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#!/usr/bin/env bash

UNAMEOUT="$(uname -s)"

WHITE="\033[1;37m"
NC="\033[0m"

ENV_FILE="./.docker/.env"
ENV_USER="devilbox"
COMPOSE="docker-compose --file=./.docker/docker-compose.yml --env-file=${ENV_FILE}"
PWD=$(pwd)

# Verify operating system is supported...
case "${UNAMEOUT}" in
    Linux*)             MACHINE=linux;;
    Darwin*)            MACHINE=mac;;
    *)                  MACHINE="UNKNOWN"
esac

if [ "$MACHINE" == "UNKNOWN" ]; then
    echo "Unsupported operating system [$(uname -s)]." >&2

    exit 1
fi

# Define environment variables...
export APP_PORT=${APP_PORT:-80}
export APP_SERVICE=${APP_SERVICE:-"app"}
export DB_PORT=${DB_PORT:-3306}
export WWWUSER=${WWWUSER:-$UID}
export WWWGROUP=${WWWGROUP:-$(id -g)}

if [ "$MACHINE" == "linux" ]; then
    export SEDCMD="sed -i"
elif [ "$MACHINE" == "mac" ]; then
    export SEDCMD="sed -i .bak"
fi

# Ensure that Docker is running...
if ! docker info > /dev/null 2>&1; then
    echo -e "${WHITE}Docker is not running.${NC}" >&2

    exit 1
fi

# Determine if docker compose is currently up...
PSRESULT="$($COMPOSE ps -q)"

if $COMPOSE ps | grep 'Exit' &> /dev/null; then
    $COMPOSE down > /dev/null 2>&1

    EXEC="no"
elif [ -n "$PSRESULT" ]; then
    EXEC="yes"
else
    EXEC="no"
fi

# Function that outputs docker compose is not running...
function app_is_not_running {
    echo -e "${WHITE}App is not running.${NC}" >&2
    echo "" >&2
    echo -e "${WHITE}You may App using the following commands:${NC} 'docker-compose up' or 'docker-compose up -d'" >&2

    exit 1
}

if [ $# -gt 0 ]; then
    # Source the ".env" file so Laravel environment variables are available...
    if [ -f "${ENV_FILE}" ]; then
        source "${ENV_FILE}"
    fi

    # Proxy PHP commands to the "php" binary on the application container...
    if [ "$1" == "php" ]; then
        shift 1

        if [ "$EXEC" == "yes" ]; then
            $COMPOSE exec --user=$ENV_USER \
                "$APP_SERVICE" \
                php "$@"
        else
            app_is_not_running
        fi

    # Initiate a MariaDb CLI terminal session within the "mariadb" container...
    elif [ "$1" == "mysql" ]; then
        shift 1

        if [ "$EXEC" == "yes" ]; then
            $COMPOSE exec \
                mariadb \
                bash -c "MYSQL_PWD=${MYSQL_PASSWORD} mysql -u ${MYSQL_USER} ${MYSQL_DATABASE}"
        else
            app_is_not_running
        fi

    # Initiate a Bash shell within the application container...
    elif [ "$1" == "shell" ] || [ "$1" == "bash" ]; then
        shift 1

        if [ "$EXEC" == "yes" ]; then
            $COMPOSE exec --user=$ENV_USER $APP_SERVICE bash
        else
            app_is_not_running
        fi

    # Initiate a Bash shell within the MariaDB container...
    elif [ "$1" == "mariadb" ]; then
        shift 1

        if [ "$EXEC" == "yes" ]; then
            $COMPOSE exec mariadb bash
        else
            app_is_not_running
        fi

    # Initiate a Bash shell within the Nginx container...
    elif [ "$1" == "nginx" ]; then
        shift 1

        if [ "$EXEC" == "yes" ]; then
            $COMPOSE exec nginx sh "$@"
        else
            app_is_not_running
        fi

    # Pass unknown commands to the "docker-compose" binary...
    else
        $COMPOSE "$@"
    fi
else
    ${COMPOSE} ps
fi