/* =============================================================================
 * M02_DF_Verify.ts
 * 흐름도 검증 칸(오른쪽 아래) — 끊긴 곳 목록(누르면 그 상자 · 선을 고름) + 「설계 때 정할 것」 전부:
 *   변수 예시값 · 재료 선택 자리(범위 안 자재 목록에서 고르기 · 찾기 · 쪽) · 재료 조건 자리(지금 잡힌 품목 · 0 · 여럿 까닭)
 *   · 이어지지 않은 다른 로직의 받는 알약. 바꾸면 on.change(고친 다이어그램) · 줄을 누르면 on.select.
 * 모양은 docs/raw/M01_쉬운단가/흐름도_정함.md 4 · 5 · 6 · 8 · 13. 이 폴더째 지워도 됨.
 * ========================================================================== */

import { currentLanguageIndex } from "@ui/ui_template_locale";
import { createButton, createSelectField, el } from "@ui/ui_template_elements";
import { formatMoney } from "../../M01_MasterData/M01_MasterData_UI_Logic_Money";
import { breaks, type CfEvalOptions, type CfEvalResult, type CfValues } from "./M02_DF_Eval";
import { findMaterials, materialOf, priceOf, type CfMat } from "./M02_DF_Material";
import {
  designInputs,
  elementPort,
  type CfBox,
  type CfElementRef,
  type CfLogic,
  type CfVariable,
} from "./M02_DF_Model";
import "./M02_DF_Verify.css";

const TEXT = {
  Breaks: ["끊긴 곳", "Broken spots"],
  BreaksHint: ["누르면 그 상자 · 선을 고름", "Click to select the box or line"],
  Design: ["설계 때 정할 것", "To decide at design time"],
  DesignHint: ["여기서 바꾸면 그 상자도 바뀜", "Changing here changes the box too"],
  Vars: ["변수 예시값", "Variable samples"],
  Slots: ["재료 선택 자리", "Material choice"],
  Rules: ["재료 조건 자리", "Material by condition"],
  Logics: ["이어지지 않은 다른 로직 값(예시값)", "Unlinked values of other logics (samples)"],
  Choose: ["고르기", "Choose"],
  Close: ["닫기", "Close"],
  Find: ["찾기", "Find"],
  Prev: ["이전", "Prev"],
  Next: ["다음", "Next"],
  Search: ["재료 이름 · 규격", "Material name or size"],
  Page: ["쪽 {p} / {n} · 모두 {t}", "Page {p} / {n} · {t} in all"],
  NoHit: ["찾은 재료 없음", "No material found"],
  NoDefault: ["아직 고르지 않음", "Nothing chosen yet"],
  Price: ["단가", "Unit price"],
  Won: ["원", "KRW"],
  Loading: ["찾는 중", "Searching"],
  NeedValue: ["조건 값이 아직 없음", "The condition value is not there yet"],
  Caught: ["잡힌 품목", "Matched item"],
  Zero: ["맞는 재료 없음(0)", "No matching material (0)"],
  Many: ["여럿 맞음({n}) — 첫째를 씀", "{n} match — the first is used"],
  Cond: ["{field}에 「{v}」 {op}", "{field} {op} “{v}”"],
  Pick: ["선택", "Choose"],
  Bad: ["숫자를 넣어야 함", "Enter a number"],
  Range: ["{a} ∼ {b} 사이", "between {a} and {b}"],
  Cant: ["지금은 바꿀 수 없음", "Cannot change this now"],
  OwnSample: ["비우면 그 로직 예시값", "Empty = the logic's own sample"],
  OtherLogic: [
    "이어 주지 않아 그 로직의 예시값을 씀",
    "Not linked — the logic's own sample is used",
  ],
} as const;

type TextKey = keyof typeof TEXT;
const tv = (key: TextKey, fill: Record<string, string | number> = {}): string =>
  TEXT[key][currentLanguageIndex === 1 ? 1 : 0].replace(/\{(\w+)\}/g, (m, k: string) =>
    k in fill ? String(fill[k]) : m,
  );

/** 고른 상자 · 알약 · 선 — 다이어그램이 이 모양으로 고름 */
export interface CfSel {
  box: string;
  port?: string;
  link?: string;
}

export interface CfVerifyOn {
  change(lg: CfLogic): void;
  select?(sel: CfSel): void;
}

const PAGE = 10;

