name: 'Grasp issue dependencies'
description: 'Help project managers and project owners with easy-to-understand views of github issue dependencies.'

inputs:
  label:
    description: 'Analyze the issue with the specified label'
    required: true
  github_token:
    description: 'GitHub Access Token'
    required: true

runs:
  using: "composite"
  steps:
    - uses: actions/cache@v3
      with:
        path: |
          ~/.cargo/bin/
          ~/.cargo/registry/index/
          ~/.cargo/registry/cache/
          ~/.cargo/git/db/
          target/
        key: ${{ runner.os }}-cargo-${{ hashFiles('~/.cargo/bin/gid') }}-0.1.3

    - name: Install gid
      shell: bash
      run: |
        cargo -vV
        cargo install --version 0.1.3 gid_cli || true

    - uses: actions/github-script@v6
      env:
        LABEL: '${{ inputs.label }}'
        GITHUB_ACCESS_TOKEN: ${{ inputs.github_token }}
      with:
        script: |
          const query = `
          query ($owner: String!, $name: String!, $label: String!) {
            repository(owner: $owner, name: $name) {
              issues(first: 100, labels: [$label], states: OPEN) {
                nodes {
                  number
                }
              }
            }
          }`;
          const {LABEL} = process.env
          const variables = {
            owner: context.repo.owner,
            name: context.repo.repo,
            label: LABEL
          }
          const result = await github.graphql(query, variables)

          for (const issue of result.repository.issues.nodes) {
            const query = `
            query ($owner: String!, $name: String!, $number: Int!) {
              repository(owner: $owner, name: $name) {
                issue(number: $number) {
                  comments(first: 100) {
                    nodes {
                      databaseId
                      body
                    }
                  }
                }
              }
            }`;

            const variables = {
              owner: context.repo.owner,
              name: context.repo.repo,
              number: issue.number
            }

            const result = await github.graphql(query, variables)
            let id = null;
            for (const comment of result.repository.issue.comments.nodes) {
              if(comment.body.includes("/generate_gid")) {
                id = comment.databaseId
              }
            }

            const { exec } = require("child_process");
            const command = `gid -o ${context.repo.owner} -r ${context.repo.repo} -i ${issue.number}`
            exec(command, (error, stdout, stderr) => {
              if (error) {
                  console.log(`error: ${error.message}`);
                  return;
              }
              if (stderr) {
                  console.log(`stderr: ${stderr}`);
                  return;
              }
              const mermaid = `${stdout}`;

              if (id === null) {
                console.log("add new comment", mermaid);
                github.rest.issues.createComment({
                  issue_number: issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  body: `/generate_gid\n${mermaid}`
                })
              } else {
                console.log("update comment", mermaid);
                github.rest.issues.updateComment({
                  comment_id: id,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  body: `/generate_gid\n${mermaid}`
                })
              }
            });
          }