import { AnimatePresence, motion } from 'motion/react';
import { useEffect, useRef } from 'react';

import type { CharacterChatModalState } from '../hooks/rpg-runtime-story';
import { getNineSliceStyle, UI_CHROME } from '../uiAssets';
import { PlatformActionButton } from './common/PlatformActionButton';
import { PlatformDarkOptionCard } from './common/PlatformDarkOptionCard';
import { PlatformEmptyState } from './common/PlatformEmptyState';
import { PlatformStatusMessage } from './common/PlatformStatusMessage';
import { PlatformSubpanel } from './common/PlatformSubpanel';
import { PlatformTextField } from './common/PlatformTextField';
import { PixelCloseButton } from './PixelCloseButton';

interface CharacterChatModalProps {
  modal: CharacterChatModalState | null;
  onClose: () => void;
  onDraftChange: (value: string) => void;
  onUseSuggestion: (value: string) => void;
  onRefreshSuggestions: () => void;
  onSendDraft: () => void;
}

export function CharacterChatModal({
  modal,
  onClose,
  onDraftChange,
  onUseSuggestion,
  onRefreshSuggestions,
  onSendDraft,
}: CharacterChatModalProps) {
  const scrollContainerRef = useRef<HTMLDivElement | null>(null);

  useEffect(() => {
    if (!modal || !scrollContainerRef.current) return;
    scrollContainerRef.current.scrollTop = scrollContainerRef.current.scrollHeight;
  }, [modal]);

  return (
    <AnimatePresence>
      {modal && (
        <motion.div
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          exit={{ opacity: 0 }}
          className="fixed inset-0 z-[85] flex items-center justify-center bg-black/76 p-3 backdrop-blur-sm sm:p-4"
          onClick={onClose}
        >
          <motion.div
            initial={{ opacity: 0, scale: 0.96, y: 8 }}
            animate={{ opacity: 1, scale: 1, y: 0 }}
            exit={{ opacity: 0, scale: 0.96, y: 8 }}
            transition={{ duration: 0.18, ease: 'easeOut' }}
            className="pixel-nine-slice pixel-modal-shell flex max-h-[min(92vh,56rem)] w-full max-w-3xl flex-col overflow-hidden shadow-[0_24px_80px_rgba(0,0,0,0.6)]"
            style={getNineSliceStyle(UI_CHROME.modalPanel)}
            onClick={event => event.stopPropagation()}
          >
            <div className="flex items-center justify-between border-b border-white/10 px-4 py-4 sm:px-5">
              <div className="min-w-0">
                <div className="text-[10px] tracking-[0.22em] text-sky-300/80">角色聊天</div>
                <div className="mt-1 truncate text-sm font-semibold text-white">{modal.target.character.name}</div>
                <div className="mt-1 text-[11px] text-zinc-500">
                  {modal.target.character.title} / {modal.target.roleLabel}
                </div>
              </div>
              <PixelCloseButton
                onClick={onClose}
                label="关闭角色聊天"
                placement="inline"
              />
            </div>

            <div className="grid min-h-0 flex-1 gap-4 overflow-y-auto p-4 sm:grid-cols-[minmax(0,0.88fr)_minmax(0,1.12fr)] sm:overflow-hidden sm:p-5">
              <div className="space-y-4 sm:max-h-full sm:overflow-y-auto sm:pr-1">
                <div className="pixel-nine-slice pixel-panel" style={getNineSliceStyle(UI_CHROME.panel)}>
                  <div className="mb-2 text-xs font-bold text-white">角色状态</div>
                  <div className="space-y-2 text-sm text-zinc-300">
                    <PlatformSubpanel
                      as="div"
                      surface="dark"
                      radius="xs"
                      padding="row"
                    >
                      生命值 {modal.target.hp} / {modal.target.maxHp}
                    </PlatformSubpanel>
                    <PlatformSubpanel
                      as="div"
                      surface="dark"
                      radius="xs"
                      padding="row"
                    >
                      内力 {modal.target.mana} / {modal.target.maxMana}
                    </PlatformSubpanel>
                    <PlatformSubpanel
                      as="div"
                      surface="dark"
                      radius="xs"
                      padding="row"
                      className="text-xs leading-relaxed text-zinc-400"
                    >
                      {modal.target.character.personality}
                    </PlatformSubpanel>
                  </div>
                </div>

