# For duplicate issues, ensure the close type is right (not planned), update it if not
# For all closed (completed) issues, cascade the closure onto any referenced rageshakes
# For all closed (not planned) issues, comment on rageshakes to move them into the canonical issue if one exists
on:
    issues:
        types: [closed]
jobs:
    tidy:
        name: Tidy closed issues
        runs-on: ubuntu-latest
        steps:
            - uses: actions/github-script@v6
              id: main
              with:
                  # PAT needed as the GITHUB_TOKEN won't be able to see cross-references from other orgs (matrix-org)
                  github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}
                  script: |
                      const variables = {
                        owner: context.repo.owner,
                        name: context.repo.repo,
                        number: context.issue.number,
                      };

                      const query = `query($owner:String!, $name:String!, $number:Int!) {
                        repository(owner: $owner, name: $name) {
                          issue(number: $number) {
                            stateReason,
                            timelineItems(first: 100, itemTypes: [MARKED_AS_DUPLICATE_EVENT, UNMARKED_AS_DUPLICATE_EVENT, CROSS_REFERENCED_EVENT]) {
                              edges {
                                node {
                                  __typename
                                  ... on MarkedAsDuplicateEvent {
                                    canonical {
                                      ... on Issue {
                                        repository {
                                          nameWithOwner
                                        }
                                        number
                                      }
                                      ... on PullRequest {
                                        repository {
                                          nameWithOwner
                                        }
                                        number
                                      }
                                    }
                                  }
                                  ... on UnmarkedAsDuplicateEvent {
                                    canonical {
                                      ... on Issue {
                                        repository {
                                          nameWithOwner
                                        }
                                        number
                                      }
                                      ... on PullRequest {
                                        repository {
                                          nameWithOwner
                                        }
                                        number
                                      }
                                    }
                                  }
                                  ... on CrossReferencedEvent {
                                    source {
                                      ... on Issue {
                                        repository {
                                          nameWithOwner
                                        }
                                        number
                                      }
                                      ... on PullRequest {
                                        repository {
                                          nameWithOwner
                                        }
                                        number
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }`;

                      const result = await github.graphql(query, variables);
                      const { stateReason, timelineItems: { edges } } = result.repository.issue;

                      const RAGESHAKE_OWNER = "matrix-org";
                      const RAGESHAKE_REPO = "element-web-rageshakes";
                      const rageshakes = new Set();
                      const duplicateOf = new Set();

                      console.log("Edges: ", JSON.stringify(edges));

                      for (const { node } of edges) {
                        switch(node.__typename) {
                          case "MarkedAsDuplicateEvent":
                            duplicateOf.add(node.canonical.repository.nameWithOwner + "#" + node.canonical.number);
                            break;
                          case "UnmarkedAsDuplicateEvent":
                            duplicateOf.remove(node.canonical.repository.nameWithOwner + "#" + node.canonical.number);
                            break;
                          case "CrossReferencedEvent":
                            if (node.source.repository.nameWithOwner === (RAGESHAKE_OWNER + "/" + RAGESHAKE_REPO)) {
                              rageshakes.add(node.source.number);
                            }
                            break;
                        }
                      }

                      console.log("Duplicate of: ", duplicateOf);
                      console.log("Found rageshakes: ", rageshakes);

                      if (duplicateOf.size) {
                        const body = Array.from(duplicateOf).join("\n");

                        // Comment on all rageshakes to create relationship to the issue this was closed as duplicate of
                        for (const rageshake of rageshakes) {
                          github.rest.issues.createComment({
                            owner: RAGESHAKE_OWNER,
                            repo: RAGESHAKE_REPO,
                            issue_number: rageshake,
                            body,
                          });
                        }

                        // Duplicate was closed with wrong reason, fix it
                        if (stateReason === "COMPLETED") {
                          core.setOutput("closeAsNotPlanned", "true");
                        }
                      } else {
                        // This issue was closed, close all related rageshakes
                        for (const rageshake of rageshakes) {
                          github.rest.issues.update({
                            owner: RAGESHAKE_OWNER,
                            repo: RAGESHAKE_REPO,
                            issue_number: rageshake,
                            state: "closed",
                          });
                        }
                      }
            - uses: actions/github-script@v6
              name: Close duplicate as Not Planned
              if: steps.main.outputs.closeAsNotPlanned
              with:
                  # We do this step separately, and with the default token so as to not re-trigger this workflow when re-closing
                  script: |
                      await github.graphql(`mutation($id:ID!) {
                        closeIssue(input: { issueId:$id, stateReason:NOT_PLANNED }) {
                          clientMutationId
                        }
                      }`, {
                        id: context.payload.issue.node_id,
                      });