#!/usr/bin/env sh

USER_SHELL="$HOME/.zshrc"
TIMEZONE="Canada/Mountain"
AVD_DEVICE="Nexus 5X" # replace with your prefered device from 'avdmanager list device'

get_timezone() {
    PS3="Choose your timezone: "
    options=("Mountain" "Pacific")
    select opt in "${options[@]}"
    do
        case $opt in
            "Mountain")
                TIMEZONE="Canada/Mountain"
                break
                ;;
            "Pacific")
                TIMEZONE="Canada/Pacific"
                break
                ;;
            *) echo invalid option;;
        esac
    done
}

get_shell() {
    PS3="Choose your shell: "
    options=("Zsh" "Bash")
    select opt in "${options[@]}"
    do
        case $opt in
            "Zsh")
                USER_SHELL="$HOME/.zshrc"
                break
                ;;
            "Bash")
                USER_SHELL="$HOME/.bash_profile"
                break
                ;;
            *) echo invalid option;;
        esac
    done
}

setup_android_emulator(){
    AVD_NAME=$1
    AVD_TARGET=$2

    echo "\nCreating AVD image $AVD_NAME"
    avdmanager create avd -c 64M -n $AVD_NAME -d "${AVD_DEVICE}" -k $AVD_TARGET

    echo "hw.keyboard=yes" >> $HOME/.android/avd/$AVD_NAME\.avd/config.ini
}

get_timezone
echo
get_shell

# =======================
# install Java8 and Android SDK
echo "\nInstalling Java8"
brew cask install caskroom/versions/java8

echo "\nInstalling Android SDK"
brew cask install android-sdk

# =======================
# export shell path to work with Android
echo "\n# Android PATHs" >> $USER_SHELL
echo 'export ANDROID_HOME="/usr/local/share/android-sdk"' >> $USER_SHELL
echo 'export PATH="$ANDROID_HOME/platform-tools:$ANDROID_HOME/emulator:$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin/:$PATH"' >> $USER_SHELL

# create a function to easily start the emulator from the shell
echo '\n# pass the parameter to be one of the created images api21, api24, api25, api26, or api27
function startEmulator() { emulator -timezone '$TIMEZONE' -noaudio -no-boot-anim -memory 256 -avd $1& }' >> $USER_SHELL

ANDROID_HOME="/usr/local/share/android-sdk"
PATH="$ANDROID_HOME/platform-tools:$ANDROID_HOME/emulator:$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin/:$PATH"

# =======================
# install Android tools
yes | sdkmanager --licenses

echo "\nInstalling Android SDK"
sdkmanager --verbose "build-tools;27.0.3" \
 "docs" \
 "emulator" \
 "tools" \
 "extras;android;gapid;3" \
 "extras;android;m2repository" \
 "extras;google;google_play_services" \
 "extras;google;m2repository" \
 "extras;intel;Hardware_Accelerated_Execution_Manager" \
 "extras;m2repository;com;android;support;constraint;constraint-layout-solver;1.0.2" \
 "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2" \
 "patcher;v4" \
 "platform-tools" \
 "platforms;android-21" \
 "platforms;android-22" \
 "platforms;android-23" \
 "platforms;android-24" \
 "platforms;android-25" \
 "platforms;android-26" \
 "platforms;android-27" \
 "system-images;android-21;default;x86_64" \
 "system-images;android-24;default;x86_64" \
 "system-images;android-25;google_apis;x86" \
 "system-images;android-26;google_apis;x86_64" \
 "system-images;android-27;google_apis;x86"

echo "\nUpdating Android SDK"
sdkmanager --update

# =======================
# install Intel HAXM
echo "\nEnter your admin password to silently install Intel Accelerated Execution Manager kernel extension" \
&& sudo sh /usr/local/share/android-sdk/extras/intel/Hardware_Accelerated_Execution_Manager/silent_install.sh

# =======================
# Create a few AVDs
# -d specified the device you'd like to use, choose and replace with your prefered device from 'avdmanager list device'
echo "\nCreating AVD image for API 21"
setup_android_emulator "api21" "system-images;android-21;default;x86_64"

echo "\nCreating AVD image for API 24"
setup_android_emulator "api24"  "system-images;android-24;default;x86_64"

echo "\nCreating AVD image for API 25"
setup_android_emulator "api25" "system-images;android-25;google_apis;x86"

echo "\nCreating AVD image for API 26"
setup_android_emulator "api26" "system-images;android-26;google_apis;x86_64"

echo "\nCreating AVD image for API 27"
setup_android_emulator "api27" "system-images;android-27;google_apis;x86"

# =======================
# For some reason Android complains if this file is missing, touch it.
touch $HOME/.android/repositories.cfg

echo "\nInstallation successful, restart your shell"