#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=2

team_display_name=$(ynh_app_setting_get --app=$app --key=team_display_name)
email=$(ynh_user_get_info --username=$admin --key=mail)

#=================================================
# CHECK VERSION
#=================================================

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=1

# # Backup the current version of the app
# ynh_backup_before_upgrade
# ynh_clean_setup () {
#   # Remove the PostgreSQL db in case of error during the migration.
#   if [ -n "$remove_psql_in_case_of_error" ]; then
#     ynh_psql_remove_db --db_user=$db_user --db_name=$db_name
#   fi
#   # Restore it if the upgrade fails
#   ynh_restore_upgradebackup
# }
# # Exit if an error occurs during the execution of the script
# ynh_abort_if_errors

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================

# Save the language used if not present
if [ -z "${language:-}" ]; then
  language="en"
  ynh_app_setting_set --app=$app --key=language --value=$language
fi

# If version setting doesn't exist
if [ -z "${version:-}" ]; then
  version="Enterprise"
  ynh_app_setting_set --app=$app --key=version --value=$version
fi

#=================================================
# MIGRATING DATABASE
#=================================================

# Check if using MariaDB
# This migration should be done before the upgrade
if mysqlshow | grep -q "^| $db_name "; then
    # Mattermost only support MySQL and PostgreSQL (not MariaDB...)
    # Migrate the database from MariaDB to PostgreSQL
    remove_psql_in_case_of_error=1
    mariadb-to-pg
fi

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=3

ynh_systemd_action --service_name=$app --action=stop --log_path="/var/log/$app/$app.log"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
  ynh_script_progression --message="Upgrading source files..." --weight=2

  # Create a temporary directory
  tmpdir="$(mktemp -d)"

  # Backup the config file and local plugins in the temp dir
  cp -a "$install_dir/config/config.json" "$tmpdir/config.json"
  cp -ar "$install_dir/plugins" "$tmpdir/plugins"

  # Remove the app directory securely
  ynh_secure_remove --file="$install_dir"

  if [ "$version" = "Enterprise" ]; then
    ynh_setup_source --dest_dir="$install_dir" --source_id="enterprise_$YNH_ARCH"
  elif [ "$version" = "Team" ]; then
    ynh_setup_source --dest_dir="$install_dir" --source_id="team_$YNH_ARCH"
  fi

  # Copy the admin saved settings and plugins from tmp directory to final path
  cp -a "$tmpdir/config.json" "$install_dir/config/config.json" 
  cp -ar --no-clobber "$tmpdir/plugins" "$install_dir/"

  # Remove the tmp directory securely
  ynh_secure_remove --file="$tmpdir"
fi

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

#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=3

# Create a dedicated NGINX config
ynh_add_nginx_config

# Create a dedicated systemd config
ynh_add_systemd_config

yunohost service add $app --description="Collaboration platform built for developers" --log="/var/log/$app/$app.log"

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# Fix old migrations
#=================================================
# Crazy fix for old unupgraded version
# IMPORTANT: THIS fix should be done after setup new sources and running Mattermost
if ynh_compare_current_package_version --comparison lt --version 5.37.1~ynh1
then
    read -r -d '' fix_old_version_sql << EOM
ALTER TABLE ChannelMembers ALTER COLUMN mentioncountroot SET DEFAULT '0'::bigint;
UPDATE ChannelMembers SET mentioncountroot=0 WHERE mentioncountroot IS NULL;
ALTER TABLE ChannelMembers ALTER COLUMN msgcountroot SET DEFAULT '0'::bigint;
UPDATE ChannelMembers SET msgcountroot=0 WHERE msgcountroot IS NULL;
ALTER TABLE Channels ALTER COLUMN totalmsgcountroot SET DEFAULT '0'::bigint;
UPDATE Channels SET totalmsgcountroot=0 WHERE totalmsgcountroot IS NULL;
UPDATE SidebarCategories SET collapsed=False where collapsed IS NULL;
UPDATE SidebarCategories SET muted=False where muted IS NULL;
UPDATE SidebarCategories set sorting = 'manual' where sorting='';
UPDATE SidebarCategories set sorting = 'manual' where sorting IS NULL;
EOM

    ynh_psql_execute_as_root --sql="$fix_old_version_sql" --database=$db_name

    # Note: it's possible that some instances need other fixes
    # If nothing is displayed in the sidebar it may be needed to change the Id of SidebarCategories...
fi

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=2

# Start a systemd service
ynh_systemd_action --service_name=$app --action=start --log_path=systemd --line_match="Started Mattermost"

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

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