'use client';

import { useState } from 'react';
import { useParams, useRouter } from 'next/navigation';
import TeamDetailTemplate from '@/templates/TeamDetailTemplate';
import { useEffectiveDriverId } from '@/hooks/useEffectiveDriverId';

// Shared state components
import { StateContainer } from '@/components/shared/state/StateContainer';
import { useTeamDetails } from '@/hooks/team/useTeamDetails';
import { useTeamMembers } from '@/hooks/team/useTeamMembers';
import { useInject } from '@/lib/di/hooks/useInject';
import { TEAM_SERVICE_TOKEN } from '@/lib/di/tokens';
import { Users } from 'lucide-react';

type Tab = 'overview' | 'roster' | 'standings' | 'admin';

export default function TeamDetailInteractive() {
    const params = useParams();
    const teamId = params.id as string;
    const router = useRouter();
    const currentDriverId = useEffectiveDriverId();
    const teamService = useInject(TEAM_SERVICE_TOKEN);

    const [activeTab, setActiveTab] = useState<Tab>('overview');

    // Fetch team details using DI + React-Query
    const { data: teamDetails, isLoading: teamLoading, error: teamError, retry: teamRetry } = useTeamDetails(teamId, currentDriverId);

    // Fetch team members using DI + React-Query
    const { data: memberships, isLoading: membersLoading, error: membersError, retry: membersRetry } = useTeamMembers(
        teamId,
        currentDriverId,
        teamDetails?.ownerId || ''
    );

    const isLoading = teamLoading || membersLoading;
    const error = teamError || membersError;
    const retry = async () => {
        await teamRetry();
        await membersRetry();
    };

    // Determine admin status
    const isAdmin = teamDetails?.isOwner ||
        (memberships || []).some((m: any) => m.driverId === currentDriverId && (m.role === 'manager' || m.role === 'owner'));

    const handleUpdate = () => {
        retry();
    };

    const handleRemoveMember = async (driverId: string) => {
        if (!confirm('Are you sure you want to remove this member?')) {
            return;
        }

        try {
            const performer = await teamService.getMembership(teamId, currentDriverId);
            if (!performer || (performer.role !== 'owner' && performer.role !== 'manager')) {
                throw new Error('Only owners or admins can remove members');
            }

            const membership = await teamService.getMembership(teamId, driverId);
            if (!membership) {
                throw new Error('Member not found');
            }
            if (membership.role === 'owner') {
                throw new Error('Cannot remove the team owner');
            }

            await teamService.removeMembership(teamId, driverId);
            handleUpdate();
        } catch (error) {
            alert(error instanceof Error ? error.message : 'Failed to remove member');
        }
    };

    const handleChangeRole = async (driverId: string, newRole: 'owner' | 'admin' | 'member') => {
        try {
            const performer = await teamService.getMembership(teamId, currentDriverId);
            if (!performer || (performer.role !== 'owner' && performer.role !== 'manager')) {
                throw new Error('Only owners or admins can update roles');
            }

            const membership = await teamService.getMembership(teamId, driverId);
            if (!membership) {
                throw new Error('Member not found');
            }
            if (membership.role === 'owner') {
                throw new Error('Cannot change the owner role');
            }

            // Convert 'admin' to 'manager' for the service
            const serviceRole = newRole === 'admin' ? 'manager' : newRole;
            await teamService.updateMembership(teamId, driverId, serviceRole);
            handleUpdate();
        } catch (error) {
            alert(error instanceof Error ? error.message : 'Failed to change role');
        }
    };

    const handleGoBack = () => {
        window.history.back();
    };

    return (
        <StateContainer
            data={teamDetails}
            isLoading={isLoading}
            error={error}
            retry={retry}
            config={{
                loading: { variant: 'skeleton', message: 'Loading team details...' },
                error: { variant: 'full-screen' },
                empty: {
                    icon: Users,
                    title: 'Team not found',
                    description: 'The team may have been deleted or you may not have access',
                    action: { label: 'Back to Teams', onClick: () => router.push('/teams') }
                }
            }}
        >
            {(teamData) => (
                <TeamDetailTemplate
                    team={teamData!}
                    memberships={memberships || []}
                    activeTab={activeTab}
                    loading={isLoading}
                    isAdmin={isAdmin}
                    onTabChange={setActiveTab}
                    onUpdate={handleUpdate}
                    onRemoveMember={handleRemoveMember}
                    onChangeRole={handleChangeRole}
                    onGoBack={handleGoBack}
                />
            )}
        </StateContainer>
    );
 }