import React, { useEffect, useRef } from "react";
import {
  View,
  Text,
  StyleSheet,
  TouchableOpacity,
  Alert,
  Animated,
} from "react-native";
import { Ionicons } from "@expo/vector-icons";
import type { FitnessGoal } from "../services/fitnessGoals";
import { useTheme } from "../contexts/ThemeContext";
import { MinimalCard } from "./MinimalCard";
import { Badge } from "./Badge";
import { ProgressBar } from "./ProgressBar";
import { IconContainer } from "./IconContainer";

interface GoalProgressCardProps {
  goal: FitnessGoal;
  onPress?: () => void;
  onComplete?: () => void;
  onDelete?: () => void;
}

export function GoalProgressCard({
  goal,
  onPress,
  onComplete,
  onDelete,
}: GoalProgressCardProps) {
  const { colors, typography } = useTheme();
  const isCompleted = goal.status === "completed";
  const progress = (goal.progress || 0) / 100; // Convert to 0-1 scale
  const scaleAnim = useRef(new Animated.Value(1)).current;

  // Celebration animation when goal is completed
  useEffect(() => {
    if (isCompleted) {
      Animated.sequence([
        Animated.spring(scaleAnim, {
          toValue: 1.05,
          friction: 3,
          tension: 40,
          useNativeDriver: true,
        }),
        Animated.spring(scaleAnim, {
          toValue: 1,
          friction: 3,
          tension: 40,
          useNativeDriver: true,
        }),
      ]).start();
    }
  }, [isCompleted]);

  const handleComplete = () => {
    if (onComplete) {
      // Trigger celebration animation
      Animated.sequence([
        Animated.spring(scaleAnim, {
          toValue: 1.1,
          friction: 3,
          tension: 40,
          useNativeDriver: true,
        }),
        Animated.spring(scaleAnim, {
          toValue: 1,
          friction: 3,
          tension: 40,
          useNativeDriver: true,
        }),
      ]).start(() => {
        onComplete();
      });
    }
  };

  // Calculate days remaining
  const daysRemaining = goal.targetDate
    ? Math.ceil(
        (new Date(goal.targetDate).getTime() - Date.now()) /
          (1000 * 60 * 60 * 24),
      )
    : null;

  const getGoalTypeIcon = (type: string) => {
    switch (type) {
      case "weight_target":
        return "scale-outline";
      case "strength_milestone":
        return "barbell-outline";
      case "endurance_target":
        return "bicycle-outline";
      case "flexibility_goal":
        return "body-outline";
      case "habit_building":
        return "calendar-outline";
      default:
        return "flag-outline";
    }
  };

  const getPriorityColor = (priority: string) => {
    switch (priority) {
      case "high":
        return colors.danger;
      case "medium":
        return colors.warning;
      case "low":
        return colors.success;
      default:
        return colors.primary;
    }
  };

  const handleDelete = () => {
    Alert.alert("Delete Goal", "Are you sure you want to delete this goal?", [
      { text: "Cancel", style: "cancel" },
      { text: "Delete", style: "destructive", onPress: onDelete },
    ]);
  };

  return (
    <Animated.View style={{ transform: [{ scale: scaleAnim }] }}>
      <TouchableOpacity onPress={onPress} activeOpacity={0.85}>
        <MinimalCard
          variant="elevated"
          style={[
            styles.card,
            isCompleted && {
              backgroundColor: colors.surfaceElevated,
              opacity: 0.8,
            },
          ]}
          padding={20}
        >
          {/* Header */}
          <View style={styles.header}>
            <View style={styles.titleRow}>
              <IconContainer
                variant="colored"
                backgroundColor={
                  isCompleted ? colors.success : getPriorityColor(goal.priority)
                }
              >
                <Ionicons
                  name={getGoalTypeIcon(goal.goalType) as any}
                  size={20}
                  color={colors.white}
                />
              </IconContainer>

