/**
 * Template "Classique" — sobre, sérieux, header texte centré.
 *
 * Cible : cabinets, professions réglementées, structures traditionnelles.
 * Pas de bandeau coloré, pas d'ornementation. L'accent color est utilisé
 * uniquement pour les filets de séparation et le numéro de facture.
 */

import React from 'react'
import { Document, Page, View, Text, Image, StyleSheet } from '@react-pdf/renderer'
import {
  type InvoiceTemplateProps,
  PALETTE,
  formatCents,
  formatDate,
  formatQuantity,
  formatTvaRate,
  formatAddress,
  daysBetween,
} from '#pdf-templates/common'

const styles = StyleSheet.create({
  page: {
    paddingTop: 56,
    paddingBottom: 56,
    paddingHorizontal: 56,
    fontSize: 10,
    color: PALETTE.ink,
    fontFamily: 'Helvetica',
    lineHeight: 1.5,
  },
  // Header
  headerCenter: { textAlign: 'center', marginBottom: 24 },
  logo: { width: 80, height: 32, objectFit: 'contain', marginBottom: 8, alignSelf: 'center' },
  companyName: { fontSize: 16, fontWeight: 'bold', marginBottom: 4 },
  companyMeta: { fontSize: 9, color: PALETTE.ink2 },
  divider: { borderBottomWidth: 1, marginVertical: 16 },
  // Titre facture
  invoiceBlock: { flexDirection: 'row', justifyContent: 'space-between', marginBottom: 20 },
  invoiceTitle: { fontSize: 22, fontWeight: 'bold' },
  invoiceMeta: { fontSize: 10 },
  invoiceMetaRow: { flexDirection: 'row', justifyContent: 'space-between', gap: 12 },
  invoiceMetaLabel: { color: PALETTE.ink2 },
  // Client
  clientBlock: {
    borderWidth: 1,
    borderColor: PALETTE.line,
    padding: 12,
    marginBottom: 20,
    width: '50%',
    alignSelf: 'flex-end',
  },
  clientLabel: { fontSize: 8, textTransform: 'uppercase', color: PALETTE.ink3, marginBottom: 4 },
  clientName: { fontSize: 11, fontWeight: 'bold' },
  // Table
  table: { marginBottom: 16 },
  tableHeader: {
    flexDirection: 'row',
    borderBottomWidth: 1,
    paddingBottom: 6,
    marginBottom: 4,
  },
  tableRow: {
    flexDirection: 'row',
    paddingVertical: 6,
    borderBottomWidth: 0.5,
    borderBottomColor: PALETTE.line,
  },
  cellDesc: { flex: 4 },
  cellQty: { flex: 1, textAlign: 'right' },
  cellPu: { flex: 1.5, textAlign: 'right' },
  cellTva: { flex: 1, textAlign: 'right' },
  cellTotal: { flex: 1.5, textAlign: 'right' },
  cellHead: { fontSize: 8, textTransform: 'uppercase', color: PALETTE.ink3, fontWeight: 'bold' },
  // Totals
  totalsBlock: { alignSelf: 'flex-end', width: '45%', marginBottom: 24 },
  totalRow: { flexDirection: 'row', justifyContent: 'space-between', paddingVertical: 3 },
  totalRowGrand: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    paddingVertical: 8,
    marginTop: 4,
    borderTopWidth: 1,
  },
  totalLabel: { color: PALETTE.ink2 },
  grandLabel: { fontSize: 12, fontWeight: 'bold' },
  grandAmount: { fontSize: 12, fontWeight: 'bold' },
  // TVA breakdown
  tvaBlock: { marginBottom: 16, width: '60%' },
  tvaHeader: { flexDirection: 'row', borderBottomWidth: 0.5, borderBottomColor: PALETTE.line, paddingBottom: 3 },
  tvaRow: { flexDirection: 'row', paddingVertical: 2 },
  tvaCell: { flex: 1, textAlign: 'right', fontSize: 9 },
  tvaCellLeft: { flex: 1, textAlign: 'left', fontSize: 9, color: PALETTE.ink2 },
  // Footer
  paymentBlock: { marginTop: 12, marginBottom: 12 },
  paymentLabel: {
    fontSize: 8,
    textTransform: 'uppercase',
    color: PALETTE.ink3,
    marginBottom: 4,
  },
  legalBlock: {
    marginTop: 'auto',
    paddingTop: 12,
    borderTopWidth: 0.5,
    borderTopColor: PALETTE.line,
    fontSize: 7,
    color: PALETTE.ink3,
    lineHeight: 1.4,
  },
})

