'use client';

import Link from 'next/link';
import { useMemo, useState } from 'react';
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
import { useSearchParams } from 'next/navigation';
import {
  ArrowLeft,
  ChevronDown,
  ChevronRight,
  FileText,
  Loader2,
  Trash2,
  Upload,
} from 'lucide-react';
import { toast } from 'sonner';

import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@/components/ui/alert-dialog';
import { EmptyStateWithBorder } from '@/components/layout/empty';
import { ErrorInline } from '@/components/layout/error';
import { LoadingStateWithBorder } from '@/components/layout/loading';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/components/ui/table';
import { type PagesDeployment, PagesService } from '@/lib/services/openflare';
import { formatDateTime } from '@/lib/utils';

import { DeploymentUploadDialog } from '../components/deployment-upload-dialog';
import { ProjectEditorDialog } from '../components/project-editor-dialog';
import {
  deploymentFilesQueryKey,
  deploymentsQueryKey,
  formatBytes,
  projectQueryKey,
  projectsQueryKey,
} from '../components/pages-utils';

function DeploymentFilesPanel({
  projectId,
  deployment,
}: {
  projectId: number;
  deployment: PagesDeployment;
}) {
  const filesQuery = useQuery({
    queryKey: deploymentFilesQueryKey(projectId, deployment.id),
    queryFn: () => PagesService.listDeploymentFiles(deployment.id),
  });

  if (filesQuery.isLoading) {
    return (
      <p className='px-4 py-3 text-xs text-muted-foreground'>加载文件清单...</p>
    );
  }

  if (filesQuery.isError) {
    return (
      <p className='px-4 py-3 text-xs text-destructive'>
        {filesQuery.error instanceof Error
          ? filesQuery.error.message
          : '加载失败'}
      </p>
    );
  }

  const files = filesQuery.data ?? [];
  if (files.length === 0) {
    return (
      <p className='px-4 py-3 text-xs text-muted-foreground'>暂无文件记录</p>
    );
  }

  return (
    <div className='border-t border-dashed bg-muted/10'>
      <Table>
        <TableHeader>
          <TableRow className='border-dashed hover:bg-transparent'>
            <TableHead className='text-xs'>路径</TableHead>
            <TableHead className='text-xs text-right'>大小</TableHead>
          </TableRow>
        </TableHeader>
        <TableBody>
          {files.map((file) => (
            <TableRow key={file.id} className='border-dashed'>
              <TableCell className='text-xs font-mono'>{file.path}</TableCell>
              <TableCell className='text-xs text-right text-muted-foreground'>
                {formatBytes(file.size)}
              </TableCell>
            </TableRow>
          ))}
        </TableBody>
      </Table>
    </div>
  );
}

export function PagesDetailPageClient() {
  const searchParams = useSearchParams();
  const queryClient = useQueryClient();
  const projectId = searchParams.get('id')?.trim() ?? '';
  const parsedProjectId = Number(projectId);

  const [editorOpen, setEditorOpen] = useState(false);
  const [uploadOpen, setUploadOpen] = useState(false);
  const [expandedDeploymentId, setExpandedDeploymentId] = useState<
    number | null
  >(null);
  const [deleteProjectOpen, setDeleteProjectOpen] = useState(false);
  const [pendingDeploymentAction, setPendingDeploymentAction] = useState<{
    type: 'activate' | 'delete';
    deployment: PagesDeployment;
  } | null>(null);

  const enabled = projectId !== '' && Number.isFinite(parsedProjectId);

  const projectQuery = useQuery({
    queryKey: projectQueryKey(projectId),
    queryFn: () => PagesService.getProject(parsedProjectId),
    enabled,
  });

  const deploymentsQuery = useQuery({
    queryKey: deploymentsQueryKey(parsedProjectId),
    queryFn: () => PagesService.listDeployments(parsedProjectId),
    enabled,
  });

  const activateMutation = useMutation({
    mutationFn: (deploymentId: number) =>
      PagesService.activateDeployment(parsedProjectId, deploymentId),
    onSuccess: async () => {
      toast.success('部署已激活');
      await Promise.all([
        queryClient.invalidateQueries({
          queryKey: deploymentsQueryKey(parsedProjectId),
        }),
        queryClient.invalidateQueries({ queryKey: projectQueryKey(projectId) }),
        queryClient.invalidateQueries({ queryKey: projectsQueryKey }),
      ]);
      setPendingDeploymentAction(null);
    },
    onError: (error) => {
      toast.error(error instanceof Error ? error.message : '激活失败');
    },
  });

