import React, { useState, useEffect } from 'react';
import { X, Trash2 } from 'lucide-react';
import { DevPipelineItem, DevPipelineStatus, Employee } from '../../types';
import { backendApi } from '../../services/apiClient';

interface Props {
    item: DevPipelineItem | null;
    onClose: () => void;
    onSuccess: () => void;
}

const STAGES: { id: DevPipelineStatus; label: string }[] = [
    { id: 'incoming', label: 'Входящие' },
    { id: 'analysis', label: 'Анализ' },
    { id: 'agenda_approval', label: 'Согласование повестки' },
    { id: 'in_person', label: 'Очная часть' },
    { id: 'absentee', label: 'Заочная часть' },
    { id: 'protocol_formation', label: 'Формирование протокола' },
    { id: 'protocol_to_gzhi', label: 'Отправка протокола в ГЖИ' },
    { id: 'gzhi_order', label: 'Приказ ГЖИ' },
    { id: 'success', label: 'Успех' },
    { id: 'failure', label: 'Провал' },
];

export const EditPipelineObjectModal: React.FC<Props> = ({ item, onClose, onSuccess }) => {
    const [formData, setFormData] = useState<Partial<DevPipelineItem>>({});
    const [employees, setEmployees] = useState<Employee[]>([]);
    const [loading, setLoading] = useState(false);
    const [loadingEmployees, setLoadingEmployees] = useState(true);
    const [deleting, setDeleting] = useState(false);

    useEffect(() => {
        if (item) {
            setFormData({
                address: item.address,
                type: item.type,
                floors: item.floors,
                area: item.area,
                apartments: item.apartments,
                status: item.status,
                probability: item.probability,
                expectedRevenue: item.expectedRevenue,
                manager: item.manager,
                notes: item.notes ?? '',
            });
            fetchEmployees();
        }
    }, [item]);

    const fetchEmployees = async () => {
        try {
            setLoadingEmployees(true);
            const data = await backendApi.getEmployees();
            setEmployees(data.filter(emp => emp.status === 'active'));
        } catch (error) {
            console.error('Error fetching employees:', error);
            setEmployees([]);
        } finally {
            setLoadingEmployees(false);
        }
    };

    if (!item) return null;

    const handleSubmit = async (e: React.FormEvent) => {
        e.preventDefault();
        if (!formData.address || !formData.manager) {
            alert('Заполните обязательные поля: адрес и менеджер');
            return;
        }
        if ((formData.area ?? 0) <= 0 || (formData.apartments ?? 0) <= 0 || (formData.floors ?? 0) <= 0) {
            alert('Площадь, количество квартир и этажность должны быть больше 0');
            return;
        }
        try {
            setLoading(true);
            await backendApi.updateDevelopmentPipeline(item.id, {
                address: formData.address,
                type: formData.type,
                floors: formData.floors,
                area: formData.area,
                apartments: formData.apartments,
                status: formData.status,
                probability: formData.probability,
                expectedRevenue: formData.expectedRevenue,
                manager: formData.manager,
                notes: formData.notes ?? undefined,
            });
            window.dispatchEvent(new CustomEvent('mkd-pipeline-changed'));
            onSuccess();
            onClose();
        } catch (error: unknown) {
            const err = error as { message?: string; error?: string };
            alert(err?.message || err?.error || 'Ошибка при сохранении');
        } finally {
            setLoading(false);
        }
    };

    const handleDelete = async () => {
        if (!confirm('Удалить объект из воронки?')) return;
        try {
            setDeleting(true);
            await backendApi.deleteDevelopmentPipeline(item.id);
            window.dispatchEvent(new CustomEvent('mkd-pipeline-changed'));
            onSuccess();
            onClose();
        } catch (error: unknown) {
            const err = error as { message?: string; error?: string };
            alert(err?.message || err?.error || 'Ошибка при удалении');
        } finally {
            setDeleting(false);
        }
    };

    return (
        <div
            className="fixed inset-0 z-[100] flex items-center justify-center p-4 bg-slate-900/80 backdrop-blur-md animate-fade-in"
            onClick={onClose}
        >
            <div
                className="bg-white rounded-2xl w-full max-w-2xl shadow-2xl animate-slide-up max-h-[90vh] overflow-y-auto"
                onClick={(e) => e.stopPropagation()}
            >
                <div className="sticky top-0 bg-white border-b border-slate-200 px-6 py-4 flex justify-between items-center">
                    <h3 className="text-lg font-black text-slate-800">Карточка объекта</h3>
                    <div className="flex items-center gap-2">
                        <button
                            type="button"
                            onClick={handleDelete}
                            disabled={deleting}
                            className="p-2 text-red-500 hover:bg-red-50 rounded-xl transition-colors disabled:opacity-50"
                            title="Удалить"
                        >
                            <Trash2 className="w-5 h-5" />
                        </button>
                        <button type="button" onClick={onClose} className="p-2 hover:bg-slate-100 rounded-xl transition-colors">
                            <X className="w-5 h-5 text-slate-400" />
                        </button>
                    </div>
                </div>

