import { Button } from "@repo/shadcn-ui/components/button";
import { SelectWithAction } from "@repo/shadcn-ui/components/select-with-action";
import { StatisticCard } from "@repo/shadcn-ui/components/statistic-card";
import {
  BoxIcon,
  Building2Icon,
  ChevronRightIcon,
  ClockIcon,
  DatabaseIcon,
  FileKeyIcon,
  LaptopIcon,
  TicketIcon,
  TriangleAlertIcon,
  UserRoundXIcon,
  UsersIcon,
  WrenchIcon,
} from "@repo/shadcn-ui/lib/icons";
import { useQuery } from "@tanstack/react-query";
import type { ReactNode } from "react";
import { useState } from "react";
import { useTranslation } from "react-i18next";

import type { DashboardIssue } from "../../common/dashboard";
import { companyApi, companyKeys } from "../api/company-api";

import {
  type DashboardNavigation,
  dashboardApi,
  dashboardKeys,
  entryDestination,
} from "./dashboard-api";
import { BlockState } from "./dashboard-block";
import { DashboardDetailsDialog } from "./dashboard-details-dialog";
import { DashboardQuickCreate } from "./dashboard-quick-create";

const ISSUE_ICONS = {
  certificate: FileKeyIcon,
  license: FileKeyIcon,
  profile: UsersIcon,
  missing_site: BoxIcon,
  inactive_person: UserRoundXIcon,
};
const KIND_ICONS = {
  ticket: TicketIcon,
  intervention: WrenchIcon,
  asset: LaptopIcon,
  resource: DatabaseIcon,
  person: UsersIcon,
  profile: UsersIcon,
};

