/* =============================================================================
 * Z01_MasterData_UI_WorkItem_Rows.ts
 * 공종 편집 아래쪽 — 구성 줄 표(갈래별) · 자원 찾기(기초단가 검색) · 품셈 원문 표 + [주](읽기 전용)
 *
 * 칸을 고치면 초안(`WorkItemBody`)만 바꿈 — 서버엔 [저장] 때 전체 줄을 한 번에 보냄(PLAN 1-0).
 * 못 맞춘 줄(resource_key 없음)은 또렷이 — 자원 찾기로 기초단가 줄을 골라 이음.
 * ========================================================================== */

import { createButton, el, showToast } from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import {
  fetchBasePrices,
  type ResourceKind,
  type WorkItemDetail,
  type WorkItemRow,
} from "./Z01_MasterData_Api_Fetch";
import { cellText, latestOnly } from "./Z01_MasterData_UI_Cells";
import {
  addRow,
  changedFields,
  groupByVariant,
  type DraftRow,
  type WorkItemBody,
} from "./Z01_MasterData_UI_Draft";

type LocaleKey = Parameters<typeof L>[0];

const KIND_LABEL: Record<ResourceKind, LocaleKey> = {
  labor: "Z01_WorkItem_Kind_Labor",
  machine: "Z01_WorkItem_Kind_Machine",
  material: "Z01_WorkItem_Kind_Material",
  etc: "Z01_WorkItem_Kind_Etc",
};

/**
 * 자원 찾기 — resource_kind 가 기초단가 kind 이름과 같음(노임·기계·자재 · 기타는 기초단가에 없음).
 * 이름·규격 칸은 서버 `row_label` 과 같은 칸을 씀.
 */
type Findable = Exclude<ResourceKind, "etc">;
const FINDABLE: Record<Findable, { name: string; spec?: string }> = {
  labor: { name: "occupation_name" },
  machine: { name: "machine_name", spec: "specification" },
  material: { name: "classification_name", spec: "specification" },
};
const FIND_SIZE = 20;
const SEARCH_DELAY_MS = 300;

const COLUMNS: LocaleKey[] = [
  "Z01_WorkItem_Col_Kind",
  "Z01_WorkItem_Col_Resource",
  "Z01_WorkItem_Col_Spec",
  "Z01_WorkItem_Col_Key",
  "Z01_WorkItem_Col_Amount",
  "Z01_WorkItem_Col_Unit",
  "Z01_WorkItem_Col_Alt",
  "Z01_WorkItem_Col_Ratio",
  "Z01_WorkItem_Col_Raw",
  "Z01_WorkItem_Col_Table",
  "Z01_WorkItem_Col_Delete",
];

let tmpSeq = 0;
const tmpId = (): string => `new-${Date.now()}-${++tmpSeq}`;

/** rebuild = 줄 수·갈래·자원이 바뀜(다시 그림) · false = 칸 값만 바뀜(초점 지킴) */
export type RowsChanged = (rebuild: boolean) => void;

export function renderWorkRows(
  body: WorkItemBody,
  detail: WorkItemDetail,
  changed: RowsChanged,
): HTMLElement {
  const finder = buildFinder(() => changed(true));
  const box = el("div", {
    className: "z01-wi__rows",
    children: [el("h3", { className: "z01-wi__heading", text: L("Z01_WorkItem_Rows") })],
  });
  const groups = groupByVariant(body.rows);
  // 줄이 하나도 없는 공종(입력 필요) — 갈래 없는 빈 묶음 하나로 [줄 추가] 를 세움.
  if (!groups.length) groups.push({ variant: "", indexes: [] });
  for (const group of groups) box.append(variantBlock(group.variant, group.indexes));

  const variantInput = el("input", {
    className: "ui-input",
    attrs: { placeholder: L("Z01_WorkItem_VariantName") },
  });
  const addVariant = createButton({
    label: L("Z01_WorkItem_AddVariant"),
    variant: "ghost",
    onClick: () => {
      const name = variantInput.value.trim();
      if (!name) return;
      addRow(body, name, tmpId());
      changed(true);
    },
  });
  box.append(
    el("div", { className: "z01-master__toolbar", children: [variantInput, addVariant] }),
    finder.root,
  );
  return box;

  function variantBlock(variant: string, indexes: number[]): HTMLElement {
    const head = el("tr", { children: COLUMNS.map((key) => el("th", { text: L(key) })) });
    const table = el("table", {
      className: "z01-master__grid z01-wi__grid",
      children: [
        el("thead", { children: [head] }),
        el("tbody", { children: indexes.map((index) => rowLine(body.rows[index])) }),
      ],
    });
    const add = createButton({
      label: L("Z01_MasterData_AddRow"),
      variant: "ghost",
      onClick: () => {
        addRow(body, variant, tmpId());
        changed(true);
      },
    });
    return el("div", {
      className: "z01-wi__group",
      children: [
        el("h4", { className: "z01-wi__variant", text: variant || L("Z01_WorkItem_NoVariant") }),
        el("div", { className: "z01-master__grid-wrap", children: [table] }),
        add,
      ],
    });
  }