                <form onSubmit={handleSubmit} className="p-6 space-y-6">
                    <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                        <div className="md:col-span-2">
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Адрес *</label>
                            <input
                                type="text"
                                required
                                value={formData.address ?? ''}
                                onChange={(e) => setFormData({ ...formData, address: e.target.value })}
                                placeholder="ул. Примерная, д. 1"
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            />
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Тип объекта</label>
                            <select
                                value={formData.type ?? 'old'}
                                onChange={(e) => setFormData({ ...formData, type: e.target.value as 'old' | 'new' })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            >
                                <option value="old">Вторичка</option>
                                <option value="new">Новостройка</option>
                            </select>
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Этажность</label>
                            <input
                                type="number"
                                required
                                min={1}
                                value={formData.floors ?? 0}
                                onChange={(e) => setFormData({ ...formData, floors: parseInt(e.target.value, 10) || 0 })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            />
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Площадь (м²)</label>
                            <input
                                type="number"
                                required
                                min={0}
                                step={0.01}
                                value={formData.area ?? 0}
                                onChange={(e) => setFormData({ ...formData, area: parseFloat(e.target.value) || 0 })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            />
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Количество квартир</label>
                            <input
                                type="number"
                                required
                                min={0}
                                value={formData.apartments ?? 0}
                                onChange={(e) => setFormData({ ...formData, apartments: parseInt(e.target.value, 10) || 0 })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            />
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Этап воронки</label>
                            <select
                                value={formData.status ?? 'incoming'}
                                onChange={(e) => setFormData({ ...formData, status: e.target.value as DevPipelineStatus })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            >
                                {STAGES.map((s) => (
                                    <option key={s.id} value={s.id}>{s.label}</option>
                                ))}
                            </select>
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Вероятность (%)</label>
                            <input
                                type="number"
                                required
                                min={0}
                                max={100}
                                value={formData.probability ?? 0}
                                onChange={(e) => setFormData({ ...formData, probability: parseInt(e.target.value, 10) || 0 })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            />
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Ожидаемая выручка (₽)</label>
                            <input
                                type="number"
                                required
                                min={0}
                                value={formData.expectedRevenue ?? 0}
                                onChange={(e) => setFormData({ ...formData, expectedRevenue: parseFloat(e.target.value) || 0 })}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                            />
                        </div>
                        <div>
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Менеджер *</label>
                            {loadingEmployees ? (
                                <div className="w-full p-2.5 rounded-xl border border-slate-200 text-sm text-slate-400">Загрузка...</div>
                            ) : (
                                <select
                                    required
                                    value={formData.manager ?? ''}
                                    onChange={(e) => setFormData({ ...formData, manager: e.target.value })}
                                    className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none"
                                >
                                    <option value="">Выберите менеджера</option>
                                    {employees.map((emp) => (
                                        <option key={emp.id} value={emp.name}>
                                            {emp.name} {emp.position ? `(${emp.position})` : ''}
                                        </option>
                                    ))}
                                </select>
                            )}
                        </div>
                        <div className="md:col-span-2">
                            <label className="text-[10px] text-slate-500 font-bold uppercase block mb-2">Примечания</label>
                            <textarea
                                value={formData.notes ?? ''}
                                onChange={(e) => setFormData({ ...formData, notes: e.target.value })}
                                rows={3}
                                className="w-full p-2.5 rounded-xl border border-slate-200 text-sm focus:ring-2 focus:ring-primary-500 outline-none resize-none"
                            />
                        </div>
                    </div>

                    <div className="flex gap-3 justify-end pt-4 border-t border-slate-200">
                        <button
                            type="button"
                            onClick={onClose}
                            className="px-6 py-2.5 bg-slate-100 text-slate-700 rounded-xl text-sm font-bold hover:bg-slate-200 transition-colors"
                        >
                            Отмена
                        </button>
                        <button
                            type="submit"
                            disabled={loading}
                            className="px-6 py-2.5 bg-primary-600 text-white rounded-xl text-sm font-bold hover:bg-primary-700 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
                        >
                            {loading ? 'Сохранение...' : 'Сохранить'}
                        </button>
                    </div>
                </form>
            </div>
        </div>
    );
};