#!/bin/bash
# "dev" is an utility script speeding up different development tasks and actions.
# To find out what options are available, run it without any arguments.

# Text styles
RED='\033[0;31m'
BOLD=$(tput bold)
NORMAL=$(tput sgr0)

# Required ports
# Some tasks test for those ports before continuing
port_django=${MISAGO_DEVSERVER_PORT:-8000}
port_postgresql=5432

required_ports=($port_postgresql $port_django)

# Default superuser
username="Admin"
password="password"
email="admin@example.com"

# Utility functions used by action commands
error() {
    echo -e "${RED}Error:${NORMAL} $1"
}

require_in_docker() {
    if [[ ! $IN_MISAGO_DOCKER = 1 ]]; then
        error "This command can only be ran inside the running Misago docker container."
        exit 1
    fi
}

wait_for_db() {
    require_in_docker

    export PGPASSWORD=$POSTGRES_PASSWORD
    RETRIES=10

    until psql -h $POSTGRES_HOST -U $POSTGRES_USER -d $POSTGRES_DB -c "select 1" > /dev/null 2>&1 || [ $RETRIES -eq 0 ]; do
        echo "Waiting for PostgreSQL to start, $((RETRIES--)) remaining attempts..."
        sleep 2
    done
}

# Check if user has docker-compose
if [[ ! $IN_MISAGO_DOCKER = 1 ]]; then
    if ! command -v docker >/dev/null 2>&1; then
        error "You need to have Docker installed to use this tool."
        echo
        echo "Docker release for your system can be downloaded for free from this page:"
        echo "https://www.docker.com/get-started"
        echo
        exit 1
    fi
    if ! command -v docker-compose >/dev/null 2>&1; then
        error "You need to have Docker Compose installed to use this tool."
        echo
        echo "Docker release for your system can be downloaded for free from this page:"
        echo "https://www.docker.com/get-started"
        echo
        exit 1
    fi
fi

# Commands
intro() {
    echo "Usage: ./dev [arg] ..."
    echo "Arguments grouped by type:"
    echo
    echo "Development project:"
    echo
    echo "    ${BOLD}init${NORMAL}              initialize dev database for development."
    echo "    ${BOLD}afterinit${NORMAL}         repeat help message displayed after init command is complete."
    echo "    ${BOLD}clear${NORMAL}             clear media and userdata dirs and destroy docker containers."
    echo "    ${BOLD}rebuild${NORMAL}           rebuild docker containers."
    echo "    ${BOLD}reset${NORMAL}             run clear followed by init."
    echo
    echo "    Both init and rebuild args can be followed with any number of extra args and options that should be appended to docker-compose build."
    echo
    echo "Testing:"
    echo
    echo "    ${BOLD}test${NORMAL}              run tests suite using pytest."
    echo
    echo "Translations:"
    echo
    echo "    ${BOLD}makemessages${NORMAL}      update translation files for \"en\" language."
    echo "    ${BOLD}makemessages lang${NORMAL} update translation files for \"lang\" language."
    echo "    ${BOLD}compilemessages${NORMAL}   compile translation files to \"mo\" format."
    echo "    ${BOLD}txpull${NORMAL}            pull translations from Transifex."
    echo "    ${BOLD}txpush${NORMAL}            push new source files to Transifex."
    echo "    ${BOLD}txsync${NORMAL}            runs entire process of syncing translations with Transifex."
    echo
    echo "Shortcuts:"
    echo
    echo "    ${BOLD}manage.py${NORMAL}         runs \"python manage.py\" inside docker."
    echo "    ${BOLD}bash${NORMAL}              starts bash session inside running Misago container."
    echo "    ${BOLD}run${NORMAL}               runs \"docker-compose run --rm misago\"."
    echo "    ${BOLD}psql${NORMAL}              runs psql connected to development database."
    echo "    ${BOLD}pyfmt${NORMAL}             runs isort + black on python code."
    echo "    ${BOLD}fakedata${NORMAL}          populates database with testing data."
    echo "    ${BOLD}fakebigdata${NORMAL}       populates database with LARGE amount of testing data."
    echo
}

# Handle invalid argument
invalid_argument() {
    echo -e "Invalid argument: ${RED}$1${NORMAL}"
    echo "Please run this script without any arguments to see the list of available arguments."
    exit 1
}

# Initialize new dev project
init() {
    for port in "${required_ports[@]}"; do
        nc "127.0.0.1" "$port" < /dev/null
        if [[ $? = "0" ]]; then
            if [[ $port = $port_django ]]; then
                error "Other application appears to already be running on http://127.0.0.1:${port_django}"
            elif [[ $port = $port_postgresql ]]; then
                error "PostgreSQL appears to already be running on the port $port."
                echo
                echo "Misago runs its own PostgreSQL instance in the docker container and uses port $port to expose it to other programs."
                echo "Please stop your PostgreSQL server and try again."
                echo
            fi
            exit 1
        fi
    done
    
    docker-compose stop
    docker-compose build --pull --force-rm "${@:2}"
    docker-compose run --rm misago ./dev init_in_docker
}

# Initialization step that has to occur inside docker
init_in_docker() {
    require_in_docker
    wait_for_db
    # migrate the database
    python manage.py migrate
    # create superuser Admin with password "password"
    python manage.py createsuperuser --username $username --email $email --password $password

    # display after init message
    echo
    echo "================================================================================"
    after_init_message
}

