import { useMemo } from "react";
import { Popover, Skeleton } from "@mui/material";
import { ChevronDown, Users } from "lucide-react";
import type { WorkOrderUser } from "@/domain/work-orders/types/work-order";
import { CheckboxMenuItem } from "@/components/ui/checkbox-menu-item";
import { MenuAnchorButton } from "@/components/ui/menu-anchor-button";
import { useMenuAnchor } from "@/hooks/use-menu-anchor";
import type { DashboardScope } from "./dashboard-scope";

type DashboardScopePickerProps = {
  scope: DashboardScope;
  onChange: (scope: DashboardScope) => void;
  users: WorkOrderUser[];
  usersLoading?: boolean;
  currentUserId?: string | number;
};

export function DashboardScopePicker({
  scope,
  onChange,
  users,
  usersLoading = false,
  currentUserId,
}: DashboardScopePickerProps) {
  const { anchorEl, open, setAnchor, close } = useMenuAnchor();
  const meId = currentUserId != null && currentUserId !== "" ? String(currentUserId) : null;

  const dispatchers = useMemo(
    () => [...users].sort((a, b) => a.name.localeCompare(b.name)),
    [users],
  );

  const label = useMemo(() => {
    if (scope.mode === "all") return "All dispatchers";
    if (scope.mode === "mine") return "My WOs";
    return dispatchers.find((user) => String(user.id) === scope.id)?.name ?? "Dispatcher";
  }, [scope, dispatchers]);

  const select = (next: DashboardScope) => {
    onChange(next);
    close();
  };

  if (usersLoading && users.length === 0) {
    return (
      <Skeleton
        variant="rounded"
        width={140}
        height={18}
        animation="wave"
        aria-label="Loading dispatchers"
      />
    );
  }

  return (
    <>
      <MenuAnchorButton
        onAnchor={setAnchor}
        open={open}
        className="flex w-auto shrink-0 items-center gap-1.5 whitespace-nowrap transition-colors"
        style={{ fontSize: 13, fontWeight: 500, color: "var(--muted-foreground)" }}
        aria-haspopup="listbox"
      >
        <Users size={13} aria-hidden style={{ color: "var(--muted-foreground)" }} />
        {label}
        <ChevronDown size={13} aria-hidden style={{ color: "var(--muted-foreground)" }} />
      </MenuAnchorButton>

      <Popover
        open={open}
        anchorEl={anchorEl}
        onClose={close}
        anchorOrigin={{ vertical: "bottom", horizontal: "left" }}
        transformOrigin={{ vertical: "top", horizontal: "left" }}
        slotProps={{
          paper: {
            className: "mt-1 w-[220px] rounded-lg border border-border p-1.5 shadow-md",
          },
        }}
      >
        <CheckboxMenuItem
          checked={scope.mode === "all"}
          label="All dispatchers"
          onClick={() => select({ mode: "all" })}
        />

        {meId != null && (
          <CheckboxMenuItem
            checked={scope.mode === "mine"}
            label="My WOs only"
            labelClassName="font-medium text-primary"
            className="mb-1 pb-2"
            style={{ borderBottom: "1px solid var(--color-border)" }}
            onClick={() => select({ mode: "mine" })}
          />
        )}

        {dispatchers.map((user) => {
          const id = String(user.id);
          return (
            <CheckboxMenuItem
              key={id}
              checked={scope.mode === "individual" && scope.id === id}
              label={user.name}
              right={
                meId === id ? (
                  <span className="text-[10px] text-muted-foreground">me</span>
                ) : undefined
              }
              onClick={() => select({ mode: "individual", id })}
            />
          );
        })}
      </Popover>
    </>
  );
}