/* =============================================================================
 * M01_LB_Steps.ts
 * 로직 만들기 판 가운데 문장 보기 — ① 입력값 ② 표 조회 ③ 계산 ④ 항목 연결 ⑤ 결과값
 * 모양은 `docs/raw/M01_쉬운단가/로직판_A_정함.md` · `로직판_A_설계초안.md` 7-1 그대로 · 모두 고르기 · 숫자 칸 · 바뀐 lb 는 on.change 로만 알림
 * 글 [한, 영] 짝은 아래 TEXT
 * ========================================================================== */

import { createButton, el, showToast } from "@ui/ui_template_elements";
import {
  fetchLogics,
  type CalcAnswer,
  type CalcLine,
  type LogicInput,
} from "../M01_MasterData_UI_Logic_Api";
import { formatMoney } from "../M01_MasterData_UI_Logic_Money";
import {
  addCard,
  addPercent,
  removeCard,
  updateCard,
  withInputs,
  type CostKind,
  type EasyCard,
  type PickResult,
} from "../EasyCalc/M01_EasyCalc_Model";
import { openEasyPick } from "../EasyCalc/M01_EasyCalc_Pick";
import { setCond, type LbLogic, type LbLookup, type LbRef } from "./M01_LB_Blocks";
import { calcBody, calcView } from "./M01_LB_Steps_Calc";
import {
  chip,
  logicNames,
  lookupValue,
  note,
  numBox,
  parseNum,
  refText,
  selectBox,
  sentence,
  span,
  textBox,
  tx,
  valueNote,
  type Ctx,
  type TEXT,
} from "./M01_LB_Steps_Cell";
import "./M01_LB_Steps.css";

type Kind = "person" | "material" | "machine" | "logic" | "percent" | "locked";

let picking = false;
let namesLoading = false;

/* ------------------------------ ① 입력값 ------------------------------ */

function inputView(ctx: Ctx, input: LogicInput, at: number): HTMLElement {
  const put = (patch: Partial<LogicInput>): void =>
    ctx.commit(() => {
      const inputs = ctx.lb.inputs.map((x, i) => (i === at ? { ...x, ...patch } : x));
      return { ...ctx.lb, inputs, doc: { ...ctx.lb.doc, inputs } };
    });
  const parts: (HTMLElement | string)[] = [span("m01-lbsteps-name", input.이름)];
  if (input.고르기) {
    parts.push(
      note(tx("PickList")),
      el("span", {
        className: "m01-lbsteps-chips",
        children: input.고르기.map((v) => chip(String(v))),
      }),
    );
  } else if (input.범위) {
    const [lo, hi] = input.범위;
    parts.push(
      note(tx("Range")),
      numBox(ctx, lo, (n) => put({ 범위: [n, hi] })),
      "~",
      numBox(ctx, hi, (n) => put({ 범위: [lo, n] })),
    );
  } else parts.push(note(tx("Number")));
  parts.push(
    note(tx("Unit")),
    textBox(ctx, input.단위 ?? "", (v) => put({ 단위: v })),
  );
  return el("li", { className: "m01-lbsteps-row", children: [sentence(...parts)] });
}

/* ------------------------------ ② 표 조회 ------------------------------ */

function condView(ctx: Ctx, lk: LbLookup, cond: LbLookup["conds"][number]): HTMLElement {
  const from = cond.from;
  const set = (next: LbRef | null): void =>
    ctx.commit(() => setCond(ctx.lb, lk.id, cond.col, next));
  const parts: (HTMLElement | string)[] = [chip(cond.col), tx("LkIs")];
  if (from.k === "input" || from.k === "fixed") {
    const options = [
      ...ctx.lb.inputs.map((i) => ({ value: `i:${i.이름}`, text: `${tx("SrcInput")}${i.이름}` })),
      { value: "f", text: tx("SrcFixed") },
      { value: "n", text: tx("SrcAny") },
    ];
    const current = from.k === "input" ? `i:${from.name}` : "f";
    parts.push(
      selectBox(
        ctx,
        options,
        current,
        (v) =>
          set(
            v === "n"
              ? null
              : v === "f"
                ? { k: "fixed", value: "" }
                : { k: "input", name: v.slice(2) },
          ),
        cond.col,
      ),
    );
    if (from.k === "fixed") {
      parts.push(
        textBox(ctx, String(from.value), (v) => set({ k: "fixed", value: parseNum(v) ?? v })),
      );
    }
  } else parts.push(chip(refText(ctx, from)));
  return el("span", { className: "m01-lbsteps-cond", children: parts });
}

function lookupView(ctx: Ctx, lk: LbLookup, n: number): HTMLElement {
  const name = ctx.on.tableName?.(lk.table) ?? lk.table;
  return el("li", {
    className: "m01-lbsteps-row",
    children: [
      sentence(
        span("m01-lbsteps-name", `${tx("LkNum")}${n}`),
        chip(name),
        tx("LkFrom"),
        ...lk.conds.map((c) => condView(ctx, lk, c)),
        tx("LkRow"),
        chip(lk.col),
        valueNote(lookupValue(ctx, lk)),
      ),
    ],
  });
}

