interface SearchOptions {
  jql: string;
  startAt?: number;
  maxResults?: number;
  fields?: string[];
  expand?: string[];
}

interface SearchResponse {
  startAt: number;
  maxResults: number;
  total: number;
  issues: JiraIssue[];
}

async function searchIssues(
  client: JiraClient,
  options: SearchOptions
): Promise<SearchResponse> {
  return client.request<SearchResponse>('/search', {
    method: 'POST',
    body: JSON.stringify({
      jql: options.jql,
      startAt: options.startAt ?? 0,
      maxResults: options.maxResults ?? 50,
      fields: options.fields ?? ['key', 'summary', 'status', 'assignee', 'created'],
      expand: options.expand,
    }),
  });
}

async function searchAllIssues(
  client: JiraClient,
  jql: string,
  fields: string[] = ['key', 'summary', 'status']
): Promise<JiraIssue[]> {
  const allIssues: JiraIssue[] = [];
  let startAt = 0;
  const maxResults = 100;

  while (true) {
    const response = await searchIssues(client, {
      jql,
      startAt,
      maxResults,
      fields,
    });

    allIssues.push(...response.issues);

    if (startAt + response.issues.length >= response.total) {
      break;
    }

    startAt += maxResults;
  }

  return allIssues;
}

// Search by project
function searchByProject(projectKey: string): string {
  return `project = ${projectKey}`;
}

// Search by status
function searchByStatus(status: string | string[]): string {
  if (Array.isArray(status)) {
    return `status IN (${status.map(s => `'${s}'`).join(', ')})`;
  }
  return `status = '${status}'`;
}

// Search by assignee
function searchByAssignee(accountId: string): string {
  return `assignee = '${accountId}'`;
}

// Search my issues
function searchMyIssues(): string {
  return `assignee = currentUser()`;
}

// Search by date range
function searchByCreatedDate(daysAgo: number): string {
  return `created >= -${daysAgo}d`;
}

// Combine conditions
function combineJql(...conditions: string[]): string {
  return conditions.join(' AND ');
}

// Find all open issues in project
async function findOpenIssues(client: JiraClient, projectKey: string) {
  return searchAllIssues(
    client,
    combineJql(
      searchByProject(projectKey),
      `status NOT IN (Done, Closed)`
    )
  );
}

// Find my recent issues
async function findMyRecentIssues(client: JiraClient, daysAgo: number = 7) {
  return searchAllIssues(
    client,
    combineJql(
      searchMyIssues(),
      searchByCreatedDate(daysAgo)
    )
  );
}

// Find issues by label
async function findByLabel(client: JiraClient, projectKey: string, label: string) {
  return searchAllIssues(
    client,
    combineJql(
      searchByProject(projectKey),
      `labels = '${label}'`
    )
  );
}

// Find unassigned issues
async function findUnassigned(client: JiraClient, projectKey: string) {
  return searchAllIssues(
    client,
    combineJql(
      searchByProject(projectKey),
      `assignee IS EMPTY`
    )
  );
}

undefined

undefined

curl -X POST "$JIRA_BASE_URL/rest/api/3/search" \
  -H "Authorization: Basic $(echo -n 'email:token' | base64)" \
  -H "Content-Type: application/json" \
  -d '{
    "jql": "project = SCRUM AND status != Done",
    "startAt": 0,
    "maxResults": 50,
    "fields": ["key", "summary", "status", "assignee"]
  }'

curl -X POST "$JIRA_BASE_URL/rest/api/3/search" \
  -H "Authorization: Basic $(echo -n 'email:token' | base64)" \
  -H "Content-Type: application/json" \
  -d '{
    "jql": "project = SCRUM",
    "startAt": 50,
    "maxResults": 50,
    "fields": ["key", "summary"]
  }'

curl -X POST "$JIRA_BASE_URL/rest/api/3/search" \
  -H "Authorization: Basic $(echo -n 'email:token' | base64)" \
  -H "Content-Type: application/json" \
  -d '{
    "jql": "project = SCRUM AND updated >= -7d",
    "maxResults": 50,
    "fields": ["key", "summary", "status"],
    "expand": ["changelog"]
  }'

{
  "startAt": 0,
  "maxResults": 50,
  "total": 150,
  "issues": [
    {
      "id": "10001",
      "key": "SCRUM-1",
      "self": "$JIRA_BASE_URL/rest/api/3/issue/10001",
      "fields": {
        "summary": "Issue summary",
        "status": { "name": "To Do" },
        "assignee": { "displayName": "John Doe" }
      }
    }
  ]
}

Total pages = ceil(total / maxResults)
Current page = floor(startAt / maxResults) + 1
Has more = (startAt + issues.length) < total
Next startAt = startAt + maxResults