import MaterialIcons from '@expo/vector-icons/MaterialIcons';
import { router } from 'expo-router';
import React from 'react';
import { TouchableOpacity, View } from 'react-native';

import { ThemedText } from '@/components/themed-text';
import { useColorScheme } from '@/hooks/use-color-scheme';

type BillingMode = 'monthly' | 'lifetime';

const BILLING_OPTIONS: { key: BillingMode; label: string }[] = [
  { key: 'monthly', label: '月付' },
];

export function ProfileHeader({
  billingMode,
  onChangeBilling,
  credits,
}: {
  billingMode: BillingMode;
  onChangeBilling: (mode: BillingMode) => void;
  credits: number;
}) {
  const colorScheme = useColorScheme();
  const palette = colorScheme === 'dark' ? darkPalette : lightPalette;

  return (
    <View style={styles.headerRow}>
      <TouchableOpacity
        onPress={() => router.push('/settings/account')}
        style={[styles.settingsButton, { backgroundColor: palette.pill }]}
        activeOpacity={0.85}
      >
        <MaterialIcons name="settings" size={24} color={palette.textPrimary} />
      </TouchableOpacity>
      <BillingBadge
        palette={palette}
        billingMode={billingMode}
        onChangeBilling={onChangeBilling}
        credits={credits}
      />
    </View>
  );
}

function BillingBadge({
  palette,
  billingMode,
  onChangeBilling,
  credits,
}: {
  palette: any;
  billingMode: BillingMode;
  onChangeBilling: (mode: BillingMode) => void;
  credits: number;
}) {
  return (
    <View style={[styles.billingShell, { backgroundColor: palette.pill, borderColor: palette.border }]}>
      <View style={styles.billingOptions}>
        {BILLING_OPTIONS.map(option => {
          const isActive = option.key === billingMode;
          return (
            <TouchableOpacity
              key={option.key}
              onPress={() => router.push('/exchange')}
              activeOpacity={0.85}
              style={[
                styles.billingOption,
                {
                  backgroundColor: isActive ? palette.tabActive : 'transparent',
                },
              ]}
            >
              <ThemedText
                style={[
                  styles.billingLabel,
                  {
                    color: isActive ? palette.onAccent : palette.textSecondary,
                  },
                ]}
              >
                {option.label}
              </ThemedText>
            </TouchableOpacity>
          );
        })}
      </View>
      <TouchableOpacity
        onPress={() => router.push('/exchange')}
        activeOpacity={0.85}
        style={[
          styles.lightningShell,
          {
            backgroundColor: palette.elevated,
            borderColor: palette.border,
          },
        ]}
      >
        <MaterialIcons name="flash-on" size={16} color={palette.accent} />
        <ThemedText style={[styles.lightningValue, { color: palette.textPrimary }]}>{credits}</ThemedText>
      </TouchableOpacity>
    </View>
  );
}

const darkPalette = {
  pill: '#16171C',
  border: '#1D1E24',
  tabActive: '#FFFFFF',
  onAccent: '#050505',
  textSecondary: '#8E9098',
  textPrimary: '#F6F7FA',
  accent: '#B7FF2F',
  elevated: '#101014',
};

const lightPalette = {
  pill: '#E8EBF4',
  border: '#E2E5ED',
  tabActive: '#FFFFFF',
  onAccent: '#FFFFFF',
  textSecondary: '#5E6474',
  textPrimary: '#0F1320',
  accent: '#405CFF',
  elevated: '#F0F2F8',
};

const styles = {
  headerRow: {
    flexDirection: 'row' as const,
    alignItems: 'center' as const,
    justifyContent: 'space-between' as const,
    marginBottom: 14,
    marginTop: 14
  },
  settingsButton: {
    width: 44,
    height: 44,
    borderRadius: 22,
    alignItems: 'center' as const,
    justifyContent: 'center' as const,
  },
  billingShell: {
    flexDirection: 'row' as const,
    alignItems: 'center' as const,
    padding: 4,
    borderWidth: 1,
    borderRadius: 999,
  },
  billingOptions: {
    flexDirection: 'row' as const,
    alignItems: 'center' as const,
  },
  billingOption: {
    paddingHorizontal: 16,
    paddingVertical: 6,
    borderRadius: 999,
  },
  billingLabel: {
    fontSize: 13,
    fontWeight: '600' as const,
  },
  lightningShell: {
    flexDirection: 'row' as const,
    alignItems: 'center' as const,
    borderWidth: 1,
    borderRadius: 999,
    paddingHorizontal: 12,
    paddingVertical: 6,
    marginLeft: 8,
  },
  lightningValue: {
    fontSize: 13,
    fontWeight: '600' as const,
    marginLeft: 6,
  },
};