import { useEffect, useState } from 'react';
import { getCurrentUser } from '../../auth/services/sessionService';
import { getContactProfile, saveContactProfile } from '../services/contactProfileService';

function getUserId(user) {
  const value = user?.databaseId || user?.id;
  const numeric = Number(value);
  return Number.isFinite(numeric) ? numeric : null;
}

function formatPhone(phone) {
  const digits = String(phone || '').replace(/\D/g, '');
  if (!digits) return 'Telefone não disponível';

  if (digits.startsWith('55') && digits.length === 13) {
    return `+55 (${digits.slice(2, 4)}) ${digits.slice(4, 9)}-${digits.slice(9)}`;
  }

  if (digits.startsWith('55') && digits.length === 12) {
    return `+55 (${digits.slice(2, 4)}) ${digits.slice(4, 8)}-${digits.slice(8)}`;
  }

  if (digits.length === 11) {
    return `(${digits.slice(0, 2)}) ${digits.slice(2, 7)}-${digits.slice(7)}`;
  }

  if (digits.length === 10) {
    return `(${digits.slice(0, 2)}) ${digits.slice(2, 6)}-${digits.slice(6)}`;
  }

  return phone;
}

export function ContactProfilePanel({ isOpen, contact, onClose, onSaved }) {
  const [profile, setProfile] = useState(null);
  const [form, setForm] = useState({ name: '', company: '', note: '' });
  const [isSaving, setIsSaving] = useState(false);
  const [error, setError] = useState('');

  useEffect(() => {
    let isMounted = true;

    async function loadProfile() {
      if (!isOpen || !contact?.id) return;
      try {
        const data = await getContactProfile(contact.id);
        if (!isMounted) return;
        setProfile(data);
        setForm({
          name: data.name || contact.name || '',
          company: data.company || '',
          note: data.note || '',
        });
        setError('');
      } catch (err) {
        if (isMounted) setError(err.message);
      }
    }

    loadProfile();
    return () => {
      isMounted = false;
    };
  }, [isOpen, contact?.id]);

  if (!isOpen) {
    return null;
  }

  const fieldStyle = {
    width: '100%',
    border: '1px solid var(--color-border)',
    borderRadius: '16px',
    padding: '0.9rem 1rem',
    background: '#fff',
    outline: 'none',
  };

  async function submit() {
    if (!contact?.id) return;
    setIsSaving(true);
    try {
      const userId = getUserId(getCurrentUser());
      const saved = await saveContactProfile(contact.id, {
        phone: profile?.phone || contact?.contactProfile?.phone || '',
        name: form.name,
        company: form.company,
        note: form.note,
        userId,
      });
      setProfile(saved);
      onSaved?.(contact.id, saved);
      setError('');
    } catch (err) {
      setError(err.message);
    } finally {
      setIsSaving(false);
    }
  }

  return (
    <aside
      style={{
        background: '#fff',
        border: '1px solid var(--color-border)',
        borderRadius: '28px',
        padding: '1.25rem',
        display: 'grid',
        gap: '1rem',
      }}
    >
      <div style={{ display: 'flex', justifyContent: 'space-between', gap: '1rem' }}>
        <div>
          <strong style={{ display: 'block', fontSize: '1.06rem' }}>Contato do cliente</strong>
          <span style={{ color: 'var(--color-text-soft)' }}>
            Atualize os dados de agenda deste atendimento.
          </span>
        </div>
        <button
          type="button"
          onClick={onClose}
          style={{
            border: 'none',
            background: 'transparent',
            color: 'var(--color-text-soft)',
            fontWeight: 700,
          }}
        >
          Fechar
        </button>
      </div>

      <label style={{ display: 'grid', gap: '0.45rem' }}>
        <span style={{ fontWeight: 600 }}>Nome</span>
        <input
          value={form.name}
          onChange={(event) => setForm((current) => ({ ...current, name: event.target.value }))}
          style={fieldStyle}
        />
      </label>

      <label style={{ display: 'grid', gap: '0.45rem' }}>
        <span style={{ fontWeight: 600 }}>Etiqueta de identificação</span>
        <input
          value={form.company}
          onChange={(event) => setForm((current) => ({ ...current, company: event.target.value }))}
          placeholder="Ex: Departamento, vaga ou conta vinculada"
          style={fieldStyle}
        />
      </label>

      <label style={{ display: 'grid', gap: '0.45rem' }}>
        <span style={{ fontWeight: 600 }}>Telefone</span>
        <input
          value={formatPhone(profile?.phone || contact?.contactProfile?.phone)}
          disabled
          style={{
            ...fieldStyle,
            background: 'rgba(0, 49, 80, 0.04)',
            color: 'var(--color-text-soft)',
            fontWeight: 700,
          }}
        />
      </label>

      <label style={{ display: 'grid', gap: '0.45rem' }}>
        <span style={{ fontWeight: 600 }}>Observação</span>
        <textarea
          rows={5}
          value={form.note}
          onChange={(event) => setForm((current) => ({ ...current, note: event.target.value }))}
          placeholder="Informações relevantes do cliente."
          style={{ ...fieldStyle, resize: 'vertical' }}
        />
      </label>

      {error ? <span style={{ color: '#b42318', fontWeight: 700 }}>{error}</span> : null}

      <button
        type="button"
        onClick={submit}
        disabled={isSaving}
        style={{
          border: 'none',
          borderRadius: '16px',
          padding: '0.95rem 1rem',
          background: 'linear-gradient(135deg, var(--color-primary), #0b5a86)',
          color: '#fff',
          fontWeight: 700,
          opacity: isSaving ? 0.65 : 1,
        }}
      >
        {isSaving ? 'Salvando...' : 'Salvar contato'}
      </button>
    </aside>
  );
}