/* =============================================================================
 * M02_MasterTemplete_TreePanel_Dialogs.ts
 * 구조물 라이브러리 오른쪽 클릭 메뉴가 띄우는 작은 창 — 글 받기 · 옮길 폴더 고르기 · 저장/버림 물음.
 * 모두 약속(Promise)으로 답함 — 닫기 · Esc · 바깥 누르기 = 취소(null / "cancel").
 * ========================================================================== */

import { createButton, createInputField, createSelectField, el } from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import { openModal } from "@ui/ui_template_modal";

export interface TextField {
  key: string;
  label: string;
  value?: string;
  /** 비워도 됨 — 아니면 비운 채 [확인] 하면 그 칸에 안내 글 */
  optional?: boolean;
}

/** 글 칸 하나 이상을 받음 — 확인이면 칸 이름 → 글(앞뒤 공백 뺌) */
export function askText(
  title: string,
  fields: TextField[],
  okLabel = L("M02_TreeOk"),
): Promise<Record<string, string> | null> {
  return new Promise((resolve) => {
    let done = false;
    const finish = (value: Record<string, string> | null): void => {
      if (done) return;
      done = true;
      resolve(value);
    };
    openModal({
      title,
      closeLabel: L("M02_Close"),
      dialogClass: "m02-modal m02-treedlg",
      beforeClose: () => (finish(null), true),
      mount: (body, close) => {
        const inputs = fields.map((f) => ({
          f,
          field: createInputField({ label: f.label, value: f.value }),
        }));
        const ok = createButton({ label: okLabel, variant: "filled" });
        const submit = (): void => {
          // 빈 칸은 그 칸에 빨간 테두리 + 한 줄(칸마다) — 토스트는 창 뒤에 가려 안 보였음
          const out: Record<string, string> = {};
          let bad = false;
          for (const { f, field } of inputs) {
            out[f.key] = field.input.value.trim();
            const empty = !out[f.key] && !f.optional;
            field.setError(empty ? L("M02_FieldNeeded").replace("{label}", f.label) : undefined);
            bad ||= empty;
          }
          if (bad) return;
          finish(out);
          close();
        };
        ok.addEventListener("click", submit);
        for (const { field } of inputs) {
          field.input.addEventListener("input", () => field.setError(undefined));
          field.input.addEventListener("keydown", (event) => {
            if (event.key === "Enter" && !event.isComposing) submit();
          });
        }
        body.append(...inputs.map(({ field }) => field.root), ok);
        inputs[0]?.field.input.select();
      },
    });
  });
}

/** 옮길 폴더 고르기 — `folders` 에서 `blocked` 인 것은 뺌 · 맨 위(폴더 밖)는 늘 있음 */
export function askFolder(
  title: string,
  folders: string[][],
  blocked: (path: string[]) => boolean,
  current: string[],
): Promise<string[] | null> {
  return new Promise((resolve) => {
    let done = false;
    const finish = (value: string[] | null): void => {
      if (done) return;
      done = true;
      resolve(value);
    };
    const choices = [[], ...folders.filter((path) => !blocked(path))];
    openModal({
      title,
      closeLabel: L("M02_Close"),
      dialogClass: "m02-modal m02-treedlg",
      beforeClose: () => (finish(null), true),
      mount: (body, close) => {
        const field = createSelectField({
          label: L("M02_TreeMoveTo"),
          options: choices.map((path, i) => ({
            value: String(i),
            text: path.length ? path.join(" / ") : L("M02_TreeTop"),
          })),
          value: String(choices.findIndex((path) => path.join("|") === current.join("|"))),
        });
        const ok = createButton({ label: L("M02_TreeOk"), variant: "filled" });
        ok.addEventListener("click", () => {
          finish(choices[Number(field.select.value)] ?? []);
          close();
        });
        body.append(field.root, ok);
      },
    });
  });
}

export type Settle = "save" | "discard" | "cancel";

/** 저장 안 한 표 고침 — 저장하고 계속 · 버리고 계속 · 취소 */
export function askSettle(): Promise<Settle> {
  return new Promise((resolve) => {
    let done = false;
    const finish = (value: Settle): void => {
      if (done) return;
      done = true;
      resolve(value);
    };
    openModal({
      title: L("M02_TreeUnsaved"),
      closeLabel: L("M02_TreeCancel"),
      dialogClass: "m02-modal m02-treedlg",
      beforeClose: () => (finish("cancel"), true),
      mount: (body, close) => {
        const choose = (value: Settle) => () => {
          finish(value);
          close();
        };
        const save = createButton({ label: L("M02_TreeSaveGo"), variant: "filled" });
        const discard = createButton({ label: L("M02_TreeDiscardGo"), variant: "danger" });
        const cancel = createButton({ label: L("M02_TreeCancel"), variant: "ghost" });
        save.addEventListener("click", choose("save"));
        discard.addEventListener("click", choose("discard"));
        cancel.addEventListener("click", choose("cancel"));
        body.append(el("div", { className: "m02-side__row", children: [save, discard, cancel] }));
      },
    });
  });
}