#!/bin/bash

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

# Load common variables and helpers
source ./experimental_helper.sh

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=3

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
secret_key=$(ynh_app_setting_get --app=$app --key=secret_key)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..." --weight=1

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=30

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/var/www/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
fi

#=================================================
# MIGRATION FROM Garradin
#=================================================

[[ $YNH_APP_ID == "garradin" ]] \
    && [[ "$(cat "$final_path/VERSION")" != 1.2.2 ]] \
    && ynh_die --message "It look like that you have an old Garradin install. You need first upgrade Garradin instance (id: $garradin_migrate_id) and after migrate to Paheko."
ynh_handle_app_migration --migration_id=garradin --migration_list=garradin_migrations

if [[ $migration_process -eq 1 ]]; then
    # Replace the user
    ynh_system_user_delete --username="$old_app"
        useradd -d "$final_path" --system --user-group "$app" || \
            ynh_die --message "Unable to create $app system account"

#=================================================
# STANDARD UPGRADE STEPS
#=================================================

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir="$final_path"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=5

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path" --keep="association.sqlite squelettes/ data/ skel-dist/ config.local.user.php"
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=2

# Create a dedicated PHP-FPM config
ynh_add_fpm_config

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=5

if ynh_compare_current_package_version --comparison lt --version 1.1.15~ynh1; then
	ynh_add_config --template="config.local.user.php" --destination="$final_path/config.local.user.php"
fi

ynh_add_config --template="config.local.php" --destination="$final_path/config.local.php"
ynh_add_config --template="config.local.yunohost.php" --destination="$final_path/config.local.yunohost.php"
# NOTE: Don't overwrite config.local.user.php

# Permissions on files and directories
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"
find "$final_path" -type d -exec chmod 550 {} +
find "$final_path" -type f -exec chmod 440 {} +
find "$final_path/data" -type d -exec chmod 770 {} +
find "$final_path/data" -type f -exec chmod 660 {} +
chmod 440 "$final_path/config.local.php"
chmod 440 "$final_path/config.local.yunohost.php"
chmod 660 "$final_path/config.local.user.php"

#=================================================
# FINALISE UPGRADE
#=================================================
ynh_script_progression --message="Finalise upgrade" --weight=1

ynh_local_curl "/admin/index.php"
sleep 5
ynh_local_curl "/index.php"

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# FINISH MIGRATION PROCESS
#=================================================

if [[ $migration_process -eq 1 ]]; then
    echo "Garradin has been successfully migrated to Paheko! \
A last scheduled operation will run in a couple of minutes to finish the \
migration in YunoHost side. Do not proceed any application operation while \
you don't see Garradin as installed." >&2

    # Execute a post migration script after the end of this upgrade.
    # Mainly for some cleaning
    script_post_migration=garradin_post_migration.sh
    ynh_replace_string --match_string __OLD_APP__ --replace_string "$old_app" --target_file ../conf/$script_post_migration
    ynh_replace_string --match_string __NEW_APP__ --replace_string "$app" --target_file ../conf/$script_post_migration
    cp ../conf/$script_post_migration /tmp
    chmod +x /tmp/$script_post_migration
    (cd /tmp; echo "/tmp/$script_post_migration > /tmp/$script_post_migration.log 2>&1" | at now + 2 minutes)
fi

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

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