import { ROUTES } from "@config/config_frontend";
import { attachCollapsible } from "@ui/ui_template_collapsible";
import {
  createButton,
  createTag,
  hideLoadingOverlay,
  showLoadingOverlay,
  showToast,
} from "@ui/ui_template_elements";
import { section } from "@ui/ui_template_general_blocks";
import { createGeneralLayout } from "@ui/ui_template_general_layout";
import { navigateTo } from "../A00_Common/router";
import {
  fetchAllCompanies,
  fetchAllUsers,
  fetchAuditLogs,
  fetchCompanyJoinRequests,
  fetchCompanyMembers,
  fetchCompanyProjects,
  fetchDashboardMe,
  fetchSystemResources,
  fetchUserCompany,
  fetchUserProjects,
  type AuditLog,
  type CompanyInfo,
  type DashboardUser,
  type JoinRequest,
  type Member,
  type ProjectItem,
  type ResourceData,
} from "./B01_Dashboard_Api_Fetch";
import { auditLogTable, userTable } from "./B01_Dashboard_UI_Admin";
import { L, roleLabel } from "./B01_Dashboard_UI_Common";
import {
  buildCompanyPanel,
  companyTable,
  joinRequestTable,
  memberTable,
} from "./B01_Dashboard_UI_Company";
import { openAddMemberModal, openCreateCompanyModal } from "./B01_Dashboard_UI_Modals";
import { buildProfileForm, buildSecurityForm } from "./B01_Dashboard_UI_Profile";
import { openCompanyPicker } from "./B01_Dashboard_UI_CompanyPick";
import { projectTable } from "./B01_Dashboard_UI_Projects";
import { buildResourcePanel } from "./B01_Dashboard_UI_Resources";
import { buildTempUploadSection } from "./B01_Dashboard_UI_TempUpload";
import "./B01_Dashboard_UI_Style.css";

export interface DashboardState {
  user: DashboardUser;
  userProjects: ProjectItem[];
  companyProjects: ProjectItem[];
  allProjects: ProjectItem[];
  company: CompanyInfo | null;
  members: Member[];
  joinRequests: JoinRequest[];
  allCompanies: CompanyInfo[];
  allUsers: DashboardUser[];
  allJoinRequests: JoinRequest[];
  auditLogs: AuditLog[];
  resources: ResourceData | null;
  /** 시스템 관리자가 고른 회사(29-1) — 프로젝트 · 사용자 · 가입 요청 · 회사 관리가 이 회사 것 */
  adminCompanyId: number | null;
}

/** 고른 회사 id 자리 — M02 도 같은 키를 읽음(이름 바꾸지 않음) */
const ADMIN_COMPANY_KEY = "aislo.adminCompany";

/** 고른 회사 — 저장값이 없거나 없는 회사면 자기 회사 */
function pickAdminCompany(user: DashboardUser, companies: CompanyInfo[]): number | null {
  const saved = Number(sessionStorage.getItem(ADMIN_COMPANY_KEY));
  if (companies.some((c) => c.id === saved)) return saved;
  return user.company_id ?? companies[0]?.id ?? null;
}

export async function renderB01Dashboard(root: HTMLElement): Promise<void> {
  showLoadingOverlay();
  try {
    const user = await fetchDashboardMe();
    const state: DashboardState = {
      user,
      userProjects: [],
      companyProjects: [],
      allProjects: [],
      company: null,
      members: [],
      joinRequests: [],
      allCompanies: [],
      allUsers: [],
      allJoinRequests: [],
      auditLogs: [],
      resources: null,
      adminCompanyId: null,
    };
    await loadRoleData(state);
    root.innerHTML = "";
    root.append(buildPage(state));
  } catch (error) {
    showToast(error instanceof Error ? error.message : L("B01_Dashboard_LoadFailed"), "error");
  } finally {
    hideLoadingOverlay();
  }
}

async function loadRoleData(state: DashboardState): Promise<void> {
  if (state.user.role === "SYSTEM_ADMIN") {
    // 회사 목록을 먼저 — 고른 회사를 가린 뒤 그 회사 것만 읽음(29-1)
    state.allCompanies = await fetchAllCompanies().catch(() => []);
    const companyId = pickAdminCompany(state.user, state.allCompanies);
    state.adminCompanyId = companyId;
    const results = await Promise.allSettled([
      fetchAllUsers(companyId),
      fetchCompanyJoinRequests(companyId),
      fetchAuditLogs(),
      fetchSystemResources(7),
      fetchCompanyProjects(companyId),
    ]);
    state.allUsers = results[0].status === "fulfilled" ? results[0].value : [];
    state.allJoinRequests = results[1].status === "fulfilled" ? results[1].value : [];
    state.auditLogs = results[2].status === "fulfilled" ? results[2].value : [];
    state.resources = results[3].status === "fulfilled" ? results[3].value : null;
    state.allProjects = results[4].status === "fulfilled" ? results[4].value : [];

