package edu.whut.smilepicturebackend.controller;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import edu.whut.smilepicturebackend.annotation.AuthCheck;
import edu.whut.smilepicturebackend.api.aliyunai.AliYunAiApi;
import edu.whut.smilepicturebackend.api.aliyunai.model.CreateOutPaintingTaskResponse;
import edu.whut.smilepicturebackend.api.aliyunai.model.GetOutPaintingTaskResponse;
import edu.whut.smilepicturebackend.api.imagesearch.ImageSearchApiFacade;
import edu.whut.smilepicturebackend.api.imagesearch.model.ImageSearchResult;
import edu.whut.smilepicturebackend.common.BaseResponse;
import edu.whut.smilepicturebackend.common.DeleteRequest;
import edu.whut.smilepicturebackend.common.ResultUtils;
import edu.whut.smilepicturebackend.constant.UserConstant;
import edu.whut.smilepicturebackend.exception.BusinessException;
import edu.whut.smilepicturebackend.exception.ErrorCode;
import edu.whut.smilepicturebackend.exception.ThrowUtils;
import edu.whut.smilepicturebackend.manager.auth.SpaceUserAuthManager;
import edu.whut.smilepicturebackend.manager.auth.StpKit;
import edu.whut.smilepicturebackend.manager.auth.annotation.SaSpaceCheckPermission;
import edu.whut.smilepicturebackend.manager.auth.model.SpaceUserPermissionConstant;
import edu.whut.smilepicturebackend.model.dto.picture.*;
import edu.whut.smilepicturebackend.model.entity.Picture;
import edu.whut.smilepicturebackend.model.entity.Space;
import edu.whut.smilepicturebackend.model.entity.User;
import edu.whut.smilepicturebackend.model.enums.PictureReviewStatusEnum;
import edu.whut.smilepicturebackend.model.vo.PictureTagCategory;
import edu.whut.smilepicturebackend.model.vo.PictureVO;
import edu.whut.smilepicturebackend.service.PictureService;
import edu.whut.smilepicturebackend.service.SpaceService;
import edu.whut.smilepicturebackend.service.UserService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;


@Slf4j
@RestController
@RequiredArgsConstructor
@RequestMapping("/picture")
public class PictureController {
    private final UserService userService;
    private final PictureService pictureService;
    private final SpaceService spaceService;
    private final AliYunAiApi aliYunAiApi;
    private final SpaceUserAuthManager spaceUserAuthManager;


    /**
     * 上传图片（可重新上传），前端选中图片就会调用该接口，无需前端点'创建'按钮！
     *TODO:目前有个bug，用户上传图片需要审核，会跳转到一个空白的图片详情页
     */
    @PostMapping("/upload")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_UPLOAD)
//    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<PictureVO> uploadPicture(
            @RequestPart("file") MultipartFile multipartFile,
            PictureUploadRequest pictureUploadRequest,
            HttpServletRequest request) {
        User loginUser = userService.getLoginUser(request);
        PictureVO pictureVO = pictureService.uploadPicture(multipartFile, pictureUploadRequest, loginUser);
        return ResultUtils.success(pictureVO);
    }

    /**
     * 通过 URL 上传图片（可重新上传）
     */
    @PostMapping("/upload/url")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_UPLOAD)
    public BaseResponse<PictureVO> uploadPictureByUrl(
            @RequestBody PictureUploadRequest pictureUploadRequest,
            HttpServletRequest request) {
        User loginUser = userService.getLoginUser(request);
        String fileUrl = pictureUploadRequest.getFileUrl();
        PictureVO pictureVO = pictureService.uploadPicture(fileUrl, pictureUploadRequest, loginUser);
        return ResultUtils.success(pictureVO);
    }

    /**
     * 删除图片
     * @param deleteRequest
     * @param request
     * @return
     */
    @PostMapping("/delete")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_DELETE)
    public BaseResponse<Boolean> deletePicture(@RequestBody DeleteRequest deleteRequest,
                                               HttpServletRequest request) {
        if (deleteRequest == null || deleteRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        User loginUser = userService.getLoginUser(request);
        pictureService.deletePicture(deleteRequest.getId(), loginUser);
        return ResultUtils.success(true);
    }

