name: Discover apps reusable workflow

on:
  workflow_call:
    inputs:
      scope:
        description: 'App roots to scan: "public" or "internal-and-public".'
        required: false
        type: string
        default: internal-and-public
      changed-only:
        description: 'Only include apps changed in this PR, else every app in scope.'
        required: false
        type: boolean
        default: true
      application:
        description: 'workflow_dispatch: restrict to a single app folder name.'
        required: false
        type: string
        default: ''
    outputs:
      matrix:
        value: ${{ jobs.discover.outputs.matrix }}
      has_apps:
        value: ${{ jobs.discover.outputs.has_apps }}

permissions:
  contents: read

jobs:
  discover:
    timeout-minutes: 5
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
      has_apps: ${{ steps.set-matrix.outputs.has_apps }}
    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
        with:
          fetch-depth: ${{ inputs.changed-only && '0' || '1' }}

      - name: Ensure no .github folder inside app folders
        run: |
          offenders=$(find packages/twenty-apps/internal packages/twenty-apps/public -mindepth 2 -maxdepth 2 -type d -name .github)
          if [ -n "$offenders" ]; then
            echo "::error::Apps must not define their own .github folder. Offenders:"
            echo "$offenders"
            exit 1
          fi

      - name: Detect changed files
        id: changed-files
        if: inputs.changed-only && github.event_name != 'workflow_dispatch'
        uses: tj-actions/changed-files@48d8f15b2aaa3d255ca5af3eba4870f807ce6b3c # v45.0.9
        with:
          json: true
          escape_json: false
          files: |
            packages/twenty-apps/internal/**
            packages/twenty-apps/public/**

      - name: Build matrix of apps
        id: set-matrix
        env:
          SCOPE: ${{ inputs.scope }}
          CHANGED_ONLY: ${{ inputs.changed-only }}
          EVENT_NAME: ${{ github.event_name }}
          CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
          APPLICATION_INPUT: ${{ inputs.application }}
        run: |
          node <<'NODE'
          const fs = require('fs');
          const path = require('path');
          const changedOnly = process.env.CHANGED_ONLY === 'true';
          const roots = process.env.SCOPE === 'public'
            ? ['packages/twenty-apps/public']
            : ['packages/twenty-apps/internal', 'packages/twenty-apps/public'];
          const eventName = process.env.EVENT_NAME;
          const changedFiles = JSON.parse(process.env.CHANGED_FILES || '[]');
          const changedApps = new Set();
          for (const file of changedFiles) {
            const match = file.match(/^packages\/twenty-apps\/(?:internal|public)\/([^/]+)\//);
            if (match) changedApps.add(match[1]);
          }
          const requestedApp = (process.env.APPLICATION_INPUT || '').trim();
          const matrix = roots
            .filter((root) => fs.existsSync(root))
            .flatMap((root) =>
              fs.readdirSync(root, { withFileTypes: true })
                .filter((entry) => entry.isDirectory() && entry.name !== 'node_modules')
                .map((entry) => entry.name)
                .filter((name) => fs.existsSync(path.join(root, name, 'package.json')))
                .filter((name) => {
                  if (!changedOnly) return true;
                  if (eventName === 'workflow_dispatch') {
                    return requestedApp ? name === requestedApp : true;
                  }
                  return changedApps.has(name);
                })
                .map((name) => {
                  const appPath = path.join(root, name);
                  const scripts = JSON.parse(fs.readFileSync(path.join(appPath, 'package.json'), 'utf8')).scripts || {};
                  return {
                    name,
                    path: appPath,
                    hasTypecheck: Boolean(scripts.typecheck),
                    hasUnit: Boolean(scripts['test:unit']),
                    hasIntegration: Boolean(scripts.test),
                  };
                })
            );
          if (changedOnly && eventName === 'workflow_dispatch' && requestedApp && matrix.length === 0) {
            console.error(`::error::Requested app "${requestedApp}" was not found under ${roots.join(', ')}`);
            process.exit(1);
          }
          fs.appendFileSync(process.env.GITHUB_OUTPUT, `matrix=${JSON.stringify(matrix)}\n`);
          fs.appendFileSync(process.env.GITHUB_OUTPUT, `has_apps=${matrix.length > 0}\n`);
          NODE