package cn.stylefeng.guns.workflow.modular.controller;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/**
 * editor的上下文
 *
 * @author fengshuonan
 * @Date 2019/8/7 23:08
 */
@RestController
public class ModelEditorJsonRestResources implements ModelDataJsonConstants {

    protected static final Logger LOGGER = LoggerFactory.getLogger(ModelEditorJsonRestResources.class);

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private ObjectMapper objectMapper;

    @RequestMapping(value = "/model/{modelId}/json", method = RequestMethod.GET, produces = "application/json")
    @ResponseBody
    public String getEditorJson(@PathVariable String modelId) {
        ObjectNode modelNode = null;
        Model model = repositoryService.getModel(modelId);
        if (model != null) {
            try {
                if (StringUtils.isNotEmpty(model.getMetaInfo())) {
                    modelNode = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
                } else {
                    modelNode = objectMapper.createObjectNode();
                    modelNode.put(MODEL_NAME, model.getName());
                }
                modelNode.put(MODEL_ID, model.getId());
                ObjectNode editorJsonNode = (ObjectNode) objectMapper.readTree(
                        new String(repositoryService.getModelEditorSource(model.getId()), "utf-8"));
                modelNode.put("model", editorJsonNode);
            } catch (Exception e) {
                LOGGER.error("Error creating model JSON", e);
                throw new ActivitiException("Error creating model JSON", e);
            }
        }

        String s = null;
        try {
            s = objectMapper.writeValueAsString(modelNode);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }

        return s;
    }
}