export function DashboardPage({
  onNavigate,
  csrfToken,
}: {
  onNavigate: (destination: DashboardNavigation) => void;
  csrfToken: string;
}) {
  const { t, i18n } = useTranslation("companies");
  const [companyId, setCompanyId] = useState("");
  const scope = companyId || undefined;
  const [details, setDetails] = useState<{
    kind?: "asset" | "resource";
    issue?: DashboardIssue;
    work?: boolean;
    activity?: boolean;
    companies?: boolean;
  }>();
  const [quick, setQuick] = useState<
    "company" | "ticket" | "intervention" | "asset" | "resource"
  >();
  const companies = useQuery({ queryKey: companyKeys.list, queryFn: companyApi.list });
  const summary = useQuery({
    queryKey: dashboardKeys.block("summary", scope),
    queryFn: ({ signal }) => dashboardApi.summary(signal, scope),
    staleTime: 0,
  });
  const work = useQuery({
    queryKey: dashboardKeys.block("work", scope),
    queryFn: ({ signal }) => dashboardApi.work(signal, scope),
    staleTime: 0,
  });
  const attention = useQuery({
    queryKey: dashboardKeys.block("attention", scope),
    queryFn: ({ signal }) => dashboardApi.attention(signal, scope),
    staleTime: 0,
  });
  const activity = useQuery({
    queryKey: dashboardKeys.block("activity", scope),
    queryFn: ({ signal }) => dashboardApi.activity(signal, scope),
    staleTime: 0,
  });
  const totals = useQuery({
    queryKey: dashboardKeys.block("companies", scope),
    queryFn: ({ signal }) => dashboardApi.companies(signal, scope),
    staleTime: 0,
  });
  const date = (value: string | null) =>
    value
      ? new Intl.DateTimeFormat(i18n.language, { dateStyle: "medium", timeStyle: "short" }).format(
          new Date(value)
        )
      : "—";
  const statStatus = summary.isPending
    ? t("loading")
    : summary.isError
      ? t("dashboard.blockError")
      : undefined;
  const kpis = [
    {
      key: "companies",
      label: "activeCompanies",
      Icon: Building2Icon,
      tone: "teal",
      action: () => onNavigate({ area: "directory", companyId: scope, activeOnly: true }),
    },
    {
      key: "tickets",
      label: "openTickets",
      Icon: TicketIcon,
      tone: "rose",
      action: () => onNavigate({ area: "tickets", companyId: scope, pendingOnly: true }),
    },
    {
      key: "interventions",
      label: "pendingInterventions",
      Icon: WrenchIcon,
      tone: "amber",
      action: () => onNavigate({ area: "interventions", companyId: scope, pendingOnly: true }),
    },
    {
      key: "assets",
      label: "registeredAssets",
      Icon: LaptopIcon,
      tone: "green",
      action: () => setDetails({ kind: "asset" }),
    },
    {
      key: "resources",
      label: "registeredResources",
      Icon: DatabaseIcon,
      tone: "violet",
      action: () => setDetails({ kind: "resource" }),
    },
  ] as const;
  return (
    <div className="dashboard-page space-y-6">
      <header className="flex flex-wrap items-start justify-between gap-4">
        <div>
          <h1 className="text-3xl font-semibold tracking-tight">{t("dashboard.title")}</h1>
          <p className="mt-1 text-sm text-muted-foreground">{t("dashboard.description")}</p>
        </div>
        <div className="w-full sm:w-64 space-y-2">
          <SelectWithAction
            id="dashboard-company"
            label={t("tickets.company")}
            onValueChange={setCompanyId}
            options={[
              ...(companies.data?.companies.map((item) => ({ value: item.id, label: item.name })) ??
                []),
            ]}
            placeholder={t("interventions.allCompanies")}
            value={companyId}
          />
          {summary.isSuccess && (
            <p className="text-xs text-muted-foreground flex items-center gap-2">
              <span aria-hidden="true" className="size-2 rounded-full bg-primary" />
              {t("dashboard.connected")}
            </p>
          )}
        </div>
      </header>
      <section aria-label={t("dashboard.indicators")} className="dashboard-kpis">
        {kpis.map(({ key, label, Icon, tone, action }) => (
          <StatisticCard
            icon={<Icon />}
            key={key}
            label={t(`dashboard.${label}`)}
            onClick={action}
            status={statStatus}
            tone={tone}
            value={summary.isError ? undefined : summary.data?.[key]}
          />
        ))}
      </section>
      <div className="grid gap-6 xl:grid-cols-[minmax(0,1.5fr)_minmax(0,1fr)]">
        <DashboardPanel
          action={() => setDetails({ work: true })}
          icon={<TicketIcon />}
          title={t("dashboard.pendingWork")}
        >
          <BlockState
            empty={!work.data?.items.length}
            emptyText={t("dashboard.noPendingWork")}
            query={work}
          >
            <div className="overflow-x-auto">
              <table>
                <caption className="sr-only">{t("dashboard.pendingWork")}</caption>
                <thead>
                  <tr>
                    {[
                      t("dashboard.type"),
                      t("tickets.reference"),
                      t("tickets.subject"),
                      t("tickets.company"),
                      t("tickets.priority"),
                      t("tickets.state"),
                    ].map((label) => (
                      <th key={label} scope="col">
                        {label}
                      </th>
                    ))}
                  </tr>
                </thead>
                <tbody>
                  {work.data?.items.slice(0, 6).map((item) => {
                    const Icon = KIND_ICONS[item.kind];
                    return (
                      <tr key={item.id}>
                        <td>
                          <Icon aria-hidden="true" className="size-5 text-primary" />
                          <span className="sr-only">{t(`dashboard.types.${item.kind}`)}</span>
                        </td>
                        <td>
                          <button
                            className="dashboard-link"
                            onClick={() => onNavigate(entryDestination(item))}
                            type="button"
                          >
                            {item.reference}
                          </button>
                        </td>
                        <td>{item.name}</td>
                        <td>{item.companyName}</td>
                        <td>
                          {item.priority ? (
                            <span className="dashboard-badge" data-state={item.priority}>
                              {t(`tickets.priorities.${item.priority}`)}
                            </span>
                          ) : (
                            "—"
                          )}
                        </td>
                        <td>
                          <span className="dashboard-badge" data-state={item.state}>
                            {t(
                              (item.kind === "ticket"
                                ? "tickets.states."
                                : "interventions.states.") + item.state
                            )}
                          </span>
                        </td>
                      </tr>
                    );
                  })}
                </tbody>
              </table>
            </div>
          </BlockState>
        </DashboardPanel>
        <DashboardPanel
          icon={<TriangleAlertIcon className="text-destructive" />}
          title={t("dashboard.attention")}
        >
          <BlockState
            empty={!attention.data?.items.length}
            emptyText={t("dashboard.noAttention")}
            query={attention}
          >
            <ul className="divide-y">
              {attention.data?.items.map((item) => {
                const Icon = ISSUE_ICONS[item.kind];
                return (
                  <li key={item.kind}>
                    <button
                      className="dashboard-alert"
                      onClick={() => setDetails({ issue: item.kind })}
                      type="button"
                    >
                      <Icon aria-hidden="true" className="size-5" />
                      <strong
                        className={
                          item.count
                            ? "text-amber-600 dark:text-amber-400"
