import React, { useState, useEffect, useCallback, forwardRef, useImperativeHandle } from 'react';
import { View, StyleSheet, Alert } from 'react-native';
import { useTheme } from '~/features/theme/ThemeProvider';
import Text from '~/components/atoms/Text';
import Button from '~/components/atoms/Button';
import InviteUserModal from './InviteUserModal';
import InvitesList from './InvitesList';
import spaceService, { SpaceInvite } from '../services/spaceService';

interface SpaceInvitesManagerProps {
	spaceId: string;
	spaceName: string;
	isOwner: boolean;
}

export interface SpaceInvitesManagerHandle {
	openInviteModal: () => void;
}

/**
 * Component for managing space invites - allows sending invites and viewing pending invites
 */
const SpaceInvitesManager = forwardRef<SpaceInvitesManagerHandle, SpaceInvitesManagerProps>(
	({ spaceId, spaceName, isOwner }, ref) => {
		const { isDark } = useTheme();
		const [invites, setInvites] = useState<SpaceInvite[]>([]);
		const [isLoading, setIsLoading] = useState(false);
		const [showInviteModal, setShowInviteModal] = useState(false);

		// Expose the openInviteModal function to parent components
		useImperativeHandle(ref, () => ({
			openInviteModal: () => setShowInviteModal(true),
		}));

		// Fetch invites for the space
		const fetchInvites = useCallback(async () => {
			if (!spaceId) return;

			setIsLoading(true);
			try {
				const invitesData = await spaceService.getSpaceInvites(spaceId);
				setInvites(invitesData);
			} catch (error) {
				console.error('Failed to fetch invites:', error);
				const errorMessage = error instanceof Error ? error.message : 'Unknown error';
				Alert.alert('Error', `Failed to load invites: ${errorMessage}`);
			} finally {
				setIsLoading(false);
			}
		}, [spaceId]);

		// Load invites when component mounts
		useEffect(() => {
			fetchInvites();
		}, [fetchInvites]);

		// Handle sending an invitation
		const handleSendInvite = async (email: string, role: string) => {
			try {
				await spaceService.inviteUserToSpace(spaceId, email, role);
				// Refresh the invites list after sending an invitation
				fetchInvites();
			} catch (error) {
				console.error('Failed to send invite:', error);
				throw error;
			}
		};

		// Handle resending an invitation
		const handleResendInvite = async (invite: SpaceInvite) => {
			try {
				Alert.alert(
					'Resend Invitation',
					`Are you sure you want to resend the invitation to ${invite.email}?`,
					[
						{ text: 'Cancel', style: 'cancel' },
						{
							text: 'Resend',
							style: 'default',
							onPress: async () => {
								try {
									await spaceService.resendInvite(invite.id);
									Alert.alert('Success', `Invitation resent to ${invite.email}`);
									fetchInvites();
								} catch (error) {
									const errorMessage = error instanceof Error ? error.message : 'Unknown error';
									Alert.alert('Error', `Failed to resend invitation: ${errorMessage}`);
								}
							},
						},
					]
				);
			} catch (error) {
				console.error('Failed to resend invite:', error);
			}
		};

		// Handle canceling an invitation
		const handleCancelInvite = async (invite: SpaceInvite) => {
			try {
				Alert.alert(
					'Cancel Invitation',
					`Are you sure you want to cancel the invitation to ${invite.email}?`,
					[
						{ text: 'No', style: 'cancel' },
						{
							text: 'Yes, Cancel',
							style: 'destructive',
							onPress: async () => {
								try {
									await spaceService.cancelInvite(invite.id);
									Alert.alert('Success', `Invitation to ${invite.email} has been canceled`);
									fetchInvites();
								} catch (error) {
									const errorMessage = error instanceof Error ? error.message : 'Unknown error';
									Alert.alert('Error', `Failed to cancel invitation: ${errorMessage}`);
								}
							},
						},
					]
				);
			} catch (error) {
				console.error('Failed to cancel invite:', error);
			}
		};

		// Only show the invite button if the user is the owner of the space
		if (!isOwner) {
			return null;
		}

		return (
			<View style={styles.container}>
				<View style={styles.header}>
					<Text style={[styles.title, { color: isDark ? '#FFFFFF' : '#000000' }]}>
						Space Members & Invitations
					</Text>
					<Button
						title="Invite User"
						iconName="person-add-outline"
						onPress={() => setShowInviteModal(true)}
						style={styles.inviteButton}
					/>
				</View>

				<View style={styles.divider} />

				<Text
					style={[
						styles.sectionTitle,
						{ color: isDark ? 'rgba(255, 255, 255, 0.7)' : 'rgba(0, 0, 0, 0.7)' },
					]}
				>
					Pending Invitations
				</Text>

				<View style={styles.invitesContainer}>
					<InvitesList
						invites={invites.filter((inv) => inv.status.toLowerCase() === 'pending')}
						isLoading={isLoading}
						onRefresh={fetchInvites}
						onResendInvite={handleResendInvite}
						onCancelInvite={handleCancelInvite}
					/>
				</View>

				{/* Invite User Modal */}
				<InviteUserModal
					visible={showInviteModal}
					spaceId={spaceId}
					spaceName={spaceName}
					onClose={() => setShowInviteModal(false)}
					onSubmit={handleSendInvite}
				/>
			</View>
		);
	}
);

const styles = StyleSheet.create({
	container: {
		flex: 1,
		paddingVertical: 16,
	},
	header: {
		flexDirection: 'row',
		justifyContent: 'space-between',
		alignItems: 'center',
		marginBottom: 16,
		paddingHorizontal: 16,
	},
	title: {
		fontSize: 20,
		fontWeight: 'bold',
	},
	inviteButton: {
		minWidth: 130,
	},
	divider: {
		height: 1,
		backgroundColor: 'rgba(0, 0, 0, 0.1)',
		marginBottom: 16,
	},
	sectionTitle: {
		fontSize: 16,
		fontWeight: '600',
		marginBottom: 12,
		paddingHorizontal: 16,
	},
	invitesContainer: {
		flex: 1,
		paddingHorizontal: 16,
	},
});

export default SpaceInvitesManager;