  const deleteDeploymentMutation = useMutation({
    mutationFn: (deploymentId: number) =>
      PagesService.deleteDeployment(parsedProjectId, deploymentId),
    onSuccess: async () => {
      toast.success('部署已删除');
      await Promise.all([
        queryClient.invalidateQueries({
          queryKey: deploymentsQueryKey(parsedProjectId),
        }),
        queryClient.invalidateQueries({ queryKey: projectQueryKey(projectId) }),
        queryClient.invalidateQueries({ queryKey: projectsQueryKey }),
      ]);
      setPendingDeploymentAction(null);
    },
    onError: (error) => {
      toast.error(error instanceof Error ? error.message : '删除失败');
    },
  });

  const deleteProjectMutation = useMutation({
    mutationFn: () => PagesService.deleteProject(parsedProjectId),
    onSuccess: async () => {
      toast.success('项目已删除');
      await queryClient.invalidateQueries({ queryKey: projectsQueryKey });
      window.location.href = '/pages';
    },
    onError: (error) => {
      toast.error(error instanceof Error ? error.message : '删除失败');
    },
  });

  const project = projectQuery.data;
  const deployments = useMemo(
    () => deploymentsQuery.data ?? [],
    [deploymentsQuery.data],
  );

  if (!enabled) {
    return (
      <div className='py-6 px-1'>
        <EmptyStateWithBorder description='缺少有效的 Pages 项目 ID。' />
      </div>
    );
  }

  if (projectQuery.isLoading) {
    return (
      <div className='py-6 px-1'>
        <LoadingStateWithBorder icon={FileText} description='加载项目详情...' />
      </div>
    );
  }

  if (projectQuery.isError) {
    return (
      <div className='py-6 px-1'>
        <ErrorInline
          message={
            projectQuery.error instanceof Error
              ? projectQuery.error.message
              : '加载失败'
          }
          onRetry={() => void projectQuery.refetch()}
        />
      </div>
    );
  }

  if (!project) {
    return (
      <div className='py-6 px-1 space-y-4'>
        <Button variant='ghost' size='sm' asChild>
          <Link href='/pages'>
            <ArrowLeft className='size-4 mr-1' />
            返回列表
          </Link>
        </Button>
        <EmptyStateWithBorder description='Pages 项目不存在或已被删除。' />
      </div>
    );
  }

  return (
    <div className='py-6 px-1 space-y-6'>
      <div className='flex flex-col gap-4 lg:flex-row lg:items-start lg:justify-between'>
        <div className='space-y-2'>
          <Button variant='ghost' size='sm' className='h-8 px-2 -ml-2' asChild>
            <Link href='/pages'>
              <ArrowLeft className='size-4 mr-1' />
              返回列表
            </Link>
          </Button>
          <div className='flex items-center gap-2'>
            <FileText className='size-5 text-primary' />
            <h1 className='text-2xl font-semibold tracking-tight'>
              {project.name}
            </h1>
          </div>
          <p className='text-sm text-muted-foreground'>
            {project.slug} · {project.deployment_count} 个部署
          </p>
        </div>
        <div className='flex flex-wrap gap-2'>
          <Button
            variant='outline'
            size='sm'
            onClick={() => setEditorOpen(true)}
          >
            编辑项目
          </Button>
          <Button size='sm' onClick={() => setUploadOpen(true)}>
            <Upload className='size-3.5 mr-1' />
            上传部署包
          </Button>
          <Button
            variant='destructive'
            size='sm'
            onClick={() => setDeleteProjectOpen(true)}
          >
            <Trash2 className='size-3.5 mr-1' />
            删除项目
          </Button>
        </div>
      </div>

      <div className='grid gap-3 sm:grid-cols-3'>
        <div className='rounded-lg border border-dashed px-4 py-3'>
          <p className='text-[10px] uppercase tracking-wider text-muted-foreground'>
            状态
          </p>
          <Badge variant='outline' className='mt-2 text-[10px]'>
            {project.enabled ? '已启用' : '已停用'}
          </Badge>
        </div>
        <div className='rounded-lg border border-dashed px-4 py-3'>
          <p className='text-[10px] uppercase tracking-wider text-muted-foreground'>
            当前激活
          </p>
          <p className='mt-2 text-sm font-semibold'>
            {project.active_deployment
              ? `#${project.active_deployment.deployment_number}`
              : '暂无'}
          </p>
        </div>
        <div className='rounded-lg border border-dashed px-4 py-3'>
          <p className='text-[10px] uppercase tracking-wider text-muted-foreground'>
            更新时间
          </p>
          <p className='mt-2 text-sm'>{formatDateTime(project.updated_at)}</p>
        </div>
      </div>

      <div className='border border-dashed rounded-lg overflow-hidden bg-background'>
        <div className='px-4 py-3 border-b border-dashed'>
          <h2 className='text-sm font-semibold'>部署历史</h2>
          <p className='text-xs text-muted-foreground mt-1'>
            部署不可变；激活后发布配置，Agent 才会拉取并切换静态资源。
          </p>
        </div>

