'use client';

import { useState } from 'react';
import { useMutation, useSuspenseQuery } from '@tanstack/react-query';
import { toast } from 'sonner';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
  DialogTrigger
} from '@/components/ui/dialog';
import { Input } from '@/components/ui/input';
import { approvalsQueryOptions, crmReferenceQueryOptions } from '../api/queries';
import { approveQuotationMutation, rejectQuotationMutation } from '../api/mutations';
import { BranchBadge, SectionCard, TimelineList } from './shared';
import { formatCurrency } from '../utils/format';

function DecisionDialog({
  label,
  description,
  isPending,
  onConfirm
}: {
  label: string;
  description: string;
  isPending: boolean;
  onConfirm: (comment: string) => void;
}) {
  const [comment, setComment] = useState('');

  return (
    <Dialog>
      <DialogTrigger asChild>
        <Button variant='outline' size='sm'>
          {label}
        </Button>
      </DialogTrigger>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>{label}</DialogTitle>
          <DialogDescription>{description}</DialogDescription>
        </DialogHeader>
        <Input value={comment} onChange={(event) => setComment(event.target.value)} placeholder='Comment' />
        <DialogFooter>
          <Button isLoading={isPending} onClick={() => onConfirm(comment)}>
            Confirm
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}

export function ApprovalsPage() {
  const { data } = useSuspenseQuery(approvalsQueryOptions({ page: 1, limit: 10 }));
  const { data: reference } = useSuspenseQuery(crmReferenceQueryOptions());
  const baseApproveMutation = approveQuotationMutation;
  const baseRejectMutation = rejectQuotationMutation;

  const approveMutation = useMutation({
    ...baseApproveMutation,
    onSuccess: async (...args) => {
      await baseApproveMutation.onSuccess?.(...args);
      toast.success('Approve mock สำเร็จ');
    }
  });

  const rejectMutation = useMutation({
    ...baseRejectMutation,
    onSuccess: async (...args) => {
      await baseRejectMutation.onSuccess?.(...args);
      toast.success('Reject mock สำเร็จ');
    }
  });

  return (
    <div className='grid gap-4 xl:grid-cols-12'>
      <SectionCard
        title='Pending Approval List'
        description='Sequential approval MVP'
        className='xl:col-span-7'
      >
        <div className='space-y-3'>
          {data.items.map((item) => {
            const branch = reference.branches.find((value) => value.id === item.branchId);
            return (
              <div key={item.id} className='rounded-xl border bg-muted/10 p-4'>
                <div className='flex flex-wrap items-start justify-between gap-3'>
                  <div>
                    <div className='flex items-center gap-2'>
                      <p className='font-semibold'>{item.quotationCode}</p>
                      {branch ? <BranchBadge branch={branch} /> : null}
                    </div>
                    <p className='text-muted-foreground mt-1 text-sm'>
                      {item.productType} / Submitter: {item.submitterName}
                    </p>
                    <p className='mt-2 text-sm font-medium'>
                      Level {item.approverLevel} / {formatCurrency(item.amount)}
                    </p>
                  </div>
                  <div className='flex gap-2'>
                    <DecisionDialog
                      label='Approve'
                      description='อนุมัติ quotation mock นี้'
                      isPending={approveMutation.isPending}
                      onConfirm={(comment) =>
                        approveMutation.mutate({ quotationId: item.quotationId, comment })
                      }
                    />
                    <DecisionDialog
                      label='Reject'
                      description='Reject quotation mock นี้'
                      isPending={rejectMutation.isPending}
                      onConfirm={(comment) =>
                        rejectMutation.mutate({ quotationId: item.quotationId, comment })
                      }
                    />
                  </div>
                </div>
              </div>
            );
          })}
        </div>
      </SectionCard>

      <SectionCard
        title='Approval Timeline'
        description='ภาพรวมเส้นทางการอนุมัติ'
        className='xl:col-span-5'
      >
        <TimelineList
          items={data.items.map((item) => ({
            id: item.id,
            title: `${item.quotationCode} / Level ${item.approverLevel}`,
            detail: `${item.submitterName} ส่งอนุมัติสำหรับ ${item.productType}`,
            timestamp: '2026-06-11'
          }))}
        />
      </SectionCard>
    </div>
  );
}