/** 재료 요소 하나 고치기 — 나머지는 그대로 */
function withElement(
  lg: CfLogic,
  boxId: string,
  name: string,
  patch: Partial<CfElementRef>,
): CfLogic {
  return {
    ...lg,
    boxes: lg.boxes.map((b) =>
      b.id === boxId && b.input
        ? {
            ...b,
            input: {
              ...b.input,
              elements: b.input.elements.map((e) => (e.name === name ? { ...e, ...patch } : e)),
            },
          }
        : b,
    ),
  };
}

const matText = (m: CfMat): string =>
  `${m.name}${m.spec ? ` ${m.spec}` : ""}${m.unit ? ` · ${m.unit}` : ""}`;

/** 변수 예시값 칸 */
function sampleField(
  v: CfVariable,
  put: (value: number | string) => void,
  msg: HTMLElement,
): HTMLElement {
  const label = el("span", { text: v.unit && v.unit !== "-" ? `${v.name} (${v.unit})` : v.name });
  let control: HTMLElement;
  if (v.type === "choice" && v.choices?.length) {
    control = createSelectField({
      options: [
        { value: "", text: tv("Pick") },
        ...v.choices.map((c) => ({ value: String(c), text: String(c) })),
      ],
      value: v.example === null ? "" : String(v.example),
      compact: true,
      ariaLabel: v.name,
      onChange: (s) => {
        const hit = v.choices?.find((c) => String(c) === s);
        if (hit !== undefined) put(hit);
      },
    }).root;
  } else {
    const box = el("input", {
      className: "m02-dfver__input",
      attrs: {
        type: "text",
        inputmode: v.type === "number" ? "decimal" : "text",
        "aria-label": v.name,
      },
    });
    if (v.range) box.placeholder = tv("Range", { a: v.range[0], b: v.range[1] });
    box.value = v.example === null ? "" : String(v.example);
    box.addEventListener("change", () => {
      const raw = box.value.trim();
      if (raw === "") return;
      if (v.type !== "number") return put(raw);
      const n = Number(raw);
      if (Number.isNaN(n)) msg.textContent = tv("Bad");
      else put(n);
    });
    control = box;
  }
  return el("label", { className: "m02-dfver__field", children: [label, control] });
}

/** 재료 선택 자리 한 줄 — 지금 품목 · 단가 · 「고르기」(찾기 · 쪽) */
function slotRow(box: CfBox, e: CfElementRef, on: CfVerifyOn, lg: CfLogic): HTMLElement {
  const now = el("span", { className: "m02-dfver__now", text: e.default ? "…" : tv("NoDefault") });
  const price = el("span", { className: "m02-dfver__price" });
  if (e.default) {
    void materialOf(e.default).then((m) => (now.textContent = m ? matText(m) : (e.default ?? "")));
    void priceOf(e.default).then((p) => {
      price.textContent = p === null ? "" : `${tv("Price")} ${formatMoney(p)} ${tv("Won")}`;
    });
  }
  const panel = el("div", { className: "m02-dfver__panel" });
  panel.hidden = true;
  const q = el("input", {
    className: "m02-dfver__input",
    attrs: { type: "text", placeholder: tv("Search"), "aria-label": tv("Search") },
  });
  q.value = e.scope?.찾는말 ?? "";
  const list = el("ul", { className: "m02-dfver__list" });
  const pager = el("div", { className: "m02-dfver__pager" });
  let page = 1;
  const load = async (): Promise<void> => {
    list.replaceChildren(el("li", { className: "m02-dfver__muted", text: tv("Loading") }));
    const got = await findMaterials({
      q: q.value.trim(),
      sub: e.scope?.구분,
      detail: e.scope?.상세구분,
      page,
      size: PAGE,
    });
    const pages = Math.max(1, Math.ceil(got.total / PAGE));
    list.replaceChildren(
      ...(got.items.length
        ? got.items.map((m) =>
            el("li", {
              children: [
                createButton({
                  label: matText(m),
                  variant: "ghost",
                  size: "sm",
                  onClick: () => on.change(withElement(lg, box.id, e.name, { default: m.ref })),
                }),
              ],
            }),
          )
        : [el("li", { className: "m02-dfver__muted", text: tv("NoHit") })]),
    );
    pager.replaceChildren(
      createButton({
        label: tv("Prev"),
        size: "sm",
        variant: "ghost",
        disabled: page <= 1,
        onClick: () => {
          page--;
          void load();
        },
      }),
      el("span", {
        className: "m02-dfver__muted",
        text: tv("Page", { p: got.page, n: pages, t: got.total }),
      }),
      createButton({
        label: tv("Next"),
        size: "sm",
        variant: "ghost",
        disabled: page >= pages,
        onClick: () => {
          page++;
          void load();
        },
      }),
    );
  };
  q.addEventListener("keydown", (ev) => {
    if (ev.key === "Enter") {
      page = 1;
      void load();
    }
  });
  const toggle = createButton({
    label: tv("Choose"),
    size: "sm",
    onClick: () => {
      panel.hidden = !panel.hidden;
      toggle.querySelector(".ui-btn__label")!.textContent = panel.hidden
        ? tv("Choose")
        : tv("Close");
      if (!panel.hidden) void load();
    },
  });
  panel.append(
    el("div", {
      className: "m02-dfver__search",
      children: [
        q,
        createButton({
          label: tv("Find"),
          size: "sm",
          onClick: () => {
            page = 1;
            void load();
          },
        }),
      ],
    }),
    list,
    pager,
  );
  return el("div", {
    className: "m02-dfver__item",
    children: [
      el("div", {
        className: "m02-dfver__line",
        children: [el("strong", { text: elementPort(e) }), now, price, toggle],
      }),
      panel,
    ],
  });
}

