import React, { useState, useEffect } from 'react';
import { XIcon } from './icons/XIcon';
import apiService from '../services/apiService';
import { useUser } from '../contexts/UserContext';

interface CreateCampaignModalProps {
    isOpen: boolean;
    onClose: () => void;
    onAddCampaign: (campaignData: {
        name: string;
        workfrontId: string;
        clientLead: string;
        agencyLead: string;
        brandGuidelines: string;
    }) => void;
    brandGuidelines?: string[];
}

export const CreateCampaignModal: React.FC<CreateCampaignModalProps> = ({ isOpen, onClose, onAddCampaign, brandGuidelines: brandGuidelineOptions = [] }) => {
    const { user } = useUser();
    const [name, setName] = useState('');
    const [selectedBrandGuideline, setSelectedBrandGuideline] = useState('');
    const [workfrontId, setWorkfrontId] = useState('');
    const [clientLead, setClientLead] = useState('');
    const [agencyLead, setAgencyLead] = useState('');
    const [error, setError] = useState<string | null>(null);

    useEffect(() => {
        // Reset form when modal opens
        if (isOpen) {
            setName('');
            setSelectedBrandGuideline('');
            setWorkfrontId('');
            setClientLead('');
            setAgencyLead('');
            setError(null);
        }
    }, [isOpen]);

    const validateWorkfrontId = (id: string): boolean => {
        // Empty is valid (field is optional)
        if (id.length === 0) {
            setError(null);
            return true;
        }
        const isValid = /^#WF_\d+$/.test(id);
        if (!isValid) {
            setError("Workfront Campaign ID must be in the format '#WF_12345'");
        } else {
            setError(null);
        }
        return isValid;
    };

    const handleWorkfrontIdChange = (e: React.ChangeEvent<HTMLInputElement>) => {
        const newId = e.target.value;
        setWorkfrontId(newId);
        validateWorkfrontId(newId);
    };

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

        if (!name.trim() || !clientLead.trim() || !agencyLead.trim() || !selectedBrandGuideline.trim()) {
            return;
        }

        // Validate workfrontId format only if provided
        if (workfrontId.trim() && !/^#WF_\d+$/.test(workfrontId)) {
            setError("Workfront Campaign ID must be in the format '#WF_12345'");
            return;
        }

        setError(null);
        onAddCampaign({ name, workfrontId: workfrontId.trim(), clientLead, agencyLead, brandGuidelines: selectedBrandGuideline });
        onClose();
    };
    
    if (!isOpen) return null;

    const isFormInvalid = !name.trim() || !clientLead.trim() || !agencyLead.trim() || !selectedBrandGuideline.trim();

