name: Distribution

on:
  # Used when nigthly builds needs to be refreshed or
  # a tag should be added to main components
  workflow_dispatch:
    inputs:
      refresh:
        description: "Trigger a rebuild of today's nightly builds"
        required: false
        type: boolean
        default: false
      tag:
        description: "Tag to build and add to the main components"
        required: false
        type: string
      force:
        description: "Build both main and nightly components, ignoring commit checks"
        required: false
        type: boolean
        default: false

  # Used when publishing the release as main components
  release:
    types: [published]

  # Used to build nightly releases
  schedule:
    - cron: "0 0 * * *" # Every day at midnight

# Only one distribution workflow can run at a time
concurrency:
  group: "distribution"
  cancel-in-progress: false

env:
  DEBIAN_FRONTEND: noninteractive

jobs:
  prepare:
    runs-on: ubuntu-latest
    outputs:
      types: ${{ steps.set-types.outputs.types }}
      main-tag: ${{ steps.decide-main-tag.outputs.tag }}
    steps:
      - name: Check workflow inputs
        if: ${{ github.event_name == 'workflow_dispatch' }}
        run: |
          if [ "${{ github.event.inputs.force }}" = "false" ] && [ -z "${{ github.event.inputs.tag }}" ] && [ "${{ github.event.inputs.refresh }}" = "false" ]; then
            echo "Error: 'tag' input must be provided when 'force' and 'refresh' are both false."
            exit 1
          fi

      - name: Get cached commit
        id: get-latest-commit
        uses: actions/cache@v4
        with:
          path: ${{ runner.temp }}/gpac-latest-commit.txt
          key: gpac-latest-commit-${{ github.sha }}
          restore-keys: |
            gpac-latest-commit-

      - name: Get latest gpac commit
        id: git-status
        run: |
          LATEST_COMMIT=$(git ls-remote --refs https://github.com/gpac/gpac.git refs/heads/master | awk '{print $1}')
          echo $LATEST_COMMIT > ${{ runner.temp }}/gpac-latest-commit.txt
          echo "has_new_commits=$(if [ "${{ steps.get-latest-commit.outputs.cache-hit }}" = "false" ]; then echo "true"; else echo "false"; fi)" >> $GITHUB_OUTPUT

      - name: Set types
        id: set-types
        run: |
          types=()
          # Add "main" type if:
          # - release event
          # - manual tag input
          # - force input is true
          if { 
            [[ "${{ github.event_name }}" == "release" ]] || 
            [[ -n "${{ github.event.inputs.tag }}" ]] || 
            [[ "${{ github.event.inputs.force }}" == "true" ]]; 
          }; then
            types+=("\"main\"")
          fi

          # Add "nightly" type if:
          # - scheduled run and had new commits since last run
          # - manual refresh and had new commits since last run
          # - force input is true
          has_new_commits="${{ steps.git-status.outputs.has_new_commits }}"
          if { 
            [[ "${{ github.event_name }}" == "schedule" && "$has_new_commits" == "true" ]] ||
            [[ "${{ github.event.inputs.refresh }}" == "true" && "$has_new_commits" == "true" ]] ||
            [[ "${{ github.event.inputs.force }}" == "true" ]]; 
          }; then
            types+=("\"nightly\"")
          fi
          echo "types=[$(IFS=,; echo "${types[*]}")]" >> $GITHUB_OUTPUT

      - name: Decide main tag
        id: decide-main-tag
        run: |
          if [[ "${{ github.event_name }}" == "release" ]]; then
            echo "tag=${{ github.event.release.tag_name }}" >> $GITHUB_OUTPUT
          elif [[ -n "${{ github.event.inputs.tag }}" ]]; then
            echo "tag=${{ github.event.inputs.tag }}" >> $GITHUB_OUTPUT
          else
            # Get the latest v* tag from gpac/gpac repo
            LATEST_TAG=$(git ls-remote --tags https://github.com/gpac/gpac.git | awk -F/ '/refs\/tags\/v[0-9]/{print $3}' | sort -V | tail -n1)
            if [ -z "$LATEST_TAG" ]; then
              echo "Error: No v* tag found in gpac/gpac repository."
              exit 1
            else
              echo "tag=$LATEST_TAG" >> $GITHUB_OUTPUT
            fi
          fi

      - name: Workflow summary
        run: |
          echo "## Distribution Workflow Summary" >> $GITHUB_STEP_SUMMARY
          echo "### Latest GPAC Commit" >> $GITHUB_STEP_SUMMARY
          echo "$(cat ${{ runner.temp }}/gpac-latest-commit.txt)" >> $GITHUB_STEP_SUMMARY
          echo "### New Commits Detected" >> $GITHUB_STEP_SUMMARY
          if [ "${{ steps.git-status.outputs.has_new_commits }}" = "true" ]; then
            echo "Yes" >> $GITHUB_STEP_SUMMARY
          else
            echo "No" >> $GITHUB_STEP_SUMMARY
          fi
          echo "### Inputs" >> $GITHUB_STEP_SUMMARY
          echo "- Tag: ${{ github.event.inputs.tag }}" >> $GITHUB_STEP_SUMMARY
          echo "- Force: ${{ github.event.inputs.force }}" >> $GITHUB_STEP_SUMMARY
          echo "- Refresh Nightly: ${{ github.event.inputs.refresh }}" >> $GITHUB_STEP_SUMMARY
          echo "### Types to Build" >> $GITHUB_STEP_SUMMARY
          if [ "${{ steps.set-types.outputs.types }}" = "[]" ]; then
            echo "No types to build." >> $GITHUB_STEP_SUMMARY
          else
            echo '${{ steps.set-types.outputs.types }}' | jq -r '.[]' | while read -r type; do
              echo "- $type" >> $GITHUB_STEP_SUMMARY
            done
          fi
          echo "### Main Tag" >> $GITHUB_STEP_SUMMARY
          echo "${{ steps.decide-main-tag.outputs.tag }}" >> $GITHUB_STEP_SUMMARY

  dist-linux:
    strategy:
      matrix:
        type: ${{ fromJson(needs.prepare.outputs.types) }}

    name: Build Linux (${{ matrix.type || 'unknown' }})
    needs: prepare
    if: ${{ needs.prepare.outputs.types != '[]' }}

    uses: ./.github/workflows/dist-linux.yml
    with:
      tag: ${{ matrix.type == 'main' && needs.prepare.outputs.main-tag || 'nightly' }}
    secrets: inherit

  dist-wasm:
    strategy:
      matrix:
        type: ${{ fromJson(needs.prepare.outputs.types) }}
        exclude:
          - type: main # We'll build main on v2.5+

    name: Build WASM (${{ matrix.type || 'unknown' }})
    needs: prepare
    if: ${{ needs.prepare.outputs.types != '[]' }}

    uses: ./.github/workflows/dist-wasm.yml
    with:
      tag: ${{ matrix.type == 'main' && needs.prepare.outputs.main-tag || 'nightly' }}
    secrets: inherit