/* =============================================================================
 * M01_EasyCalc_Cards.ts
 * 쉬운 단가산출 카드 그리기 — 묶음 + 소계 · 문장 칸 · 잠금 카드 · 지움 · ▲▼ · 카드 안 경고 · 더하기 단추
 * 모양은 `docs/raw/M01_쉬운단가/설계.md` 3절 그대로 · 바뀐 doc 는 on.change 로만 알림(그리기는 부른 쪽이 다시)
 * 글 [한, 영] 짝은 아래 TEXT
 * ========================================================================== */

import { currentLanguageIndex } from "@ui/ui_template_locale";
import { createButton, el, showConfirmDialog } from "@ui/ui_template_elements";
import type { CalcAnswer, CalcLine } from "../M01_MasterData_UI_Logic_Api";
import { formatNumber } from "../M01_MasterData_UI_Logic_Edit";
import { formatMoney } from "../M01_MasterData_UI_Logic_Money";
import {
  addCard,
  addPercent,
  checkCard,
  removeCard,
  updateCard,
  withInputs,
  type CostKind,
  type EasyCard,
  type EasyDoc,
  type PickResult,
} from "./M01_EasyCalc_Model";
import { openEasyPick } from "./M01_EasyCalc_Pick";
import { openEasyCond, readCond } from "./M01_EasyCalc_Cond";
import { openEasyTable, readFinds } from "./M01_EasyCalc_Table";
import "./M01_EasyCalc_Cards.css";

const TEXT = {
  Group_person: ["사람", "Workers"],
  Group_material: ["재료", "Materials"],
  Group_machine: ["기계·경비", "Machines"],
  Group_logic: ["다른 일위대가", "Other unit prices"],
  Group_percent: ["덧붙임", "Add-ons"],
  Subtotal: ["소계", "Subtotal"],
  Won: ["원", "KRW"],
  Empty: ["아직 없음", "none yet"],
  Pending: ["계산 중", "calculating"],
  Tag_person: ["사람", "Worker"],
  Tag_material: ["재료", "Material"],
  Tag_machine: ["기계", "Machine"],
  Tag_logic: ["다른 일위대가", "Other unit price"],
  Tag_percent: ["덧붙임", "Add-on"],
  Pre_person: [" 이 ", " works "],
  Post_person: [" 일함", ""],
  Pre_pick: [" 를 ", " uses "],
  Post_material: [" 씀", ""],
  Post_machine: [" 씀", ""],
  Post_logic: ["", ""],
  Pre_percent: [" 의 ", " of "],
  Mid_percent: [" % 를 ", " % as "],
  Post_percent: [" 로 더함", ""],
  Slot: ["넣을 자리", "put into"],
  Pick_Empty: ["고르기", "choose"],
  Repick: ["다른 것으로 다시 고르기", "Choose another"],
  Eg_qty: ["예: 0.072", "e.g. 0.072"],
  Eg_percent: ["예: 2", "e.g. 2"],
  Eg_name: ["예: 공구손료", "e.g. tool wear"],
  Qty: ["수량", "Amount"],
  Name: ["이름", "Name"],
  Auto: ["자동", "auto"],
  Locked: ["잠김", "Locked"],
  ToNumber: ["숫자로 바꾸기", "Make it a number"],
  ByTable: ["표 보고 고르기", "Choose from table"],
  ByCond: ["조건 보고 고치기", "Edit conditions"],
  ToNumber_Wait: ["계산이 끝난 뒤 가능", "Available after calculation"],
  ToNumber_Ask: [
    "자동 값을 그대로 숫자로 바꿈 · 이후 자동으로 달라지지 않음",
    "Freeze the auto value as a number",
  ],
  ToNumber_Ok: ["바꾸기", "Convert"],
  Remove: ["지움", "Remove"],
  Up: ["위로", "Move up"],
  Down: ["아래로", "Move down"],
  Add_person: ["+ 사람", "+ Worker"],
  Add_material: ["+ 재료", "+ Material"],
  Add_machine: ["+ 기계", "+ Machine"],
  Add_logic: ["+ 다른 일위대가", "+ Other unit price"],
  Add_percent: ["+ 덧붙임", "+ Add-on"],
  Base_노무비: ["사람 품값", "labor cost"],
  Base_재료비: ["재료값", "material cost"],
  Base_경비: ["기계·경비", "machine & expenses"],
  Base_사람줄합: ["사람 줄의 합", "sum of worker lines"],
} as const;

