/**
 * VoteEditor 投票编辑器组件
 * 用于创建帖子时编辑投票选项
 */

import React, { useCallback } from 'react';
import {
  View,
  TouchableOpacity,
  StyleSheet,
  TextInput,
} from 'react-native';
import { MaterialCommunityIcons } from '@expo/vector-icons';
import { colors, spacing, fontSizes, borderRadius } from '../../theme';
import Text from '../common/Text';

interface VoteEditorProps {
  options: string[];
  onAddOption: () => void;
  onRemoveOption: (index: number) => void;
  onUpdateOption: (index: number, value: string) => void;
  maxOptions?: number;
  minOptions?: number;
  maxLength?: number;
}

const VoteEditor: React.FC<VoteEditorProps> = ({
  options,
  onAddOption,
  onRemoveOption,
  onUpdateOption,
  maxOptions = 10,
  minOptions = 2,
  maxLength = 50,
}) => {
  const validOptionsCount = options.filter(opt => opt.trim() !== '').length;
  const canAddOption = options.length < maxOptions;
  const canRemoveOption = options.length > minOptions;

  return (
    <View style={styles.container}>
      {/* 标题栏 */}
      <View style={styles.header}>
        <View style={styles.headerLeft}>
          <MaterialCommunityIcons
            name="vote"
            size={18}
            color={colors.primary.main}
          />
          <Text variant="body" style={styles.headerTitle}>
            投票选项
          </Text>
        </View>
        <Text variant="caption" color={colors.text.hint}>
          {validOptionsCount}/{maxOptions} 个有效选项
        </Text>
      </View>

      {/* 选项列表 */}
      <View style={styles.optionsContainer}>
        {options.map((option, index) => (
          <View key={index} style={styles.optionRow}>
            <View style={styles.optionIndex}>
              <Text variant="caption" color={colors.text.hint}>
                {index + 1}
              </Text>
            </View>
            <TextInput
              style={styles.optionInput}
              value={option}
              onChangeText={(text) => onUpdateOption(index, text)}
              placeholder={`输入选项 ${index + 1}`}
              placeholderTextColor={colors.text.hint}
              maxLength={maxLength}
              returnKeyType="done"
            />
            {canRemoveOption && (
              <TouchableOpacity
                style={styles.removeButton}
                onPress={() => onRemoveOption(index)}
                hitSlop={{ top: 8, right: 8, bottom: 8, left: 8 }}
              >
                <MaterialCommunityIcons
                  name="close-circle"
                  size={20}
                  color={colors.text.hint}
                />
              </TouchableOpacity>
            )}
            {!canRemoveOption && options.length <= minOptions && (
              <View style={styles.removeButtonPlaceholder} />
            )}
          </View>
        ))}

        {/* 添加选项按钮 */}
        {canAddOption && (
          <TouchableOpacity
            style={styles.addOptionButton}
            onPress={onAddOption}
            activeOpacity={0.7}
          >
            <MaterialCommunityIcons
              name="plus-circle-outline"
              size={20}
              color={colors.primary.main}
            />
            <Text variant="body" color={colors.primary.main} style={styles.addOptionText}>
              添加选项
            </Text>
          </TouchableOpacity>
        )}
      </View>

      {/* 提示信息 */}
      <View style={styles.hintContainer}>
        <Text variant="caption" color={colors.text.hint}>
          至少需要 {minOptions} 个非空选项才能发布投票
        </Text>
      </View>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    backgroundColor: colors.background.default,
    borderRadius: borderRadius.lg,
    marginHorizontal: spacing.lg,
    marginTop: spacing.md,
    marginBottom: spacing.md,
    padding: spacing.md,
  },
  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    marginBottom: spacing.md,
  },
  headerLeft: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: spacing.sm,
  },
  headerTitle: {
    fontWeight: '600',
    color: colors.text.primary,
  },
  optionsContainer: {
    gap: spacing.sm,
  },
  optionRow: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: spacing.sm,
  },
  optionIndex: {
    width: 20,
    height: 20,
    borderRadius: borderRadius.full,
    backgroundColor: colors.background.disabled,
    justifyContent: 'center',
    alignItems: 'center',
  },
  optionInput: {
    flex: 1,
    fontSize: fontSizes.md,
    color: colors.text.primary,
    backgroundColor: colors.background.paper,
    borderRadius: borderRadius.md,
    paddingHorizontal: spacing.md,
    paddingVertical: spacing.sm,
    borderWidth: 1,
    borderColor: colors.divider,
    height: 44,
  },
  removeButton: {
    padding: spacing.xs,
  },
  removeButtonPlaceholder: {
    width: 28,
  },
  addOptionButton: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'center',
    gap: spacing.sm,
    paddingVertical: spacing.sm,
    marginTop: spacing.xs,
  },
  addOptionText: {
    fontWeight: '500',
  },
  hintContainer: {
    marginTop: spacing.md,
    paddingTop: spacing.sm,
    borderTopWidth: StyleSheet.hairlineWidth,
    borderTopColor: colors.divider,
    alignItems: 'center',
  },
});

export default VoteEditor;