import React, { useState } from 'react';
import {
  View, Text, ScrollView, TouchableOpacity, StyleSheet, Alert, Share,
} from 'react-native';
import { useLocalSearchParams, useRouter } from 'expo-router';
import { Ionicons } from '@expo/vector-icons';
import { SafeAreaView } from 'react-native-safe-area-context';
import { useFilamentStore } from '@store/filamentStore';
import { usePresetStore } from '@store/presetStore';
import { calcFilamentPercentage } from '@domain/Filament';
import { colors, typography, spacing, radius, getStockColor, getStockBgColor } from '@shared/theme';
import { formatWeight } from '@shared/utils/filament';
import { Card } from '@presentation/components/ui/Card';
import { Button } from '@presentation/components/ui/Button';
import { StockBar } from '@presentation/components/filament/StockBar';

/**
 * Tela de Detalhe do Filamento — 6L-0
 */
export default function FilamentDetailScreen(): React.ReactElement {
  const { id } = useLocalSearchParams<{ id: string }>();
  const router = useRouter();
  const { filaments, removeFilament } = useFilamentStore();
  const { presets } = usePresetStore();

  const filament = filaments.find((f) => f.id === id);
  const preset = filament ? presets.find((p) => p.id === filament.spoolPresetId) : undefined;

  if (!filament) {
    return (
      <SafeAreaView style={styles.safe}>
        <View style={styles.notFound}>
          <Text style={styles.notFoundText}>Filamento não encontrado</Text>
          <TouchableOpacity onPress={() => router.back()}>
            <Text style={styles.backLink}>Voltar</Text>
          </TouchableOpacity>
        </View>
      </SafeAreaView>
    );
  }

  const pct = calcFilamentPercentage(filament);
  const stockColor = getStockColor(pct);
  const slug = `${filament.brand.toLowerCase()}-${(filament.model ?? '').toLowerCase()}-${filament.colorHex.replace('#', '').toLowerCase()}`.replace(/\s+/g, '-');

  function handleDelete(): void {
    Alert.alert(
      'Excluir filamento',
      `Deseja excluir "${filament!.brand}${filament!.model ? ` ${filament!.model}` : ''}"? Esta ação não pode ser desfeita.`,
      [
        { text: 'Cancelar', style: 'cancel' },
        {
          text: 'Excluir',
          style: 'destructive',
          onPress: () => {
            removeFilament(filament!.id);
            router.back();
          },
        },
      ],
    );
  }

  return (
    <SafeAreaView style={styles.safe}>
      <ScrollView showsVerticalScrollIndicator={false}>
        {/* Header */}
        <View style={styles.header}>
          <TouchableOpacity onPress={() => router.back()}>
            <Ionicons name="chevron-back" size={24} color={colors.textPrimary} />
          </TouchableOpacity>
          <Text style={styles.headerTitle}>
            {filament.brand}{filament.model ? ` ${filament.model}` : ''}
          </Text>
          <View style={styles.headerActions}>
            <TouchableOpacity
              onPress={() => router.push(`/(app)/inventory/${id}/edit` as never)}
              style={styles.headerBtn}
            >
              <Ionicons name="pencil-outline" size={20} color={colors.textPrimary} />
            </TouchableOpacity>
            <TouchableOpacity onPress={handleDelete} style={styles.headerBtn}>
              <Ionicons name="trash-outline" size={20} color={colors.textPrimary} />
            </TouchableOpacity>
          </View>
        </View>

        <View style={styles.content}>
          {/* Identity Card */}
          <Card style={styles.identityCard}>
            <View style={[styles.colorSwatch, { backgroundColor: filament.colorHex }]} />
            <View style={styles.identityInfo}>
              <Text style={styles.filamentName}>
                {filament.brand}{filament.model ? ` ${filament.model}` : ''}
              </Text>
              <Text style={styles.filamentBrandLine}>
                {filament.brand} · {filament.colorHex.toLowerCase().startsWith('#') ? '' : '#'}{filament.colorHex}
              </Text>
              <View style={styles.badgeRow}>
                <View style={styles.materialBadge}>
                  <Text style={styles.materialBadgeText}>{filament.material}</Text>
                </View>
                <View style={styles.hexBadge}>
                  <Text style={styles.hexBadgeText}>{filament.colorHex}</Text>
                </View>
              </View>
            </View>
          </Card>

