# GitHub Actions Workflow to build FreeRTOS Firmware for PineTime Smart Watch
# See https://lupyuen.github.io/pinetime-rust-mynewt/articles/cloud
# Based on https://github.com/JF002/Pinetime/blob/master/doc/buildAndProgram.md
# and https://github.com/JF002/Pinetime/blob/master/bootloader/README.md

# Name of this Workflow
name: Simulate PineTime Firmware

# When to run this Workflow...
on:

  # Run this Workflow when files are updated (Pushed) in the "master" Branch
  push:
    branches: [ master ]
    
  # Also run this Workflow when a Pull Request is created or updated in the "master" Branch
  pull_request:
    branches: [ master ]

# Steps to run for the Workflow
jobs:
  build:

    # Run these steps on Ubuntu
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2

    - name: Fetch cache for Rust Toolchain
      id:   cache-rust
      uses: actions/cache@v2
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          target
        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}

    - name: Install Rust Toolchain for emscripten
      run:  |
        rustup default nightly
        rustup target add wasm32-unknown-emscripten

    - name: Check cache for emscripten
      id:   cache-emsdk
      uses: actions/cache@v2
      env:
        cache-name: cache-emsdk
      with:
        path: /tmp/emsdk
        key:  ${{ runner.os }}-build-${{ env.cache-name }}
        restore-keys: ${{ runner.os }}-build-${{ env.cache-name }}

    - name: Install emscripten
      if:   steps.cache-emsdk.outputs.cache-hit != 'true'  # Install emscripten if not found in cache
      run:  |
        # Based on https://emscripten.org/docs/getting_started/downloads.html
        cd /tmp

        # Get the emsdk repo
        git clone https://github.com/emscripten-core/emsdk.git

        # Enter that directory
        cd emsdk

        # Download and install the latest SDK tools.
        ./emsdk install latest

        # Make the "latest" SDK "active" for the current user. (writes .emscripten file)
        ./emsdk activate latest

        # Activate PATH and other environment variables in the current terminal
        source ./emsdk_env.sh

        # Show version
        emcc --version
        emcc --version        

    - name: Check cache for wabt
      id:   cache-wabt
      uses: actions/cache@v2
      env:
        cache-name: cache-wabt
      with:
        path: /tmp/wabt
        key:  ${{ runner.os }}-build-${{ env.cache-name }}
        restore-keys: ${{ runner.os }}-build-${{ env.cache-name }}

    - name: Install wabt
      if:   steps.cache-wabt.outputs.cache-hit != 'true'  # Install wabt if not found in cache
      run:  |
        cd /tmp
        git clone --recursive https://github.com/WebAssembly/wabt
        cd wabt
        mkdir build
        cd build
        cmake ..
        cmake --build .

    - name: Checkout LVGL for WebAssembly
      run:  |
        cd /tmp
        git clone https://github.com/AppKaki/lvgl-wasm
        
    - name: Copy Watch Face Clock.cpp to LVGL for WebAssembly
      run:  |
        cp src/DisplayApp/Screens/Clock.cpp /tmp/lvgl-wasm/clock

    - name: Build LVGL for WebAssembly
      run:  |
        # Add emscripten and wabt to the PATH
        source /tmp/emsdk/emsdk_env.sh
        export PATH=$PATH:/tmp/wabt/build

        # Build LVGL app: wasm/lvgl.html, lvgl.js, lvgl.wasm
        cd /tmp/lvgl-wasm
        wasm/lvgl.sh

    - name: Show files
      run:  set ; pwd ; ls -l /tmp/lvgl-wasm

    - name: Copy WebAssembly to GitHub Pages
      run:  |
        if [ ! -d docs ]; then
          mkdir docs
        fi
        cp /tmp/lvgl-wasm/wasm/*.html /tmp/lvgl-wasm/wasm/*.js /tmp/lvgl-wasm/wasm/*.wasm /tmp/lvgl-wasm/wasm/*.txt docs

    - name: Commit GitHub Pages
      run:  |
        echo TODO

    - name: Upload Outputs
      uses: actions/upload-artifact@v2
      with:
        name: wasm
        path: |
          /tmp/lvgl-wasm/wasm/*.html
          /tmp/lvgl-wasm/wasm/*.js
          /tmp/lvgl-wasm/wasm/*.wasm
          /tmp/lvgl-wasm/wasm/*.txt