# After-init message
after_init_message() {
    echo
    echo "You can now start the development server using:"
    echo
    echo "    docker-compose up"
    echo
    echo "Running server will be available in the browser under the http://127.0.0.1:${port_django} address."
    echo
    echo "Default superuser has been created with this username and password:"
    echo
    echo "Username:    $username"
    echo "Password:    $password"
    echo
    echo "To connect to development database use following credentials:"
    echo
    echo "User:         misago"
    echo "Password:     misago"
    echo "Database:     misago"
    echo "Host:         postgres"
    echo "Port:         5432"
    echo
    echo "Note: development server must be running for connection to be possible."
    echo
}

# Clear existing dev project
clear() {
    echo -e "${RED}Warning:${NORMAL} You are going to delete media files created during development and destroy docker containers."
    echo

    devproject_path="$(pwd)/devproject"

    echo "Enter \"y\" to confirm:"

    read confirmation
    if [[ $confirmation = "y" ]]; then
        docker-compose stop
        docker-compose down --remove-orphans
        find $devproject_path/media -mindepth 1 ! -name '.gitignore' -delete
        find $devproject_path/userdata -mindepth 1 ! -name '.gitignore' -delete
    else
        echo "Operation canceled."
    fi
}

# Rebuild docker containers
rebuild() {
    docker-compose stop
    docker-compose build --pull --force-rm "${@:2}"
}

# Run tests suite
test() {
    docker-compose run --rm misago pytest "${@:2}"
}

# Make messages
makemessages() {
    docker-compose run --rm --no-deps misago ./dev makemessages_in_docker $1
}

# Docker part of makemessages
makemessages_in_docker() {
    require_in_docker
    cd ./misago

    if [[ $1 ]]; then
        echo "Extracting messages for $1 language:"
        echo "Processing .py and .html files..."
        django-admin makemessages -l $1 --no-obsolete -e html,txt,py > /dev/null

        echo "Processing .js files..."
        django-admin makemessages -l $1 --no-obsolete -d djangojs > /dev/null
    else
        echo "Extracting messages for all languages:"
        django-admin makemessages --all --no-obsolete -e html,txt,py > /dev/null
        django-admin makemessages --all --no-obsolete -d djangojs > /dev/null
    fi
}

# Compile messages
compilemessages() {
    docker-compose run --rm --no-deps misago ./dev compilemessages_in_docker
}

# Docker part of compile messages
compilemessages_in_docker() {
    require_in_docker
    cd ./misago
    django-admin compilemessages
}

# Pull translation files from transifex
txpull() {
    tx pull -a
    compilemessages
}

# Push translation sources to transifex
txpush() {
    tx push --source
}

# Shortcut for starting bash session in running container
run_bash() {
    docker exec -it misago_misago_1 bash
}

# Shortcut for docker-compose run --rm misago python manage.py
run_managepy() {
    docker-compose run --rm misago python manage.py "${@:2}"
}

# Shortcut for docker-compose run --rm misago...
docker_run() {
    docker-compose run --rm misago "${@:2}"
}

# Shortcut for psql
run_psql() {
    docker-compose run --rm misago ./dev psql_in_docker
}

# Docker part of psql shortcut
psql_in_docker() {
    wait_for_db
    PGPASSWORD=$POSTGRES_PASSWORD psql --username $POSTGRES_USER --host $POSTGRES_HOST $POSTGRES_DB
}

# Shortcut for creating small dev forum
create_fake_data() {
    docker-compose run --rm misago python manage.py createfakecategories 7
    docker-compose run --rm misago python manage.py createfakecategories 12 1
    docker-compose run --rm misago python manage.py createfakehistory 600
}

# Shortcut for creating big dev forum
create_fake_bigdata() {
    docker-compose run --rm misago python manage.py createfakecategories 48
    docker-compose run --rm misago python manage.py createfakecategories 24 1
    docker-compose run --rm misago python manage.py createfakehistory 2190 120
}

# Command dispatcher
if [[ $1 ]]; then
    if [[ $1 = "init" ]]; then
        init $@
    elif [[ $1 = "init_in_docker" ]]; then
        init_in_docker
    elif [[ $1 = "afterinit" ]]; then
        after_init_message
    elif [[ $1 = "clear" ]]; then
        clear
    elif [[ $1 = "reset" ]]; then
        clear
        init $@
    elif [[ $1 = "rebuild" ]]; then
        rebuild $@
    elif [[ $1 = "test" ]]; then
        test $@
    elif [[ $1 = "makemessages" ]]; then
        makemessages $2
    elif [[ $1 = "makemessages_in_docker" ]]; then
        makemessages_in_docker $2
    elif [[ $1 = "compilemessages" ]]; then
        compilemessages
    elif [[ $1 = "compilemessages_in_docker" ]]; then
        compilemessages_in_docker
    elif [[ $1 = "txpull" ]]; then
        txpull
    elif [[ $1 = "txpush" ]]; then
        txpush
    elif [[ $1 = "txsync" ]]; then
        rm -rf ./misago/locale/en
        makemessages en
        txpush
        txpull
        compilemessages
    elif [[ $1 = "bash" ]]; then
        run_bash
    elif [[ $1 = "manage.py" ]]; then
        run_managepy $@
    elif [[ $1 = "run" ]]; then
        docker_run $@
    elif [[ $1 = "psql" ]]; then
        run_psql
    elif [[ $1 = "psql_in_docker" ]]; then
        psql_in_docker
    elif [[ $1 = "pyfmt" ]]; then
        isort -rc misago
        black devproject misago
    elif [[ $1 = "fakedata" ]]; then
        create_fake_data
    elif [[ $1 = "fakebigdata" ]]; then
        create_fake_bigdata
    else
        invalid_argument $1
    fi
else
    intro
fi