import { Link } from 'react-router-dom';
import { BrandMark } from '../../../shared/components/BrandMark';
import { useViewport } from '../../../shared/hooks/useViewport';
import { ChatConversationList } from '../components/ChatConversationList';
import { ChatTransferPanel } from '../components/ChatTransferPanel';
import { ChatWindow } from '../components/ChatWindow';
import { useChat } from '../hooks/useChat';
import { quickReplies } from '../services/chatMocks';

export function ChatPage() {
  const { isWideDesktop, isDesktop, isTablet, isMobile } = useViewport();
  const {
    contacts,
    activeContact,
    activeContactId,
    setActiveContactId,
    messages,
    draft,
    setDraft,
    attachedFile,
    attachFile,
    removeAttachedFile,
    sendMessage,
    hydrateMessageMedia,
    isReplying,
    selectedArea,
    setSelectedArea,
    isTransferOpen,
    setIsTransferOpen,
    transferArea,
    setTransferArea,
    transferAreas,
    attendants,
    transferAttendant,
    setTransferAttendant,
    transferNote,
    setTransferNote,
    submitTransfer,
  } = useChat();

  const gridTemplateColumns = isMobile
    ? '1fr'
    : isWideDesktop
      ? 'minmax(260px, 320px) minmax(0, 1.6fr) minmax(280px, 320px)'
      : isDesktop || isTablet
        ? 'minmax(260px, 320px) minmax(0, 1fr)'
        : '1fr';

  return (
    <main style={{ minHeight: '100vh', padding: '1.5rem' }}>
      <section
        style={{
          width: 'min(1680px, calc(100vw - 3rem))',
          margin: '0 auto',
          background: 'var(--color-surface-strong)',
          borderRadius: '32px',
          boxShadow: 'var(--shadow-lg)',
          padding: '1.5rem',
          display: 'grid',
          gap: '1.25rem',
        }}
      >
        <header
          style={{
            display: 'grid',
            gridTemplateColumns: isMobile ? '1fr' : 'auto 1fr auto',
            gap: '1rem',
            alignItems: 'center',
          }}
        >
          <BrandMark />
          <div
            style={{
              justifySelf: isMobile ? 'stretch' : 'center',
              padding: '0.85rem 1rem',
              borderRadius: '18px',
              background: 'rgba(0, 49, 80, 0.06)',
              color: 'var(--color-primary)',
              fontWeight: 700,
              textAlign: 'center',
            }}
          >
            Atendimento em tempo real
          </div>
          <Link
            to="/home"
            style={{
              justifySelf: isMobile ? 'stretch' : 'end',
              borderRadius: '16px',
              padding: '0.85rem 1rem',
              background: 'var(--color-primary)',
              color: '#fff',
              fontWeight: 700,
              textAlign: 'center',
            }}
          >
            Voltar para home
          </Link>
        </header>

        <section
          style={{
            display: 'grid',
            gridTemplateColumns,
            gap: '1rem',
            alignItems: 'stretch',
          }}
        >
          <ChatConversationList
            contacts={contacts}
            activeContactId={activeContactId}
            onSelectContact={setActiveContactId}
            isMobile={isMobile}
          />

          <div style={{ display: 'grid', gap: '1rem', minWidth: 0, alignContent: 'start' }}>
            <ChatWindow
              contact={activeContact}
              messages={messages}
              selectedArea={selectedArea}
              setSelectedArea={setSelectedArea}
              draft={draft}
              setDraft={setDraft}
              attachedFile={attachedFile}
              onAttachFile={attachFile}
              onRemoveAttachedFile={removeAttachedFile}
              onLoadMedia={hydrateMessageMedia}
              onSend={sendMessage}
              onToggleTransfer={() => setIsTransferOpen((current) => !current)}
              isReplying={isReplying}
              isMobile={isMobile}
            />

            <div
              style={{
                display: 'grid',
                gridTemplateColumns: 'repeat(auto-fit, minmax(220px, 1fr))',
                gap: '0.75rem',
              }}
            >
              {quickReplies.map((reply) => (
                <button
                  key={reply}
                  type="button"
                  onClick={() => setDraft(reply)}
                  style={{
                    border: '1px solid var(--color-border)',
                    borderRadius: '18px',
                    padding: '0.85rem 1rem',
                    background: '#fff',
                    color: 'var(--color-primary)',
                    fontWeight: 600,
                    textAlign: 'left',
                  }}
                >
                  {reply}
                </button>
              ))}
            </div>
          </div>

          {isWideDesktop ? (
            <ChatTransferPanel
              isOpen={isTransferOpen}
              transferArea={transferArea}
              setTransferArea={setTransferArea}
              transferAreas={transferAreas}
              attendants={attendants}
              transferAttendant={transferAttendant}
              setTransferAttendant={setTransferAttendant}
              transferNote={transferNote}
              setTransferNote={setTransferNote}
              onSubmit={submitTransfer}
              onClose={() => setIsTransferOpen(false)}
            />
          ) : null}
        </section>

        {!isWideDesktop ? (
          <ChatTransferPanel
            isOpen={isTransferOpen}
            transferArea={transferArea}
            setTransferArea={setTransferArea}
            transferAreas={transferAreas}
            attendants={attendants}
            transferAttendant={transferAttendant}
            setTransferAttendant={setTransferAttendant}
            transferNote={transferNote}
            setTransferNote={setTransferNote}
            onSubmit={submitTransfer}
            onClose={() => setIsTransferOpen(false)}
          />
        ) : null}
      </section>
    </main>
  );
}