export function ClassiqueTemplate(props: InvoiceTemplateProps) {
  const accent = { color: props.accentColor }
  const dividerAccent = { borderBottomColor: props.accentColor }
  const grandAccent = { borderTopColor: props.accentColor }
  const issuerAddress = formatAddress({
    line1: props.issuer.addressLine1,
    line2: props.issuer.addressLine2,
    zip: props.issuer.addressZip,
    city: props.issuer.addressCity,
    country: props.issuer.addressCountry,
  })
  const clientAddress = formatAddress({
    line1: props.client.addressLine1,
    line2: props.client.addressLine2,
    zip: props.client.addressZip,
    city: props.client.addressCity,
    country: props.client.addressCountry,
  })
  const showTvaBreakdown = props.tvaBreakdown.length > 1

  return (
    <Document>
      <Page size="A4" style={styles.page}>
        {/* Header centré : logo + identité émetteur */}
        <View style={styles.headerCenter}>
          {props.logoUrl ? <Image src={props.logoUrl} style={styles.logo} /> : null}
          <Text style={styles.companyName}>{props.issuer.companyName ?? '—'}</Text>
          {issuerAddress.map((line, i) => (
            <Text key={`addr-${i}`} style={styles.companyMeta}>
              {line}
            </Text>
          ))}
          {props.issuer.siret ? (
            <Text style={styles.companyMeta}>SIRET {props.issuer.siret}</Text>
          ) : null}
          {props.issuer.tvaIntra ? (
            <Text style={styles.companyMeta}>TVA {props.issuer.tvaIntra}</Text>
          ) : null}
        </View>

        <View style={[styles.divider, dividerAccent]} />

        {/* Bloc facture (gauche) + meta (droite) */}
        <View style={styles.invoiceBlock}>
          <View>
            <Text style={[styles.invoiceTitle, accent]}>FACTURE</Text>
            <Text style={styles.invoiceMeta}>N° {props.numero}</Text>
          </View>
          <View style={{ minWidth: 180 }}>
            <View style={styles.invoiceMetaRow}>
              <Text style={styles.invoiceMetaLabel}>Date d'émission</Text>
              <Text>{formatDate(props.issueDate)}</Text>
            </View>
            <View style={styles.invoiceMetaRow}>
              <Text style={styles.invoiceMetaLabel}>Date d'échéance</Text>
              <Text>{formatDate(props.dueDate)}</Text>
            </View>
            <View style={styles.invoiceMetaRow}>
              <Text style={styles.invoiceMetaLabel}>Délai</Text>
              <Text>
                {props.paymentTermsDays} jour{props.paymentTermsDays > 1 ? 's' : ''}
              </Text>
            </View>
          </View>
        </View>

        {/* Client */}
        <View style={styles.clientBlock}>
          <Text style={styles.clientLabel}>Adressée à</Text>
          <Text style={styles.clientName}>{props.client.name}</Text>
          {clientAddress.map((line, i) => (
            <Text key={`cli-${i}`} style={styles.companyMeta}>
              {line}
            </Text>
          ))}
          {props.client.siret ? (
            <Text style={styles.companyMeta}>SIRET {props.client.siret}</Text>
          ) : null}
          {props.client.tvaIntra ? (
            <Text style={styles.companyMeta}>TVA {props.client.tvaIntra}</Text>
          ) : null}
        </View>

