import { ROUTES } from "@config/config_frontend";
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,
  fetchAllJoinRequests,
  fetchAllProjects,
  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 { 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;
}

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,
    };
    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") {
    const results = await Promise.allSettled([
      fetchAllCompanies(),
      fetchAllUsers(),
      fetchAllJoinRequests(),
      fetchAuditLogs(),
      fetchSystemResources(7),
      fetchAllProjects(),
    ]);
    state.allCompanies = results[0].status === "fulfilled" ? results[0].value : [];
    state.allUsers = results[1].status === "fulfilled" ? results[1].value : [];
    state.allJoinRequests = results[2].status === "fulfilled" ? results[2].value : [];
    state.auditLogs = results[3].status === "fulfilled" ? results[3].value : [];
    state.resources = results[4].status === "fulfilled" ? results[4].value : null;
    state.allProjects = results[5].status === "fulfilled" ? results[5].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;
  }
}

function buildSystemSettingsPanel(): HTMLElement {
  const wrap = document.createElement("div");
  wrap.className = "b01-dashboard__actions";
  wrap.append(
    createButton({
      label: L("B01_Dashboard_MasterData"),
      variant: "ghost",
      onClick: () => navigateTo(ROUTES.Z01_MASTER_DATA),
    }),
  );
  return wrap;
}

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") {
    // 리소스 현황 오른쪽에 시스템 설정 — 앞으로 다른 설정 단추도 이 칸에 듦 (2026-09-15 브레인 Z01).
    const topRow = document.createElement("div");
    topRow.className = "b01-dashboard__top-row";
    topRow.append(
      section(L("B01_Dashboard_Resources"), buildResourcePanel(state.resources)),
      section(L("B01_Dashboard_SystemSettings"), buildSystemSettingsPanel()),
    );
    grid.append(
      topRow,
      section(L("B01_Dashboard_Projects"), projectTable(state.allProjects, state.user), true, [
        createButton({ label: "+", onClick: () => navigateTo(ROUTES.B02_PROJ_REGISTER) }),
      ]),
      buildTempUploadSection(),
      section(L("B01_Dashboard_Users"), userTable(state.allUsers, state.user), true, [
        createButton({ label: "+", onClick: () => openAddMemberModal() }),
      ]),
      section(L("B01_Dashboard_JoinRequests"), joinRequestTable(state.allJoinRequests, true), true),
      section(L("B01_Dashboard_Companies"), companyTable(state.allCompanies, state.user), true, [
        createButton({ label: "+", onClick: () => openCreateCompanyModal() }),
      ]),
    );
  } else if (state.user.role === "ADMIN") {
    grid.append(
      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(
      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;
}