/**
 * @ai-summary Main dashboard screen component showing fleet overview
 */

import React from 'react';
import { Box } from '@mui/material';
import WarningAmberRoundedIcon from '@mui/icons-material/WarningAmberRounded';
import DirectionsCarRoundedIcon from '@mui/icons-material/DirectionsCarRounded';
import { SummaryCards, SummaryCardsSkeleton } from './SummaryCards';
import { VehicleAttention, VehicleAttentionSkeleton } from './VehicleAttention';
import { QuickActions, QuickActionsSkeleton } from './QuickActions';
import { useDashboardSummary, useVehiclesNeedingAttention } from '../hooks/useDashboardData';
import { GlassCard } from '../../../shared-minimal/components/mobile/GlassCard';
import { Button } from '../../../shared-minimal/components/Button';

import { MobileScreen } from '../../../core/store';
import { Vehicle } from '../../vehicles/types/vehicles.types';

interface DashboardScreenProps {
  onNavigate?: (screen: MobileScreen, metadata?: Record<string, any>) => void;
  onVehicleClick?: (vehicle: Vehicle) => void;
  onViewMaintenance?: () => void;
}

export const DashboardScreen: React.FC<DashboardScreenProps> = ({
  onNavigate,
  onVehicleClick,
  onViewMaintenance
}) => {
  const { data: summary, isLoading: summaryLoading, error: summaryError } = useDashboardSummary();
  const { data: vehiclesNeedingAttention, isLoading: attentionLoading, error: attentionError } = useVehiclesNeedingAttention();

  // Error state
  if (summaryError || attentionError) {
    return (
      <div className="space-y-4">
        <GlassCard>
          <div className="text-center py-12">
            <Box sx={{ color: 'warning.main', mb: 1.5 }}>
              <WarningAmberRoundedIcon sx={{ fontSize: 48 }} />
            </Box>
            <h2 className="text-lg font-semibold text-slate-800 dark:text-avus mb-2">
              Unable to Load Dashboard
            </h2>
            <p className="text-slate-500 dark:text-titanio mb-4">
              There was an error loading your dashboard data
            </p>
            <Button
              variant="primary"
              size="md"
              onClick={() => window.location.reload()}
            >
              Retry
            </Button>
          </div>
        </GlassCard>
      </div>
    );
  }

  // Loading state
  if (summaryLoading || attentionLoading || !summary || !vehiclesNeedingAttention) {
    return (
      <div className="space-y-6">
        <SummaryCardsSkeleton />
        <VehicleAttentionSkeleton />
        <QuickActionsSkeleton />
      </div>
    );
  }

  // Empty state - no vehicles
  if (summary.totalVehicles === 0) {
    return (
      <div className="space-y-6">
        <GlassCard>
          <div className="text-center py-12">
            <Box sx={{ color: 'primary.main', mb: 2 }}>
              <DirectionsCarRoundedIcon sx={{ fontSize: 64 }} />
            </Box>
            <h2 className="text-xl font-semibold text-slate-800 dark:text-avus mb-3">
              Welcome to MotoVaultPro
            </h2>
            <p className="text-slate-500 dark:text-titanio mb-6 max-w-md mx-auto">
              Get started by adding your first vehicle to track fuel logs, maintenance, and more
            </p>
            <Button
              variant="primary"
              size="lg"
              onClick={() => onNavigate?.('Vehicles')}
            >
              Add Your First Vehicle
            </Button>
          </div>
        </GlassCard>
      </div>
    );
  }

  // Main dashboard view
  return (
    <div className="space-y-6">
      {/* Summary Cards */}
      <SummaryCards summary={summary} />

      {/* Vehicles Needing Attention */}
      {vehiclesNeedingAttention && vehiclesNeedingAttention.length > 0 && (
        <VehicleAttention
          vehicles={vehiclesNeedingAttention}
          onVehicleClick={(vehicleId) => {
            const vehicle = vehiclesNeedingAttention.find(v => v.id === vehicleId);
            if (vehicle && onVehicleClick) {
              onVehicleClick(vehicle);
            }
          }}
        />
      )}

      {/* Quick Actions */}
      <QuickActions
        onAddVehicle={() => onNavigate?.('Vehicles')}
        onLogFuel={() => onNavigate?.('Log Fuel')}
        onViewMaintenance={onViewMaintenance ?? (() => onNavigate?.('Vehicles'))}
        onViewVehicles={() => onNavigate?.('Vehicles')}
      />

      {/* Footer Hint */}
      <div className="text-center py-4">
        <p className="text-xs text-slate-400 dark:text-canna">
          Dashboard updates every 2 minutes
        </p>
      </div>
    </div>
  );
};