        {/* Table des lignes */}
        <View style={styles.table}>
          <View style={styles.tableHeader}>
            <Text style={[styles.cellDesc, styles.cellHead]}>Désignation</Text>
            <Text style={[styles.cellQty, styles.cellHead]}>Qté</Text>
            <Text style={[styles.cellPu, styles.cellHead]}>P.U. HT</Text>
            <Text style={[styles.cellTva, styles.cellHead]}>TVA</Text>
            <Text style={[styles.cellTotal, styles.cellHead]}>Total HT</Text>
          </View>
          {props.lines.map((l) => (
            <View key={l.id} style={styles.tableRow}>
              <Text style={styles.cellDesc}>{l.description}</Text>
              <Text style={styles.cellQty}>{formatQuantity(l.quantity)}</Text>
              <Text style={styles.cellPu}>{formatCents(l.unitPriceCents)}</Text>
              <Text style={styles.cellTva}>{formatTvaRate(l.tvaRate)}</Text>
              <Text style={styles.cellTotal}>{formatCents(l.totalHtCents)}</Text>
            </View>
          ))}
        </View>

        {/* Ventilation TVA — affichée seulement si plusieurs taux */}
        {showTvaBreakdown ? (
          <View style={styles.tvaBlock}>
            <View style={styles.tvaHeader}>
              <Text style={[styles.tvaCellLeft, styles.cellHead]}>Taux</Text>
              <Text style={[styles.tvaCell, styles.cellHead]}>Base HT</Text>
              <Text style={[styles.tvaCell, styles.cellHead]}>Montant TVA</Text>
            </View>
            {props.tvaBreakdown.map((b) => (
              <View key={`tva-${b.rate}`} style={styles.tvaRow}>
                <Text style={styles.tvaCellLeft}>{formatTvaRate(b.rate)}</Text>
                <Text style={styles.tvaCell}>{formatCents(b.htCents)}</Text>
                <Text style={styles.tvaCell}>{formatCents(b.tvaCents)}</Text>
              </View>
            ))}
          </View>
        ) : null}

        {/* Totaux */}
        <View style={styles.totalsBlock}>
          <View style={styles.totalRow}>
            <Text style={styles.totalLabel}>Total HT</Text>
            <Text>{formatCents(props.amountHtCents)}</Text>
          </View>
          <View style={styles.totalRow}>
            <Text style={styles.totalLabel}>TVA</Text>
            <Text>{formatCents(props.amountTvaCents)}</Text>
          </View>
          <View style={[styles.totalRowGrand, grandAccent]}>
            <Text style={[styles.grandLabel, accent]}>Total TTC</Text>
            <Text style={[styles.grandAmount, accent]}>
              {formatCents(props.amountTtcCents)}
            </Text>
          </View>
        </View>

        {/* Paiement / RIB */}
        {props.rib.iban || props.rib.bic ? (
          <View style={styles.paymentBlock}>
            <Text style={styles.paymentLabel}>Coordonnées de paiement</Text>
            {props.rib.bankName ? <Text>{props.rib.bankName}</Text> : null}
            {props.rib.iban ? <Text>IBAN : {props.rib.iban}</Text> : null}
            {props.rib.bic ? <Text>BIC : {props.rib.bic}</Text> : null}
          </View>
        ) : null}

        {props.footerNotes ? (
          <View style={styles.paymentBlock}>
            <Text style={styles.paymentLabel}>Notes</Text>
            <Text>{props.footerNotes}</Text>
          </View>
        ) : null}

        {/* Pied légal */}
        <View style={styles.legalBlock}>
          <Text>{props.penaltyRateText}</Text>
          <Text>{props.escompteText}</Text>
          {props.footerLegalText ? <Text>{props.footerLegalText}</Text> : null}
          {props.issuer.rcs || props.issuer.capital ? (
            <Text>
              {[props.issuer.formeJuridique, props.issuer.capital, props.issuer.rcs]
                .filter(Boolean)
                .join(' · ')}
            </Text>
          ) : null}
          <Text>
            Échéance : {formatDate(props.dueDate)} (
            {daysBetween(props.issueDate, props.dueDate)} jours)
          </Text>
        </View>
      </Page>
    </Document>
  )
}