const tc = (key: keyof typeof TEXT): string => TEXT[key][currentLanguageIndex];

type Group = "person" | "material" | "machine" | "logic" | "percent";
const GROUPS: Group[] = ["person", "material", "machine", "logic", "percent"];
type PercentBase = NonNullable<EasyCard["percentBase"]>;
const BASES: PercentBase[] = ["노무비", "재료비", "경비", "사람줄합"];
const COSTS: CostKind[] = ["노무비", "재료비", "경비"];

interface Ctx {
  doc: EasyDoc;
  lines: Map<string, CalcLine>;
  readOnly: boolean;
  on: { change(doc: EasyDoc): void; trial?(): Record<string, unknown> };
  /** 숫자 아님으로 친 글 — 다시 그려도 칸에 남김 */
  badText: Map<string, string>;
}

const badTexts = new WeakMap<HTMLElement, Map<string, string>>();
const closedGroups = new WeakMap<HTMLElement, Set<Group>>();
let picking = false;

const groupOf = (card: EasyCard): Group => {
  if (card.kind !== "locked") return card.kind;
  if (card.source?.part === "덧줄") return "percent";
  const kind = (card.raw as { 종류?: string } | null)?.종류;
  return kind === "인력" ? "person" : kind === "재료" ? "material" : "logic";
};

/** Model 의 toRow 와 같은 나눔 — 줄 차례가 어긋나지 않게 */
const partOf = (card: EasyCard): "호표" | "덧줄" =>
  card.kind === "percent"
    ? "덧줄"
    : card.kind === "locked"
      ? (card.source?.part ?? "덧줄")
      : "호표";

/** 식 수량이거나 종류를 못 알아본 줄 — 숫자로 바꾸기 전까지 잠김 */
const isLocked = (card: EasyCard): boolean =>
  card.qtyFormula !== null || (card.kind === "locked" && card.lockedWhy !== null);

/** 카드 → 서버 계산 줄 — 호표 줄 차례 뒤에 덧줄 차례 · 줄 수가 안 맞으면(옛 응답) 없음 */
function lineMap(doc: EasyDoc, ans: CalcAnswer | null): Map<string, CalcLine> {
  const out = new Map<string, CalcLine>();
  if (!ans || !ans.ok || !ans.lines) return out;
  const ordered = [
    ...doc.cards.filter((c) => partOf(c) === "호표"),
    ...doc.cards.filter((c) => partOf(c) === "덧줄"),
  ];
  if (ordered.length !== ans.lines.length) return out;
  ordered.forEach((card, i) => out.set(card.id, ans.lines![i]));
  return out;
}

const parseQty = (text: string): number | null => {
  const t = text.replace(/[,\s]/g, "");
  if (t === "") return null;
  return /^[+-]?(\d+\.?\d*|\.\d+)$/.test(t) ? Number(t) : Number.NaN;
};

/** 검사가 막혀도 그리기는 계속 */
function warnOf(ctx: Ctx, card: EasyCard): string | null {
  if (ctx.doc.isBase) return null;
  try {
    return checkCard(card, ctx.doc);
  } catch {
    return null;
  }
}

function patchCard(ctx: Ctx, card: EasyCard, patch: Partial<EasyCard>): void {
  ctx.on.change(updateCard(ctx.doc, card.id, patch));
}

/** 화면 묶음 안 이웃과 자리 바꿈 — 잠금 카드도 같은 묶음이라 Model.moveCard 의 묶음과 달라 여기서 바꿈 */
function swapInGroup(doc: EasyDoc, card: EasyCard, step: -1 | 1): EasyDoc {
  const same = doc.cards.filter((c) => groupOf(c) === groupOf(card));
  const neighbor = same[same.indexOf(card) + step];
  if (!neighbor) return doc;
  const cards = doc.cards.slice();
  const a = cards.indexOf(card);
  const b = cards.indexOf(neighbor);
  [cards[a], cards[b]] = [cards[b], cards[a]];
  return { ...doc, cards };
}

