import { put, call, retry } from 'redux-saga/effects';
import { 
  FETCH_ISSUES_SUCCESS, FETCH_ISSUES_FAILURE, 
  ADD_LABEL_FAILURE, ADD_LABEL_SUCCESS, 
  REMOVE_LABEL_FAILURE, REMOVE_LABEL_SUCCESS, 
  CREATE_ISSUE_FAILURE, CREATE_ISSUE_SUCCESS 
} from '../actions/issues';
import { gitea } from '../../util/gitea';

export function* fetchIssuesSaga(action: any) {
  const { project } = action;

  let issues = [];
  try {
    let page = 1;
    while(true) {
      let pageIssues = yield call(gitea.fetchIssues.bind(gitea), action.project, page);
      if (pageIssues.length === 0) {
        break;
      }
      issues.push(...pageIssues);
      page++;
    }
    
  } catch(error) {
    yield put({ type: FETCH_ISSUES_FAILURE, project, error });
    return;
  }

  yield put({ type: FETCH_ISSUES_SUCCESS, project, issues });
}

export function* addLabelSaga(action: any) {
  const { project, issueNumber, label } = action;
  const labels = yield call(gitea.fetchProjectLabels.bind(gitea), project);
  const giteaLabel = labels.find((l: any) => l.name === label)

  if (!giteaLabel) {
    yield put({ type: ADD_LABEL_FAILURE, error: new Error(`Label "${label}" not found !`) });
    return;
  }

  try {
    yield retry(5, 250, gitea.addIssueLabel.bind(gitea), project, issueNumber, giteaLabel.id);
  } catch(error) {
    yield put({ type: ADD_LABEL_FAILURE, error });
    return;
  }

  yield put({ type: ADD_LABEL_SUCCESS, project, issueNumber, label });
}

export function* removeLabelSaga(action: any) {
  const { project, issueNumber, label } = action;
  const labels = yield call(gitea.fetchProjectLabels.bind(gitea), project);
  const giteaLabel = labels.find((l: any) => l.name === label)

  if (!giteaLabel) {
    yield put({ type: REMOVE_LABEL_FAILURE, error: new Error(`Label "${label}" not found !`) });
    return;
  }

  try {
    yield retry(5, 250, gitea.removeIssueLabel.bind(gitea), project, issueNumber, giteaLabel.id);
  } catch(error) {
    yield put({ type: REMOVE_LABEL_FAILURE, error });
    return;
  }
  

  yield put({ type: REMOVE_LABEL_SUCCESS, project, issueNumber, label });
}

export function* createIssueSaga(action: any) {
  const { project, title, label, body } = action;
  const labels = yield call(gitea.fetchProjectLabels.bind(gitea), project);
  const giteaLabel = labels.find((l: any) => l.name === label)

  if (!giteaLabel) {
    yield put({ type: CREATE_ISSUE_FAILURE, error: new Error(`Label "${label}" not found !`) });
    return;
  }

  let issue;
  try {
    issue = yield call(gitea.createIssue.bind(gitea), project, title, body, giteaLabel.id);
  } catch(error) {
    yield put({ type: CREATE_ISSUE_FAILURE, error });
    return;
  }
  

  yield put({ type: CREATE_ISSUE_SUCCESS, project, title, label, body, issue });
}