name: Update Nix Hashes

permissions:
  contents: write

on:
  workflow_dispatch:
  push:
    paths:
      - "bun.lock"
      - "package.json"
      - "packages/*/package.json"
  pull_request:
    paths:
      - "bun.lock"
      - "package.json"
      - "packages/*/package.json"

jobs:
  update-flake:
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
    runs-on: blacksmith-4vcpu-ubuntu-2404
    env:
      TITLE: flake.lock

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0
          ref: ${{ github.head_ref || github.ref_name }}
          repository: ${{ github.event.pull_request.head.repo.full_name || github.repository }}

      - name: Setup Nix
        uses: nixbuild/nix-quick-install-action@v34

      - name: Configure git
        run: |
          git config --global user.email "action@github.com"
          git config --global user.name "Github Action"

      - name: Update ${{ env.TITLE }}
        run: |
          set -euo pipefail
          echo "📦 Updating $TITLE..."
          nix flake update
          echo "✅ $TITLE updated successfully"

      - name: Commit ${{ env.TITLE }} changes
        env:
          TARGET_BRANCH: ${{ github.head_ref || github.ref_name }}
        run: |
          set -euo pipefail

          echo "🔍 Checking for changes in tracked files..."

          summarize() {
            local status="$1"
            {
              echo "### Nix $TITLE"
              echo ""
              echo "- ref: ${GITHUB_REF_NAME}"
              echo "- status: ${status}"
            } >> "$GITHUB_STEP_SUMMARY"
            if [ -n "${GITHUB_SERVER_URL:-}" ] && [ -n "${GITHUB_REPOSITORY:-}" ] && [ -n "${GITHUB_RUN_ID:-}" ]; then
              echo "- run: ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}" >> "$GITHUB_STEP_SUMMARY"
            fi
            echo "" >> "$GITHUB_STEP_SUMMARY"
          }
          FILES=(flake.lock flake.nix)
          STATUS="$(git status --short -- "${FILES[@]}" || true)"
          if [ -z "$STATUS" ]; then
            echo "✅ No changes detected."
            summarize "no changes"
            exit 0
          fi

          echo "📝 Changes detected:"
          echo "$STATUS"
          echo "🔗 Staging files..."
          git add "${FILES[@]}"
          echo "💾 Committing changes..."
          git commit -m "Update $TITLE"
          echo "✅ Changes committed"

          BRANCH="${TARGET_BRANCH:-${GITHUB_REF_NAME}}"
          echo "🌳 Pulling latest from branch: $BRANCH"
          git pull --rebase origin "$BRANCH"
          echo "🚀 Pushing changes to branch: $BRANCH"
          git push origin HEAD:"$BRANCH"
          echo "✅ Changes pushed successfully"

          summarize "committed $(git rev-parse --short HEAD)"

  update-node-modules-hash:
    needs: update-flake
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
    strategy:
      fail-fast: false
      matrix:
        include:
          - system: x86_64-linux
            host: blacksmith-4vcpu-ubuntu-2404
          - system: aarch64-linux
            host: blacksmith-4vcpu-ubuntu-2404-arm
          - system: x86_64-darwin
            host: macos-15-intel
          - system: aarch64-darwin
            host: macos-latest
    runs-on: ${{ matrix.host }}
    env:
      SYSTEM: ${{ matrix.system }}
      TITLE: node_modules hash (${{ matrix.system }})

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0
          ref: ${{ github.head_ref || github.ref_name }}
          repository: ${{ github.event.pull_request.head.repo.full_name || github.repository }}

      - name: Setup Nix
        uses: nixbuild/nix-quick-install-action@v34

      - name: Configure git
        run: |
          git config --global user.email "action@github.com"
          git config --global user.name "Github Action"

      - name: Pull latest changes
        env:
          TARGET_BRANCH: ${{ github.head_ref || github.ref_name }}
        run: |
          BRANCH="${TARGET_BRANCH:-${GITHUB_REF_NAME}}"
          git pull origin "$BRANCH"

      - name: Update ${{ env.TITLE }}
        run: |
          set -euo pipefail
          echo "🔄 Updating $TITLE..."
          nix/scripts/update-hashes.sh
          echo "✅ $TITLE updated successfully"

      - name: Commit ${{ env.TITLE }} changes
        env:
          TARGET_BRANCH: ${{ github.head_ref || github.ref_name }}
        run: |
          set -euo pipefail

          echo "🔍 Checking for changes in tracked files..."

          summarize() {
            local status="$1"
            {
              echo "### Nix $TITLE"
              echo ""
              echo "- ref: ${GITHUB_REF_NAME}"
              echo "- status: ${status}"
            } >> "$GITHUB_STEP_SUMMARY"
            if [ -n "${GITHUB_SERVER_URL:-}" ] && [ -n "${GITHUB_REPOSITORY:-}" ] && [ -n "${GITHUB_RUN_ID:-}" ]; then
              echo "- run: ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}" >> "$GITHUB_STEP_SUMMARY"
            fi
            echo "" >> "$GITHUB_STEP_SUMMARY"
          }

          FILES=(nix/hashes.json)
          STATUS="$(git status --short -- "${FILES[@]}" || true)"
          if [ -z "$STATUS" ]; then
            echo "✅ No changes detected."
            summarize "no changes"
            exit 0
          fi

          echo "📝 Changes detected:"
          echo "$STATUS"
          echo "🔗 Staging files..."
          git add "${FILES[@]}"
          echo "💾 Committing changes..."
          git commit -m "Update $TITLE"
          echo "✅ Changes committed"

          BRANCH="${TARGET_BRANCH:-${GITHUB_REF_NAME}}"
          echo "🌳 Pulling latest from branch: $BRANCH"
          git pull --rebase origin "$BRANCH"
          echo "🚀 Pushing changes to branch: $BRANCH"
          git push origin HEAD:"$BRANCH"
          echo "✅ Changes pushed successfully"

          summarize "committed $(git rev-parse --short HEAD)"