    results.forEach((res, idx) => {
      if (res.status === "rejected") {
        console.error(`System Admin API failed at index ${idx}:`, res.reason);
      }
    });
    return;
  }
  const [projects, company] = await Promise.all([
    fetchUserProjects().catch(() => []),
    fetchUserCompany().catch(() => null),
  ]);
  state.userProjects = projects;
  state.company = company;
  if (state.user.role === "ADMIN") {
    const [members, requests, companyProjects] = await Promise.all([
      fetchCompanyMembers().catch(() => []),
      fetchCompanyJoinRequests().catch(() => []),
      fetchCompanyProjects().catch(() => []),
    ]);
    state.members = members;
    state.joinRequests = requests;
    state.companyProjects = companyProjects;
  }
}

/** 설정 카드 공용 양식 — 제목 + 한 줄 설명 · 누르면 이동 */
function settingCard(title: string, desc: string, go: () => void): HTMLElement {
  const card = document.createElement("button");
  card.type = "button";
  card.className = "b01-dashboard__setting-card";
  const head = document.createElement("strong");
  head.className = "b01-dashboard__setting-title";
  head.textContent = title;
  const sub = document.createElement("span");
  sub.className = "b01-dashboard__setting-desc";
  sub.textContent = desc;
  card.append(head, sub);
  card.addEventListener("click", go);
  return card;
}

/** 시스템 설정 — 역할로 카드 숨김 · M02 카드는 `?open=&root=` 로 진입(27-1d) */
function buildSystemSettingsPanel(user: DashboardUser, companyId: number | null): HTMLElement {
  const wrap = document.createElement("div");
  wrap.className = "b01-dashboard__setting-grid";
  // 시스템 관리자는 고른 회사를 해시에 실음(29-1)
  const company: Record<string, string> =
    user.role === "SYSTEM_ADMIN" && companyId ? { company: String(companyId) } : {};
  const m02 = (title: string, open: string, root: string, desc: string): HTMLElement =>
    settingCard(title, desc, () =>
      navigateTo(ROUTES.M02_MASTER_TEMPLATE, { open, root, ...company }),
    );
  if (user.role === "SYSTEM_ADMIN") {
    const desc = L("B01_Dashboard_PermMasterWrite");
    wrap.append(
      settingCard(L("B01_Dashboard_MasterElements"), L("B01_Dashboard_PermSourceRead"), () =>
        navigateTo(ROUTES.M01_MASTER_DATA),
      ),
      m02(L("B01_Dashboard_CardUnitCombo"), "일위대가", "master", desc),
      m02(L("B01_Dashboard_CardStructCombo"), "구조물조합", "master", desc),
      m02(L("B01_Dashboard_CardStructOption"), "옵션", "master", desc),
      m02(L("B01_Dashboard_CardDrawing"), "도면", "master", desc),
    );
    return wrap;
  }
  // 회사 수정 = 회사 관리자 · 회사 마스터(M02 accessFor 와 같은 규칙)
  const companyAdmin = user.role === "ADMIN" || user.is_master;
  const root = companyAdmin ? "company" : "personal";
  const desc = [
    L("B01_Dashboard_PermMasterRead"),
    L(companyAdmin ? "B01_Dashboard_PermCompanyWrite" : "B01_Dashboard_PermCompanyRead"),
    L("B01_Dashboard_PermPersonalWrite"),
  ].join(" · ");
  wrap.append(
    m02(L("B01_Dashboard_CardUnitCombo"), "일위대가", root, desc),
    m02(L("B01_Dashboard_CardStructCombo"), "구조물조합", root, desc),
  );
  return wrap;
}

/** 회사 알약(시스템 관리자만) — 컨테이너 제목 바로 옆 · 누르면 조회 후 고르기 · 고르면 저장 뒤 다시 읽음 */
function withCompanyPill(card: HTMLElement, state: DashboardState): HTMLElement {
  const name = state.allCompanies.find((c) => c.id === state.adminCompanyId)?.name ?? "-";
  const pill = document.createElement("button");
  pill.type = "button";
  pill.className = "ui-tag ui-tag--accent b01-dashboard__company-pill";
  pill.title = L("B01_Dashboard_PickCompany");
  pill.textContent = `${name} ▾`;
  pill.addEventListener("click", (event) => {
    // 제목 줄 누름 = 접힘 — 알약 누름은 올려 보내지 않음
    event.stopPropagation();
    openCompanyPicker(state.allCompanies, state.adminCompanyId, (company) => {
      sessionStorage.setItem(ADMIN_COMPANY_KEY, String(company.id));
      window.dispatchEvent(new HashChangeEvent("hashchange"));
    });
  });
  card.querySelector(".b01-dashboard__section-header > .ui-card__title")?.after(pill);
  return card;
}