          {/* Filamento Disponível */}
          <Card>
            <View style={styles.stockHeader}>
              <Text style={styles.sectionLabel}>FILAMENTO DISPONÍVEL</Text>
              <View style={[styles.pctBadge, { backgroundColor: getStockBgColor(pct) }]}>
                <Text style={[styles.pctText, { color: stockColor }]}>{pct}%</Text>
              </View>
            </View>
            <View style={styles.weightRow}>
              <Text style={[styles.netWeight, { color: stockColor }]}>
                {formatWeight(filament.netWeightG)}
              </Text>
              <Text style={styles.totalWeight}>de {formatWeight(filament.totalWeightG)}</Text>
            </View>
            <StockBar percentage={pct} />
            <View style={styles.stockMeta}>
              <Text style={styles.stockMetaText}>
                Carretel: {preset?.name ?? '—'} · {preset?.spoolWeightG ?? 0}g
              </Text>
              <Text style={styles.stockMetaText}>
                Total pesado: {formatWeight(filament.totalWeightG)}
              </Text>
            </View>
          </Card>

          {/* Parâmetros de Impressão */}
          <Card>
            <Text style={styles.sectionLabel}>PARÂMETROS DE IMPRESSÃO</Text>
            <View style={styles.paramsGrid}>
              <View style={styles.paramItem}>
                <Ionicons name="thermometer-outline" size={20} color={colors.stockLow} />
                <Text style={styles.paramValue}>{filament.tempHotendC ?? '—'}°C</Text>
                <Text style={styles.paramLabel}>Hotend</Text>
              </View>
              <View style={styles.paramItem}>
                <Ionicons name="flag-outline" size={20} color={colors.stockMedium} />
                <Text style={styles.paramValue}>{filament.tempBedC ?? '—'}°C</Text>
                <Text style={styles.paramLabel}>Mesa</Text>
              </View>
              <View style={styles.paramItem}>
                <Ionicons name="time-outline" size={20} color={colors.accent} />
                <Text style={styles.paramValue}>{filament.flowFactorPct ?? '—'}%</Text>
                <Text style={styles.paramLabel}>Fluxo</Text>
              </View>
            </View>
          </Card>

          {/* Identificação */}
          <Card>
            <View style={styles.idSection}>
              {/* QR Code placeholder */}
              <View style={styles.qrPreview}>
                <Ionicons name="qr-code-outline" size={48} color={colors.textSecondary} />
              </View>
              <View style={styles.idInfo}>
                <Text style={styles.idTitle}>Identificação</Text>
                <Text style={styles.idSlug}>{slug}</Text>
                <View style={styles.idButtons}>
                  <TouchableOpacity
                    style={styles.idBtn}
                    onPress={() => router.push(`/(app)/filaments/${id}/label` as never)}
                  >
                    <Ionicons name="add-outline" size={14} color={colors.accent} />
                    <Text style={styles.idBtnText}>Exportar SVG</Text>
                  </TouchableOpacity>
                  <TouchableOpacity
                    style={[styles.idBtn, styles.idBtnSecondary]}
                    onPress={() => router.push(`/(app)/filaments/${id}/qrcode` as never)}
                  >
                    <Ionicons name="qr-code-outline" size={14} color={colors.textSecondary} />
                    <Text style={styles.idBtnTextSecondary}>Ver QR</Text>
                  </TouchableOpacity>
                </View>
              </View>
            </View>
          </Card>

          {/* Observações */}
          {filament.notes ? (
            <Card>
              <Text style={styles.sectionLabel}>OBSERVAÇÕES</Text>
              <Text style={styles.notesText}>{filament.notes}</Text>
            </Card>
          ) : null}
        </View>
      </ScrollView>

      {/* CTA fixo */}
      <View style={styles.footer}>
        <Button
          label="Pesar Novamente"
          leftIcon={<Ionicons name="scale-outline" size={18} color={colors.bgBase} />}
          onPress={() => router.push(`/(app)/inventory/${id}/edit` as never)}
        />
      </View>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  safe: { flex: 1, backgroundColor: colors.bgBase },
  notFound: { flex: 1, alignItems: 'center', justifyContent: 'center', gap: spacing[4] },
  notFoundText: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.base, color: colors.textSecondary },
  backLink: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.base, color: colors.accent },

