (item.blocked) {
      badges.push(
        el("span", {
          className: "m01-logic__badge m01-logic__badge--blocked",
          text: `⛔ ${tx("List_Blocked")}`,
          attrs: { title: item.reasons.join("\n") },
        }),
      );
    }
    if (mark) {
      const label = { edited: "List_Edited", new: "List_New", deleted: "List_Deleted" } as const;
      badges.push(el("span", { className: "m01-logic__badge", text: `● ${tx(label[mark])}` }));
    }
    const button = el("button", {
      className: `m01-logic__item${item.id === active ? " is-active" : ""}`,
      attrs: { type: "button", title: item.key },
      children: [
        el("span", { className: "m01-logic__muted", text: `${item.book} ${item.chapter}` }),
        el("span", { text: item.name || item.key }),
        el("span", { className: "m01-logic__badges", children: badges }),
      ],
    });
    button.addEventListener("click", () => onOpen(item));
    return el("li", { children: [button] });
  };

  book.addEventListener("change", () => {
    chapters();
    draw();
  });
  chapter.addEventListener("change", draw);
  search.addEventListener("input", draw);
  blockedOnly.addEventListener("change", draw);

  const root = el("aside", {
    className: "m01-logic__side",
    children: [
      el("div", {
        className: "m01-logic__filters",
        children: [
          book,
          chapter,
          search,
          el("label", {
            className: "m01-logic__check",
            children: [blockedOnly, el("span", { text: tx("List_BlockedOnly") })],
          }),
          count,
        ],
      }),
      list,
    ],
  });
  return {
    root,
    setItems: (logics) => {
      items = logics.map((x) => ({
        id: logicId(x.book, x.열쇠),
        book: x.book,
        chapter: x.chapter,
        key: x.열쇠,
        name: x.이름,
        blocked: x.blocked,
        reasons: x.reasons,
      }));
      options(book, tx("List_AllBooks"), [...new Set(items.map((x) => x.book))]);
      chapters();
      draw();
    },
    setMarks: (next, more) => {
      marks = next;
      extra = more;
      draw();
    },
    setActive: (id) => {
      active = id;
      draw();
    },
  };
}