              <View style={styles.titleContainer}>
                <Text
                  style={[
                    typography.h3,
                    { color: colors.textPrimary },
                    isCompleted && {
                      color: colors.textSecondary,
                      textDecorationLine: "line-through",
                    },
                  ]}
                >
                  {goal.title}
                </Text>
                {goal.description && (
                  <Text
                    style={[
                      typography.caption,
                      { color: colors.textTertiary, marginTop: 2 },
                    ]}
                    numberOfLines={2}
                  >
                    {goal.description}
                  </Text>
                )}
              </View>
            </View>

            {/* Action Buttons */}
            <View style={styles.actions}>
              {!isCompleted && onComplete && (
                <TouchableOpacity
                  onPress={handleComplete}
                  style={styles.actionButton}
                >
                  <Ionicons
                    name="checkmark-circle-outline"
                    size={24}
                    color={colors.success}
                  />
                </TouchableOpacity>
              )}
              {onDelete && (
                <TouchableOpacity
                  onPress={handleDelete}
                  style={styles.actionButton}
                >
                  <Ionicons
                    name="trash-outline"
                    size={22}
                    color={colors.danger}
                  />
                </TouchableOpacity>
              )}
            </View>
          </View>

          {/* Progress Section */}
          {goal.targetValue && (
            <View style={styles.progressSection}>
              <View style={styles.progressInfo}>
                <Text
                  style={[typography.caption, { color: colors.textSecondary }]}
                >
                  {goal.currentValue || 0} / {goal.targetValue}{" "}
                  {goal.unit || ""}
                </Text>
                <Text
                  style={[
                    typography.bodyEmphasis,
                    {
                      color: isCompleted ? colors.success : colors.primary,
                    },
                  ]}
                >
                  {(progress * 100).toFixed(0)}%
                </Text>
              </View>

              <ProgressBar
                progress={progress}
                color={
                  isCompleted ? colors.success : getPriorityColor(goal.priority)
                }
              />
            </View>
          )}

          {/* Footer */}
          <View style={styles.footer}>
            {isCompleted ? (
              <Badge variant="success" label="COMPLETED" />
            ) : (
              <View>
                {goal.priority === "high" && (
                  <Badge variant="danger" label={goal.priority.toUpperCase()} />
                )}
                {goal.priority === "medium" && (
                  <Badge
                    variant="warning"
                    label={goal.priority.toUpperCase()}
                  />
                )}
                {goal.priority === "low" && (
                  <Badge
                    variant="success"
                    label={goal.priority.toUpperCase()}
                  />
                )}
              </View>
            )}

            {daysRemaining !== null && !isCompleted && (
              <Text
                style={[
                  typography.caption,
                  {
                    color:
                      daysRemaining < 0 ? colors.danger : colors.textTertiary,
                  },
                ]}
              >
                {daysRemaining < 0
                  ? `${Math.abs(daysRemaining)} days overdue`
                  : `${daysRemaining} days remaining`}
              </Text>
            )}

            {isCompleted && goal.completedDate && (
              <Text style={[typography.caption, { color: colors.success }]}>
                Completed {new Date(goal.completedDate).toLocaleDateString()}
              </Text>
            )}
          </View>
        </MinimalCard>
      </TouchableOpacity>
    </Animated.View>
  );
}

const styles = StyleSheet.create({
  card: {
    marginBottom: 16,
    borderRadius: 20,
  },
  header: {
    flexDirection: "row",
    justifyContent: "space-between",
    alignItems: "flex-start",
    marginBottom: 16,
  },
  titleRow: {
    flexDirection: "row",
    alignItems: "flex-start",
    flex: 1,
  },
  titleContainer: {
    flex: 1,
    marginLeft: 14,
  },
  actions: {
    flexDirection: "row",
    gap: 12,
  },
  actionButton: {
    padding: 6,
  },
  progressSection: {
    marginBottom: 16,
  },
  progressInfo: {
    flexDirection: "row",
    justifyContent: "space-between",
    alignItems: "center",
    marginBottom: 10,
  },
  footer: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "space-between",
  },
});