import { useState } from 'react';
import {
  Title, Text, Card, Stack, Group, SimpleGrid, Badge, ThemeIcon, Divider,
  Tabs, Button, Switch,
} from '@mantine/core';
import {
  IconBuilding, IconUser, IconSettings, IconShieldLock,
  IconFingerprint, IconLink, IconLogout,
} from '@tabler/icons-react';
import { notifications } from '@mantine/notifications';
import { useAuthStore } from '../../stores/authStore';
import { usePreferencesStore } from '../../stores/preferencesStore';
import { MfaSettings } from './MfaSettings';
import { PasskeySettings } from './PasskeySettings';
import { LinkedAccounts } from './LinkedAccounts';
import api from '../../services/api';

export function SettingsPage() {
  const { user, currentOrg } = useAuthStore();
  const { compactView, toggleCompactView } = usePreferencesStore();
  const [loggingOutAll, setLoggingOutAll] = useState(false);

  const handleLogoutEverywhere = async () => {
    setLoggingOutAll(true);
    try {
      await api.post('/auth/logout-everywhere');
      notifications.show({ message: 'All other sessions have been logged out', color: 'green' });
    } catch {
      notifications.show({ message: 'Failed to log out other sessions', color: 'red' });
    } finally {
      setLoggingOutAll(false);
    }
  };

  return (
    <Stack>
      <div>
        <Title order={2}>Settings</Title>
        <Text c="dimmed" size="sm">Organization and account settings</Text>
      </div>

      <SimpleGrid cols={{ base: 1, md: 2 }}>
        {/* Organization Info */}
        <Card withBorder padding="lg">
          <Group mb="md">
            <ThemeIcon color="blue" variant="light" size={40} radius="md">
              <IconBuilding size={24} />
            </ThemeIcon>
            <div>
              <Text fw={600} size="lg">Organization</Text>
              <Text c="dimmed" size="sm">Current organization details</Text>
            </div>
          </Group>
          <Stack gap="xs">
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Name</Text>
              <Text size="sm" fw={500}>{currentOrg?.name || 'N/A'}</Text>
            </Group>
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Your Role</Text>
              <Badge variant="light">{currentOrg?.role || 'N/A'}</Badge>
            </Group>
          </Stack>
        </Card>

        {/* User Profile */}
        <Card withBorder padding="lg">
          <Group mb="md">
            <ThemeIcon color="green" variant="light" size={40} radius="md">
              <IconUser size={24} />
            </ThemeIcon>
            <div>
              <Text fw={600} size="lg">Your Profile</Text>
              <Text c="dimmed" size="sm">Account information</Text>
            </div>
          </Group>
          <Stack gap="xs">
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Name</Text>
              <Text size="sm" fw={500}>{user?.firstName} {user?.lastName}</Text>
            </Group>
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Email</Text>
              <Text size="sm" fw={500}>{user?.email}</Text>
            </Group>
            <Group justify="space-between">
              <Text size="sm" c="dimmed">User ID</Text>
              <Text size="sm" ff="monospace" c="dimmed">{user?.id?.slice(0, 8)}...</Text>
            </Group>
          </Stack>
        </Card>

        {/* System Info */}
        <Card withBorder padding="lg">
          <Group mb="md">
            <ThemeIcon color="violet" variant="light" size={40} radius="md">
              <IconSettings size={24} />
            </ThemeIcon>
            <div>
              <Text fw={600} size="lg">System</Text>
              <Text c="dimmed" size="sm">Platform information</Text>
            </div>
          </Group>
          <Stack gap="xs">
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Platform</Text>
              <Text size="sm" fw={500}>HOA LedgerIQ</Text>
            </Group>
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Version</Text>
              <Badge variant="light">2026.03.17</Badge>
            </Group>
            <Group justify="space-between">
              <Text size="sm" c="dimmed">API</Text>
              <Text size="sm" ff="monospace" c="dimmed">/api/docs</Text>
            </Group>
            <Divider />
            <Group justify="space-between">
              <div>
                <Text size="sm">Compact View</Text>
                <Text size="xs" c="dimmed">Reduce spacing in tables and lists</Text>
              </div>
              <Switch checked={compactView} onChange={toggleCompactView} />
            </Group>
          </Stack>
        </Card>

        {/* Sessions */}
        <Card withBorder padding="lg">
          <Group mb="md">
            <ThemeIcon color="orange" variant="light" size={40} radius="md">
              <IconLogout size={24} />
            </ThemeIcon>
            <div>
              <Text fw={600} size="lg">Sessions</Text>
              <Text c="dimmed" size="sm">Manage active sessions</Text>
            </div>
          </Group>
          <Stack gap="xs">
            <Group justify="space-between">
              <Text size="sm" c="dimmed">Current Session</Text>
              <Badge color="green" variant="light">Active</Badge>
            </Group>
            <Button
              variant="light"
              color="orange"
              size="sm"
              leftSection={<IconLogout size={16} />}
              onClick={handleLogoutEverywhere}
              loading={loggingOutAll}
              mt="xs"
            >
              Log Out All Other Sessions
            </Button>
          </Stack>
        </Card>
      </SimpleGrid>

      <Divider my="md" />

      {/* Security Settings */}
      <div>
        <Title order={3} mb="sm">Security</Title>
        <Text c="dimmed" size="sm" mb="md">Manage authentication methods and security settings</Text>
      </div>

      <Tabs defaultValue="mfa">
        <Tabs.List>
          <Tabs.Tab value="mfa" leftSection={<IconShieldLock size={16} />}>
            Two-Factor Auth
          </Tabs.Tab>
          <Tabs.Tab value="passkeys" leftSection={<IconFingerprint size={16} />}>
            Passkeys
          </Tabs.Tab>
          <Tabs.Tab value="linked" leftSection={<IconLink size={16} />}>
            Linked Accounts
          </Tabs.Tab>
        </Tabs.List>

        <Tabs.Panel value="mfa" pt="md">
          <MfaSettings />
        </Tabs.Panel>

        <Tabs.Panel value="passkeys" pt="md">
          <PasskeySettings />
        </Tabs.Panel>

        <Tabs.Panel value="linked" pt="md">
          <LinkedAccounts />
        </Tabs.Panel>
      </Tabs>
    </Stack>
  );
}