import assert from 'assert';
import axios, { AxiosInstance } from 'axios';
import { ConductorSDKOptions, WorkflowDefinition, WorkflowMetadataDefinition } from './index';

class WorkflowMetadataManager {
  options: ConductorSDKOptions;
  client: AxiosInstance;

  constructor(options: ConductorSDKOptions = {}) {
    this.options = options;

    const { apiEndpoint } = this.options;
    assert(apiEndpoint, 'apiEndpoint is empty');

    this.client = axios.create({
      baseURL: apiEndpoint,
      responseType: 'json',
    });
  }

  async getAllWorkflows() {
    const { data } = await this.client.get<WorkflowDefinition[]>('/metadata/workflow');
    return data;
  }

  async getWorkflow(name: string, version?: number) {
    let suffix = version !== undefined ? `?version=${version}` : '';
    const url = `/metadata/workflow/${name}${suffix}`;
    const { data } = await this.client.get<WorkflowDefinition>(url);
    return data;
  }

  async registerWorkflow(workflow: WorkflowMetadataDefinition) {
    await this.client.post<WorkflowDefinition>(`/metadata/workflow`, workflow);
    const workflowObject = await this.getWorkflow(workflow.name);
    assert(workflowObject.name === workflow.name, 'Create a workflow, but can not find workflow');
    return workflowObject;
  }

  async registerOrUpdateWorkflow(workflow: WorkflowMetadataDefinition) {
    const name = workflow.name;
    const version = workflow.version;
    await this.client.put<void>(`/metadata/workflow`, [workflow]);
    return this.getWorkflow(name, version);
  }
}

export default WorkflowMetadataManager;
export { WorkflowMetadataManager };