async function repick(ctx: Ctx, card: EasyCard): Promise<void> {
  if (picking || card.kind === "locked" || card.kind === "percent") return;
  picking = true;
  try {
    const pick = await openEasyPick(card.kind, { qty: card.qty });
    if (!pick) return;
    const next = updateCard(ctx.doc, card.id, {
      name: pick.name,
      spec: pick.spec,
      unit: pick.unit,
      element: pick.element,
      qty: pick.qty,
    });
    ctx.on.change(withInputs(next, pick.needInputs ?? []));
  } finally {
    picking = false;
  }
}

async function addByPick(ctx: Ctx, kind: PickResult["kind"]): Promise<void> {
  if (picking) return;
  picking = true;
  try {
    const pick = await openEasyPick(kind);
    if (pick) ctx.on.change(addCard(ctx.doc, pick));
  } finally {
    picking = false;
  }
}

function addBlankPercent(ctx: Ctx): void {
  ctx.on.change(addPercent(ctx.doc, "", "노무비", null, "경비"));
}

async function lockToNumber(ctx: Ctx, card: EasyCard, value: number): Promise<void> {
  const ask = `${tc("ToNumber_Ask")} (${formatNumber(value)})`;
  if (await showConfirmDialog(ask, tc("ToNumber_Ok"))) {
    patchCard(ctx, card, { qty: value, qtyFormula: null, lockedWhy: null });
  }
}

/** 표 · 조건 창 — 답(새 식)이 있으면 그 카드 식만 바꿈 */
async function editFormula(
  ctx: Ctx,
  card: EasyCard,
  open: typeof openEasyTable | typeof openEasyCond,
): Promise<void> {
  if (picking) return;
  picking = true;
  try {
    const formula = await open(card, ctx.doc, ctx.on.trial?.());
    if (formula !== null) patchCard(ctx, card, { qtyFormula: formula });
  } finally {
    picking = false;
  }
}

/* ------------------------------ 칸 만들기 ------------------------------ */

const text = (cls: string, value: string): HTMLSpanElement =>
  el("span", { className: cls, text: value });

function qtyInput(ctx: Ctx, card: EasyCard): HTMLInputElement {
  const bad = ctx.badText.get(card.id);
  const shown = card.qty === null ? "" : Number.isNaN(card.qty) ? (bad ?? "") : String(card.qty);
  const input = el("input", {
    className: "ui-input m01-easycards-qty",
    attrs: {
      type: "text",
      inputmode: "decimal",
      placeholder: tc(card.kind === "percent" ? "Eg_percent" : "Eg_qty"),
      "aria-label": tc("Qty"),
    },
  });
  input.value = shown;
  if (ctx.readOnly) input.readOnly = true;
  input.addEventListener("change", () => {
    const qty = parseQty(input.value);
    if (Number.isNaN(qty)) ctx.badText.set(card.id, input.value);
    else ctx.badText.delete(card.id);
    if (Object.is(qty, card.qty)) return;
    patchCard(ctx, card, { qty });
  });
  return input;
}

function nameWidget(ctx: Ctx, card: EasyCard): HTMLElement {
  if (card.kind === "percent") {
    const input = el("input", {
      className: "ui-input m01-easycards-text",
      attrs: { type: "text", placeholder: tc("Eg_name"), "aria-label": tc("Name") },
    });
    input.value = card.name;
    if (ctx.readOnly) input.readOnly = true;
    input.addEventListener("change", () => {
      if (input.value !== card.name) patchCard(ctx, card, { name: input.value.trim() });
    });
    return input;
  }
  const label = [card.name, card.spec].filter(Boolean).join(" ") || tc("Pick_Empty");
  if (ctx.readOnly || card.kind === "locked") return text("m01-easycards-name", label);
  const button = el("button", {
    className: "m01-easycards-name m01-easycards-name--pick",
    text: `${label} ▾`,
    attrs: { type: "button", "aria-label": `${label} — ${tc("Repick")}` },
  });
  button.addEventListener("click", () => void repick(ctx, card));
  return button;
}

function selectBox<T extends string>(
  ctx: Ctx,
  values: T[],
  current: T | null,
  label: (v: T) => string,
  onPick: (v: T) => void,
  aria: string,
): HTMLElement {
  if (ctx.readOnly) return text("m01-easycards-name", current ? label(current) : "");
  const select = el("select", {
    className: "ui-select m01-easycards-select",
    attrs: { "aria-label": aria },
  });
  if (current === null)
    select.append(el("option", { attrs: { value: "" }, text: tc("Pick_Empty") }));
  for (const v of values) select.append(el("option", { attrs: { value: v }, text: label(v) }));
  select.value = current ?? "";
  select.addEventListener("change", () => {
    if (select.value) onPick(select.value as T);
  });
  return select;
}