/* ------------------------------ ④ 항목 연결 ------------------------------ */

const BASES: (CostKind | "사람줄합")[] = ["노무비", "재료비", "경비", "사람줄합"];

function lineMap(ctx: Ctx): Map<string, CalcLine> {
  const out = new Map<string, CalcLine>();
  const ans = ctx.ans;
  if (!ans || !ans.ok || !ans.lines) return out;
  const cards = ctx.lb.doc.cards;
  const part = (c: EasyCard): string =>
    c.kind === "percent" ? "덧줄" : c.kind === "locked" ? (c.source?.part ?? "덧줄") : "호표";
  const ordered = [
    ...cards.filter((c) => part(c) === "호표"),
    ...cards.filter((c) => part(c) === "덧줄"),
  ];
  if (ordered.length === ans.lines.length) ordered.forEach((c, i) => out.set(c.id, ans.lines![i]));
  return out;
}

const patchItem = (ctx: Ctx, id: string, patch: Partial<EasyCard>): void =>
  ctx.commit(() => ({ ...ctx.lb, doc: updateCard(ctx.lb.doc, id, patch) }));

async function pickItem(ctx: Ctx, kind: PickResult["kind"], card?: EasyCard): Promise<void> {
  if (picking) return;
  picking = true;
  try {
    const pick = await openEasyPick(kind);
    if (!pick) return;
    ctx.commit(() => {
      if (!card) return { ...ctx.lb, doc: addCard(ctx.lb.doc, pick) };
      const next = updateCard(ctx.lb.doc, card.id, {
        name: pick.name,
        spec: pick.spec,
        unit: pick.unit,
        element: pick.element,
      });
      return { ...ctx.lb, doc: withInputs(next, pick.needInputs ?? []) };
    });
  } finally {
    picking = false;
  }
}

function itemView(ctx: Ctx, card: EasyCard): HTMLElement {
  const kind = card.kind as Kind;
  const percent = kind === "percent";
  const part = card.source?.part === "호표" ? "수량" : "비율";
  const calc = card.source
    ? ctx.lb.calcs.find((c) => c.at.part === part && c.at.index === card.source?.index)
    : undefined;
  const line = ctx.lines.get(card.id);
  const qty: HTMLElement = calc
    ? el("span", {
        className: "m01-lbsteps-ref",
        children: [chip(`${tx("Calc")}${ctx.lb.calcs.indexOf(calc) + 1}`), valueNote(line?.수량)],
      })
    : card.qtyFormula === null
      ? numBox(ctx, card.qty, (n) => patchItem(ctx, card.id, { qty: n }))
      : chip(tx("Hard"));
  const name =
    ctx.ro || kind === "locked" || percent
      ? span("m01-lbsteps-name", [card.name, card.spec].filter(Boolean).join(" "))
      : (() => {
          const b = el("button", {
            className: "m01-lbsteps-pick",
            text: `${[card.name, card.spec].filter(Boolean).join(" ")} ▾`,
            attrs: { type: "button", "aria-label": tx("Repick") },
          });
          b.addEventListener("click", () => void pickItem(ctx, kind as PickResult["kind"], card));
          return b;
        })();
  const head: (HTMLElement | string)[] = [span("m01-lbsteps-tag", `【${tx(`Tag_${kind}`)}】`)];
  if (percent) {
    const options = BASES.map((v) => ({ value: v, text: tx(`Base_${v}`) }));
    head.push(
      selectBox(
        ctx,
        options,
        card.percentBase ?? "노무비",
        (v) => patchItem(ctx, card.id, { percentBase: v as EasyCard["percentBase"] }),
        tx("S4"),
      ),
      tx("Pre_percent"),
      qty,
      tx("Post_percent"),
      name,
    );
  } else {
    head.push(
      name,
      kind === "person" ? tx("Pre_person") : tx("Pre_pick"),
      qty,
      span("m01-lbsteps-unit", ` ${card.unit}`),
    );
  }
  head.push(
    line
      ? span("m01-lbsteps-amount", `= ${formatMoney(line.금액)} ${tx("Won")}`)
      : span("m01-lbsteps-amount is-wait", `= ${tx("Pending")}`),
  );
  if (!ctx.ro) {
    head.push(
      createButton({
        label: tx("Remove"),
        variant: "ghost",
        size: "sm",
        onClick: () => ctx.commit(() => ({ ...ctx.lb, doc: removeCard(ctx.lb.doc, card.id) })),
      }),
    );
  }
  return el("li", { className: "m01-lbsteps-row", children: [sentence(...head)] });
}

