# Use the .NET Core APIs to determine the current platform; if a runtime
# exception is thrown, we are on FullCLR, not .NET Core.
#
# TODO: import Microsoft.PowerShell.Platform instead
try {
    $Runtime = [System.Runtime.InteropServices.RuntimeInformation]
    $OSPlatform = [System.Runtime.InteropServices.OSPlatform]

    $IsCore = $true
    $IsLinux = $Runtime::IsOSPlatform($OSPlatform::Linux)
    $IsOSX = $Runtime::IsOSPlatform($OSPlatform::OSX)
    $IsWindows = $Runtime::IsOSPlatform($OSPlatform::Windows)
} catch [System.Management.Automation.RuntimeException] {
    $IsCore = $false
    $IsLinux = $false
    $IsOSX = $false
    $IsWindows = $true
}

function Start-PSBuild
{
    param(
        [switch]$Restore,
        [string]$Output = "$PSScriptRoot/bin"
    )

    if (-Not (Get-Command "dotnet" -ErrorAction SilentlyContinue)) {
        throw "Build dependency 'dotnet' not found in PATH! See: https://dotnet.github.io/getting-started/"
    }

    New-Item -Force -Type Directory $Output | Out-Null

    $Top = "$PSScriptRoot/src/Microsoft.PowerShell.Linux.Host"
    if ($Restore -Or -Not (Test-Path "$Top/project.lock.json")) {
        dotnet restore $PSScriptRoot
    }

    if ($IsLinux -Or $IsOSX) {
        $InstallCommand = if ($IsLinux) { "apt-get" } elseif ($IsOSX) { "brew" }
        foreach ($Dependency in "cmake", "g++") {
            if (-Not (Get-Command $Dependency -ErrorAction SilentlyContinue)) {
                throw "Build dependency '$Dependency' not found in PATH! Run '$InstallCommand install $Dependency'"
            }
        }

        $Ext = if ($IsLinux) { "so" } elseif ($IsOSX) { "dylib" }
        $Native = "$PSScriptRoot/src/libpsl-native"
        $Lib = "$Native/src/libpsl-native.$Ext"
        Write-Host "Building $Lib"

        try {
            pushd $Native
            cmake -DCMAKE_BUILD_TYPE=Debug .
            make -j
            make test
        } finally {
            popd
        }

        if (-Not (Test-Path $Lib)) { throw "Compilation of $Lib failed" }
        cp $Lib $Output
    }

    Write-Host "Building PowerShell"

    $Configuration =
        if ($IsLinux -Or $IsOSX) { "Linux" }
        elseif ($IsWindows) { "Debug" }

    dotnet publish -o $Output -c $Configuration -f "netstandardapp1.5" $Top
}

function Start-PSPackage
{
    # PowerShell packages use Semantic Versioning http://semver.org/
    #
    # Ubuntu and OS X packages are supported.
    param(
        [string]$Version,
        [int]$Iteration = 1
    )

    if ($IsWindows) { throw "Building Windows packages is not yet supported!" }

    if (-Not (Get-Command "fpm" -ErrorAction SilentlyContinue)) {
        throw "Build dependency 'fpm' not found in PATH! See: https://github.com/jordansissel/fpm"
    }

    if (-Not(Test-Path "$PSScriptRoot/bin/powershell")) {
        throw "Please Start-PSBuild to publish PowerShell"
    }

    # Change permissions for packaging
    chmod -R go=u "$PSScriptRoot/bin"

    # Decide package output type
    $Output = if ($IsLinux) { "deb" } elseif ($IsOSX) { "osxpkg" }

    # Use Git tag if not given a version
    if (-Not($Version)) {
        $Version = (git --git-dir="$PSScriptRoot/.git" describe) -Replace '^v'
    }

    # Build package
    fpm --force --verbose `
        --name "powershell" `
        --version $Version `
        --iteration $Iteration `
        --maintainer "Andrew Schwartzmeyer <andschwa@microsoft.com>" `
        --vendor "Microsoft <mageng@microsoft.com>" `
        --url "https://github.com/PowerShell/PowerShell" `
        --license "Unlicensed" `
        --description "Open PowerShell on .NET Core\nPowerShell is an open-source, cross-platform, scripting language and rich object shell. Built upon .NET Core, it is also a C# REPL.\n" `
        --category "shells" `
        --depends "libunwind8" `
        --depends "libicu52" `
        --deb-build-depends "dotnet" `
        --deb-build-depends "cmake" `
        --deb-build-depends "g++" `
        -t $Output `
        -s dir `
        "$PSScriptRoot/bin/=/usr/local/share/powershell/" `
        "$PSScriptRoot/package/powershell=/usr/local/bin"
}

function Start-DevPSGitHub
{
    param(
        [switch]$ZapDisable,
        [string[]]$ArgumentList = '',
        [switch]$LoadProfile,
        [string]$binDir = "$PSScriptRoot\binFull",
        [switch]$NoNewWindow
    )

    try
    {
        if ($LoadProfile -eq $false)
        {
            $ArgumentList = @('-noprofile') + $ArgumentList
        }

        $env:DEVPATH = $binDir
        if ($ZapDisable)
        {
            $env:COMPLUS_ZapDisable = 1
        }

        if (-Not (Test-Path $binDir\powershell.exe.config))
        {
            $configContents = @"
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <runtime>
        <developmentMode developerInstallation="true"/>
    </runtime>
</configuration>
"@
            $configContents | Out-File -Encoding Ascii $binDir\powershell.exe.config
        }

        # splatting for the win
        $startProcessArgs = @{
            FilePath = "$binDir\powershell.exe"
            ArgumentList = "$ArgumentList"
        }

        if ($NoNewWindow) {
            $startProcessArgs.NoNewWindow = $true
            $startProcessArgs.Wait = $true
        }

        Start-Process @startProcessArgs
    }
    finally
    {
        ri env:DEVPATH
        if ($ZapDisable)
        {
            ri env:COMPLUS_ZapDisable
        }
    }
}