        {deploymentsQuery.isLoading ? (
          <LoadingStateWithBorder />
        ) : deployments.length === 0 ? (
          <EmptyStateWithBorder
            title='暂无部署'
            description='上传 zip 部署包后，可以在这里激活某个部署版本。'
          />
        ) : (
          <div className='divide-y divide-dashed'>
            {deployments.map((deployment) => {
              const expanded = expandedDeploymentId === deployment.id;
              return (
                <div key={deployment.id}>
                  <div className='flex flex-col gap-3 p-4 md:flex-row md:items-center md:justify-between'>
                    <div className='flex items-start gap-2'>
                      <Button
                        variant='ghost'
                        size='icon'
                        className='size-7 shrink-0'
                        onClick={() =>
                          setExpandedDeploymentId(
                            expanded ? null : deployment.id,
                          )
                        }
                      >
                        {expanded ? (
                          <ChevronDown className='size-4' />
                        ) : (
                          <ChevronRight className='size-4' />
                        )}
                      </Button>
                      <div>
                        <div className='flex items-center gap-2'>
                          <p className='text-sm font-medium'>
                            #{deployment.deployment_number}
                          </p>
                          {deployment.status === 'active' ? (
                            <Badge variant='outline' className='text-[10px]'>
                              已激活
                            </Badge>
                          ) : null}
                        </div>
                        <p className='mt-1 text-xs text-muted-foreground'>
                          {deployment.checksum.slice(0, 16)} ·{' '}
                          {deployment.file_count} files ·{' '}
                          {formatBytes(deployment.total_size)}
                        </p>
                        <p className='mt-1 text-xs text-muted-foreground'>
                          创建于 {formatDateTime(deployment.created_at)}
                        </p>
                      </div>
                    </div>
                    <div className='flex gap-2 md:ml-9'>
                      <Button
                        variant='outline'
                        size='sm'
                        disabled={
                          deployment.status === 'active' ||
                          activateMutation.isPending
                        }
                        onClick={() =>
                          setPendingDeploymentAction({
                            type: 'activate',
                            deployment,
                          })
                        }
                      >
                        激活
                      </Button>
                      <Button
                        variant='destructive'
                        size='sm'
                        disabled={
                          deployment.status === 'active' ||
                          deleteDeploymentMutation.isPending
                        }
                        onClick={() =>
                          setPendingDeploymentAction({
                            type: 'delete',
                            deployment,
                          })
                        }
                      >
                        删除
                      </Button>
                    </div>
                  </div>
                  {expanded ? (
                    <DeploymentFilesPanel
                      projectId={parsedProjectId}
                      deployment={deployment}
                    />
                  ) : null}
                </div>
              );
            })}
          </div>
        )}
      </div>

      <ProjectEditorDialog
        open={editorOpen}
        onOpenChange={setEditorOpen}
        project={project}
      />
      <DeploymentUploadDialog
        open={uploadOpen}
        onOpenChange={setUploadOpen}
        projectId={parsedProjectId}
      />

      <AlertDialog open={deleteProjectOpen} onOpenChange={setDeleteProjectOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>删除 Pages 项目</AlertDialogTitle>
            <AlertDialogDescription>
              确认删除项目 {project.name} 吗？此操作不可恢复。
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel>取消</AlertDialogCancel>
            <AlertDialogAction
              className='bg-destructive text-destructive-foreground hover:bg-destructive/90'
              onClick={() => deleteProjectMutation.mutate()}
            >
              {deleteProjectMutation.isPending ? (
                <Loader2 className='size-4 animate-spin' />
              ) : (
                '确认删除'
              )}
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>

      <AlertDialog
        open={pendingDeploymentAction !== null}
        onOpenChange={(open) => {
          if (!open) setPendingDeploymentAction(null);
        }}
      >
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>
              {pendingDeploymentAction?.type === 'activate'
                ? '激活部署'
                : '删除部署'}
            </AlertDialogTitle>
            <AlertDialogDescription>
              {pendingDeploymentAction?.type === 'activate'
                ? `确认激活部署 #${pendingDeploymentAction.deployment.deployment_number} 吗？`
                : `确认删除部署 #${pendingDeploymentAction?.deployment.deployment_number} 吗？`}
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel>取消</AlertDialogCancel>
            <AlertDialogAction
              className={
                pendingDeploymentAction?.type === 'delete'
                  ? 'bg-destructive text-destructive-foreground hover:bg-destructive/90'
                  : undefined
              }
              onClick={() => {
                if (!pendingDeploymentAction) return;
                if (pendingDeploymentAction.type === 'activate') {
                  activateMutation.mutate(
                    pendingDeploymentAction.deployment.id,
                  );
                } else {
                  deleteDeploymentMutation.mutate(
                    pendingDeploymentAction.deployment.id,
                  );
                }
              }}
            >
              确认
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </div>
  );
}