import { View, Text } from "react-native";
import { Feather } from "@expo/vector-icons";
import { ReactNode } from "react";
import { useThemeStore } from "../stores/ThemeStore";
import { CardBase } from "./CardBase";
import {
  isMultiDayEvent,
  formatDateWithWeekday,
  formatDateWithWeekdayShort,
  formatTime,
  formatRecurrenceRule,
} from "@calchat/shared";

type EventCardBaseProps = {
  className?: string;
  title: string;
  startTime: Date;
  endTime: Date;
  description?: string;
  recurrenceRule?: string;
  children?: ReactNode;
};

function formatDuration(start: Date, end: Date): string {
  const startDate = new Date(start);
  const endDate = new Date(end);
  const diffMs = endDate.getTime() - startDate.getTime();
  const diffMins = Math.round(diffMs / 60000);

  if (diffMins < 60) {
    return `${diffMins} min`;
  }

  const hours = Math.floor(diffMins / 60);
  const mins = diffMins % 60;

  if (mins === 0) {
    return hours === 1 ? "1 Std" : `${hours} Std`;
  }

  return `${hours} Std ${mins} min`;
}

export const EventCardBase = ({
  className,
  title,
  startTime,
  endTime,
  description,
  recurrenceRule,
  children,
}: EventCardBaseProps) => {
  const { theme } = useThemeStore();
  const multiDay = isMultiDayEvent(startTime, endTime);

  return (
    <CardBase title={title} className={className} borderWidth={2}>
      {/* Date */}
      <View className="flex-row items-center mb-1">
        <Feather
          name="calendar"
          size={16}
          color={theme.textPrimary}
          style={{ marginRight: 8 }}
        />
        {multiDay ? (
          <Text style={{ color: theme.textPrimary }}>
            {formatDateWithWeekdayShort(startTime)} →{" "}
            {formatDateWithWeekday(endTime)}
          </Text>
        ) : (
          <Text style={{ color: theme.textPrimary }}>
            {formatDateWithWeekday(startTime)}
          </Text>
        )}
      </View>

      {/* Time with duration */}
      <View className="flex-row items-center mb-1">
        <Feather
          name="clock"
          size={16}
          color={theme.textPrimary}
          style={{ marginRight: 8 }}
        />
        {multiDay ? (
          <Text style={{ color: theme.textPrimary }}>
            {formatTime(startTime)} → {formatTime(endTime)}
          </Text>
        ) : (
          <Text style={{ color: theme.textPrimary }}>
            {formatTime(startTime)} - {formatTime(endTime)} (
            {formatDuration(startTime, endTime)})
          </Text>
        )}
      </View>

      {/* Recurring indicator */}
      {recurrenceRule && (
        <View className="flex-row items-center mb-1">
          <Feather
            name="repeat"
            size={16}
            color={theme.textPrimary}
            style={{ marginRight: 8 }}
          />
          <Text style={{ color: theme.textPrimary }}>
            {formatRecurrenceRule(recurrenceRule)}
          </Text>
        </View>
      )}

      {/* Description */}
      {description && (
        <Text style={{ color: theme.textPrimary }} className="text-sm mt-1">
          {description}
        </Text>
      )}

      {/* Action buttons slot */}
      {children}
    </CardBase>
  );
};

export default EventCardBase;