  function rowLine(row: DraftRow): HTMLElement {
    const tr = el("tr");
    const cells: [keyof WorkItemRow, HTMLElement][] = [];
    // 고친 칸 표시 — 저장 전(초안 · 새 줄은 줄째) · 저장했고 초기값과 다름(서버 changed_columns)
    const saved = row.changed_columns ?? [];
    tr.classList.toggle("is-added", Boolean(row.is_added));
    const mark = (): void => {
      const diff = changedFields(row, detail.rows);
      tr.classList.toggle("is-new", diff === "added");
      tr.classList.toggle("is-deleted", Boolean(row.deleted));
      for (const [field, td] of cells) {
        const draft = diff !== "added" && diff.has(field);
        td.classList.toggle("is-draft", draft);
        td.classList.toggle("is-changed", !draft && saved.includes(field));
      }
    };
    const cell = (field: keyof WorkItemRow, ...children: (HTMLElement | string)[]) => {
      const td = el("td", { children });
      cells.push([field, td]);
      tr.append(td);
      return td;
    };
    const set = (field: keyof WorkItemRow, value: unknown): void => {
      (row as unknown as Record<string, unknown>)[field] = value;
      mark();
      changed(false);
    };
    const text = (field: "resource_name" | "resource_spec" | "amount_unit") => {
      const input = el("input", { className: "ui-input" });
      input.value = row[field] ?? "";
      input.addEventListener("change", () => set(field, input.value.trim()));
      return input;
    };
    const number = (
      field: "amount" | "alternative_amount" | "group_ratio_pct",
    ): HTMLInputElement => {
      const input = el("input", {
        className: "ui-input",
        attrs: { type: "number", min: "0", step: "any" },
      });
      input.value = row[field] == null ? "" : String(row[field]);
      input.addEventListener("change", () => {
        const raw = input.value.trim();
        set(field, raw === "" ? null : Number(raw));
      });
      return input;
    };

    const kind = el("select", { className: "ui-select" });
    for (const each of Object.keys(KIND_LABEL) as ResourceKind[]) {
      kind.append(new Option(L(KIND_LABEL[each]), each));
    }
    kind.value = row.resource_kind;
    // 종류가 바뀌면 이은 열쇠는 다른 표의 것 — 풀어 두고 다시 찾게 함.
    kind.addEventListener("change", () => {
      row.resource_kind = kind.value as ResourceKind;
      row.resource_key = null;
      changed(true);
    });
    cell("resource_kind", kind);
    cell("resource_name", text("resource_name"));
    cell("resource_spec", text("resource_spec"));
    const key = row.resource_key
      ? el("span", { text: row.resource_key })
      : el("span", { className: "z01-wi__unmatched", text: L("Z01_WorkItem_Unmatched") });
    const find = createButton({
      label: L("Z01_WorkItem_Find"),
      variant: "ghost",
      disabled: row.resource_kind === "etc",
      onClick: () => finder.open(row),
    });
    cell("resource_key", key, find);
    cell("amount", number("amount"));
    cell("amount_unit", text("amount_unit"));
    cell("alternative_amount", number("alternative_amount"));
    cell("group_ratio_pct", number("group_ratio_pct"));
    cell(
      "raw_cell",
      el("span", { text: row.raw_cell ?? "", attrs: { title: row.raw_cell ?? "" } }),
    );
    cell("pum_table_id", row.pum_table_id ?? "");
    const drop = createButton({
      label: L(row.deleted ? "Z01_MasterData_UndeleteRow" : "Z01_MasterData_DeleteRow"),
      variant: "ghost",
      onClick: () => {
        // 새 줄은 바로 뺌 · 서버 줄은 줄 긋고 [저장] 때 뺌(되살릴 수 있게)
        if (row.id === undefined) body.rows.splice(body.rows.indexOf(row), 1);
        else row.deleted = !row.deleted;
        changed(true);
      },
    });
    tr.append(el("td", { children: [drop] }));
    mark();
    return tr;
  }
}

