import moment from 'moment'
import type { CalendarEvent } from '../types'

interface TimeSlotModalProps {
    selectedDate: Date
    newTimeSlot: {
        startTime: string
        endTime: string
    }
    existingEvents: CalendarEvent[]
    onTimeSlotChange: (timeSlot: { startTime: string; endTime: string }) => void
    onAdd: () => void
    onCancel: () => void
    isAdding?: boolean
    validationError?: string | null
}

export function TimeSlotModal({
    selectedDate,
    newTimeSlot,
    existingEvents,
    onTimeSlotChange,
    onAdd,
    onCancel,
    isAdding = false,
    validationError = null
}: TimeSlotModalProps) {
    const getEventsForDate = (date: Date) => {
        return existingEvents.filter(event => {
            const eventDate = new Date(event.start)
            return eventDate.toDateString() === date.toDateString()
        })
    }

    // Validate time slot
    const isValid = () => {
        if (!newTimeSlot.startTime || !newTimeSlot.endTime) {
            return false
        }
        const [startHour, startMinute] = newTimeSlot.startTime.split(':').map(Number)
        const [endHour, endMinute] = newTimeSlot.endTime.split(':').map(Number)
        const startMinutes = startHour * 60 + startMinute
        const endMinutes = endHour * 60 + endMinute
        return startMinutes < endMinutes
    }

    return (
        <div className="fixed inset-0 flex items-center justify-center overflow-y-auto modal z-999999">
            <div
                className="fixed inset-0 h-full w-full bg-gray-400/50 backdrop-blur-[2px]"
                onClick={onCancel}
            />
            <div className="relative w-full rounded-2xl bg-white shadow-theme-xl dark:bg-gray-900 max-w-md mx-auto p-4" onClick={(e) => e.stopPropagation()}>
                {/* Close Button */}
                <button
                    onClick={onCancel}
                    className="absolute right-3 top-3 z-999 flex h-9.5 w-9.5 items-center justify-center rounded-full bg-gray-100 text-gray-400 transition-colors hover:bg-gray-200 hover:text-gray-700 dark:bg-gray-800 dark:text-gray-400 dark:hover:bg-gray-700 dark:hover:text-white sm:right-6 sm:top-6 sm:h-11 sm:w-11"
                >
                    <svg
                        width="24"
                        height="24"
                        viewBox="0 0 24 24"
                        fill="none"
                        xmlns="http://www.w3.org/2000/svg"
                    >
                        <path
                            fillRule="evenodd"
                            clipRule="evenodd"
                            d="M6.04289 16.5413C5.65237 16.9318 5.65237 17.565 6.04289 17.9555C6.43342 18.346 7.06658 18.346 7.45711 17.9555L11.9987 13.4139L16.5408 17.956C16.9313 18.3466 17.5645 18.3466 17.955 17.956C18.3455 17.5655 18.3455 16.9323 17.955 16.5418L13.4129 11.9997L17.955 7.4576C18.3455 7.06707 18.3455 6.43391 17.955 6.04338C17.5645 5.65286 16.9313 5.65286 16.5408 6.04338L11.9987 10.5855L7.45711 6.0439C7.06658 5.65338 6.43342 5.65338 6.04289 6.0439C5.65237 6.43442 5.65237 7.06759 6.04289 7.45811L10.5845 11.9997L6.04289 16.5413Z"
                            fill="currentColor"
                        />
                    </svg>
                </button>

                <h3 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">
                    Add Availability for {moment(selectedDate).format('MMMM D, YYYY')}
                </h3>

                <div className="space-y-4">
                    <div>
                        <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
                            Start Time
                        </label>
                        <input
                            type="time"
                            value={newTimeSlot.startTime}
                            onChange={(e) => onTimeSlotChange({ ...newTimeSlot, startTime: e.target.value })}
                            className={`w-full px-3 py-2 border rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white ${
                                validationError || !isValid() && newTimeSlot.startTime && newTimeSlot.endTime
                                    ? 'border-red-300 dark:border-red-600'
                                    : 'border-gray-300 dark:border-gray-600'
                            }`}
                            disabled={isAdding}
                        />
                    </div>

                    <div>
                        <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
                            End Time
                        </label>
                        <input
                            type="time"
                            value={newTimeSlot.endTime}
                            onChange={(e) => onTimeSlotChange({ ...newTimeSlot, endTime: e.target.value })}
                            className={`w-full px-3 py-2 border rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white ${
                                validationError || !isValid() && newTimeSlot.startTime && newTimeSlot.endTime
                                    ? 'border-red-300 dark:border-red-600'
                                    : 'border-gray-300 dark:border-gray-600'
                            }`}
                            disabled={isAdding}
                        />
                        {(validationError || (!isValid() && newTimeSlot.startTime && newTimeSlot.endTime)) && (
                            <p className="mt-1 text-sm text-red-600 dark:text-red-400">
                                {validationError || 'End time must be after start time'}
                            </p>
                        )}
                    </div>
                </div>

                {/* Show existing time slots for this date */}
                {getEventsForDate(selectedDate).length > 0 && (
                    <div className="mt-4">
                        <h4 className="text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
                            Existing time slots:
                        </h4>
                        <div className="space-y-1">
                            {getEventsForDate(selectedDate).map(event => (
                                <div key={event.id} className="text-sm text-gray-600 dark:text-gray-400">
                                    {moment(event.start).format('HH:mm')} - {moment(event.end).format('HH:mm')} ({event.title})
                                </div>
                            ))}
                        </div>
                    </div>
                )}

                <div className="flex justify-end space-x-3 mt-6">
                    <button
                        onClick={onCancel}
                        disabled={isAdding}
                        className="px-4 py-2 text-gray-600 dark:text-gray-400 hover:text-gray-800 dark:hover:text-gray-200 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
                    >
                        Cancel
                    </button>
                    <button
                        onClick={onAdd}
                        disabled={!isValid() || isAdding}
                        className="px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors disabled:opacity-50 disabled:cursor-not-allowed flex items-center"
                    >
                        {isAdding ? (
                            <>
                                <svg className="animate-spin -ml-1 mr-2 h-4 w-4 text-white" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                                    <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
                                    <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                                </svg>
                                Adding...
                            </>
                        ) : (
                            'Add Time Slot'
                        )}
                    </button>
                </div>
            </div>
        </div>
    )
}