'use client';

import { useState, useEffect } from 'react';
import { Box, Typography, Button, Paper, Grid, CircularProgress } from '@mui/material';
import { AppShell } from '@/components/layouts/AppShell/AppShell';
import { ProtectedRoute } from '@/components/common/ProtectedRoute';
import { EmailVerificationBanner } from '@/components/common/EmailVerificationBanner';
import { ErrorBoundary } from '@/components/common/ErrorBoundary';
import { DataErrorFallback } from '@/components/common/ErrorFallbacks';
import { NetworkStatusIndicator } from '@/components/common/NetworkStatusIndicator';
import { StatGridSkeleton } from '@/components/common/LoadingSkeletons';
import {
  Restaurant,
  Hotel,
  BabyChangingStation,
  Insights,
  SmartToy,
  Analytics,
} from '@mui/icons-material';
import { motion } from 'framer-motion';
import { useAuth } from '@/lib/auth/AuthContext';
import { useRouter } from 'next/navigation';
import { trackingApi, DailySummary } from '@/lib/api/tracking';
import { childrenApi, Child } from '@/lib/api/children';
import { format } from 'date-fns';

export default function HomePage() {
  const { user } = useAuth();
  const router = useRouter();
  const [children, setChildren] = useState<Child[]>([]);
  const [selectedChild, setSelectedChild] = useState<Child | null>(null);
  const [dailySummary, setDailySummary] = useState<DailySummary | null>(null);
  const [loading, setLoading] = useState(true);

  const familyId = user?.families?.[0]?.familyId;
  // Load children and daily summary
  useEffect(() => {
    const loadData = async () => {
      if (!familyId) {
        setLoading(false);
        return;
      }

      try {
        // Load children
        const childrenData = await childrenApi.getChildren(familyId);
        setChildren(childrenData);

        if (childrenData.length > 0) {
          const firstChild = childrenData[0];
          setSelectedChild(firstChild);

          // Load today's summary for first child
          const today = format(new Date(), 'yyyy-MM-dd');
          const summary = await trackingApi.getDailySummary(firstChild.id, today);
          setDailySummary(summary);
        }
      } catch (error) {
        console.error('Failed to load data:', error);
      } finally {
        setLoading(false);
      }
    };

    loadData();
  }, [familyId]);

  const quickActions = [
    { icon: <Restaurant />, label: 'Feeding', color: '#FFB6C1', path: '/track/feeding' },
    { icon: <Hotel />, label: 'Sleep', color: '#B6D7FF', path: '/track/sleep' },
    { icon: <BabyChangingStation />, label: 'Diaper', color: '#FFE4B5', path: '/track/diaper' },
    { icon: <SmartToy />, label: 'AI Assistant', color: '#FFD3B6', path: '/ai-assistant' },
    { icon: <Analytics />, label: 'Analytics', color: '#D4B5FF', path: '/analytics' },
  ];

  const formatSleepHours = (minutes: number) => {
    const hours = Math.floor(minutes / 60);
    const mins = minutes % 60;
    if (hours > 0 && mins > 0) {
      return `${hours}h ${mins}m`;
    } else if (hours > 0) {
      return `${hours}h`;
    } else {
      return `${mins}m`;
    }
  };

  return (
    <ProtectedRoute>
      <AppShell>
        <NetworkStatusIndicator />
        <Box>
          <EmailVerificationBanner />

          <motion.div
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.5 }}
          >
            <Typography variant="h4" gutterBottom fontWeight="600" sx={{ mb: 1 }}>
              Welcome Back{user?.name ? `, ${user.name}` : ''}! 👋
            </Typography>
          <Typography variant="body1" color="text.secondary" sx={{ mb: 4 }}>
            Track your child's activities and get AI-powered insights
          </Typography>

