package jnpf.dmsService;

import jnpf.flowable.entity.TemplateJsonEntity;
import jnpf.flowable.entity.TemplateNodeEntity;
import jnpf.flowable.enums.NodeEnum;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

final class DmsQianpiyeFlowFixtures {
    static final List<String> STEP_NAMES = List.of("发起申请", "部门审核", "起草人", "文件审批",
            "起草人与客户确认", "QA审批", "起草人", "文件培训");

    private DmsQianpiyeFlowFixtures() {
    }

    static List<TemplateNodeEntity> steps(String prefix) {
        List<TemplateNodeEntity> nodes = new ArrayList<>();
        for (int index = 0; index < STEP_NAMES.size(); index++) {
            TemplateNodeEntity node = new TemplateNodeEntity();
            node.setId(prefix + "-row-" + (STEP_NAMES.size() - index));
            node.setNodeCode(prefix + index);
            node.setNodeType(index == 0 ? NodeEnum.START.getType() : NodeEnum.APPROVER.getType());
            node.setNodeJson("{\"nodeName\":\"" + STEP_NAMES.get(index) + "\"}");
            node.setCreatorTime(new Date(1000L * (STEP_NAMES.size() - index)));
            nodes.add(node);
        }
        return nodes;
    }

    static TemplateJsonEntity version(String id, String prefix) {
        TemplateJsonEntity version = new TemplateJsonEntity();
        version.setId(id);
        version.setState(1);
        version.setVersion("1.0");
        version.setFlowXml(linearXml(steps(prefix).stream().map(TemplateNodeEntity::getNodeCode)
                .toArray(String[]::new)));
        return version;
    }

    static String linearXml(String... codes) {
        StringBuilder xml = new StringBuilder("<definitions xmlns=\"http://www.omg.org/spec/BPMN/20100524/MODEL\"><process id=\"flow\">");
        xml.append("<startEvent id=\"").append(codes[0]).append("\"/>");
        // Deliberately store task elements in the opposite order from their connections.
        for (int index = codes.length - 1; index > 0; index--) {
            xml.append("<userTask id=\"").append(codes[index]).append("\"/>");
        }
        for (int index = 1; index < codes.length; index++) {
            xml.append("<sequenceFlow id=\"edge").append(index).append("\" sourceRef=\"")
                    .append(codes[index - 1]).append("\" targetRef=\"").append(codes[index]).append("\"/>");
        }
        return xml.append("</process></definitions>").toString();
    }
}