'use client';

import * as React from 'react';
import { CalendarCheck, Loader2, X } from 'lucide-react';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import { DatePicker } from '@/components/DatePicker';
import { ClockTimePicker } from '@/components/ClockTimePicker';
import { DurationPicker } from '@/components/DurationPicker';
import type { Appointment } from '@/lib/models/appointments';

interface ScheduleAppointmentDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  appointment: Appointment | null;
  scheduledDate: Date | undefined;
  setScheduledDate: (date: Date | undefined) => void;
  scheduledTime: string;
  setScheduledTime: (time: string) => void;
  scheduledDuration: number;
  setScheduledDuration: (duration: number) => void;
  onSchedule: () => Promise<void>;
  isScheduling: boolean;
  isDark?: boolean;
  title?: string;
  description?: string;
}

export function ScheduleAppointmentDialog({
  open,
  onOpenChange,
  appointment,
  scheduledDate,
  setScheduledDate,
  scheduledTime,
  setScheduledTime,
  scheduledDuration,
  setScheduledDuration,
  onSchedule,
  isScheduling,
  isDark = false,
  title,
  description,
}: ScheduleAppointmentDialogProps) {
  const formatDate = (date: Date) => {
    return date.toLocaleDateString("en-US", {
      weekday: "long",
      month: "long",
      day: "numeric",
      year: "numeric",
    });
  };

  const formatTime = (timeString: string) => {
    const [hours, minutes] = timeString.split(":").map(Number);
    const date = new Date();
    date.setHours(hours);
    date.setMinutes(minutes);
    return date.toLocaleTimeString("en-US", {
      hour: "numeric",
      minute: "2-digit",
      hour12: true,
    });
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className={`max-w-4xl max-h-[90vh] overflow-y-auto ${isDark ? "bg-gray-800 border-gray-700" : "bg-white border-gray-200"}`}>
        <DialogHeader className="pb-4">
          <DialogTitle className={`text-2xl font-semibold ${isDark ? "text-white" : "text-gray-900"}`}>
            {title || "Schedule Appointment"}
          </DialogTitle>
          <DialogDescription className={`text-base ${isDark ? "text-gray-400" : "text-gray-500"}`}>
            {description || (appointment
              ? `Set date and time for ${appointment.first_name} ${appointment.last_name}'s appointment`
              : "Set date and time for this appointment")}
          </DialogDescription>
        </DialogHeader>
        
        <div className="space-y-6 py-4">
          {/* Date Selection */}
          <div className="space-y-3">
            <label className={`text-sm font-semibold ${isDark ? "text-gray-300" : "text-gray-700"}`}>
              Select Date *
            </label>
            <div className={`p-4 rounded-xl border ${isDark ? "bg-gray-700/50 border-gray-600" : "bg-gray-50 border-gray-200"}`}>
              <DatePicker
                date={scheduledDate}
                setDate={setScheduledDate}
              />
            </div>
          </div>

          {/* Time Selection */}
          <div className="space-y-3 -mt-2">
            <div className={`p-4 rounded-xl border ${isDark ? "bg-gray-700/50 border-gray-600" : "bg-gray-50 border-gray-200"}`}>
              <ClockTimePicker
                time={scheduledTime}
                setTime={setScheduledTime}
                label="Select Time *"
                isDark={isDark}
              />
            </div>
          </div>

          {/* Duration Selection */}
          <div className="space-y-3">
            <div className={`p-4 rounded-xl border ${isDark ? "bg-gray-700/50 border-gray-600" : "bg-gray-50 border-gray-200"}`}>
              <DurationPicker
                duration={scheduledDuration}
                setDuration={setScheduledDuration}
                label="Duration"
                isDark={isDark}
              />
            </div>
          </div>

          {/* Preview */}
          {scheduledDate && scheduledTime && (
            <div className={`p-4 rounded-xl border ${isDark ? "bg-blue-500/10 border-blue-500/30" : "bg-blue-50 border-blue-200"}`}>
              <p className={`text-sm font-medium mb-2 ${isDark ? "text-blue-300" : "text-blue-700"}`}>
                Appointment Preview
              </p>
              <div className="space-y-1">
                <p className={`text-base font-semibold ${isDark ? "text-white" : "text-gray-900"}`}>
                  {formatDate(scheduledDate)}
                </p>
                <p className={`text-sm ${isDark ? "text-gray-300" : "text-gray-700"}`}>
                  {formatTime(scheduledTime)} • {scheduledDuration} minutes
                </p>
              </div>
            </div>
          )}
        </div>

        <DialogFooter className="gap-3 pt-4">
          <Button
            variant="outline"
            onClick={() => onOpenChange(false)}
            disabled={isScheduling}
            className={`h-12 px-6 ${isDark ? "border-gray-700 text-gray-300 hover:bg-gray-700" : ""}`}
          >
            Cancel
          </Button>
          <Button
            onClick={onSchedule}
            disabled={isScheduling || !scheduledDate || !scheduledTime}
            className="h-12 px-6 bg-blue-600 hover:bg-blue-700 text-white"
          >
            {isScheduling ? (
              <>
                <Loader2 className="w-5 h-5 mr-2 animate-spin" />
                Scheduling...
              </>
            ) : (
              <>
                <CalendarCheck className="w-5 h-5 mr-2" />
                Schedule Appointment
              </>
            )}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}