name: build-one
on:
  workflow_dispatch:
    inputs:
      platform:
        description: 'Platform to build (e.g. hi3518ev200_lite_switcam-hs303-v2)'
        required: true
      commit:
        description: 'Builder commit SHA to build (optional; defaults to current branch HEAD). Use this from `git bisect run` or for one-off historic rebuilds.'
        required: false
      firmware_ref:
        description: 'OpenIPC/firmware ref (SHA/tag/branch) to clone — for cross-repo bisect of size/regression issues. Defaults to firmware HEAD.'
        required: false

jobs:
  resolve:
    name: Resolve commit
    runs-on: ubuntu-latest
    outputs:
      ref:       ${{ steps.r.outputs.ref }}
      short_sha: ${{ steps.r.outputs.short_sha }}
      tag_name:  ${{ steps.r.outputs.tag_name }}
    steps:
      - id: r
        run: |
          REF="${{ inputs.commit }}"
          [ -z "$REF" ] && REF="${{ github.sha }}"
          SHORT="$(printf '%s' "$REF" | cut -c1-7)"
          if [ -n "${{ inputs.commit }}" ]; then
            TAG="nightly-bisect-${SHORT}"
          else
            TAG="nightly-bisect-${SHORT}-$(date -u +%Y%m%d%H%M%S)"
          fi
          echo "ref=$REF"               >> "$GITHUB_OUTPUT"
          echo "short_sha=$SHORT"       >> "$GITHUB_OUTPUT"
          echo "tag_name=$TAG"          >> "$GITHUB_OUTPUT"
          echo "Building ${{ inputs.platform }} at $REF -> release tag $TAG"

  buildroot:
    name: Firmware (${{inputs.platform}})
    needs: resolve
    runs-on: ubuntu-latest

    steps:
      - name: Checkout source
        uses: actions/checkout@v4
        with:
          ref: ${{ needs.resolve.outputs.ref }}

      - name: Prepare firmware
        run: |
          echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf
          echo CACHE_DATE=$(date +%m) >> ${GITHUB_ENV}

      - name: Setup ccache
        uses: actions/cache@v4
        with:
          path: /tmp/ccache
          key: ${{inputs.platform}}-${{env.CACHE_DATE}}

      # See master.yml for the rationale — builder.sh rm -rf's openipc/
      # every run, so dl/ has to live outside via BR2_DL_DIR.
      - name: Setup dl cache
        uses: actions/cache@v4
        with:
          path: /tmp/builder-dl
          key: builder-dl-${{env.CACHE_DATE}}
          restore-keys: builder-dl-

      - name: Refresh moving-ref package downloads
        run: |
          # The monthly builder-dl cache freezes moving-ref downloads under a constant
          # filename, so buildroot keeps reusing a stale tarball. Drop them so it
          # re-fetches the current ref each run. See master.yml for the rationale.
          # Covers both the dash form (<pkg>-<ref>.tar.gz, e.g. majestic-webui-dist) and
          # the dot form (<pkg>.<ref>.tar.bz2, e.g. majestic.t31.lite.master from S3 —
          # a moving build with no .hash, NOT a content-addressed pin).
          find /tmp/builder-dl -type f -regextype posix-extended \
            -regex '.*[-.](HEAD|master|main|dist)\.tar\.(gz|bz2|xz)' \
            -print -delete 2>/dev/null || true

      - name: Build firmware
        env:
          BUILD_ID:       ${{ needs.resolve.outputs.tag_name }}
          BUILD_SHA:      ${{ needs.resolve.outputs.ref }}
          BUILD_PLATFORM: ${{ inputs.platform }}
          OPENIPC_FW_REV: ${{ inputs.firmware_ref }}
        run: |
          export GIT_HASH=$(git rev-parse --short ${GITHUB_SHA})
          export GIT_BRANCH=${GITHUB_REF_NAME}
          echo GIT_HASH=${GIT_HASH} >> ${GITHUB_ENV}
          echo GIT_BRANCH=${GIT_BRANCH} >> ${GITHUB_ENV}

          mkdir -p /tmp/ccache
          ln -s /tmp/ccache ${HOME}/.ccache

          mkdir -p /tmp/builder-dl
          export BR2_DL_DIR=/tmp/builder-dl

          NAME=${{inputs.platform}}
          # Retry budget for transient upstream toolchain/CDN flakes
          # (matches master.yml + OpenIPC/firmware/build-one.yml).
          backoffs="30 60 120 300 600 1200"
          attempt=1
          for sleep_for in $backoffs ""; do
            bash builder.sh ${NAME} && break
            if [ -z "$sleep_for" ]; then
              echo "::error::build failed after ${attempt} attempts"
              exit 1
            fi
            echo "::warning::attempt ${attempt} failed, retrying after ${sleep_for}s"
            sleep "$sleep_for"
            attempt=$((attempt + 1))
          done
          cd openipc

          TIME=$(date -d @${SECONDS} +%M:%S)
          echo TIME=${TIME} >> ${GITHUB_ENV}
          COMMON=$(echo ${NAME} | awk -F_ '{print NF-1}')

          NORFW=$(find output/images -name openipc*nor*)
          if [ ! -z ${NORFW} ]; then
            if [ ${COMMON} -eq 1 ]; then
              echo NORFW=openipc/${NORFW} >> ${GITHUB_ENV}
            else
              mv ${NORFW} ../${NAME}-nor.tgz
              echo NORFW=${NAME}-nor.tgz >> ${GITHUB_ENV}
            fi
          fi

          NANDFW=$(find output/images -name openipc*nand*)
          if [ ! -z ${NANDFW} ]; then
            if [ ${COMMON} -eq 1 ]; then
              echo NANDFW=openipc/${NANDFW} >> ${GITHUB_ENV}
            else
              mv ${NANDFW} ../${NAME}-nand.tgz
              echo NANDFW=${NAME}-nand.tgz >> ${GITHUB_ENV}
            fi
          fi

          if [ -z ${NORFW} ] && [ -z ${NANDFW} ]; then
            exit 1
          fi

      - name: Upload firmware
        if: env.NORFW || env.NANDFW
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ needs.resolve.outputs.tag_name }}
          prerelease: true
          body: |
            sha=${{ needs.resolve.outputs.ref }}
            short=${{ needs.resolve.outputs.short_sha }}
            platform=${{ inputs.platform }}
            one_off=true
          files: |
            ${{env.NORFW}}
            ${{env.NANDFW}}