trap {
    &$TrapHandler
}


Function Register-WebApp {
<#
.LINKS

http://www.iis.net/learn/manage/powershell/powershell-snap-in-creating-web-sites-web-applications-virtual-directories-and-application-pools
#>
    param (
        [String] $Source,
        [String] $Path = "C:\inetpub\wwwroot",
        [String] $Name = "",
        [String] $Username = "",
        [String] $Password = ""
    )
    begin {
        Show-InvocationInfo $MyInvocation
    }
    end {
        Show-InvocationInfo $MyInvocation -End
    }
    process {
        trap {
            &$TrapHandler
        }

        Import-Module WebAdministration

        if ($Name -eq "") {
            $Name = @([IO.Path]::GetDirectoryName($Source) -split '\\')[-1]
            if ($Name -eq "wwwroot") {
                throw("Application pool name couldn't be 'wwwroot'.")
            }
        }
        else {
            $Path = [IO.Path]::Combine($Path, $Name)
        }

        $null = Copy-Item -Path $Source -Destination $Path -Recurse -Force

        # Create new application pool
        $AppPool = New-WebAppPool -Name $Name -Force
        #$AppPool = Get-Item "IIS:\AppPools\$Name"
        $AppPool.managedRuntimeVersion = 'v4.0'
        $AppPool.managedPipelineMode = 'Classic'
        $AppPool.processModel.loadUserProfile = $true
        $AppPool.processModel.logonType = 'LogonBatch'

        #Set Identity type
        if ($Username -eq "") {
            $AppPool.processModel.identityType = 'ApplicationPoolIdentity'
        }
        else {
            $AppPool.processModel.identityType = 'SpecificUser'
            $AppPool.processModel.userName = $Username
            $AppPool.processModel.password = $Password
            $null = $AppPool | Set-Item
        }


        # Create Website
        $WebSite = New-WebSite -Name $Name -Port 80 -HostHeader $Name -PhysicalPath $Path -Force
        #$WebSite = Get-Item "IIS:\Sites\$Name"

        # Set the Application Pool
        $null = Set-ItemProperty "IIS:\Sites\$Name" 'ApplicationPool' $Name

        #Turn on Directory Browsing
        #Set-WebConfigurationProperty -Filter '/system.webServer/directoryBrowse' -Name 'enabled' -Value $true -PSPath "IIS:\Sites\$Name"

        # Update Authentication
        #Set-WebConfigurationProperty -Filter '/system.WebServer/security/authentication/AnonymousAuthentication' -Name 'enabled' -Value $true -Location $name
        #Set-WebConfigurationProperty -Filter '/system.WebServer/security/authentication/windowsAuthentication' -Name 'enabled' -Value $false -Location $Name
        #Set-WebConfigurationProperty -Filter '/system.WebServer/security/authentication/basicAuthentication' -Name 'enabled' -Value $false -Location $Name

        $null = $WebSite.Start()

        $null = Add-Content -Path "C:\Windows\System32\Drivers\etc\hosts" -Value "127.0.0.1   $Name"

        # Remove standard IIS 'Hello World' application from localhost:80
        $null = Get-WebBinding 'Default Web Site' | Remove-WebBinding
        # Add new application on http://localhost:80
        $null = New-WebBinding -Name "$Name" -IP "*" -Port 80 -Protocol http
    }
}



Function Deploy-WebAppFromGit {
    param (
        [String] $URL,
        [String] $TempPath = [IO.Path]::Combine([IO.Path]::GetTempPath(), [IO.Path]::GetRandomFileName()),
        [String] $OutputPath = [IO.Path]::Combine([IO.Path]::GetTempPath(), [IO.Path]::GetRandomFileName())
    )
    begin {
        Show-InvocationInfo $MyInvocation
    }
    end {
        Show-InvocationInfo $MyInvocation -End
    }
    process {
        trap {
            &$TrapHandler
        }

        Write-Log "TempPath = '$TempPath'"
        Write-Log "OutputPath = '$OutputPath'"


        # Fetch web application
        #----------------------
        Write-Log "Fetching sources from Git ..."

        $null = New-Item -Path $TempPath -ItemType Container
        $null = Exec -FilePath 'git.exe' -ArgumentList @('clone', $URL) -WorkingDir $TempPath -RedirectStreams

        $Path = @(Get-ChildItem $TempPath)[0].FullName
        #----------------------


        # Build web application
        #----------------------
        Write-Log "Building sources ..."

        $msbuild = "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe"

        $null = New-Item -Path $OutputPath -ItemType Container

        $SlnFiles = @(Get-ChildItem -Path $Path -Filter *.sln -Recurse)

        # Start new processs with additional env variables:
        #* VisualStudioVersion = "10.0"
        #* EnableNuGetPackageRestore  = "true"
        $null = Exec -FilePath $msbuild `
            -ArgumentList @($SlnFiles[0].FullName, "/p:OutputPath=$OutputPath") `
            -Environment @{'VisualStudioVersion' = '10.0'; 'EnableNuGetPackageRestore' = 'true'} `
            -RedirectStreams

        $AppFolder = @(Get-ChildItem ([IO.Path]::Combine($OutputPath, '_PublishedWebsites')))[0]
        #----------------------


        # Install web application
        #------------------------
        $null = Register-WebApp -Source $AppFolder.FullName -Name $AppFolder.Name
        #------------------------
    }
}