/** 자원 찾기 상자 — 기초단가 검색 API 로 찾아 한 줄을 고르면 그 줄에 열쇠·이름·규격을 넣음. */
function buildFinder(picked: () => void): { root: HTMLElement; open: (row: DraftRow) => void } {
  let target: DraftRow | null = null;
  let timer = 0;
  const search = latestOnly(fetchBasePrices);
  const title = el("strong");
  const kind = el("select", { className: "ui-select" });
  for (const each of Object.keys(FINDABLE) as Findable[]) {
    kind.append(new Option(L(KIND_LABEL[each]), each));
  }
  const input = el("input", {
    className: "ui-input",
    attrs: { type: "search", placeholder: L("Z01_MasterData_Search") },
  });
  const results = el("div", { className: "z01-wi__found" });
  const close = createButton({
    label: L("Z01_WorkItem_FindClose"),
    variant: "ghost",
    onClick: () => {
      root.hidden = true;
    },
  });
  const root = el("div", {
    className: "z01-wi__finder",
    children: [
      title,
      el("div", { className: "z01-master__toolbar", children: [kind, input, close] }),
      results,
    ],
  });
  root.hidden = true;
  kind.addEventListener("change", () => void run());
  input.addEventListener("input", () => {
    window.clearTimeout(timer);
    timer = window.setTimeout(() => void run(), SEARCH_DELAY_MS);
  });

  async function run(): Promise<void> {
    const from = kind.value as Findable;
    let data;
    try {
      data = await search(from, { page: 1, size: FIND_SIZE, q: input.value.trim() });
    } catch (error) {
      showToast(error instanceof Error ? error.message : L("Z01_MasterData_LoadFailed"), "error");
      return;
    }
    if (!data) return;
    const fields = FINDABLE[from];
    results.replaceChildren(
      ...(data.rows.length
        ? data.rows.map((row) => {
            const name = cellText(row[fields.name]);
            const spec = fields.spec ? cellText(row[fields.spec]) : "";
            const button = el("button", {
              className: "z01-wi__item",
              attrs: { type: "button" },
              children: [
                el("span", { className: "z01-wi__item-name", text: `${name} ${spec}`.trim() }),
                el("span", { className: "z01-master__key", text: cellText(row["@id"]) }),
              ],
            });
            button.addEventListener("click", () => {
              if (!target) return;
              target.resource_kind = from;
              target.resource_key = String(row["@id"]);
              target.resource_name = name;
              target.resource_spec = spec;
              root.hidden = true;
              picked();
            });
            return button;
          })
        : [el("p", { className: "z01-master__note", text: L("Z01_WorkItem_FindNone") })]),
    );
  }

  function open(row: DraftRow): void {
    target = row;
    kind.value = row.resource_kind === "etc" ? "material" : row.resource_kind;
    input.value = row.resource_name;
    title.textContent = `${L("Z01_WorkItem_FindTitle")} — ${row.resource_name || row.raw_cell || ""}`;
    results.replaceChildren();
    root.hidden = false;
    root.scrollIntoView({ block: "nearest" });
    void run();
  }

  return { root, open };
}

/** 품셈 원문 표 + [주] — 읽기 전용(값을 고칠 때 옆에 두고 봄). */
export function renderSource(detail: WorkItemDetail): HTMLElement {
  const box = el("div", {
    className: "z01-wi__source",
    children: [el("h3", { className: "z01-wi__heading", text: L("Z01_WorkItem_Source") })],
  });
  if (!detail.source.length) {
    box.append(el("p", { className: "z01-master__note", text: L("Z01_WorkItem_NoSource") }));
  }
  for (const table of detail.source) {
    const caption = [table.pum_table_id, table.section, table.pum_form].filter(Boolean).join(" · ");
    const heads = cells(table.condition_note);
    const rows = Array.isArray(table.raw_row) ? (table.raw_row as unknown[]) : [];
    const grid = el("table", { className: "z01-master__grid" });
    if (heads.length) {
      grid.append(
        el("thead", {
          children: [el("tr", { children: heads.map((h) => el("th", { text: h })) })],
        }),
      );
    }
    grid.append(
      el("tbody", {
        children: rows.map((row) =>
          el("tr", {
            children: cells(row).map((c) => el("td", { text: c, attrs: { title: c } })),
          }),
        ),
      }),
    );
    box.append(
      el("h4", { className: "z01-wi__variant", text: caption }),
      el("div", { className: "z01-master__grid-wrap", children: [grid] }),
    );
  }
  const notes = detail.notes ?? [];
  if (notes.length) {
    box.append(
      el("h4", { className: "z01-wi__variant", text: L("Z01_WorkItem_Notes") }),
      el("ul", {
        className: "z01-wi__notes",
        children: notes.map((note) => el("li", { text: noteText(note) })),
      }),
    );
  }
  return box;
}

/** 원문 칸 — 목록이면 칸마다 · 글자 하나면 한 칸. */
function cells(value: unknown): string[] {
  if (Array.isArray(value)) return value.map((each) => cellText(each));
  return value == null ? [] : [cellText(value)];
}

function noteText(note: unknown): string {
  if (note && typeof note === "object" && "text" in note) return cellText(note.text);
  return cellText(note);
}