# GraphQL operations for the issue-triage bot. genqlient turns each of these
# into a type-safe Go function in generated.go (package github).
# Regenerate with: go generate ./...

# --- issues: read ---

# IssueByNumber fetches everything the pipeline needs in one round-trip:
# the node id (required as a mutation subjectId / id), title, body, url and state.
query IssueByNumber($owner: String!, $repo: String!, $number: Int!) {
  repository(owner: $owner, name: $repo) {
    issue(number: $number) {
      id
      number
      title
      body
      url
      state
    }
  }
}

# IssueComments pages an issue's comments so the sync adapter can scan for its
# idempotency marker before posting. Pass a nil $after for the first page, then
# pageInfo.endCursor while pageInfo.hasNextPage.
query IssueComments(
  $owner: String!,
  $repo: String!,
  $number: Int!,
  # @genqlient(pointer: true, omitempty: true)
  $after: String,
) {
  repository(owner: $owner, name: $repo) {
    issue(number: $number) {
      comments(first: 100, after: $after) {
        nodes {
          body
        }
        pageInfo {
          hasNextPage
          endCursor
        }
      }
    }
  }
}

# --- issues: write ---

# AddIssueComment posts a comment on an issue (subjectId is the issue node id).
mutation AddIssueComment($subjectId: ID!, $body: String!) {
  addComment(input: {subjectId: $subjectId, body: $body}) {
    commentEdge {
      node {
        id
        url
      }
    }
  }
}

# UpdateIssue edits an issue's title/body/state. The optional inputs are
# pointers with omitempty so a nil leaves that field untouched server-side; a
# non-nil value (including "") is sent and applied.
mutation UpdateIssue(
  $id: ID!,
  # @genqlient(pointer: true, omitempty: true)
  $title: String,
  # @genqlient(pointer: true, omitempty: true)
  $body: String,
  # @genqlient(pointer: true, omitempty: true)
  $state: IssueState,
) {
  updateIssue(input: {id: $id, title: $title, body: $body, state: $state}) {
    issue {
      number
      title
      state
      url
    }
  }
}

# --- projects (v2): type-safe helpers ---

# ProjectSingleSelectField resolves a project's node id plus a single-select
# field's id and its option ids, which SetProjectFieldValue requires.
query ProjectSingleSelectField($org: String!, $number: Int!, $field: String!) {
  organization(login: $org) {
    projectV2(number: $number) {
      id
      field(name: $field) {
        ... on ProjectV2SingleSelectField {
          id
          options {
            id
            name
          }
        }
      }
    }
  }
}

# AddProjectItem adds an issue or pull request (by node id) to a project.
mutation AddProjectItem($projectId: ID!, $contentId: ID!) {
  addProjectV2ItemById(input: {projectId: $projectId, contentId: $contentId}) {
    item {
      id
    }
  }
}

# SetProjectFieldValue sets one field on a project item. Populate exactly one
# member of $value (text, number, date, singleSelectOptionId or iterationId).
mutation SetProjectFieldValue($projectId: ID!, $itemId: ID!, $fieldId: ID!, $value: ProjectV2FieldValue!) {
  updateProjectV2ItemFieldValue(
    input: {projectId: $projectId, itemId: $itemId, fieldId: $fieldId, value: $value}
  ) {
    projectV2Item {
      id
    }
  }
}