'use client';

import { useMemo, useState } from 'react';
import { useMutation } from '@tanstack/react-query';
import { toast } from 'sonner';
import { Icons } from '@/components/icons';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle
} from '@/components/ui/dialog';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue
} from '@/components/ui/select';
import { Textarea } from '@/components/ui/textarea';
import {
  shareCustomerContactMutation,
  unshareCustomerContactMutation
} from '../api/mutations';
import type { CustomerContactRecord, CustomerReferenceData } from '../api/types';
import { formatDateTime } from '@/lib/format';

export function ContactShareSheet({
  customerId,
  contact,
  referenceData,
  open,
  onOpenChange,
  canManage
}: {
  customerId: string;
  contact: CustomerContactRecord | null;
  referenceData: CustomerReferenceData;
  open: boolean;
  onOpenChange: (open: boolean) => void;
  canManage: boolean;
}) {
  const [sharedToUserId, setSharedToUserId] = useState('');
  const [remark, setRemark] = useState('');
  const existingSharedIds = useMemo(
    () => new Set(contact?.shares.map((item) => item.sharedToUserId) ?? []),
    [contact]
  );
  const candidates = useMemo(
    () => referenceData.crmUsers.filter((user) => !existingSharedIds.has(user.id)),
    [existingSharedIds, referenceData.crmUsers]
  );

  const shareMutation = useMutation({
    ...shareCustomerContactMutation,
    onSuccess: () => {
      toast.success('แชร์ contact เรียบร้อย');
      setSharedToUserId('');
      setRemark('');
    },
    onError: (error) =>
      toast.error(error instanceof Error ? error.message : 'ไม่สามารถแชร์ contact ได้')
  });
  const unshareMutation = useMutation({
    ...unshareCustomerContactMutation,
    onSuccess: () => {
      toast.success('ยกเลิกการแชร์เรียบร้อย');
    },
    onError: (error) =>
      toast.error(error instanceof Error ? error.message : 'ไม่สามารถยกเลิกการแชร์ได้')
  });

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>Shared With</DialogTitle>
          <DialogDescription>จัดการผู้ใช้ที่เข้าถึง contact นี้ได้</DialogDescription>
        </DialogHeader>
        <div className='space-y-4'>
          {!contact?.shares.length ? (
            <div className='text-muted-foreground text-sm'>ยังไม่มีการแชร์ contact นี้</div>
          ) : (
            <div className='space-y-2'>
              {contact.shares.map((share) => (
                <div
                  key={share.id}
                  className='flex items-start justify-between gap-3 rounded-lg border p-3'
                >
                  <div className='space-y-1 text-sm'>
                    <div className='font-medium'>{share.sharedToName ?? share.sharedToUserId}</div>
                    <div className='text-muted-foreground text-xs'>
                      {formatDateTime(share.sharedAt)} โดย {share.sharedByName ?? share.sharedByUserId}
                    </div>
                    {share.remark ? <div className='text-xs'>{share.remark}</div> : null}
                  </div>
                  {canManage ? (
                    <Button
                      variant='outline'
                      size='sm'
                      onClick={() =>
                        unshareMutation.mutate({
                          customerId,
                          contactId: contact.id,
                          shareId: share.id
                        })
                      }
                    >
                      <Icons.trash className='mr-2 h-4 w-4' />
                      Remove
                    </Button>
                  ) : null}
                </div>
              ))}
            </div>
          )}
          {canManage ? (
            <div className='space-y-3 border-t pt-4'>
              <Select value={sharedToUserId} onValueChange={setSharedToUserId}>
                <SelectTrigger aria-label='Shared user'>
                  <SelectValue placeholder='Select user' />
                </SelectTrigger>
                <SelectContent>
                  {candidates.map((user) => (
                    <SelectItem key={user.id} value={user.id}>
                      {user.name}
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
              <Textarea
                value={remark}
                onChange={(event) => setRemark(event.target.value)}
                placeholder='Remark'
              />
            </div>
          ) : null}
        </div>
        <DialogFooter>
          <Button variant='outline' onClick={() => onOpenChange(false)}>
            ปิด
          </Button>
          {canManage ? (
            <Button
              isLoading={shareMutation.isPending}
              disabled={!contact || !sharedToUserId}
              onClick={() => {
                if (!contact) {
                  return;
                }

                shareMutation.mutate({
                  customerId,
                  contactId: contact.id,
                  values: {
                    sharedToUserId,
                    remark
                  }
                });
              }}
            >
              <Icons.check className='mr-2 h-4 w-4' />
              Share
            </Button>
          ) : null}
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}