name: Build Boards

on:
  push:
    branches:
      - main
      - ci/* # for ci test
  pull_request:
    branches:
      - main

permissions:
  contents: read

jobs:
  prepare:
    name: Determine variants to build
    runs-on: ubuntu-latest
    outputs:
      variants: ${{ steps.select.outputs.variants }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install jq
        run: sudo apt-get update && sudo apt-get install -y jq

      - id: list
        name: Get all variant list
        run: |
          echo "all_variants=$(python scripts/release.py --list-boards --json)" >> $GITHUB_OUTPUT

      - id: select
        name: Select variants based on changes
        env:
          ALL_VARIANTS: ${{ steps.list.outputs.all_variants }}
        run: |
          EVENT_NAME="${{ github.event_name }}"

          # push 到 main 分支，编译全部变体
          if [[ "$EVENT_NAME" == "push" ]]; then
            echo "variants=$ALL_VARIANTS" >> $GITHUB_OUTPUT
            exit 0
          fi

          # pull_request 场景
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          HEAD_SHA="${{ github.event.pull_request.head.sha }}"
          echo "Base: $BASE_SHA, Head: $HEAD_SHA"

          CHANGED=$(git diff --name-only $BASE_SHA $HEAD_SHA || true)
          echo -e "Changed files:\n$CHANGED"

          NEED_ALL=0
          declare -A AFFECTED
          while IFS= read -r file; do
            if [[ "$file" == main/* && "$file" != main/boards/* ]]; then
              NEED_ALL=1
            fi

            if [[ "$file" == main/boards/common/* ]]; then
              NEED_ALL=1
            fi

            if [[ "$file" == main/boards/* ]]; then
              board=$(echo "$file" | cut -d '/' -f3)
              AFFECTED[$board]=1
            fi
          done <<< "$CHANGED"

          if [[ "$NEED_ALL" -eq 1 ]]; then
            echo "variants=$ALL_VARIANTS" >> $GITHUB_OUTPUT
          else
            if [[ ${#AFFECTED[@]} -eq 0 ]]; then
              echo "variants=[]" >> $GITHUB_OUTPUT
            else
              BOARDS_JSON=$(printf '%s\n' "${!AFFECTED[@]}" | sort -u | jq -R -s -c 'split("\n")[:-1]')
              FILTERED=$(echo "$ALL_VARIANTS" | jq -c --argjson boards "$BOARDS_JSON" 'map(select(.board as $b | $boards | index($b)))')
              echo "variants=$FILTERED" >> $GITHUB_OUTPUT
            fi
          fi

  build:
    name: Build ${{ matrix.name }}
    needs: prepare
    if: ${{ needs.prepare.outputs.variants != '[]' }}
    strategy:
      fail-fast: false  # 单个变体失败不影响其它变体
      matrix:
        include: ${{ fromJson(needs.prepare.outputs.variants) }}
    runs-on: ubuntu-latest
    container:
      image: espressif/idf:release-v5.5
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Build current variant
        shell: bash
        run: |
          source $IDF_PATH/export.sh
          python scripts/release.py ${{ matrix.board }} --name ${{ matrix.name }}

      - name: Upload artifacts
        uses: actions/upload-artifact@v4
        with:
          name: xiaozhi_${{ matrix.name }}_${{ github.sha }}.bin
          path: build/merged-binary.bin
          if-no-files-found: error