function addBar(ctx: Ctx): HTMLElement {
  const add = (key: keyof typeof TEXT, run: () => void): HTMLButtonElement =>
    createButton({ label: tx(key), variant: "ghost", size: "sm", onClick: run });
  const pick = (kind: PickResult["kind"]) => () => void pickItem(ctx, kind);
  return el("div", {
    className: "m01-lbsteps-add",
    children: [
      add("Add_person", pick("person")),
      add("Add_material", pick("material")),
      add("Add_machine", pick("machine")),
      add("Add_logic", pick("logic")),
      add("Add_percent", () =>
        ctx.commit(() => ({ ...ctx.lb, doc: addPercent(ctx.lb.doc, "", "노무비", null, "경비") })),
      ),
    ],
  });
}

/* ------------------------------ ⑤ 결과값 ------------------------------ */

function resultView(ctx: Ctx): HTMLElement {
  const result = ctx.lb.result;
  const ans = ctx.ans;
  if (result.kind === "값") {
    const value = ans?.ok ? ans.result : undefined;
    return el("div", {
      children: [
        sentence(note(tx("ResultValue")), chip(result.unit), valueNote(value)),
        calcBody(ctx, result.calc),
      ],
    });
  }
  const sums = ans?.ok ? ans.sums : undefined;
  const parts: (HTMLElement | string)[] = [note(tx("ResultMoney")), chip(result.unit)];
  if (sums) {
    for (const k of ["노무비", "재료비", "경비"]) {
      if (k in sums)
        parts.push(
          span("m01-lbsteps-sum", `${tx(`Base_${k as CostKind}`)} ${formatMoney(sums[k])}`),
        );
    }
    parts.push(
      span("m01-lbsteps-total", `${tx("Total")} ${formatMoney(sums["계"] ?? 0)} ${tx("Won")}`),
    );
  } else parts.push(span("m01-lbsteps-amount is-wait", `= ${tx("Pending")}`));
  return sentence(...parts);
}

/* ------------------------------ 전체 ------------------------------ */

function section(title: string, items: HTMLElement[], extra?: HTMLElement): HTMLElement {
  const body = items.length
    ? el("ol", { className: "m01-lbsteps-list", children: items })
    : note(tx("None"));
  return el("section", {
    className: "m01-lbsteps-sec",
    children: [
      el("h3", { className: "m01-lbsteps-title", text: title }),
      body,
      ...(extra ? [extra] : []),
    ],
  });
}

/** 가운데 문장 보기 그리기 — ans 는 칸마다 곁에 보이는 예시값 · null 이면 「계산 중」 */
export function renderSteps(
  host: HTMLElement,
  lb: LbLogic,
  ans: CalcAnswer | null,
  on: { change(lb: LbLogic): void; tableName?(table: string): string | null },
): void {
  const ctx: Ctx = {
    lb,
    ans,
    ro: lb.doc.isBase,
    on,
    lines: new Map(),
    commit: (make) => {
      try {
        on.change(make());
      } catch {
        showToast(tx("Cannot"), "error");
      }
    },
  };
  ctx.lines = lineMap(ctx);
  host.classList.add("m01-lbsteps");
  const top: HTMLElement[] = [];
  if (ctx.ro) top.push(el("p", { className: "m01-lbsteps-banner", text: tx("BaseNote") }));
  if (lb.blocked.length) {
    top.push(
      el("div", {
        className: "m01-lbsteps-banner is-warn",
        children: [
          el("p", { text: `⚠ ${tx("Blocked")}` }),
          ...lb.blocked.map((b) => el("p", { className: "m01-lbsteps-why", text: b })),
        ],
      }),
    );
  }
  host.replaceChildren(
    ...top,
    section(
      tx("S1"),
      lb.inputs.map((x, i) => inputView(ctx, x, i)),
    ),
    section(
      tx("S2"),
      lb.lookups.map((l, i) => lookupView(ctx, l, i + 1)),
    ),
    section(
      tx("S3"),
      lb.calcs.map((c, i) => calcView(ctx, c, i + 1)),
    ),
    section(
      tx("S4"),
      lb.doc.cards.map((c) => itemView(ctx, c)),
      ctx.ro ? undefined : addBar(ctx),
    ),
    section(tx("S5"), [el("li", { className: "m01-lbsteps-row", children: [resultView(ctx)] })]),
  );
  // 다른 일위대가 이름 — 목록을 한 번 받은 뒤 다시 그림
  if (
    !logicNames.size &&
    !namesLoading &&
    JSON.stringify([lb.calcs, lb.lookups]).includes('"k":"logic"')
  ) {
    namesLoading = true;
    fetchLogics()
      .then((all) => {
        for (const l of all) logicNames.set(l.키, l.이름);
        renderSteps(host, lb, ans, on);
      })
      .catch(() => undefined)
      .finally(() => (namesLoading = false));
  }
}