'use client';

import { useState, useEffect } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import { AppDispatch, RootState } from '@/store/store';
import { addTeamMember, fetchUsers } from '@/store/slices/adminSlice';
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogFooter,
} from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { Label } from '@/components/ui/label';
import { toast } from 'sonner';

interface TeamMemberDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  teamId: string;
  existingMemberIds: string[];
}

export default function TeamMemberDialog({
  open,
  onOpenChange,
  teamId,
  existingMemberIds,
}: TeamMemberDialogProps) {
  const dispatch = useDispatch<AppDispatch>();
  const users = useSelector((state: RootState) => state.admin.users);
  const [selectedUserId, setSelectedUserId] = useState('');
  const [loading, setLoading] = useState(false);

  useEffect(() => {
    if (open && users.length === 0) {
      dispatch(fetchUsers());
    }
  }, [open, users.length, dispatch]);

  const availableUsers = users.filter(
    (u) => u.is_active && !existingMemberIds.includes(u.id)
  );

  const handleSubmit = async () => {
    if (!selectedUserId) return;

    setLoading(true);
    try {
      await dispatch(addTeamMember({ teamId, userId: selectedUserId })).unwrap();
      toast.success('Member added');
      setSelectedUserId('');
      onOpenChange(false);
    } catch (err) {
      toast.error(typeof err === 'string' ? err : 'Failed to add member');
    } finally {
      setLoading(false);
    }
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>Add Team Member</DialogTitle>
        </DialogHeader>
        <div className="space-y-4 py-4">
          <div className="space-y-2">
            <Label>Select User</Label>
            <Select value={selectedUserId} onValueChange={setSelectedUserId}>
              <SelectTrigger>
                <SelectValue placeholder="Choose a user..." />
              </SelectTrigger>
              <SelectContent>
                {availableUsers.map((u) => (
                  <SelectItem key={u.id} value={u.id}>
                    {u.display_name} ({u.email})
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>
            {availableUsers.length === 0 && (
              <p className="text-sm text-gray-500">No available users to add.</p>
            )}
          </div>
        </div>
        <DialogFooter>
          <Button variant="outline" onClick={() => onOpenChange(false)}>
            Cancel
          </Button>
          <Button onClick={handleSubmit} disabled={loading || !selectedUserId}>
            {loading ? 'Adding...' : 'Add Member'}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}