#!/usr/bin/env bash
#-------------------------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
#-------------------------------------------------------------------------------------------------------------
#
# Docs: https://github.com/microsoft/vscode-dev-containers/blob/main/script-library/docs/hugo.md
# Maintainer: The VS Code and Codespaces Teams

USERNAME=${USERNAME:-"automatic"}
UPDATE_RC=${UPDATE_RC:-"true"}

set -eux

if [ "$(id -u)" -ne 0 ]; then
    echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
    exit 1
fi

# Ensure that login shells get the correct path if the user updated the PATH using ENV.
rm -f /etc/profile.d/00-restore-env.sh
echo "export PATH=${PATH//$(sh -lc 'echo $PATH')/\$PATH}" > /etc/profile.d/00-restore-env.sh
chmod +x /etc/profile.d/00-restore-env.sh

# Determine the appropriate non-root user
if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
    USERNAME=""
    POSSIBLE_USERS=("vscode" "node" "codespace" "$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)")
    for CURRENT_USER in "${POSSIBLE_USERS[@]}"; do
        if id -u ${CURRENT_USER} > /dev/null 2>&1; then
            USERNAME=${CURRENT_USER}
            break
        fi
    done
    if [ "${USERNAME}" = "" ]; then
        USERNAME=root
    fi
elif [ "${USERNAME}" = "none" ] || ! id -u ${USERNAME} > /dev/null 2>&1; then
    USERNAME=root
fi

function updaterc() {
    if [ "${UPDATE_RC}" = "true" ]; then
        echo "Updating /etc/bash.bashrc and /etc/zsh/zshrc..."
        if [[ "$(cat /etc/bash.bashrc)" != *"$1"* ]]; then
            echo -e "$1" >> /etc/bash.bashrc
        fi
        if [ -f "/etc/zsh/zshrc" ] && [[ "$(cat /etc/zsh/zshrc)" != *"$1"* ]]; then
            echo -e "$1" >> /etc/zsh/zshrc
        fi
    fi
}

# Function to run apt-get if needed
apt_get_update_if_needed()
{
    if [ ! -d "/var/lib/apt/lists" ] || [ "$(ls /var/lib/apt/lists/ | wc -l)" = "0" ]; then
        echo "Running apt-get update..."
        apt-get update
    else
        echo "Skipping apt-get update."
    fi
}

# Checks if packages are installed and installs them if not
check_packages() {
    if ! dpkg -s "$@" > /dev/null 2>&1; then
        apt_get_update_if_needed
        DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends "$@"
    fi
}

install_dotnet_using_apt() {
    wget --no-check-certificate https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
    sudo dpkg -i packages-microsoft-prod.deb
    rm packages-microsoft-prod.deb
    
    rm -rf /var/lib/apt/lists/*
    check_packages apt-transport-https dotnet-sdk-6.0
}

# Install dependencies
check_packages git sudo wget ca-certificates

# If we don't already have Oryx installed, install it now.
if ! oryx --version > /dev/null ; then
    echo "Installing Oryx..."

    # Install dotnet unless available
    if ! dotnet --version > /dev/null ; then
        echo "'dotnet' was not detected. Attempting to install the latest version of the dotnet sdk to build oryx."
        install_dotnet_using_apt

        if ! dotnet --version > /dev/null ; then
            echo "Please install Dotnet before installing Oryx"
            exit 1
        fi
    fi

    BUILD_SCRIPT_GENERATOR=/usr/local/buildscriptgen 
    ORYX=/usr/local/oryx
    GIT_ORYX=/tmp/oryx 

    mkdir -p ${BUILD_SCRIPT_GENERATOR}
    mkdir -p ${ORYX}

    chown -R ${USERNAME} ${BUILD_SCRIPT_GENERATOR} ${ORYX}
    git clone --depth=1 https://github.com/microsoft/Oryx $GIT_ORYX

    $GIT_ORYX/build/buildSln.sh

    dotnet publish -property:ValidateExecutableReferencesMatchSelfContained=false -r linux-x64 -o ${BUILD_SCRIPT_GENERATOR} -c Release $GIT_ORYX/src/BuildScriptGeneratorCli/BuildScriptGeneratorCli.csproj
    
    dotnet publish -r linux-x64 -o ${BUILD_SCRIPT_GENERATOR} -c Release $GIT_ORYX/src/BuildServer/BuildServer.csproj

    chmod a+x ${BUILD_SCRIPT_GENERATOR}/GenerateBuildScript

    ln -s ${BUILD_SCRIPT_GENERATOR}/GenerateBuildScript ${ORYX}/oryx
    cp -f $GIT_ORYX/images/build/benv.sh ${ORYX}/benv

    ORYX_INSTALL_DIR="/tmp/oryx-platforms"
    mkdir -p "${ORYX_INSTALL_DIR}"
    chown -R ${USERNAME} "${ORYX_INSTALL_DIR}"

    updaterc "export PATH=$PATH:/usr/local/oryx && export ORYX_SDK_STORAGE_BASE_URL=https://oryx-cdn.microsoft.io && export ENABLE_DYNAMIC_INSTALL=true && DYNAMIC_INSTALL_ROOT_DIR=$ORYX_INSTALL_DIR"
fi

echo "Done!"