    /**
     * 编辑图片（给用户使用）或创建图片时，编辑标签、分类的时候
     */
    @PostMapping("/edit")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_EDIT)
    public BaseResponse<Boolean> editPicture(@RequestBody PictureEditRequest pictureEditRequest, HttpServletRequest request) {
        if (pictureEditRequest == null || pictureEditRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        User loginUser = userService.getLoginUser(request);
        pictureService.editPicture(pictureEditRequest, loginUser);
        return ResultUtils.success(true);
    }

    /**
     * 更新图片（仅管理员可用）
     *
     * @param pictureUpdateRequest
     * @param request
     * @return
     */
    @PostMapping("/update")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Boolean> updatePicture(@RequestBody PictureUpdateRequest pictureUpdateRequest,
                                               HttpServletRequest request) {
        if (pictureUpdateRequest == null || pictureUpdateRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        // 将实体类和 DTO 进行转换
        Picture picture = new Picture();
        BeanUtils.copyProperties(pictureUpdateRequest, picture);
        // 注意将 list 转为 string
        // List.of("Java", "Python", "AI") --> "["Java", "Python", "AI"]"
        picture.setTags(JSONUtil.toJsonStr(pictureUpdateRequest.getTags()));
        // 数据校验
        pictureService.validPicture(picture);
        // 判断是否存在
        long id = pictureUpdateRequest.getId();
        Picture oldPicture = pictureService.getById(id);
        ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR);
        // 补充审核参数
        User loginUser=userService.getLoginUser(request);
        pictureService.fillReviewParams(picture, loginUser);

        // 操作数据库
        boolean result = pictureService.updateById(picture);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        return ResultUtils.success(true);
    }

    /**
     * 根据 id 获取图片（仅管理员可用）
     */
    @GetMapping("/get")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Picture> getPictureById(long id, HttpServletRequest request) {
        ThrowUtils.throwIf(id <= 0, ErrorCode.PARAMS_ERROR);
        // 查询数据库
        Picture picture = pictureService.getById(id);
        ThrowUtils.throwIf(picture == null, ErrorCode.NOT_FOUND_ERROR);
        // 获取封装类
        return ResultUtils.success(picture);
    }

    /**
     * 根据 id 获取图片（封装类）
     * 这里不用sa-token的注解鉴权，因为它强制要求用户登录。故这里使用编程式注解
     */
    @GetMapping("/get/vo")
    public BaseResponse<PictureVO> getPictureVOById(long id, HttpServletRequest request) {
        ThrowUtils.throwIf(id <= 0, ErrorCode.PARAMS_ERROR);
        // 查询数据库
        Picture picture = pictureService.getById(id);
        ThrowUtils.throwIf(picture == null, ErrorCode.NOT_FOUND_ERROR);
//        ThrowUtils.throwIf(PictureReviewStatusEnum.PASS.getValue()!=picture.getReviewStatus(),ErrorCode.NOT_FOUND_ERROR);
        // 空间权限校验
        Long spaceId = picture.getSpaceId();
        Space space = null;
        // 权限判断 —— 只对“团队空间”才要求登录 & 权限
        if (spaceId != null) {
            boolean hasPermission = StpKit.SPACE.hasPermission(SpaceUserPermissionConstant.PICTURE_VIEW); //编程式鉴权
            ThrowUtils.throwIf(!hasPermission, ErrorCode.NO_AUTH_ERROR);
             //User loginUser = userService.getLoginUser(request);
             //已经改为使用sa-token鉴权
            //pictureService.checkPictureAuth(loginUser, picture);
            space = spaceService.getById(spaceId);
            ThrowUtils.throwIf(space == null, ErrorCode.NOT_FOUND_ERROR, "空间不存在");
        }
        // 获取权限列表
        User loginUser = userService.getLoginUser(request);
        List<String> permissionList = spaceUserAuthManager.getPermissionList(space, loginUser);
        PictureVO pictureVO = pictureService.getPictureVO(picture, request);
        pictureVO.setPermissionList(permissionList);
        // 获取封装类
        return ResultUtils.success(pictureVO);
    }