    return (
        <div
            className="fixed inset-0 bg-black bg-opacity-60 flex items-center justify-center z-50 transition-opacity duration-300"
            onClick={onClose}
            aria-modal="true"
            role="dialog"
        >
            <div
                className="bg-white rounded-[10px] shadow-xl p-6 sm:p-8 w-full max-w-lg transform transition-all border-2 border-oliver-azure"
                onClick={(e) => e.stopPropagation()}
            >
                <div className="flex justify-between items-center mb-6">
                    <h2 className="text-2xl font-bold text-oliver-black">Create New Campaign</h2>
                    <button onClick={onClose} className="p-1 rounded-full text-oliver-black/60 hover:bg-oliver-grey hover:text-oliver-black transition-colors">
                        <XIcon className="h-6 w-6" />
                    </button>
                </div>
                <form onSubmit={handleSubmit} noValidate>
                    <div className="space-y-4">
                        <div>
                            <label htmlFor="campaign-name" className="block text-sm font-medium text-oliver-black">Campaign Name</label>
                            <input
                                type="text"
                                id="campaign-name"
                                value={name}
                                onChange={(e) => setName(e.target.value)}
                                className="mt-1 block w-full p-2 border-2 border-oliver-azure rounded-[10px] shadow-sm focus:ring-oliver-azure focus:border-oliver-azure transition bg-white text-oliver-black"
                                required
                            />
                        </div>
                        <div>
                            <label htmlFor="brand-guidelines" className="block text-sm font-medium text-oliver-black">Brand Guidelines</label>
                            <select
                                id="brand-guidelines"
                                value={selectedBrandGuideline}
                                onChange={(e) => setSelectedBrandGuideline(e.target.value)}
                                className="mt-1 block w-full p-2 border-2 border-oliver-azure rounded-[10px] shadow-sm focus:ring-oliver-azure focus:border-oliver-azure transition bg-white text-oliver-black"
                                required
                            >
                                <option value="" disabled>Select brand guidelines</option>
                                {brandGuidelineOptions.map((brand) => (
                                    <option key={brand} value={brand}>{brand}</option>
                                ))}
                            </select>
                        </div>
                        <div>
                            <label htmlFor="workfront-id" className="block text-sm font-medium text-oliver-black">Workfront Campaign ID <span className="text-oliver-black/60 font-normal">(Optional)</span></label>
                            <input
                                type="text"
                                id="workfront-id"
                                value={workfrontId}
                                onChange={handleWorkfrontIdChange}
                                className={`mt-1 block w-full p-2 border-2 rounded-[10px] shadow-sm focus:ring-oliver-azure focus:border-oliver-azure transition bg-white text-oliver-black placeholder:text-oliver-black/60 ${error ? 'border-error focus:border-error focus:ring-error' : 'border-oliver-azure'}`}
                                placeholder="#WF_12345"
                                aria-invalid={!!error}
                                aria-describedby="workfront-id-error"
                            />
                            {error && <p id="workfront-id-error" className="mt-1 text-sm text-error">{error}</p>}
                        </div>
                        <div>
                            <label htmlFor="client-lead" className="block text-sm font-medium text-oliver-black">Client Lead</label>
                            <input
                                type="text"
                                id="client-lead"
                                value={clientLead}
                                onChange={(e) => setClientLead(e.target.value)}
                                className="mt-1 block w-full p-2 border-2 border-oliver-azure rounded-[10px] shadow-sm focus:ring-oliver-azure focus:border-oliver-azure transition bg-white text-oliver-black"
                                required
                            />
                        </div>
                        <div>
                            <label className="block text-sm font-medium text-oliver-black">Agency</label>
                            <input
                                type="text"
                                value={user?.agencyName ?? ''}
                                className="mt-1 block w-full p-2 border-2 border-grey-300 rounded-[10px] shadow-sm bg-oliver-grey text-oliver-black cursor-not-allowed"
                                disabled
                            />
                        </div>
                        <div>
                            <label htmlFor="agency-lead" className="block text-sm font-medium text-oliver-black">Agency Lead</label>
                            <input
                                type="text"
                                id="agency-lead"
                                value={agencyLead}
                                onChange={(e) => setAgencyLead(e.target.value)}
                                className="mt-1 block w-full p-2 border-2 border-oliver-azure rounded-[10px] shadow-sm focus:ring-oliver-azure focus:border-oliver-azure transition bg-white text-oliver-black"
                                required
                            />
                        </div>
                    </div>
                    <div className="mt-8 flex justify-end gap-3">
                        <button
                            type="button"
                            onClick={onClose}
                            className="border-2 border-oliver-azure text-oliver-azure font-semibold py-2 px-6 rounded-full hover:bg-oliver-azure hover:text-white transition-colors duration-300"
                        >
                            Cancel
                        </button>
                        <button
                            type="submit"
                            className="bg-oliver-azure text-white font-semibold py-2 px-6 rounded-full hover:bg-oliver-azure/90 transition-colors duration-300 disabled:bg-gray-400 disabled:cursor-not-allowed"
                            disabled={isFormInvalid || !!error}
                        >
                            Create Campaign
                        </button>
                    </div>
                </form>
            </div>
        </div>
    );
};