import React, { useState } from 'react';
import { View, Text, TouchableOpacity, ActivityIndicator, ScrollView } from 'react-native';
import { PieChart } from 'react-native-gifted-charts';
import Icon from 'react-native-vector-icons/Ionicons';
import { useTheme } from '@theme';
import { getStyles } from './leadDistribution.styles';
import { LeadDistributionProps } from './leadDistribution.props';

export const LeadDistribution = ({
  data = [],
  loading = false,
  activeAction,
  onActionChange,
}: LeadDistributionProps) => {
  const { theme: colors, isDark } = useTheme();
  const styles = getStyles(colors, isDark);
  const [menuVisible, setMenuVisible] = useState(false);

  const actions = [
    { label: 'Today', value: 'today' },
    { label: 'Week', value: 'week' },
    { label: 'Month', value: 'month' },
    { label: 'Quarter', value: 'quarter' },
    { label: 'Half year', value: 'halfyear' },
    { label: 'Year', value: 'year' },
    { label: 'All', value: 'all' },
  ];

  const currentActionLabel =
    actions.find((a) => a.value === activeAction)?.label || 'Month';

  const totalLeadItem = data.find((item) => item.name === 'Total Lead');
  const totalCount = totalLeadItem
    ? totalLeadItem.count
    : data.reduce((sum, item) => sum + item.count, 0);

  const displayData = data
    .filter((item) => item.name !== 'Total Lead' && item.count > 0)
    .map((item) => ({
      ...item,
      percentage: totalCount > 0 ? Math.round((item.count / totalCount) * 100) : 0,
    }));

  const pieData = displayData.map((item) => ({
    value: item.count,
    color: item.color,
  }));

  const renderCenterLabel = () => {
    return (
      <View style={styles.centerLabelContainer}>
        <Text style={styles.centerNumber}>{totalCount}</Text>
        <Text style={styles.centerText}>Total</Text>
      </View>
    );
  };

  return (
    <View style={[styles.card, menuVisible && { zIndex: 10, elevation: 10 }]}>
      {/* Header */}
      <View style={styles.header}>
        <View style={styles.titleRow}>
          <View style={styles.titleIconBadge}>
            <Icon name="pie-chart" size={15} color="#FFFFFF" />
          </View>
          <View>
            <Text style={styles.title}>Lead Distribution</Text>
            <Text style={styles.subtitle}>by status · {currentActionLabel}</Text>
          </View>
        </View>

        <TouchableOpacity
          style={styles.dropdown}
          onPress={() => setMenuVisible(!menuVisible)}
          activeOpacity={0.7}
        >
          <View style={styles.dropdownDot} />
          <Text style={styles.dropdownText}>{currentActionLabel}</Text>
          <Icon
            name={menuVisible ? 'chevron-up' : 'chevron-down'}
            size={13}
            color={colors.icon}
          />
        </TouchableOpacity>
      </View>

      {/* Dropdown Menu */}
      {menuVisible && (
        <View style={styles.menuOverlay}>
          {actions.map((act) => {
            const isSelected = act.value === activeAction;
            return (
              <TouchableOpacity
                key={act.value}
                style={[styles.menuItem, isSelected && styles.menuItemActive]}
                onPress={() => {
                  onActionChange(act.value);
                  setMenuVisible(false);
                }}
              >
                <Text style={[styles.menuItemText, isSelected && styles.menuItemTextActive]}>
                  {act.label}
                </Text>
                {isSelected && (
                  <Icon name="checkmark" size={14} color={colors.icon} />
                )}
              </TouchableOpacity>
            );
          })}
        </View>
      )}

      {/* Divider */}
      <View style={styles.divider} />

      {/* Body — fixed min-height so card never jumps */}
      <View style={styles.body}>
        {loading ? (
          <View style={styles.loaderContainer}>
            <ActivityIndicator size="large" color={colors.icon} />
          </View>
        ) : displayData.length === 0 ? (
          <View style={styles.loaderContainer}>
            <Text style={{ color: colors.textSecondary, fontSize: 13 }}>
              No lead data available
            </Text>
          </View>
        ) : (
          <>
            <View style={styles.chartContainer}>
              <PieChart
                data={pieData}
                donut
                radius={60}
                innerRadius={45}
                innerCircleColor={colors.card}
                centerLabelComponent={renderCenterLabel}
              />
            </View>

            <ScrollView
              style={styles.legendContainer}
              showsVerticalScrollIndicator={false}
              nestedScrollEnabled
            >
              {displayData.map((item, idx) => (
                <View key={idx} style={styles.legendItem}>
                  <View style={styles.legendItemLeft}>
                    <View style={[styles.bullet, { backgroundColor: item.color }]} />
                    <Text style={styles.legendLabel} numberOfLines={1}>
                      {item.name}
                    </Text>
                  </View>
                  <View style={styles.legendItemRight}>
                    <Text style={styles.legendCount}>{item.count}</Text>
                    <Text style={styles.legendPercentage}>{item.percentage}%</Text>
                  </View>
                </View>
              ))}
            </ScrollView>
          </>
        )}
      </View>
    </View>
  );
};