          {/* Quick Actions */}
          <Typography variant="h6" gutterBottom fontWeight="600" sx={{ mb: 2 }}>
            Quick Actions
          </Typography>
          <Grid container spacing={2} sx={{ mb: 4 }}>
            {quickActions.map((action, index) => (
              <Grid item xs={6} sm={2.4} key={action.label}>
                <motion.div
                  initial={{ opacity: 0, scale: 0.9 }}
                  animate={{ opacity: 1, scale: 1 }}
                  transition={{ duration: 0.3, delay: index * 0.1 }}
                >
                  <Paper
                    onClick={() => router.push(action.path)}
                    sx={{
                      p: 3,
                      textAlign: 'center',
                      cursor: 'pointer',
                      bgcolor: action.color,
                      color: 'white',
                      transition: 'transform 0.2s',
                      '&:hover': {
                        transform: 'scale(1.05)',
                      },
                    }}
                  >
                    <Box sx={{ fontSize: 48, mb: 1 }}>{action.icon}</Box>
                    <Typography variant="body1" fontWeight="600">
                      {action.label}
                    </Typography>
                  </Paper>
                </motion.div>
              </Grid>
            ))}
          </Grid>

          {/* Today's Summary */}
          <Typography variant="h6" gutterBottom fontWeight="600" sx={{ mb: 2 }}>
            Today's Summary{selectedChild ? ` - ${selectedChild.name}` : ''}
          </Typography>
          <ErrorBoundary
            isolate
            fallback={<DataErrorFallback error={new Error('Failed to load summary')} />}
          >
            {loading ? (
              <StatGridSkeleton count={3} />
            ) : (
              <Paper sx={{ p: 3 }}>
                {!dailySummary ? (
                <Box sx={{ textAlign: 'center', py: 4 }}>
                  <Typography variant="body2" color="text.secondary">
                    {children.length === 0
                      ? 'Add a child to start tracking'
                      : 'No activities tracked today'}
                  </Typography>
                </Box>
              ) : (
                <Grid container spacing={3}>
                  <Grid item xs={4}>
                    <Box textAlign="center">
                      <Restaurant sx={{ fontSize: 32, color: 'primary.main', mb: 1 }} />
                      <Typography variant="h5" fontWeight="600">
                        {dailySummary.feedingCount || 0}
                      </Typography>
                      <Typography variant="body2" color="text.secondary">
                        Feedings
                      </Typography>
                    </Box>
                  </Grid>
                  <Grid item xs={4}>
                    <Box textAlign="center">
                      <Hotel sx={{ fontSize: 32, color: 'info.main', mb: 1 }} />
                      <Typography variant="h5" fontWeight="600">
                        {dailySummary.sleepTotalMinutes
                          ? formatSleepHours(dailySummary.sleepTotalMinutes)
                          : '0m'}
                      </Typography>
                      <Typography variant="body2" color="text.secondary">
                        Sleep
                      </Typography>
                    </Box>
                  </Grid>
                  <Grid item xs={4}>
                    <Box textAlign="center">
                      <BabyChangingStation sx={{ fontSize: 32, color: 'warning.main', mb: 1 }} />
                      <Typography variant="h5" fontWeight="600">
                        {dailySummary.diaperCount || 0}
                      </Typography>
                      <Typography variant="body2" color="text.secondary">
                        Diapers
                      </Typography>
                    </Box>
                  </Grid>
                </Grid>
                )}
              </Paper>
            )}
          </ErrorBoundary>

          {/* Next Predicted Activity */}
          <Box sx={{ mt: 4 }}>
            <Paper sx={{ p: 3, bgcolor: 'primary.light' }}>
              <Typography variant="body2" color="text.secondary" gutterBottom>
                Next Predicted Activity
              </Typography>
              <Typography variant="h6" fontWeight="600" gutterBottom>
                Nap time in 45 minutes
              </Typography>
              <Typography variant="body2" color="text.secondary">
                Based on your child's sleep patterns
              </Typography>
            </Paper>
          </Box>
          </motion.div>
        </Box>
      </AppShell>
    </ProtectedRoute>
  );
}