/**
 * Unraid Dashboard Page
 * Main overview page for Unraid server management
 */

import { useState } from 'react';
import {
  Alert,
  Container,
  Grid,
  Group,
  Loader,
  Stack,
  Text,
  ThemeIcon,
  Title,
  useMantineTheme,
} from '@mantine/core';
import { notifications } from '@mantine/notifications';
import { IconServer, IconAlertCircle, IconCheck } from '@tabler/icons-react';
import { GetServerSidePropsContext } from 'next';

import { SystemInfoCard, ArrayCard, DockerCard, VmsCard } from '~/components/Unraid/Dashboard';
import { UnraidLayout } from '~/components/Unraid/Layout';
import { getServerAuthSession } from '~/server/auth';
import { getServerSideTranslations } from '~/tools/server/getServerSideTranslations';
import { checkForSessionOrAskForLogin } from '~/tools/server/loginBuilder';
import { api } from '~/utils/api';

export default function UnraidDashboardPage() {
  const theme = useMantineTheme();
  const [loadingContainers, setLoadingContainers] = useState<string[]>([]);
  const [loadingVms, setLoadingVms] = useState<string[]>([]);
  const [arrayLoading, setArrayLoading] = useState(false);

  // Fetch dashboard data
  const {
    data: dashboard,
    isLoading,
    error,
    refetch,
  } = api.unraid.dashboard.useQuery(undefined, {
    refetchInterval: 10000, // Refresh every 10 seconds
  });

  // Mutations
  const startContainer = api.unraid.startContainer.useMutation({
    onMutate: ({ id }) => setLoadingContainers((prev) => [...prev, id]),
    onSettled: (_, __, { id }) =>
      setLoadingContainers((prev) => prev.filter((cid) => cid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'Container Started',
        message: 'Container started successfully',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
    onError: (error) => {
      notifications.show({
        title: 'Error',
        message: error.message,
        color: 'red',
        icon: <IconAlertCircle size={16} />,
      });
    },
  });

  const stopContainer = api.unraid.stopContainer.useMutation({
    onMutate: ({ id }) => setLoadingContainers((prev) => [...prev, id]),
    onSettled: (_, __, { id }) =>
      setLoadingContainers((prev) => prev.filter((cid) => cid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'Container Stopped',
        message: 'Container stopped successfully',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
    onError: (error) => {
      notifications.show({
        title: 'Error',
        message: error.message,
        color: 'red',
        icon: <IconAlertCircle size={16} />,
      });
    },
  });

  const startVm = api.unraid.startVm.useMutation({
    onMutate: ({ id }) => setLoadingVms((prev) => [...prev, id]),
    onSettled: (_, __, { id }) => setLoadingVms((prev) => prev.filter((vid) => vid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'VM Started',
        message: 'Virtual machine started successfully',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
    onError: (error) => {
      notifications.show({
        title: 'Error',
        message: error.message,
        color: 'red',
        icon: <IconAlertCircle size={16} />,
      });
    },
  });

  const stopVm = api.unraid.stopVm.useMutation({
    onMutate: ({ id }) => setLoadingVms((prev) => [...prev, id]),
    onSettled: (_, __, { id }) => setLoadingVms((prev) => prev.filter((vid) => vid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'VM Stopped',
        message: 'Virtual machine stopped successfully',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
    onError: (error) => {
      notifications.show({
        title: 'Error',
        message: error.message,
        color: 'red',
        icon: <IconAlertCircle size={16} />,
      });
    },
  });

  const pauseVm = api.unraid.pauseVm.useMutation({
    onMutate: ({ id }) => setLoadingVms((prev) => [...prev, id]),
    onSettled: (_, __, { id }) => setLoadingVms((prev) => prev.filter((vid) => vid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'VM Paused',
        message: 'Virtual machine paused successfully',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
  });

  const resumeVm = api.unraid.resumeVm.useMutation({
    onMutate: ({ id }) => setLoadingVms((prev) => [...prev, id]),
    onSettled: (_, __, { id }) => setLoadingVms((prev) => prev.filter((vid) => vid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'VM Resumed',
        message: 'Virtual machine resumed successfully',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
  });

  const rebootVm = api.unraid.rebootVm.useMutation({
    onMutate: ({ id }) => setLoadingVms((prev) => [...prev, id]),
    onSettled: (_, __, { id }) => setLoadingVms((prev) => prev.filter((vid) => vid !== id)),
    onSuccess: () => {
      notifications.show({
        title: 'VM Rebooting',
        message: 'Virtual machine is rebooting',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
  });

