name: Desktop Rollout

on:
  workflow_dispatch:
    inputs:
      tag:
        description: "Existing release tag to re-stamp (e.g. v0.1.42)."
        required: true
        type: string
      rollout_hours:
        description: "Total rollout duration since the original release date, in hours. Use 0 to admit everyone immediately."
        required: true
        type: string

concurrency:
  group: desktop-rollout-${{ inputs.tag }}
  cancel-in-progress: false

env:
  SOURCE_TAG: ${{ inputs.tag }}

jobs:
  stamp:
    permissions:
      contents: write
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          sparse-checkout: |
            package.json
            package-lock.json
            scripts

      - name: Resolve release metadata
        shell: bash
        run: node scripts/emit-release-env.mjs --source-tag "$SOURCE_TAG" >> "$GITHUB_ENV"

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: "npm"
          cache-dependency-path: package-lock.json
          registry-url: "https://npm.pkg.github.com"
          scope: "@boudra"

      - name: Install JS dependencies
        run: node scripts/npm-retry.mjs ci
        env:
          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Download release manifests
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        shell: bash
        run: |
          set -euo pipefail
          mkdir release-manifests
          cd release-manifests
          gh release download "$RELEASE_TAG" --repo "${{ github.repository }}" --pattern "${RELEASE_CHANNEL}*.yml"
          shopt -s nullglob
          files=( ./*.yml )
          if (( ${#files[@]} == 0 )); then
            echo "::error::No manifests matched ${RELEASE_CHANNEL}*.yml on $RELEASE_TAG"
            exit 1
          fi
          echo "Downloaded ${#files[@]} manifest(s):"
          printf '  %s\n' "${files[@]}"

      - name: Capture before state
        id: before
        shell: bash
        run: |
          set -euo pipefail
          cd release-manifests
          summary=$(node -e '
            const yaml = require("js-yaml");
            const fs = require("fs");
            for (const f of process.argv.slice(1)) {
              const m = yaml.load(fs.readFileSync(f, "utf8")) ?? {};
              console.log(`  ${f}: rolloutHours=${m.rolloutHours ?? "<unset>"} releaseDate=${m.releaseDate ?? "<unset>"}`);
            }
          ' ./*.yml)
          echo "$summary"
          {
            echo "summary<<EOF"
            echo "$summary"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Re-stamp rolloutHours
        env:
          NEW_HOURS: ${{ inputs.rollout_hours }}
        shell: bash
        run: |
          set -euo pipefail
          cd release-manifests
          node ../scripts/stamp-rollout.mjs --rollout-hours "$NEW_HOURS" ./*.yml

      - name: Validate rewritten manifests
        env:
          EXPECTED: ${{ inputs.rollout_hours }}
        shell: bash
        run: |
          set -euo pipefail
          cd release-manifests
          node -e '
            const yaml = require("js-yaml");
            const fs = require("fs");
            const expected = Number(process.env.EXPECTED);
            if (!Number.isFinite(expected) || expected < 0) {
              throw new Error(`EXPECTED must be a non-negative number, got ${process.env.EXPECTED}`);
            }
            for (const f of process.argv.slice(1)) {
              const m = yaml.load(fs.readFileSync(f, "utf8")) ?? {};
              if (m.rolloutHours !== expected) {
                throw new Error(`${f}: rolloutHours=${m.rolloutHours}, expected ${expected}`);
              }
              if (typeof m.version !== "string" || m.version.length === 0) {
                throw new Error(`${f}: missing or invalid version`);
              }
            }
          ' ./*.yml

      - name: Upload to release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        shell: bash
        run: |
          set -euo pipefail
          cd release-manifests
          gh release upload "$RELEASE_TAG" ./*.yml --clobber --repo "${{ github.repository }}"

      - name: Write summary
        env:
          BEFORE: ${{ steps.before.outputs.summary }}
        shell: bash
        run: |
          {
            echo "## Rollout updated"
            echo ""
            echo "**Tag:** \`$RELEASE_TAG\`"
            echo "**Channel:** \`$RELEASE_CHANNEL\`"
            echo "**New rolloutHours:** \`${{ inputs.rollout_hours }}\`"
            echo ""
            echo "### Before"
            echo '```'
            echo "$BEFORE"
            echo '```'
          } >> "$GITHUB_STEP_SUMMARY"