name: Comment Artifacts on PR

on:
  workflow_run:
    workflows: [ "Android CI" ]
    types: [ completed ]

permissions:
  pull-requests: write
  contents: read

concurrency:
  group: comment-${{ github.event.workflow_run.id }}
  cancel-in-progress: true

jobs:
  comment:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request' }}
    steps:
      - name: Download and process artifacts
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');
            const runId = context.payload.workflow_run.id;

            const allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: runId,
            });

            const prNumberArtifact = allArtifacts.data.artifacts.find(artifact => artifact.name === "pr_number");
            if (!prNumberArtifact) {
              console.log("pr_number artifact not found.");
              return;
            }

            const download = await github.rest.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: prNumberArtifact.id,
              archive_format: 'zip',
            });

            fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/pr_number.zip`, Buffer.from(download.data));
            const { execSync } = require('child_process');
            execSync('unzip -q pr_number.zip -d ./pr_number/');
            fs.unlinkSync('pr_number.zip');

            const prData = JSON.parse(fs.readFileSync('./pr_number/pr_number.json', 'utf8'));
            const prNumber = prData.pr_number;

            if (!prNumber || prNumber === 'null') {
              console.log("No valid PR number found in pr_number.json. Skipping.");
              return;
            }

            const artifactsToLink = allArtifacts.data.artifacts.filter(artifact => artifact.name !== "pr_number");
            if (artifactsToLink.length === 0) {
              console.log("No artifacts to link found.");
              return;
            }

            const comments = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: Number(prNumber),
            });
            
            const oldComments = comments.data.filter(comment => 
              comment.body.startsWith("✅ Generated APK variants!")
            );
            for (const comment of oldComments) {
              await github.rest.issues.deleteComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: comment.id,
              });
              console.log(`Deleted old comment ID: ${comment.id}`);
            };
            
            const commentBody = `✅ Generated APK variants!\n` + 
            artifactsToLink.map(artifact => {
                const artifactUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${runId}/artifacts/${artifact.id}`;
                return `- 🤖 [Download ${artifact.name}](${artifactUrl})`;
            }).join('\n');

            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: Number(prNumber),
              body: commentBody
            });