function amountText(ctx: Ctx, card: EasyCard): HTMLElement {
  const line = ctx.lines.get(card.id);
  if (!line) return text("m01-easycards-amount m01-easycards-amount--wait", `= ${tc("Pending")}`);
  return text("m01-easycards-amount", `= ${formatMoney(line.금액)} ${tc("Won")}`);
}

function toolButtons(ctx: Ctx, card: EasyCard, group: EasyCard[]): HTMLElement | null {
  if (ctx.readOnly) return null;
  const at = group.indexOf(card);
  const move = (label: string, glyph: string, step: -1 | 1, off: boolean) => {
    const b = createButton({
      label: glyph,
      variant: "ghost",
      size: "sm",
      disabled: off,
      onClick: () => ctx.on.change(swapInGroup(ctx.doc, card, step)),
    });
    b.setAttribute("aria-label", label);
    return b;
  };
  return el("div", {
    className: "m01-easycards-tools",
    children: [
      move(tc("Up"), "▲", -1, at <= 0),
      move(tc("Down"), "▼", 1, at >= group.length - 1),
      createButton({
        label: tc("Remove"),
        variant: "ghost",
        size: "sm",
        onClick: () => ctx.on.change(removeCard(ctx.doc, card.id)),
      }),
    ],
  });
}

/** 한 카드 = 문장 한 줄(좁으면 두 줄로 접힘) */
function cardView(ctx: Ctx, card: EasyCard, group: EasyCard[]): HTMLElement {
  const g = groupOf(card);
  const locked = isLocked(card);
  const percent = card.kind === "percent";
  const plain = card.kind === "locked";
  const name = nameWidget(ctx, card);
  const value = locked ? lockedValue(ctx, card) : qtyInput(ctx, card);
  const parts: (HTMLElement | string)[] = [text("m01-easycards-tag", `【${tc(`Tag_${g}`)}】`)];

  if (percent) {
    parts.push(
      selectBox(
        ctx,
        BASES,
        card.percentBase,
        (v) => tc(`Base_${v}`),
        (v) => patchCard(ctx, card, { percentBase: v }),
        tc("Slot"),
      ),
      tc("Pre_percent"),
      value,
      tc("Mid_percent"),
      name,
      tc("Post_percent"),
    );
  } else {
    parts.push(
      name,
      plain ? " " : g === "person" ? tc("Pre_person") : tc("Pre_pick"),
      value,
      text("m01-easycards-unit", ` ${card.unit}`),
      plain ? "" : tc(`Post_${g}` as "Post_person"),
    );
  }

  const slot = percent
    ? el("span", {
        className: "m01-easycards-slot",
        children: [
          ` · ${tc("Slot")} `,
          selectBox(
            ctx,
            COSTS,
            card.cost,
            (v) => tc(`Base_${v}`),
            (v) => patchCard(ctx, card, { cost: v }),
            tc("Slot"),
          ),
        ],
      })
    : null;

  const head = el("div", {
    className: "m01-easycards-line",
    children: [
      el("div", {
        className: "m01-easycards-sentence",
        children: slot ? [...parts, slot] : parts,
      }),
      amountText(ctx, card),
      toolButtons(ctx, card, group) ?? "",
    ],
  });
  const rows: HTMLElement[] = [head];

  const warn = warnOf(ctx, card);
  if (warn) rows.push(el("p", { className: "m01-easycards-warn", text: `⚠ ${warn}` }));
  if (locked) rows.push(lockedNote(ctx, card));
  return el("li", {
    className: `m01-easycards-card${locked ? " m01-easycards-card--locked" : ""}`,
    children: rows,
  });
}