    /**
     * 分页获取图片列表（仅管理员可用）
     */
    @PostMapping("/list/page")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Page<Picture>> listPictureByPage(@RequestBody PictureQueryRequest pictureQueryRequest) {
        long current = pictureQueryRequest.getCurrent();
        long size = pictureQueryRequest.getPageSize();
        // 查询数据库
        Page<Picture> picturePage = pictureService.page(new Page<>(current, size),
                pictureService.getQueryWrapper(pictureQueryRequest));
        return ResultUtils.success(picturePage);
    }

    /**
     * 分页获取图片列表（封装类，脱敏）,普通用户使用，且不能看到未过审的图片
     */
    @PostMapping("/list/page/vo")
    public BaseResponse<Page<PictureVO>> listPictureVOByPage(@RequestBody PictureQueryRequest pictureQueryRequest,
                                                             HttpServletRequest request) {
        long current = pictureQueryRequest.getCurrent();
        long size = pictureQueryRequest.getPageSize();
        // 限制爬虫，一次不能请求超过20页
        ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
        // 空间权限校验
        Long spaceId = pictureQueryRequest.getSpaceId();
        if (spaceId == null) {
            // 公开图库
            // 普通用户默认只能看到审核通过的数据
            pictureQueryRequest.setReviewStatus(PictureReviewStatusEnum.PASS.getValue());
            pictureQueryRequest.setNullSpaceId(true);
        } else {
            // 私有空间、团队空间，无需过审
            boolean hasPermission = StpKit.SPACE.hasPermission(SpaceUserPermissionConstant.PICTURE_VIEW);
            ThrowUtils.throwIf(!hasPermission, ErrorCode.NO_AUTH_ERROR);
            //已改为编程式鉴权
//            User loginUser = userService.getLoginUser(request);
//            Space space = spaceService.getById(spaceId);
//            ThrowUtils.throwIf(space == null, ErrorCode.NOT_FOUND_ERROR, "空间不存在");
//            if (!loginUser.getId().equals(space.getUserId())) {
//                throw new BusinessException(ErrorCode.NO_AUTH_ERROR, "没有空间权限");
//            }
        }
        // 查询数据库
        Page<Picture> picturePage = pictureService.page(new Page<>(current, size),
                pictureService.getQueryWrapper(pictureQueryRequest));
        // 获取封装类
        return ResultUtils.success(pictureService.getPictureVOPage(picturePage, request));
    }

    /**
     * 分页获取图片列表（封装类，有缓存）
     */
    @Deprecated
    @PostMapping("/list/page/vo/cache")
    public BaseResponse<Page<PictureVO>> listPictureVOByPageWithCache(
            @RequestBody PictureQueryRequest pictureQueryRequest,
            HttpServletRequest request) {

        Page<PictureVO> page = pictureService
                .listPictureVOByPageWithCache(pictureQueryRequest, request);

        return ResultUtils.success(page);
    }


    @GetMapping("/tag_category")
    public BaseResponse<PictureTagCategory> listPictureTagCategory() {
        PictureTagCategory pictureTagCategory = new PictureTagCategory();
        List<String> tagList = Arrays.asList("热门", "搞笑", "生活", "高清", "艺术", "校园", "背景", "简历", "创意");
        List<String> categoryList = Arrays.asList("模板", "电商", "表情包", "素材", "海报");
        pictureTagCategory.setTagList(tagList);
        pictureTagCategory.setCategoryList(categoryList);
        return ResultUtils.success(pictureTagCategory);
    }

    /**
     * 审核图片
     */
    @PostMapping("/review")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Boolean> doPictureReview(@RequestBody PictureReviewRequest pictureReviewRequest,
                                                 HttpServletRequest request) {
        ThrowUtils.throwIf(pictureReviewRequest == null, ErrorCode.PARAMS_ERROR);
        User loginUser = userService.getLoginUser(request);
        pictureService.doPictureReview(pictureReviewRequest, loginUser);
        return ResultUtils.success(true);
    }