/** 재료 조건 자리 한 줄 — 지금 잡힌 품목 · 맞는 것 0 · 여럿이면 까닭 */
function ruleRow(e: CfElementRef, lg: CfLogic, result: CfEvalResult): HTMLElement {
  const rule = e.rule!;
  const raw = result.ports[rule.from.box]?.[rule.from.name];
  const value = Array.isArray(raw) || raw === null || raw === undefined ? "" : String(raw);
  const state = el("span", {
    className: "m02-dfver__now",
    text: value ? tv("Loading") : tv("NeedValue"),
  });
  const note = el("span", { className: "m02-dfver__muted" });
  if (value) {
    void findMaterials({
      q: e.scope?.찾는말,
      sub: e.scope?.구분,
      detail: e.scope?.상세구분,
      size: 100,
    }).then((got) => {
      const hit = got.items.filter((m) => {
        const t = rule.field === "규격" ? m.spec : m.name;
        return rule.op === "같음" ? t === value : t.includes(value);
      });
      const first = hit[0];
      state.className = `m02-dfver__now${hit.length === 1 ? "" : " m02-dfver__warn"}`;
      state.textContent = !first ? tv("Zero") : `${tv("Caught")}: ${matText(first)}`;
      note.textContent = hit.length > 1 ? tv("Many", { n: hit.length }) : "";
    });
  }
  const from = lg.boxes.find((b) => b.id === rule.from.box)?.name ?? "";
  return el("div", {
    className: "m02-dfver__item",
    children: [
      el("div", {
        className: "m02-dfver__line",
        children: [el("strong", { text: elementPort(e) }), state, note],
      }),
      el("span", {
        className: "m02-dfver__muted",
        text: `${from ? `${from} · ` : ""}${tv("Cond", { field: rule.field, v: value || rule.from.name, op: rule.op })}`,
      }),
    ],
  });
}

/** 검증 칸 — values = 받은 입력 값(끊긴 곳 검사가 씀) */
export function renderVerify(
  host: HTMLElement,
  lg: CfLogic,
  result: CfEvalResult,
  on: CfVerifyOn,
  opts: { values?: CfValues; logics?: CfEvalOptions["logics"] } = {},
): void {
  const msg = el("p", { className: "m02-dfver__msg" });
  const safe = (make: () => CfLogic): void => {
    msg.textContent = "";
    try {
      on.change(make());
    } catch {
      msg.textContent = tv("Cant");
    }
  };

  /* 끊긴 곳 */
  const spots = breaks(lg, opts.values ?? {}, { logics: opts.logics });
  const spotBlock = spots.length
    ? [
        el("div", {
          className: "m02-dfver__block m02-dfver__breaks",
          children: [
            el("strong", { text: tv("Breaks") }),
            el("ul", {
              className: "m02-dfver__list",
              children: spots.map((s) =>
                el("li", {
                  children: [
                    createButton({
                      label: s.text,
                      variant: "ghost",
                      size: "sm",
                      disabled: !s.box || !on.select,
                      onClick: () => on.select?.({ box: s.box, port: s.port, link: s.link }),
                    }),
                  ],
                }),
              ),
            }),
            el("p", { className: "m02-dfver__muted", text: tv("BreaksHint") }),
          ],
        }),
      ]
    : [];