/** 잠금 카드 값 자리 — 「자동 0.50」 */
function lockedValue(ctx: Ctx, card: EasyCard): HTMLElement {
  const line = ctx.lines.get(card.id);
  const value = line ? formatNumber(line.수량) : tc("Pending");
  return text("m01-easycards-auto", `(${tc("Auto")} ${value})`);
}

function lockedNote(ctx: Ctx, card: EasyCard): HTMLElement {
  const line = ctx.lines.get(card.id);
  const note: (HTMLElement | string)[] = [
    text("m01-easycards-lock", `🔒 ${tc("Locked")}`),
    text("m01-easycards-why", card.lockedWhy ?? ""),
  ];
  if (!ctx.readOnly) {
    const button = createButton({
      label: tc("ToNumber"),
      variant: "ghost",
      size: "sm",
      disabled: !line,
      onClick: () => line && void lockToNumber(ctx, card, line.수량),
    });
    if (!line) button.title = tc("ToNumber_Wait");
    note.push(button);
    const formula = card.qtyFormula;
    const tools: [boolean, keyof typeof TEXT, typeof openEasyTable | typeof openEasyCond][] = [
      [formula !== null && !!readFinds(formula)?.length, "ByTable", openEasyTable],
      [formula !== null && !!readCond(formula, ctx.doc.row), "ByCond", openEasyCond],
    ];
    for (const [has, label, open] of tools) {
      if (has)
        note.push(
          createButton({
            label: tc(label),
            variant: "ghost",
            size: "sm",
            onClick: () => void editFormula(ctx, card, open),
          }),
        );
    }
  }
  return el("div", { className: "m01-easycards-locknote", children: note });
}

/* ------------------------------ 묶음 · 전체 ------------------------------ */

function groupView(ctx: Ctx, host: HTMLElement, group: Group, cards: EasyCard[]): HTMLElement {
  const title = tc(`Group_${group}`);
  if (!cards.length) {
    return el("section", {
      className: "m01-easycards-group m01-easycards-group--empty",
      children: [
        text("m01-easycards-group__title", title),
        text("m01-easycards-group__none", tc("Empty")),
      ],
    });
  }
  const found = cards.map((c) => ctx.lines.get(c.id)).filter((l): l is CalcLine => !!l);
  const sum =
    found.length === cards.length
      ? `${tc("Subtotal")} ${formatMoney(found.reduce((s, l) => s + l.금액, 0))} ${tc("Won")}`
      : `${tc("Subtotal")} ${tc("Pending")}`;
  const details = el("details", {
    className: "m01-easycards-group",
    children: [
      el("summary", {
        className: "m01-easycards-group__head",
        children: [
          text("m01-easycards-group__title", title),
          text(
            `m01-easycards-group__sum${found.length === cards.length ? "" : " m01-easycards-amount--wait"}`,
            sum,
          ),
        ],
      }),
      el("ul", {
        className: "m01-easycards-list",
        children: cards.map((c) => cardView(ctx, c, cards)),
      }),
    ],
  });
  const closed = closedGroups.get(host) ?? new Set<Group>();
  closedGroups.set(host, closed);
  details.open = !closed.has(group);
  details.addEventListener("toggle", () => {
    if (details.open) closed.delete(group);
    else closed.add(group);
  });
  return details;
}

function addBar(ctx: Ctx): HTMLElement {
  const add = (key: keyof typeof TEXT, run: () => void) =>
    createButton({ label: tc(key), variant: "ghost", onClick: run });
  return el("div", {
    className: "m01-easycards-add",
    children: [
      add("Add_person", () => void addByPick(ctx, "person")),
      add("Add_material", () => void addByPick(ctx, "material")),
      add("Add_machine", () => void addByPick(ctx, "machine")),
      add("Add_logic", () => void addByPick(ctx, "logic")),
      add("Add_percent", () => addBlankPercent(ctx)),
    ],
  });
}

/** 카드 묶음 그리기 — ans 는 줄 금액 · null 이면 「계산 중」 */
export function renderCards(
  host: HTMLElement,
  doc: EasyDoc,
  ans: CalcAnswer | null,
  on: { change(doc: EasyDoc): void; trial?(): Record<string, unknown> },
): void {
  const badText = badTexts.get(host) ?? new Map<string, string>();
  badTexts.set(host, badText);
  const ctx: Ctx = { doc, lines: lineMap(doc, ans), readOnly: doc.isBase, on, badText };
  host.classList.add("m01-easycards");
  host.replaceChildren(
    ...GROUPS.map((g) =>
      groupView(
        ctx,
        host,
        g,
        doc.cards.filter((c) => groupOf(c) === g),
      ),
    ),
    ...(ctx.readOnly ? [] : [addBar(ctx)]),
  );
}