                            : "text-muted-foreground"
                        }
                      >
                        {item.count}
                      </strong>
                      <span>{t(`dashboard.issues.${item.kind}`)}</span>
                      <ChevronRightIcon aria-hidden="true" className="size-4 shrink-0" />
                    </button>
                  </li>
                );
              })}
            </ul>
          </BlockState>
        </DashboardPanel>
      </div>
      <div className="grid gap-6 xl:grid-cols-2">
        <DashboardPanel
          action={() => setDetails({ activity: true })}
          icon={<ClockIcon />}
          title={t("dashboard.recentActivity")}
        >
          <BlockState
            empty={!activity.data?.items.length}
            emptyText={t("dashboard.noRecentActivity")}
            query={activity}
          >
            <ol className="dashboard-timeline">
              {activity.data?.items.slice(0, 4).map((item) => {
                const Icon = KIND_ICONS[item.kind];
                return (
                  <li key={item.eventId ?? item.id}>
                    <time
                      className="text-xs text-muted-foreground"
                      dateTime={item.recordedAt ?? undefined}
                    >
                      {date(item.recordedAt)}
                    </time>
                    <Icon aria-hidden="true" className="size-5 text-primary shrink-0" />
                    <div>
                      <button
                        className="dashboard-link"
                        onClick={() => onNavigate(entryDestination(item))}
                        type="button"
                      >
                        {t("dashboard.recordUpdated", { name: item.reference ?? item.name })}
                      </button>
                      <p className="text-xs text-muted-foreground">
                        {item.companyName}
                        {item.actorName ? ` · ${item.actorName}` : ""}
                      </p>
                    </div>
                  </li>
                );
              })}
            </ol>
          </BlockState>
        </DashboardPanel>
        <DashboardPanel
          action={() => setDetails({ companies: true })}
          icon={<Building2Icon />}
          title={t("dashboard.companySummary")}
        >
          <BlockState
            empty={!totals.data?.items.length}
            emptyText={t("noCompanies")}
            query={totals}
          >
            <div className="overflow-x-auto">
              <table>
                <caption className="sr-only">{t("dashboard.companySummary")}</caption>
                <thead>
                  <tr>
                    {[
                      t("tickets.company"),
                      t("dashboard.openTickets"),
                      t("dashboard.pendingInterventions"),
                      t("dashboard.registeredAssets"),
                      t("people"),
                    ].map((label) => (
                      <th key={label} scope="col">
                        {label}
                      </th>
                    ))}
                  </tr>
                </thead>
                <tbody>
                  {totals.data?.items.slice(0, 5).map((item) => (
                    <tr key={item.id}>
                      <td>
                        <button
                          className="dashboard-link"
                          onClick={() =>
                            onNavigate({ area: "company", id: item.id, section: "inventory" })
                          }
                          type="button"
                        >
                          {item.name}
                        </button>
                      </td>
                      <td>
                        <button
                          aria-label={`${t("dashboard.openTickets")} · ${item.name}: ${item.tickets}`}
                          className="dashboard-link text-destructive"
                          onClick={() =>
                            onNavigate({ area: "tickets", companyId: item.id, pendingOnly: true })
                          }
                          type="button"
                        >
                          {item.tickets}
                        </button>
                      </td>
                      <td>
                        <button
                          aria-label={`${t("dashboard.pendingInterventions")} · ${item.name}: ${item.interventions}`}
                          className="dashboard-link text-amber-600 dark:text-amber-400"
                          onClick={() =>
                            onNavigate({
                              area: "interventions",
                              companyId: item.id,
                              pendingOnly: true,
                            })
                          }
                          type="button"
                        >
                          {item.interventions}
                        </button>
                      </td>
                      <td>
                        <button
                          className="dashboard-link"
                          onClick={() =>
                            onNavigate({ area: "company", id: item.id, section: "inventory" })
                          }
                          type="button"
                        >
                          <span className="sr-only">
                            {t("dashboard.registeredAssets")} · {item.name}:{" "}
                          </span>
                          {item.assets}
                        </button>
                      </td>
                      <td>
                        <button
                          className="dashboard-link"
                          onClick={() =>
                            onNavigate({ area: "company", id: item.id, section: "people" })
                          }
                          type="button"
                        >
                          <span className="sr-only">
                            {t("people")} · {item.name}:{" "}
                          </span>
                          {item.people}
                        </button>
                      </td>
                    </tr>
                  ))}
                </tbody>
              </table>
            </div>
          </BlockState>
        </DashboardPanel>
      </div>
      <DashboardPanel title={t("dashboard.quickActions")}>
        <div className="flex flex-wrap gap-3">
          {(["ticket", "intervention", "company", "asset", "resource"] as const).map((kind) => {
            const Icon = kind === "company" ? Building2Icon : KIND_ICONS[kind];
            return (
              <Button key={kind} onClick={() => setQuick(kind)} variant="outline">
                <Icon aria-hidden="true" className="size-4" />
                {t(`dashboard.create.${kind}`)}
              </Button>
            );
          })}
        </div>
      </DashboardPanel>
      {details && (
        <DashboardDetailsDialog
          companyId={scope}
          details={details}
          onClose={() => setDetails(undefined)}
          onNavigate={onNavigate}
        />
      )}
      {quick && (
        <DashboardQuickCreate
          companyId={scope}
          csrfToken={csrfToken}
          kind={quick}
          onClose={() => setQuick(undefined)}
          onNavigate={onNavigate}
        />
      )}
    </div>
  );
}

function DashboardPanel({
  title,
  icon,
  action,
  children,
}: {
  title: string;
  icon?: ReactNode;
  action?: () => void;
  children: ReactNode;
}) {
  const { t } = useTranslation("companies");
  return (
    <section aria-label={title} className="dashboard-panel min-w-0">
      <div className="mb-4 flex items-center justify-between gap-3">
        <h2 className="flex items-center gap-3">
          {icon && (
            <span aria-hidden="true" className="[&_svg]:size-5">
              {icon}
            </span>
          )}
          {title}
        </h2>
        {action && (
          <Button className="text-primary shrink-0" onClick={action} size="sm" variant="ghost">
            {t("dashboard.viewAll")}
            <ChevronRightIcon aria-hidden="true" className="size-4" />
          </Button>
        )}
      </div>
      {children}
    </section>
  );
}