$ErrorActionPreference = "Stop"

$ROOT = "D:\ae\cached_external_library\win_webrtc"

$DEPOT_TOOLS = "$ROOT\depot_tools"

$WEBRTC_ROOT = "$ROOT\src"

$OUT_DIR = "out\release"


Write-Host "=============================="
Write-Host "WebRTC Build"
Write-Host "ROOT=$ROOT"
Write-Host "=============================="


#
# Load VS2022 environment
#

$VS_DEV_CMD = "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\Tools\VsDevCmd.bat"

if (!(Test-Path $VS_DEV_CMD))
{
    throw "Cannot find VS2022 VsDevCmd.bat"
}


Write-Host "Loading VS2022 environment..."


cmd.exe /c "`"$VS_DEV_CMD`" -host_arch=x64 -arch=x64 && set" |
        ForEach-Object {

            if ($_ -match "^(.*?)=(.*)$")
            {

                $name = $matches[1]
                $value = $matches[2]

                Set-Item "env:$name" $value
            }
        }


#
# Create root
#

if (!(Test-Path $ROOT))
{

    New-Item `
        -ItemType Directory `
        -Path $ROOT `
        | Out-Null
}


#
# depot_tools
#

if (!(Test-Path $DEPOT_TOOLS))
{

    Write-Host "Cloning depot_tools..."

    git clone `
        https://chromium.googlesource.com/chromium/tools/depot_tools.git `
        $DEPOT_TOOLS
}


$env:PATH = "$DEPOT_TOOLS;$env:PATH"


Write-Host "Checking depot_tools..."

where.exe gclient


#
# Fetch WebRTC
#

if (!(Test-Path $WEBRTC_ROOT))
{

    Write-Host "Fetching WebRTC..."

    Set-Location $ROOT

    fetch --nohooks webrtc

}
else
{

    Write-Host "WebRTC source exists, skip fetch"
}


Set-Location $WEBRTC_ROOT


#
# Sync dependencies
#

Write-Host "Sync dependencies..."

gclient sync


#
# Run hooks
#

Write-Host "Run hooks..."

gclient runhooks


#
# Generate build files
#

Write-Host "Generate Ninja build..."


gn gen $OUT_DIR --args='
is_debug=false
is_component_build=false
target_cpu="x64"

rtc_build_examples=false
rtc_build_tools=false
rtc_include_tests=false

use_rtti=true

symbol_level=0
'


#
# Build
#

Write-Host "Build WebRTC..."

ninja -C $OUT_DIR


Write-Host ""
Write-Host "=============================="
Write-Host "WebRTC build finished"
Write-Host "Output:"
Write-Host "$WEBRTC_ROOT\$OUT_DIR"
Write-Host "=============================="