/* =============================================================================
 * M01_LB_Steps_Calc.ts
 * 로직 만들기 판 문장 보기 ③ 계산 — 값 · 곱나눔 · 할증 · 조건 목록 · 최소/최대 · 올림
 * ========================================================================== */

import { el } from "@ui/ui_template_elements";
import type { CondOp, CondRead, CondShape, CondSlot } from "../EasyCalc/M01_EasyCalc_Cond";
import { setCalc, type LbCalc } from "./M01_LB_Blocks";
import {
  chip,
  middleOf,
  note,
  numBox,
  refBox,
  selectBox,
  sentence,
  span,
  textBox,
  tx,
  valueNote,
  type Ctx,
  type TEXT,
} from "./M01_LB_Steps_Cell";

const OPS: [CondOp, keyof typeof TEXT][] = [
  ["==", "OpEq"],
  ["!=", "OpNe"],
  [">", "OpGt"],
  [">=", "OpGe"],
  ["<", "OpLt"],
  ["<=", "OpLe"],
];

function slotBox(ctx: Ctx, slot: CondSlot, put: (s: CondSlot) => void): HTMLElement {
  if (slot.kind === "num") return numBox(ctx, slot.value, (n) => put({ kind: "num", value: n }));
  if (slot.kind === "text") return textBox(ctx, slot.value, (v) => put({ kind: "text", value: v }));
  if (slot.kind === "input") {
    const options = ctx.lb.inputs.map((i) => ({ value: i.이름, text: i.이름 }));
    return selectBox(ctx, options, slot.name, (v) => put({ kind: "input", name: v }), tx("S1"));
  }
  return chip(tx(slot.kind === "table" ? "SlotTable" : "SlotCalc"));
}

function shapeView(ctx: Ctx, shape: CondShape, put: (s: CondShape) => void): HTMLElement {
  if (shape.type === "pick") {
    const items: (HTMLElement | string)[] = [];
    shape.items.forEach((s, i) => {
      if (i) items.push(tx("And"));
      items.push(
        slotBox(ctx, s, (v) =>
          put({ ...shape, items: shape.items.map((x, j) => (j === i ? v : x)) }),
        ),
      );
    });
    const fn = [
      { value: "최소", text: tx("Small") },
      { value: "최대", text: tx("Big") },
    ];
    return sentence(
      ...items,
      selectBox(ctx, fn, shape.fn, (v) => put({ ...shape, fn: v as "최소" | "최대" }), tx("S3")),
    );
  }
  if (shape.type === "round") {
    const fns = [
      { value: "올림", text: tx("Up") },
      { value: "버림", text: tx("Down") },
      { value: "반올림", text: tx("Half") },
    ];
    return sentence(
      slotBox(ctx, shape.value, (v) => put({ ...shape, value: v })),
      tx("RoundA"),
      numBox(ctx, shape.places, (n) => put({ ...shape, places: n, hadPlaces: true })),
      tx("RoundB"),
      selectBox(
        ctx,
        fns,
        shape.fn,
        (v) => put({ ...shape, fn: v as "올림" | "버림" | "반올림" }),
        tx("S3"),
      ),
    );
  }
  const ops = OPS.map(([value, key]) => ({ value, text: tx(key) }));
  const rows = shape.branches.map((b, i) => {
    const edit = (patch: Partial<typeof b>): void =>
      put({ ...shape, branches: shape.branches.map((x, j) => (j === i ? { ...x, ...patch } : x)) });
    return el("li", {
      className: "m01-lbsteps-branch",
      children: [
        sentence(
          span("m01-lbsteps-order", String(i + 1)),
          slotBox(ctx, b.test.left, (v) => edit({ test: { ...b.test, left: v } })),
          tx("Subject"),
          slotBox(ctx, b.test.right, (v) => edit({ test: { ...b.test, right: v } })),
          selectBox(
            ctx,
            ops,
            b.test.op,
            (v) => edit({ test: { ...b.test, op: v as CondOp } }),
            tx("S3"),
          ),
          "→",
          slotBox(ctx, b.value, (v) => edit({ value: v })),
        ),
      ],
    });
  });
  const last = el("li", {
    className: "m01-lbsteps-branch",
    children: [
      sentence(
        tx("Otherwise"),
        slotBox(ctx, shape.otherwise, (v) => put({ ...shape, otherwise: v })),
      ),
    ],
  });
  return el("div", {
    className: "m01-lbsteps-shape",
    children: [
      note(tx("Cond1")),
      el("ol", { className: "m01-lbsteps-branches", children: [...rows, last] }),
    ],
  });
}

function placeText(ctx: Ctx, calc: LbCalc): string {
  if (calc.name !== null) return calc.name;
  const { part, index } = calc.at;
  if (part === "결과") return tx("PlaceResult");
  const card = ctx.lb.doc.cards.find(
    (c) => c.source?.index === index && c.source.part === (part === "수량" ? "호표" : "덧줄"),
  );
  return `${card?.name ?? ""} ${tx(part === "수량" ? "PlaceQty" : "PlaceRate")}`.trim();
}

export function calcBody(ctx: Ctx, calc: LbCalc): HTMLElement {
  const put = (patch: Partial<LbCalc>): void => ctx.commit(() => setCalc(ctx.lb, calc, patch));
  const refAt = (i: number): HTMLElement =>
    refBox(ctx, calc.parts[i], calc, (r) =>
      put({ parts: calc.parts.map((p, j) => (j === i ? r : p)) }),
    );
  if (calc.cond && calc.cond.blocks.length) {
    const read: CondRead = calc.cond;
    return el("div", {
      className: "m01-lbsteps-shapes",
      children: read.blocks.map((b, bi) =>
        shapeView(ctx, b.shape, (shape) =>
          put({
            cond: { ...read, blocks: read.blocks.map((x, j) => (j === bi ? { ...x, shape } : x)) },
          }),
        ),
      ),
    });
  }
  if (calc.kind === "값" && calc.parts.length) return sentence(refAt(0));
  if (calc.kind === "할증" && calc.parts.length >= 2) {
    return sentence(refAt(0), tx("Mark1"), refAt(1), tx("Mark2"));
  }
  if ((calc.kind === "곱나눔" || calc.kind === "더하기") && calc.parts.length) {
    const ops = calc.kind === "곱나눔" ? ["*", "/"] : ["+", "-"];
    const glyph = (o: string): string =>
      tx(o === "*" ? "Mul" : o === "/" ? "Div" : o === "+" ? "Plus" : "Minus");
    const out: (HTMLElement | string)[] = [refAt(0)];
    calc.parts.slice(1).forEach((_, i) => {
      const op = calc.ops?.[i] ?? ops[0];
      const choices = ops.map((o) => ({ value: o, text: glyph(o) }));
      out.push(
        selectBox(
          ctx,
          choices,
          op,
          (v) =>
            put({
              ops: calc.parts
                .slice(1)
                .map((_, j) => (j === i ? v : (calc.ops?.[j] ?? ops[0])) as "*" | "/" | "+" | "-"),
            }),
          tx("S3"),
        ),
        refAt(i + 1),
      );
    });
    return sentence(...out);
  }
  return sentence(note(tx("Steps")));
}

export function calcView(ctx: Ctx, calc: LbCalc, n: number): HTMLElement {
  return el("li", {
    className: "m01-lbsteps-row",
    children: [
      sentence(
        span("m01-lbsteps-name", `${tx("Calc")}${n}`),
        chip(placeText(ctx, calc)),
        valueNote(middleOf(ctx, calc.name)),
      ),
      calcBody(ctx, calc),
    ],
  });
}