'use client';

import { useState } from 'react';
import { useRouter } from 'next/navigation';
import Button from '@/components/ui/Button';
import Input from '@/components/ui/Input';
import { getCreateTeamUseCase } from '@/lib/di-container';
import { useEffectiveDriverId } from '@/lib/currentDriver';

interface CreateTeamFormProps {
  onCancel?: () => void;
  onSuccess?: (teamId: string) => void;
}

export default function CreateTeamForm({ onCancel, onSuccess }: CreateTeamFormProps) {
  const router = useRouter();
  const [formData, setFormData] = useState({
    name: '',
    tag: '',
    description: '',
  });
  const [errors, setErrors] = useState<Record<string, string>>({});
  const [submitting, setSubmitting] = useState(false);
  const currentDriverId = useEffectiveDriverId();

  const validateForm = () => {
    const newErrors: Record<string, string> = {};

    if (!formData.name.trim()) {
      newErrors.name = 'Team name is required';
    } else if (formData.name.length < 3) {
      newErrors.name = 'Team name must be at least 3 characters';
    }

    if (!formData.tag.trim()) {
      newErrors.tag = 'Team tag is required';
    } else if (formData.tag.length > 4) {
      newErrors.tag = 'Team tag must be 4 characters or less';
    }

    if (!formData.description.trim()) {
      newErrors.description = 'Description is required';
    } else if (formData.description.length < 10) {
      newErrors.description = 'Description must be at least 10 characters';
    }

    setErrors(newErrors);
    return Object.keys(newErrors).length === 0;
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();

    if (!validateForm()) {
      return;
    }

    setSubmitting(true);

    try {
      const useCase = getCreateTeamUseCase();
      const result = await useCase.execute({
        name: formData.name,
        tag: formData.tag.toUpperCase(),
        description: formData.description,
        ownerId: currentDriverId,
        leagues: [],
      });

      const teamId = result.team.id;

      if (onSuccess) {
        onSuccess(teamId);
      } else {
        router.push(`/teams/${teamId}`);
      }
    } catch (error) {
      alert(error instanceof Error ? error.message : 'Failed to create team');
      setSubmitting(false);
    }
  };

  return (
    <form onSubmit={handleSubmit} className="space-y-6">
      <div>
        <label className="block text-sm font-medium text-gray-400 mb-2">
          Team Name *
        </label>
        <Input
          type="text"
          value={formData.name}
          onChange={(e) => setFormData({ ...formData, name: e.target.value })}
          placeholder="Enter team name..."
          disabled={submitting}
        />
        {errors.name && (
          <p className="text-danger-red text-xs mt-1">{errors.name}</p>
        )}
      </div>

      <div>
        <label className="block text-sm font-medium text-gray-400 mb-2">
          Team Tag *
        </label>
        <Input
          type="text"
          value={formData.tag}
          onChange={(e) => setFormData({ ...formData, tag: e.target.value.toUpperCase() })}
          placeholder="e.g., APEX"
          maxLength={4}
          disabled={submitting}
        />
        <p className="text-xs text-gray-500 mt-1">Max 4 characters</p>
        {errors.tag && (
          <p className="text-danger-red text-xs mt-1">{errors.tag}</p>
        )}
      </div>

      <div>
        <label className="block text-sm font-medium text-gray-400 mb-2">
          Description *
        </label>
        <textarea
          className="w-full px-3 py-3 bg-iron-gray border-0 rounded-md text-white ring-1 ring-inset ring-charcoal-outline focus:ring-2 focus:ring-primary-blue transition-all duration-150 text-sm resize-none"
          rows={4}
          value={formData.description}
          onChange={(e) => setFormData({ ...formData, description: e.target.value })}
          placeholder="Describe your team's goals and racing style..."
          disabled={submitting}
        />
        {errors.description && (
          <p className="text-danger-red text-xs mt-1">{errors.description}</p>
        )}
      </div>

      <div className="bg-deep-graphite border border-charcoal-outline rounded-lg p-4">
        <div className="flex items-start gap-3">
          <div className="text-2xl">ℹ️</div>
          <div className="flex-1">
            <h4 className="text-white font-medium mb-1">About Team Creation</h4>
            <ul className="text-sm text-gray-400 space-y-1">
              <li>• You will be assigned as the team owner</li>
              <li>• You can invite other drivers to join your team</li>
              <li>• Team standings are calculated across leagues</li>
              <li>• This is alpha data - it resets on page reload</li>
            </ul>
          </div>
        </div>
      </div>

      <div className="flex gap-3">
        <Button
          type="submit"
          variant="primary"
          disabled={submitting}
          className="flex-1"
        >
          {submitting ? 'Creating Team...' : 'Create Team'}
        </Button>
        {onCancel && (
          <Button
            type="button"
            variant="secondary"
            onClick={onCancel}
            disabled={submitting}
          >
            Cancel
          </Button>
        )}
      </div>
    </form>
  );
}