param([string]$Configuration = "Debug")

$ErrorActionPreference="Stop"

. $PSScriptRoot\_common.ps1

# Capture PATH for later
$StartPath = $env:PATH
$StartDotNetHome = $env:DOTNET_HOME

try {

    # Check prereqs
    if (!(Get-Command -ErrorAction SilentlyContinue cmake)) {
        throw @"
cmake is required to build the native host 'corehost'"
Download it from https://www.cmake.org
"@
    }

    # Install a stage 0
    header "Installing dotnet stage 0"
    & "$PSScriptRoot\install.ps1"

    # Put stage 0 on the path
    $DotNetTools = $env:DOTNET_INSTALL_DIR
    if (!$DotNetTools) {
        $DotNetTools = "$($env:LOCALAPPDATA)\Microsoft\dotnet"
    }

    if (Test-Path "$DotNetTools\cli\dotnet.exe") {
        Write-Warning "Your stage0 is using the old layout"
        $DnxDir = "$DotNetTools\cli\dnx"
        $env:PATH = "$DotNetTools\cli;$StartPath"
    } elseif (Test-Path "$DotNetTools\cli\bin\dotnet.exe") {
        $DnxDir = "$DotNetTools\cli\bin\dnx"
        $env:PATH = "$DotNetTools\cli\bin;$StartPath"
    } else {
        throw "Couldn't find stage0 dotnet tools!"
    }

    # Restore packages
    header "Restoring packages"
    dotnet restore "$RepoRoot" --quiet --runtime "osx.10.10-x64" --runtime "ubuntu.14.04-x64" --runtime "win7-x64"

    header "Building corehost"
    pushd "$RepoRoot\src\corehost"
    try {
        if (!(Test-Path "cmake\$Rid")) {
            mkdir "cmake\$Rid" | Out-Null
        }
        cd "cmake\$Rid"
        cmake ..\.. -G "Visual Studio 14 2015 Win64"
        $pf = $env:ProgramFiles
        if (Test-Path "env:\ProgramFiles(x86)") {
            $pf = (cat "env:\ProgramFiles(x86)")
        }
        & "$pf\MSBuild\14.0\Bin\MSBuild.exe" ALL_BUILD.vcxproj /p:Configuration="$Configuration"

        if (!(Test-Path $HostDir)) {
            mkdir $HostDir | Out-Null
        }
        cp "$RepoRoot\src\corehost\cmake\$Rid\$Configuration\corehost.exe" $HostDir
        cp "$RepoRoot\src\corehost\cmake\$Rid\$Configuration\corehost.pdb" $HostDir
    } finally {
        popd
    }

    # Build Stage 1
    header "Building stage1 dotnet using downloaded stage0 ..."
    & "$PSScriptRoot\build\build-stage.ps1" -Tfm:$Tfm -Rid:$Rid -Configuration:$Configuration -OutputDir:$Stage1Dir -RepoRoot:$RepoRoot -HostDir:$HostDir

    # Build Stage 2 using Stage 1
    $env:PATH = "$Stage1Dir\bin;$StartPath"
    header "Building stage2 dotnet using just-built stage1 ..."
    & "$PSScriptRoot\build\build-stage.ps1" -Tfm:$Tfm -Rid:$Rid -Configuration:$Configuration -OutputDir:$Stage2Dir -RepoRoot:$RepoRoot -HostDir:$HostDir

    # Crossgen Roslyn
    header "Crossgening Roslyn compiler ..."
    cmd /c "$PSScriptRoot\crossgen\crossgen_roslyn.cmd" "$Stage2Dir"

    # Copy dnx into stage 2
    cp -rec "$DnxDir\*" "$Stage2Dir\bin\dnx\"

    # Copy in the dotnet-restore script
    cp "$PSScriptRoot\dotnet-restore.cmd" "$Stage2Dir\bin\dotnet-restore.cmd"

    # Smoke test stage2
    $env:PATH = "$Stage2Dir\bin;$StartPath"
    $env:DOTNET_HOME = "$Stage2Dir"
    & "$PSScriptRoot\test\smoke-test.ps1"
} finally {
    $env:PATH = $StartPath
    $env:DOTNET_HOME = $StartDotNetHome
}