import { useState } from 'react';
import { useMutation, useQuery } from '@tanstack/react-query';
import { MdBadge, MdPerson, MdLocationOn, MdMail, MdShield, MdVerifiedUser, MdLock } from 'react-icons/md';
import { enqueueSnackbar } from 'notistack';

import { Grid } from '@astryxdesign/core/Grid';
import { HStack } from '@astryxdesign/core/HStack';
import { VStack } from '@astryxdesign/core/VStack';
import { Card } from '@astryxdesign/core/Card';
import { Text } from '@astryxdesign/core/Text';
import { Button } from '@astryxdesign/core/Button';
import { TextInput } from '@astryxdesign/core/TextInput';
import { Badge } from '@astryxdesign/core/Badge';
import { Avatar } from '@astryxdesign/core/Avatar';
import { Divider } from '@astryxdesign/core/Divider';

import Loader from 'components/Loader';
import PageHeader from 'components/nearle_components/PageHeader';
import { PageShell } from 'components/nearle_components/PageLayout';
import { getusers } from 'pages/api/api';
import { updateProfilePassword } from 'pages/api/doormileApi';
import { DT } from 'themes/dt/tokens';
import { AccentAvatar } from 'themes/dt/primitives';

const ROLE_LABELS = { 1: 'Admin', 3: 'Manager', 4: 'Executive' };

const BRAND = DT.brand;

// A single read-only field rendered as an icon + uppercase label + value.
const InfoField = ({ icon: Icon, label, value, accent = BRAND }) => (
  <HStack gap={3} vAlign="start">
    <AccentAvatar color={accent} selected size={36}>
      <Icon size={18} />
    </AccentAvatar>
    <VStack gap={0} padding={0}>
      <Text type="label" weight="semibold" color="secondary">
        {label}
      </Text>
      <Text weight="semibold" title={value || ''}>
        {value || '—'}
      </Text>
    </VStack>
  </HStack>
);

// A titled grouping card.
const SectionCard = ({ title, icon: Icon, children }) => (
  <Card padding={0} elevation="none">
    <HStack gap={2} vAlign="center" padding={3} style={{ borderBottom: `1px solid ${DT.divider}`, backgroundColor: DT.surfaceAlt }}>
      <AccentAvatar color={BRAND} selected size={28}>
        <Icon size={16} />
      </AccentAvatar>
      <Text weight="bold">{title}</Text>
    </HStack>
    <VStack gap={0} padding={3}>
      {children}
    </VStack>
  </Card>
);

const ViewProfile = () => {
  const { data: userData, isLoading } = useQuery({
    queryKey: ['getuser'],
    queryFn: getusers
  });

  const [currentPassword, setCurrentPassword] = useState('');
  const [newPassword, setNewPassword] = useState('');
  const [confirmPassword, setConfirmPassword] = useState('');

  const opentoast = (message, variant = 'error') =>
    enqueueSnackbar(message, { variant, anchorOrigin: { vertical: 'top', horizontal: 'right' }, autoHideDuration: 2000 });

  const changePasswordMutation = useMutation({
    mutationFn: () => updateProfilePassword(currentPassword, newPassword),
    onSuccess: (res) => {
      if (res.success) {
        opentoast('Password updated successfully', 'success');
        setCurrentPassword('');
        setNewPassword('');
        setConfirmPassword('');
      } else {
        opentoast(res.message || 'Failed to update password');
      }
    },
    onError: (err) => opentoast(err.response?.data?.message || err.message || 'Failed to update password')
  });

  const handleChangePassword = () => {
    if (!currentPassword || !newPassword) {
      opentoast('Fill current and new password');
      return;
    }
    if (newPassword !== confirmPassword) {
      opentoast('New password and confirmation do not match');
      return;
    }
    changePasswordMutation.mutate();
  };

  // GET /admin/profile has no documented schema, but the console's own login
  // response ({ success, token, user: { id, name, email, role, tenantid } })
  // is confirmed — /admin/profile almost certainly returns the same "user"
  // shape. Fields like address/suburb/city/postcode were jupiter-era guesses
  // with no basis in the new API and have been dropped rather than shown blank.
  const fullname = userData?.name || userData?.fullname || 'User Profile';
  const roleLabel = ROLE_LABELS[userData?.role] || ROLE_LABELS[userData?.roleid] || userData?.role || '—';
  const tenantLabel = userData?.tenantid ? `Tenant #${userData.tenantid}` : 'Doormile staff (all tenants)';

  return (
    <>
      {isLoading && <Loader />}

      <PageShell>
        <PageHeader title="My Profile" subtitle="Account & Security" />

        <Card padding={4} elevation="none">
          <HStack gap={3} vAlign="center" wrap="wrap">
            <Avatar name={fullname} size={72} tooltip={false} />
            <VStack gap={2} padding={0}>
              <Text type="heading" weight="bold">
                {fullname}
              </Text>
              <HStack gap={2} vAlign="center" wrap="wrap">
                {roleLabel !== '—' && <Badge variant="neutral" icon={<MdVerifiedUser size={14} />} label={roleLabel} />}
                {(userData?.id != null || userData?.userid != null) && (
                  <Text color="secondary" weight="semibold">
                    ID #{userData.id ?? userData.userid}
                  </Text>
                )}
                <HStack gap={1} vAlign="center">
                  <MdLocationOn size={15} color={DT.textSecondary} />
                  <Text color="secondary" weight="semibold">
                    {tenantLabel}
                  </Text>
                </HStack>
              </HStack>
            </VStack>
          </HStack>
        </Card>

        <Grid columns={{ minWidth: 320, repeat: 'fit' }} gap={3}>
          <SectionCard title="Account" icon={MdBadge}>
            <VStack gap={4} padding={0}>
              <InfoField icon={MdPerson} label="User Name" value={userData?.name || userData?.fullname} />
              <InfoField icon={MdBadge} label="User ID" value={userData?.id ?? userData?.userid} />
              <InfoField icon={MdMail} label="E-Mail" value={userData?.email} accent="#0ea5e9" />
              <InfoField icon={MdVerifiedUser} label="Role" value={roleLabel} />
              <InfoField icon={MdLocationOn} label="Tenant" value={tenantLabel} accent="#14b8a6" />
            </VStack>
          </SectionCard>

          <SectionCard title="Security" icon={MdShield}>
            <VStack gap={3} padding={0}>
              <TextInput
                label="Current Password"
                type="password"
                value={currentPassword}
                onChange={setCurrentPassword}
                placeholder="Current password"
              />
              <TextInput label="New Password" type="password" value={newPassword} onChange={setNewPassword} placeholder="New password" />
              <TextInput
                label="Confirm New Password"
                type="password"
                value={confirmPassword}
                onChange={setConfirmPassword}
                placeholder="Confirm new password"
              />
              <Divider />
              <Button
                label="Update Password"
                variant="primary"
                icon={<MdLock size={16} />}
                onClick={handleChangePassword}
                isLoading={changePasswordMutation.isPending}
                style={{ alignSelf: 'flex-start' }}
              />
            </VStack>
          </SectionCard>
        </Grid>
      </PageShell>
    </>
  );
};

export default ViewProfile;