  const startArray = api.unraid.startArray.useMutation({
    onMutate: () => setArrayLoading(true),
    onSettled: () => setArrayLoading(false),
    onSuccess: () => {
      notifications.show({
        title: 'Array Starting',
        message: 'Array is starting...',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
    onError: (error) => {
      notifications.show({
        title: 'Error',
        message: error.message,
        color: 'red',
        icon: <IconAlertCircle size={16} />,
      });
    },
  });

  const stopArray = api.unraid.stopArray.useMutation({
    onMutate: () => setArrayLoading(true),
    onSettled: () => setArrayLoading(false),
    onSuccess: () => {
      notifications.show({
        title: 'Array Stopping',
        message: 'Array is stopping...',
        color: 'green',
        icon: <IconCheck size={16} />,
      });
      refetch();
    },
    onError: (error) => {
      notifications.show({
        title: 'Error',
        message: error.message,
        color: 'red',
        icon: <IconAlertCircle size={16} />,
      });
    },
  });

  const unreadNotifications = dashboard?.notifications?.filter((n) => !n.read).length || 0;

  // Loading state
  if (isLoading) {
    return (
      <UnraidLayout>
        <Container size="xl" py="xl">
          <Stack align="center" spacing="md">
            <Loader size="xl" />
            <Text color="dimmed">Connecting to Unraid server...</Text>
          </Stack>
        </Container>
      </UnraidLayout>
    );
  }

  // Error state
  if (error) {
    return (
      <UnraidLayout>
        <Container size="xl" py="xl">
          <Alert
            icon={<IconAlertCircle size={16} />}
            title="Connection Error"
            color="red"
            variant="filled"
          >
            {error.message}
          </Alert>
        </Container>
      </UnraidLayout>
    );
  }

  // No data
  if (!dashboard) {
    return (
      <UnraidLayout>
        <Container size="xl" py="xl">
          <Alert
            icon={<IconAlertCircle size={16} />}
            title="No Data"
            color="yellow"
          >
            No data received from Unraid server. Please check your configuration.
          </Alert>
        </Container>
      </UnraidLayout>
    );
  }

  return (
    <UnraidLayout notifications={unreadNotifications}>
      <Container size="xl" py="xl">
        <Stack spacing="xl">
          {/* Header */}
          <Group position="apart">
            <Group>
              <ThemeIcon size={48} radius="md" variant="gradient" gradient={{ from: 'blue', to: 'cyan' }}>
                <IconServer size={28} />
              </ThemeIcon>
              <div>
                <Title order={1}>Unraid Dashboard</Title>
                <Text color="dimmed" size="sm">
                  {dashboard.vars.name} - Unraid {dashboard.info.versions.unraid}
                </Text>
              </div>
            </Group>
          </Group>

        {/* Dashboard Grid */}
        <Grid>
          {/* System Info */}
          <Grid.Col md={6} lg={4}>
            <SystemInfoCard
              info={dashboard.info}
              vars={dashboard.vars}
              registration={dashboard.registration}
            />
          </Grid.Col>

          {/* Array */}
          <Grid.Col md={6} lg={8}>
            <ArrayCard
              array={dashboard.array}
              onStartArray={() => startArray.mutate()}
              onStopArray={() => stopArray.mutate()}
              isLoading={arrayLoading}
            />
          </Grid.Col>

          {/* Docker */}
          <Grid.Col md={6}>
            <DockerCard
              docker={dashboard.docker}
              onStartContainer={(id) => startContainer.mutate({ id })}
              onStopContainer={(id) => stopContainer.mutate({ id })}
              loadingContainers={loadingContainers}
            />
          </Grid.Col>

          {/* VMs */}
          <Grid.Col md={6}>
            <VmsCard
              vms={dashboard.vms}
              onStartVm={(id) => startVm.mutate({ id })}
              onStopVm={(id) => stopVm.mutate({ id })}
              onPauseVm={(id) => pauseVm.mutate({ id })}
              onResumeVm={(id) => resumeVm.mutate({ id })}
              onRebootVm={(id) => rebootVm.mutate({ id })}
              loadingVms={loadingVms}
            />
          </Grid.Col>
        </Grid>
      </Stack>
    </Container>
    </UnraidLayout>
  );
}

export const getServerSideProps = async (context: GetServerSidePropsContext) => {
  const session = await getServerAuthSession(context);
  const translations = await getServerSideTranslations(['common'], context.locale, context.req, context.res);

  const result = checkForSessionOrAskForLogin(context, session, () => session?.user != undefined);
  if (result) {
    return result;
  }

  return {
    props: {
      ...translations,
    },
  };
};