  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingHorizontal: spacing[5],
    paddingVertical: spacing[4],
  },
  headerTitle: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.md,
    fontWeight: typography.fontWeight.semibold,
    color: colors.textPrimary,
    flex: 1,
    textAlign: 'center',
  },
  headerActions: { flexDirection: 'row', gap: spacing[2] },
  headerBtn: { padding: spacing[1] },

  content: { paddingHorizontal: spacing[5], gap: spacing[4], paddingBottom: spacing[10] },

  identityCard: { flexDirection: 'row', alignItems: 'center', gap: spacing[4] },
  colorSwatch: { width: 72, height: 72, borderRadius: radius.lg },
  identityInfo: { flex: 1, gap: spacing[1] },
  filamentName: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.lg,
    fontWeight: typography.fontWeight.bold,
    color: colors.textPrimary,
  },
  filamentBrandLine: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.sm,
    color: colors.textSecondary,
  },
  badgeRow: { flexDirection: 'row', gap: spacing[2], marginTop: spacing[1] },
  materialBadge: {
    paddingHorizontal: spacing[3],
    paddingVertical: 3,
    backgroundColor: colors.bgHover,
    borderRadius: radius.full,
  },
  materialBadgeText: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.xs,
    fontWeight: typography.fontWeight.medium,
    color: colors.textSecondary,
  },
  hexBadge: {
    paddingHorizontal: spacing[3],
    paddingVertical: 3,
    backgroundColor: colors.bgHover,
    borderRadius: radius.full,
  },
  hexBadgeText: {
    fontFamily: typography.fontFamily.mono,
    fontSize: typography.fontSize.xs,
    color: colors.textSecondary,
  },

  sectionLabel: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.xs,
    fontWeight: typography.fontWeight.bold,
    color: colors.textSecondary,
    letterSpacing: 0.8,
    textTransform: 'uppercase',
    marginBottom: spacing[3],
  },

  stockHeader: { flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center', marginBottom: spacing[2] },
  pctBadge: { paddingHorizontal: spacing[3], paddingVertical: 4, borderRadius: radius.sm },
  pctText: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.sm, fontWeight: typography.fontWeight.bold },
  weightRow: { flexDirection: 'row', alignItems: 'baseline', gap: spacing[2], marginBottom: spacing[3] },
  netWeight: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize['3xl'], fontWeight: typography.fontWeight.bold },
  totalWeight: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.sm, color: colors.textSecondary },
  stockMeta: { flexDirection: 'row', justifyContent: 'space-between', marginTop: spacing[3] },
  stockMetaText: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.xs, color: colors.textSecondary },

  paramsGrid: { flexDirection: 'row', justifyContent: 'space-around' },
  paramItem: { alignItems: 'center', gap: spacing[1] },
  paramValue: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.xl,
    fontWeight: typography.fontWeight.bold,
    color: colors.textPrimary,
  },
  paramLabel: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.xs, color: colors.textSecondary },

  idSection: { flexDirection: 'row', gap: spacing[4], alignItems: 'flex-start' },
  qrPreview: {
    width: 80,
    height: 80,
    backgroundColor: colors.bgHover,
    borderRadius: radius.md,
    alignItems: 'center',
    justifyContent: 'center',
  },
  idInfo: { flex: 1, gap: spacing[2] },
  idTitle: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.base,
    fontWeight: typography.fontWeight.semibold,
    color: colors.textPrimary,
  },
  idSlug: {
    fontFamily: typography.fontFamily.mono,
    fontSize: typography.fontSize.xs,
    color: colors.textSecondary,
  },
  idButtons: { flexDirection: 'row', gap: spacing[2], flexWrap: 'wrap' },
  idBtn: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 4,
    backgroundColor: colors.accentMuted,
    paddingHorizontal: spacing[3],
    paddingVertical: 6,
    borderRadius: radius.sm,
  },
  idBtnText: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.xs, color: colors.accent },
  idBtnSecondary: { backgroundColor: colors.bgHover },
  idBtnTextSecondary: { fontFamily: typography.fontFamily.ui, fontSize: typography.fontSize.xs, color: colors.textSecondary },

  notesText: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.base,
    color: colors.textPrimary,
    lineHeight: typography.fontSize.base * typography.lineHeight.relaxed,
  },

  footer: {
    padding: spacing[5],
    borderTopWidth: 1,
    borderTopColor: colors.border,
    backgroundColor: colors.bgBase,
  },
});