    /**
     * 批量抓取并创建图片
     */
    @PostMapping("/upload/batch")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Integer> uploadPictureByBatch(@RequestBody PictureUploadByBatchRequest pictureUploadByBatchRequest,
                                                      HttpServletRequest request) {
        ThrowUtils.throwIf(pictureUploadByBatchRequest == null, ErrorCode.PARAMS_ERROR);
        User loginUser = userService.getLoginUser(request);
        int uploadCount = pictureService.uploadPictureByBatch(pictureUploadByBatchRequest, loginUser);
        return ResultUtils.success(uploadCount);
    }

    /**
     * 以图搜图
     */
    @PostMapping("/search/picture")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_VIEW)
    public BaseResponse<List<ImageSearchResult>> getSimilarPicture(@RequestBody SearchPictureByPictureRequest request) throws IOException {
        ThrowUtils.throwIf(request == null, ErrorCode.NO_AUTH_ERROR);
        List<ImageSearchResult> similarImage = pictureService.getSimilarPicture(request);
        return ResultUtils.success(similarImage);
    }

    /**
     * 按照颜色搜索
     */
    @PostMapping("/search/color")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_VIEW)
    public BaseResponse<List<PictureVO>> searchPictureByColor(@RequestBody SearchPictureByColorRequest searchPictureByColorRequest, HttpServletRequest request) {
        ThrowUtils.throwIf(searchPictureByColorRequest == null, ErrorCode.PARAMS_ERROR);
        String picColor = searchPictureByColorRequest.getPicColor();
        Long spaceId = searchPictureByColorRequest.getSpaceId();
        User loginUser = userService.getLoginUser(request);
        List<PictureVO> pictureVOList = pictureService.searchPictureByColor(spaceId, picColor, loginUser);
        return ResultUtils.success(pictureVOList);
    }

    /**
     * 对私人/团队空间批量编辑图片
     */
    @PostMapping("/edit/batch")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_EDIT)
    public BaseResponse<Boolean> editPictureByBatch(@RequestBody PictureEditByBatchRequest pictureEditByBatchRequest, HttpServletRequest request) {
        ThrowUtils.throwIf(pictureEditByBatchRequest == null, ErrorCode.PARAMS_ERROR);
        User loginUser = userService.getLoginUser(request);
        pictureService.editPictureByBatch(pictureEditByBatchRequest, loginUser);
        return ResultUtils.success(true);
    }

    /**
     *创建 AI 扩图任务
     * @param createPictureOutPaintingTaskRequest
     * @param request
     * @return
     */
    @PostMapping("/out_painting/create_task")
    @SaSpaceCheckPermission(value = SpaceUserPermissionConstant.PICTURE_EDIT)
    public BaseResponse<CreateOutPaintingTaskResponse> createPictureOutPaintingTask(@RequestBody CreatePictureOutPaintingTaskRequest createPictureOutPaintingTaskRequest,
                                                                                    HttpServletRequest request) {
        if (createPictureOutPaintingTaskRequest == null || createPictureOutPaintingTaskRequest.getPictureId() == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        User loginUser = userService.getLoginUser(request);
        CreateOutPaintingTaskResponse response = pictureService.createPictureOutPaintingTask(createPictureOutPaintingTaskRequest, loginUser);
        return ResultUtils.success(response);
    }

    /**
     * 查询 AI 扩图任务 ，前端轮询结果，当结果中有SUCCESS，那么同时取出该响应中的结果。
     */
    @GetMapping("/out_painting/get_task")
    public BaseResponse<GetOutPaintingTaskResponse> getPictureOutPaintingTask(String taskId) {
        ThrowUtils.throwIf(StrUtil.isBlank(taskId), ErrorCode.PARAMS_ERROR);
        GetOutPaintingTaskResponse task = aliYunAiApi.getOutPaintingTask(taskId);
        return ResultUtils.success(task);
    }
}