/** 시스템 설정 컨테이너 — 모든 역할 · 한 줄 통째 · 제목 눌러 통째로 접힘 */
function buildSystemSettingsSection(state: DashboardState): HTMLElement {
  const { user } = state;
  const panel = buildSystemSettingsPanel(user, state.adminCompanyId);
  const card = section(L("B01_Dashboard_SystemSettings"), panel, true);
  if (user.role === "SYSTEM_ADMIN") withCompanyPill(card, state);
  card.querySelector(".ui-card__body")?.classList.add("ui-collapsible");
  card.querySelector(".b01-dashboard__section-header")?.classList.add("ui-collapsible__title");
  attachCollapsible(card);
  return card;
}

function buildPage(state: DashboardState): HTMLElement {
  // 제목·여백은 공용 템플릿을 따른다 (2026-09-06 사용자 지시) — B02 등 다른 화면과 같은 모양.
  const page = document.createElement("div");

  const grid = document.createElement("div");
  grid.className = "b01-dashboard__grid";

  if (state.user.role === "SYSTEM_ADMIN") {
    // 시스템 설정은 리소스 현황 아래(29-1) · 회사 알약이 붙은 컨테이너는 고른 회사 것
    const picked = state.allCompanies.filter((c) => c.id === state.adminCompanyId);
    grid.append(
      section(L("B01_Dashboard_Resources"), buildResourcePanel(state.resources), true),
      buildSystemSettingsSection(state),
      withCompanyPill(
        section(L("B01_Dashboard_Projects"), projectTable(state.allProjects, state.user), true, [
          createButton({ label: "+", onClick: () => navigateTo(ROUTES.B02_PROJ_REGISTER) }),
        ]),
        state,
      ),
      buildTempUploadSection(),
      withCompanyPill(
        section(L("B01_Dashboard_Users"), userTable(state.allUsers, state.user), true, [
          createButton({
            label: "+",
            onClick: () => openAddMemberModal(undefined, state.adminCompanyId),
          }),
        ]),
        state,
      ),
      withCompanyPill(
        section(
          L("B01_Dashboard_JoinRequests"),
          joinRequestTable(state.allJoinRequests, true),
          true,
        ),
        state,
      ),
      withCompanyPill(
        section(L("B01_Dashboard_Companies"), companyTable(picked, state.user), true, [
          createButton({ label: "+", onClick: () => openCreateCompanyModal() }),
        ]),
        state,
      ),
    );
  } else if (state.user.role === "ADMIN") {
    // 시스템 설정은 맨 위 한 줄(27-3a)
    grid.append(
      buildSystemSettingsSection(state),
      section(L("B01_Dashboard_Projects"), projectTable(state.companyProjects, state.user), true, [
        createButton({ label: "+", onClick: () => navigateTo(ROUTES.B02_PROJ_REGISTER) }),
      ]),
      buildTempUploadSection(),
      section(L("B01_Dashboard_Members"), memberTable(state.members, state.user), true, [
        createButton({ label: "+", onClick: () => openAddMemberModal() }),
      ]),
      section(L("B01_Dashboard_JoinRequests"), joinRequestTable(state.joinRequests, false), true),
      section(L("B01_Dashboard_Company"), buildCompanyPanel(state), true),
    );
  } else {
    grid.append(
      buildSystemSettingsSection(state),
      section(L("B01_Dashboard_Projects"), projectTable(state.userProjects, state.user), true, [
        createButton({ label: "+", onClick: () => navigateTo(ROUTES.B02_PROJ_REGISTER) }),
      ]),
      // 임시 보관함 — 프로젝트를 만들기 전에 자료를 올려 두는 곳이라 프로젝트 목록
      // 바로 아래에 둔다(2026-08-08 사용자 지시).
      buildTempUploadSection(),
      section(L("B01_Dashboard_Company"), buildCompanyPanel(state), true),
    );
  }

  grid.append(
    section(L("B01_Dashboard_Profile"), buildProfileForm(state.user)),
    section(L("B01_Account_Section_Security"), buildSecurityForm()),
  );
  // 시스템 로그는 맨 아래 (2026-09-06 사용자 지시).
  if (state.user.role === "SYSTEM_ADMIN") {
    grid.append(section(L("B01_Dashboard_AuditLogs"), auditLogTable(state.auditLogs), true));
  }
  page.append(grid);
  const layout = createGeneralLayout({
    pageClass: "b01-dashboard",
    title: L("B01_Dashboard_Title"),
    subtitle: L("B01_Dashboard_Subtitle"),
    content: page,
  });
  // 역할 배지는 제목 줄 오른쪽에 둔다(자리는 CSS 격자가 잡는다).
  const tag = createTag(
    roleLabel(state.user.role),
    state.user.role === "SYSTEM_ADMIN" ? "accent" : "neutral",
  );
  tag.classList.add("b01-dashboard__role");
  layout.root.querySelector(".ui-general-layout__header")?.append(tag);
  return layout.root;
}