import { useState } from 'react';
import { useNavigate } from 'react-router-dom';
import moduleCanvasImage from '@/assets/module-canvas-neon.jpg';
import moduleGameImage from '@/assets/module-game.jpg';
import moduleLearningImage from '@/assets/module-learning.jpg';
import moduleRobotImage from '@/assets/module-robot.jpg';
import logoWordmarkSource from '@/assets/makelore-wordmark-source.png';
import { UserProfileDialog } from '@/components/profile/UserProfileDialog';
import { useCurrentUserProfile } from '@/hooks/use-current-user-profile';
import { aiModules, isAiModuleAllowed, type AiModuleId } from '@/lib/ai-modules';
import { getAuthUserDisplayName } from '@/lib/auth-user-display';
import { cn } from '@/lib/utils';
import { useAuthStore } from '@/stores/auth';
import { getUserProfileDisplayName } from '@/stores/user-profile';

const moduleSelectionContent: Record<AiModuleId, { label: string; image: string; imageAlt: string }> = {
  programming: { label: 'Code 编程', image: moduleGameImage, imageAlt: '游戏创作工作台' },
  painting: { label: 'Canvas 设计', image: moduleCanvasImage, imageAlt: '数位板设计创作' },
  learning: { label: 'Learning 学习', image: moduleLearningImage, imageAlt: '数学科技宇宙' },
  robot: { label: 'Robot 机器', image: moduleRobotImage, imageAlt: '青少年管理机器人硬件与设备绑定' },
};

export function ModuleSelection({ authRequired = true }: { authRequired?: boolean }) {
  const navigate = useNavigate();
  const authUser = useAuthStore((state) => state.user);
  const moduleAccess = useAuthStore((state) => state.moduleAccess);
  const authenticated = useAuthStore((state) => state.isAuthenticated());
  const {
    userProfile,
    profileRequired,
    profileSyncError,
  } = useCurrentUserProfile(authRequired);
  const [profileDialogOpen, setProfileDialogOpen] = useState(false);
  const userDisplayName = getUserProfileDisplayName(userProfile) || getAuthUserDisplayName(authUser);

  const [dismissedSyncError, setDismissedSyncError] = useState<string | null>(null);
  const profileDialogShouldBeOpen = profileDialogOpen
    || profileRequired
    || Boolean(profileSyncError && dismissedSyncError !== profileSyncError);

  const openModule = (route: string | null, enabled: boolean) => {
    if (!route || !enabled) return;
    if (authRequired && !authenticated) {
      navigate('/login');
      return;
    }
    navigate(route);
  };

  return (
    <main data-testid="ai-module-selection-page" className="relative min-h-[100dvh] overflow-auto bg-background px-4 py-6 text-foreground sm:px-8 sm:py-10">
      <div className="mx-auto flex min-h-[calc(100dvh-3rem)] max-w-6xl flex-col">
        <header
          data-testid="module-selection-drag-region"
          className="drag-region absolute inset-x-0 top-0 flex h-16 items-start justify-end px-6 pt-6 sm:px-8 sm:pt-8"
        >
          <img src={logoWordmarkSource} alt="Makelore" className="h-8 w-40 object-cover object-center" draggable="false" />
        </header>

        <div className="grid flex-1 items-center gap-8 py-12 lg:grid-cols-[minmax(0,1fr)_minmax(0,1.35fr)] lg:gap-12">
          <section className="min-w-0">
            <p className="text-sm font-semibold tracking-[0.08em] text-muted-foreground">
              {userDisplayName ? `${userDisplayName}，欢迎回来！` : '欢迎回来！'}
            </p>
            <h1 className="mt-3 whitespace-nowrap text-[clamp(2rem,4vw,4rem)] font-semibold leading-[1.02] tracking-[-0.055em]">今天，想创作什么？</h1>
          </section>

          <section
            data-testid="ai-module-options"
            aria-label="AI 模块列表"
            className="module-selection-options"
          >
            {aiModules.map((module) => {
              const content = moduleSelectionContent[module.id];
              const enabledByPolicy = isAiModuleAllowed(module.id, moduleAccess);
              const enabled = module.enabled && enabledByPolicy;
              return (
                <button
                  key={module.id}
                  type="button"
                  data-testid={`ai-module-option-${module.id}`}
                  disabled={!enabled}
                  aria-disabled={!enabled}
                  onClick={() => openModule(module.route, enabled)}
                  aria-label={`${content.label}：${module.description}${enabled ? '' : '（已关闭）'}`}
                  className={cn(
                    'module-option-card module-option-card-horizontal group motion-press flex w-full min-w-0 items-stretch rounded-lg border border-transparent bg-transparent p-0 text-left shadow-none disabled:cursor-not-allowed disabled:bg-transparent disabled:text-muted-foreground/70 disabled:opacity-75',
                    !enabled && 'module-option-card-disabled',
                  )}
                >
                  <span className="module-option-card-frame" aria-hidden="true" />
                  <div className="module-option-card-surface relative flex h-full w-full rounded-lg bg-background">
                    <div className="module-option-card-image relative shrink-0">
                      <img
                        src={content.image}
                        alt={content.imageAlt}
                        className={cn('module-option-card-image-media h-full w-full object-cover', !enabled && 'grayscale')}
                        draggable="false"
                      />
                    </div>
                    <div className="module-option-card-content relative min-h-0 flex-1">
                      <p className="module-option-card-title font-medium tracking-[-0.02em]">{content.label}</p>
                      <p className="module-option-card-description font-medium text-muted-foreground">{module.description}</p>
                      {!enabled ? (
                        <p className="module-option-card-status font-semibold">
                          {module.enabled ? '管理员已关闭' : '暂未开放'}
                        </p>
                      ) : null}
                    </div>
                  </div>
                  <span className="module-option-card-hit-area" aria-hidden="true" />
                </button>
              );
            })}
          </section>
        </div>
      </div>
      <UserProfileDialog
        open={profileDialogShouldBeOpen}
        required={profileRequired}
        syncError={profileSyncError}
        onOpenChange={(open) => {
          if (open) {
            setDismissedSyncError(null);
            setProfileDialogOpen(true);
            return;
          }
          if (profileSyncError) setDismissedSyncError(profileSyncError);
          setProfileDialogOpen(false);
        }}
      />
    </main>
  );
}

export default ModuleSelection;