                <div className="pixel-nine-slice pixel-panel" style={getNineSliceStyle(UI_CHROME.panel)}>
                  <div className="mb-2 text-xs font-bold text-white">聊天总结</div>
                  <PlatformSubpanel
                    as="div"
                    surface="dark"
                    radius="xs"
                    padding="md"
                    className="text-sm leading-relaxed text-zinc-300"
                  >
                    {modal.summary || '你们还没有形成新的私下聊天总结。'}
                  </PlatformSubpanel>
                </div>
              </div>

              <div className="flex min-h-0 flex-col">
                <div
                  ref={scrollContainerRef}
                  className="pixel-nine-slice pixel-panel min-h-[20rem] flex-1 space-y-3 overflow-y-auto pr-1 scrollbar-hide"
                  style={getNineSliceStyle(UI_CHROME.storyPanel)}
                >
                  {modal.messages.length > 0 ? (
                    modal.messages.map((message, index) => (
                      <div
                        key={`${message.speaker}-${index}-${message.text}`}
                        className={`flex ${message.speaker === 'player' ? 'justify-end' : 'justify-start'}`}
                      >
                        <div
                          className={`max-w-[88%] rounded-2xl border px-3 py-2 text-sm leading-relaxed ${
                            message.speaker === 'player'
                              ? 'rounded-br-none border-sky-400/20 bg-sky-500/10 text-sky-50'
                              : 'rounded-bl-none border-amber-400/20 bg-amber-500/10 text-amber-50'
                          }`}
                        >
                          <div className="mb-1 text-[10px] tracking-[0.18em] text-zinc-400">
                            {message.speaker === 'player' ? '你' : modal.target.character.name}
                          </div>
                          {message.text || (modal.isSending && message.speaker === 'character' ? '正在回复...' : '...')}
                        </div>
                      </div>
                    ))
                  ) : (
                    <PlatformEmptyState
                      surface="editorDark"
                      size="inline"
                      className="py-6 font-normal leading-relaxed text-zinc-500"
                    >
                      这里会保留你和该角色的私下聊天记录。输入框支持自由发挥，上方三条文本可以帮你快速起句。
                    </PlatformEmptyState>
                  )}
                </div>

                <div className="mt-4 space-y-3">
                  <div className="flex items-center justify-between gap-3">
                    <div className="text-xs font-bold text-white">帮你回复</div>
                    <PlatformActionButton
                      surface="editorDark"
                      tone="ghost"
                      size="xxs"
                      shape="pill"
                      onClick={onRefreshSuggestions}
                      disabled={modal.isLoadingSuggestions || modal.isSending}
                    >
                      {modal.isLoadingSuggestions ? '生成中...' : '换一组'}
                    </PlatformActionButton>
                  </div>

                  <div className="grid gap-2 sm:grid-cols-3">
                    {modal.suggestions.map((suggestion, index) => (
                      <PlatformDarkOptionCard
                        key={`${suggestion}-${index}`}
                        onClick={() => onUseSuggestion(suggestion)}
                        disabled={modal.isSending}
                        selected={false}
                        tone="sky"
                        radius="md"
                        padding="sm"
                        className="text-xs leading-relaxed"
                      >
                        {suggestion}
                      </PlatformDarkOptionCard>
                    ))}
                  </div>

                  {modal.error && (
                    <PlatformStatusMessage
                      tone="warning"
                      surface="editorDark"
                      size="xs"
                      className="leading-relaxed"
                    >
                      {modal.error}
                    </PlatformStatusMessage>
                  )}

                  <form
                    className="space-y-3"
                    onSubmit={event => {
                      event.preventDefault();
                      onSendDraft();
                    }}
                  >
                    <PlatformTextField
                      variant="textarea"
                      value={modal.draft}
                      onChange={event => onDraftChange(event.target.value)}
                      placeholder={`对${modal.target.character.name}说点什么...`}
                      disabled={modal.isSending}
                      rows={4}
                      surface="editorDark"
                      tone="sky"
                      size="md"
                      density="roomy"
                      className="rounded-2xl bg-black/25 leading-relaxed text-zinc-100 focus:border-sky-300/35"
                    />
                    <div className="flex justify-end">
                      <button
                        type="submit"
                        disabled={modal.isSending || !modal.draft.trim()}
                        className={`pixel-nine-slice pixel-pressable px-4 py-2 text-xs ${
                          modal.isSending || !modal.draft.trim() ? 'text-zinc-600' : 'text-white'
                        }`}
                        style={getNineSliceStyle(UI_CHROME.choiceButton, { paddingX: 14, paddingY: 8 })}
                      >
                        {modal.isSending ? '对话生成中...' : '发送'}
                      </button>
                    </div>
                  </form>
                </div>
              </div>
            </div>
          </motion.div>
        </motion.div>
      )}
    </AnimatePresence>
  );
}