#!/bin/bash

#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

# Path for e.g. "static" files, served by nginx:
test ! -e "$public_path" || ynh_die --message="This path already contains a folder"

# Path for own config files, e.g.: Django's settings.py:
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

# Register (book) web path
ynh_webpath_register --app="$app" --domain="$domain" --path_url="$path_url"

mkdir -p "$public_path/media" "$public_path/static"
mkdir -p "$final_path"

mkdir -p "$log_path"
touch "${log_file}"

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..."

ynh_app_setting_set --app="$app" --key=admin --value="$admin"
ynh_app_setting_set --app="$app" --key=is_public --value="$is_public"
ynh_app_setting_set --app="$app" --key=public_path --value="$public_path"
ynh_app_setting_set --app="$app" --key=final_path --value="$final_path"
ynh_app_setting_set --app="$app" --key=log_path --value="$log_file"

ynh_app_setting_set --app="$app" --key=domain --value="$domain"
ynh_app_setting_set --app="$app" --key=path --value="$path_url"

# Find a free port
port=$(ynh_find_port --port=8000)
# Set port as application setting
# https://github.com/YunoHost/yunohost/blob/dev/data/helpers.d/setting
ynh_app_setting_set --app="$app" --key=port --value="$port"

db_pwd=$(ynh_app_setting_get --app="$app" --key=psqlpwd)
admin_mail=$(ynh_user_get_info --username="$admin" --key=mail)
redis_db=$(ynh_redis_get_free_db)

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=40

ynh_exec_warn_less ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# CREATE A PostgreSQL DATABASE
#=================================================
ynh_script_progression --message="Creating a PostgreSQL database..."

db_name=$(ynh_sanitize_dbid --db_name="$app")
db_user=$db_name
ynh_app_setting_set --app="$app" --key=db_name --value="$db_name"

ynh_psql_test_if_first_run

# Initialize database and store postgres password for upgrade
ynh_psql_setup_db --db_user="$db_user" --db_name="$db_name"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring nginx web server..."

# Create a dedicated nginx config
# https://github.com/YunoHost/yunohost/blob/dev/data/helpers.d/nginx
ynh_add_nginx_config "public_path" "port"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..."

# A home directory for venv and settings etc.
ynh_system_user_create --username="$app" --home_dir="$final_path" --use_shell

#=================================================
# PIP INSTALLATION
#=================================================
ynh_script_progression --message="Install project via pip..." --weight=80

python3 -m venv "${final_path}/venv"
cp ../conf/requirements.txt "$final_path/requirements.txt"
chown -R "$app:" "$final_path"

#run source in a 'sub shell'
(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	ynh_exec_as $app $final_path/venv/bin/pip install --upgrade wheel pip
	ynh_exec_as $app $final_path/venv/bin/pip install --no-deps --prefer-binary -r "$final_path/requirements.txt"
)

#=================================================
# copy config files
# ================================================
ynh_script_progression --message="Create project configuration files..."

gunicorn_conf="$final_path/gunicorn.conf.py"
cp "../conf/gunicorn.conf.py" "$gunicorn_conf"
ynh_replace_string --match_string="__FINAL_HOME_PATH__" --replace_string="$final_path" --target_file="$gunicorn_conf"
ynh_replace_string --match_string="__LOG_FILE__" --replace_string="$log_file" --target_file="$gunicorn_conf"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$gunicorn_conf"
ynh_store_file_checksum --file="$gunicorn_conf"

cp ../conf/manage.py "$final_path/manage.py"
chmod +x "$final_path/manage.py"

settings="$final_path/settings.py"
cp "../conf/settings.py" "$settings"

ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="$settings"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$settings"
ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$settings"
ynh_replace_string --match_string="__ADMINMAIL__" --replace_string="$admin_mail" --target_file="$settings"
ynh_replace_string --match_string="__FINAL_HOME_PATH__" --replace_string="$final_path" --target_file="$settings"
ynh_replace_string --match_string="__FINAL_WWW_PATH__" --replace_string="$public_path" --target_file="$settings"
ynh_replace_string --match_string="__LOG_FILE__" --replace_string="$log_file" --target_file="$settings"
ynh_replace_string --match_string="__REDIS_DB__" --replace_string="$redis_db" --target_file="$settings"

ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$settings"
ynh_replace_string --match_string="__PATH_URL__" --replace_string="$path_url" --target_file="$settings"

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$settings"

ynh_app_setting_set --app="$app" --key=redis_db --value="$redis_db"

cp ../conf/setup_user.py "$final_path/setup_user.py"
cp ../conf/urls.py "$final_path/urls.py"
cp ../conf/wsgi.py "$final_path/wsgi.py"

touch "$final_path/local_settings.py"

#=================================================
# MIGRATE / COLLECTSTATIC / CREATEADMIN
#=================================================
ynh_script_progression --message="migrate/collectstatic/createadmin..." --weight=10

(
    set +o nounset
    source "${final_path}/venv/bin/activate"
    set -o nounset
    cd "${final_path}"

    # Just for debugging:
    ./manage.py diffsettings

    ./manage.py migrate --no-input
    ./manage.py collectstatic --no-input

	# Create/update Django superuser (set unusable password, because auth done via SSOwat):
	./manage.py create_superuser --username="$admin" --email="$admin_mail"

    # Check the configuration
    # This may fail in some cases with errors, etc., but the app works and the user can fix issues later.
    ./manage.py check --deploy || true
)

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..."

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate "$log_file"

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add $app --description="Web based management to catalog things" --log="${log_file}"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions to app files
chown -R "$app:" "$log_path"
chown -R "$app:" "$public_path"
chown -R "$app:" "$final_path"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..."

# https://github.com/YunoHost/yunohost/blob/dev/data/helpers.d/systemd
ynh_add_systemd_config --service="$app" --template="django-for-runners.service"

#=================================================
# Start for_runners via systemd
#=================================================
ynh_script_progression --message="Starting project services..." --weight=5

ynh_systemd_action --service_name="$app" --action="start"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..."

ynh_systemd_action --service_name="nginx" --action="reload"

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Installation of $app completed" --last