name: Build G-Launcher Release

on:
  workflow_dispatch:
    inputs:
      tag_name:
        description: 'Release Tag Name (e.g. latest, release, v1.0.0)'
        required: false
        default: 'release'
      custom_version:
        description: 'Override Version (leave blank for auto-increment)'
        required: false
        default: ''
  push:
    tags:
      - 'v*'

permissions:
  contents: write

concurrency:
  group: build-g-launcher-release
  cancel-in-progress: false

jobs:
  build:
    runs-on: windows-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
          cache-dependency-path: go.sum

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 22
          cache: npm
          cache-dependency-path: frontend/package-lock.json

      - name: Install Wails CLI
        shell: pwsh
        run: |
          go install github.com/wailsapp/wails/v3/cmd/wails3@v3.0.0-alpha.74
          "$env:USERPROFILE\go\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append

      - name: Calculate launcher version
        shell: pwsh
        run: |
          $customVersion = "${{ github.event.inputs.custom_version }}"
          $releaseTag = if ("${{ github.event.inputs.tag_name }}") { "${{ github.event.inputs.tag_name }}" } else { "release" }
          
          if ($customVersion -and $customVersion.Trim() -ne "") {
            $version = $customVersion.Trim()
            Write-Host "Using user-specified version: $version"
          } else {
            $manifestPath = Join-Path $env:RUNNER_TEMP "latest.json"
            # Attempt to fetch latest.json from current repository release
            $repo = "${{ github.repository }}"
            $manifestUrl = "https://github.com/$repo/releases/download/$releaseTag/latest.json"
            $cacheBust = [DateTimeOffset]::UtcNow.ToUnixTimeMilliseconds()
            $requestUrl = "$($manifestUrl)?cachebust=$cacheBust"

            Write-Host "Checking current manifest from: $requestUrl"
            $status = & curl.exe --location --silent --show-error --output $manifestPath --write-out "%{http_code}" $requestUrl

            if ($status -eq "200") {
              $currentVersion = (Get-Content -Raw $manifestPath | ConvertFrom-Json).version
              Write-Host "Found previous version: $currentVersion"
              $version = node scripts/launcher-release.mjs next $currentVersion
            } else {
              Write-Host "No previous manifest found (HTTP $status). Starting at 1.0.0"
              $version = "1.0.0"
            }
          }

          [System.IO.File]::AppendAllText($env:GITHUB_ENV, "LAUNCHER_VERSION=$version" + [Environment]::NewLine)
          [System.IO.File]::AppendAllText($env:GITHUB_ENV, "RELEASE_TAG=$releaseTag" + [Environment]::NewLine)
          
          node scripts/launcher-release.mjs stamp-info $version build/windows/info.json
          Write-Host "Configured G-Launcher version $version"

      - name: Install Frontend Dependencies
        working-directory: frontend
        run: npm ci

      - name: Build Frontend
        working-directory: frontend
        run: npm run build

      - name: Build Windows Executable
        shell: pwsh
        run: |
          wails3 task build BUILD_VERSION=$env:LAUNCHER_VERSION PRODUCTION=true
        env:
          PRODUCTION: "true"

      - name: Prepare Release Assets
        shell: pwsh
        run: |
          $builtLauncher = "bin/G-Launcher.exe"
          if (!(Test-Path $builtLauncher)) {
            $fallback = Get-ChildItem -Path "bin" -Filter "*.exe" | Select-Object -First 1
            if ($fallback) {
              $builtLauncher = $fallback.FullName
            } else {
              throw "Build output was not found in bin directory."
            }
          }

          $releaseLauncher = Join-Path $env:RUNNER_TEMP "G-Launcher.exe"
          Copy-Item -LiteralPath $builtLauncher -Destination $releaseLauncher -Force

          $manifestPath = Join-Path $env:RUNNER_TEMP "latest.json"
          node scripts/launcher-release.mjs manifest $env:LAUNCHER_VERSION $releaseLauncher $manifestPath
          
          Write-Host "Release assets prepared:"
          Get-Item $releaseLauncher, $manifestPath | Select-Object Name, Length

      - name: Publish Release Assets
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ env.RELEASE_TAG }}
          files: |
            ${{ runner.temp }}/G-Launcher.exe
            ${{ runner.temp }}/latest.json
          overwrite_files: true
          fail_on_unmatched_files: true