  /* 설계 때 정할 것 — Model `designInputs`(변수 · 재료 자리 · 다른 로직) + 재료 조건 자리 */
  const designs = designInputs(lg);
  const boxOf = (id: string): CfBox | undefined => lg.boxes.find((b) => b.id === id);
  /** 변수 예시값을 그 상자(입력 · 함수)의 변수에 되적음 */
  const putExample = (box: string, name: string, value: number | string): CfLogic => ({
    ...lg,
    boxes: lg.boxes.map((x) => {
      if (x.id !== box) return x;
      const set = (list: CfVariable[]): CfVariable[] =>
        list.map((y) => (y.name === name ? { ...y, example: value } : y));
      return {
        ...x,
        ...(x.input ? { input: { ...x.input, variables: set(x.input.variables) } } : {}),
        ...(x.func ? { func: { ...x.func, variables: set(x.func.variables) } } : {}),
      };
    }),
  });
  const vars = designs.flatMap((d) =>
    d.kind === "변수" && d.variable
      ? [sampleField(d.variable, (value) => safe(() => putExample(d.box, d.port, value)), msg)]
      : [],
  );
  const slots = designs.flatMap((d) => {
    const box = boxOf(d.box);
    return d.kind === "재료 자리" && d.element && box
      ? [slotRow(box, d.element, { ...on, change: (n) => safe(() => n) }, lg)]
      : [];
  });
  const inputs = lg.boxes.filter((b) => b.kind === "input" && b.input);
  const rules = inputs.flatMap((b) =>
    (b.input?.elements ?? [])
      .filter((e) => e.mode === "rule" && e.rule)
      .map((e) => ruleRow(e, lg, result)),
  );
  /** 다른 로직의 받는 알약 — 예시값을 적으면 logic.examples · 비우면 그 로직 자기 예시값 */
  const putLogicExample = (box: string, port: string, raw: string): CfLogic => ({
    ...lg,
    boxes: lg.boxes.map((x) => {
      if (x.id !== box || !x.input?.logic) return x;
      const examples = { ...x.input.logic.examples };
      const text = raw.trim();
      if (text === "") delete examples[port];
      else examples[port] = Number.isNaN(Number(text)) ? text : Number(text);
      return { ...x, input: { ...x.input, logic: { ...x.input.logic, examples } } };
    }),
  });
  const logics = designs.flatMap((d) => {
    if (d.kind !== "다른 로직") return [];
    const input = el("input", {
      className: "m02-dfver__input",
      attrs: { type: "text", placeholder: tv("OwnSample"), "aria-label": d.port },
    });
    input.value = d.example === null || d.example === undefined ? "" : String(d.example);
    input.addEventListener("change", () => safe(() => putLogicExample(d.box, d.port, input.value)));
    const unit = d.unit && d.unit !== "-" ? ` (${d.unit})` : "";
    return [
      el("li", {
        className: "m02-dfver__line",
        children: [
          createButton({
            label: `${boxOf(d.box)?.name ?? ""} · ${d.port}${unit}`,
            variant: "ghost",
            size: "sm",
            disabled: !on.select,
            onClick: () => on.select?.({ box: d.box, port: d.port }),
          }),
          input,
        ],
      }),
    ];
  });
  const group = (title: TextKey, body: HTMLElement[]): HTMLElement[] =>
    body.length
      ? [
          el("div", {
            className: "m02-dfver__group",
            children: [el("strong", { text: tv(title) }), ...body],
          }),
        ]
      : [];
  const design = [
    ...group(
      "Vars",
      [el("div", { className: "m02-dfver__fields", children: vars })].filter(() => vars.length),
    ),
    ...group("Slots", slots),
    ...group("Rules", rules),
    ...group(
      "Logics",
      logics.length ? [el("ul", { className: "m02-dfver__list", children: logics })] : [],
    ),
  ];
  host.replaceChildren(
    ...spotBlock,
    ...(design.length
      ? [
          el("div", {
            className: "m02-dfver__block",
            children: [
              el("strong", { className: "m02-dfver__title", text: tv("Design") }),
              ...design,
              el("p", { className: "m02-dfver__muted", text: tv("DesignHint") }),
              msg,
            ],
          }),
        ]
      : []),
  );
}