#!/bin/bash

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

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

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

# Get "is_internal_users" and set as lowercase
is_internal_users=${YNH_ACTION_IS_INTERNAL_USERS,,}

# Get the full name of the app, Example: strut__3
app=$YNH_APP_INSTANCE_NAME

admin=$(ynh_app_setting_get $app admin)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)

auth_backend_old=$(ynh_app_setting_get $app auth_backend)
is_internal_users_old=$(ynh_app_setting_get $app is_internal_users)

#=================================================
# CHECK IF ARGUMENTS AND REQUIREMENTS ARE CORRECT
#=================================================

# Ensure that app is public
if [ $is_public -eq 0 ]; then
    ynh_die "Wiki must be public if you want your people to be able to reach it. Run 'public_private' and come back here" 1
fi

#=================================================
# CHECK IF AN ACTION HAS TO BE DONE
#=================================================

if [ $is_internal_users -eq $is_internal_users_old ]
then
    ynh_die "is_internal_users is already set as $is_internal_users." 0
fi

#=================================================
# SPECIFIC ACTION
#=================================================

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different "$final_path/conf/local.protected.php"

# Always overwrite local file with the one from package.
cp conf/local.protected.php $final_path/conf


if [ $is_internal_users -eq 1 ]; then
    auth_backend="authchained"

    # Automatically install "authchained" plugin
    # Allows to use multiple users backend storage : LDAP + internal DokuWiki users
    # See https://www.dokuwiki.org/plugin:authchained?s[]=chained

    plugin_archive=dokuwiki-plugin-authchained.tar.gz
    wget -nv --quiet 'https://github.com/rztuc/dokuwiki-plugin-authchained/archive/master.tar.gz' -O "$plugin_archive" -o /dev/null || true

    # if "file is not zero size"
    if [ -s "$plugin_archive" ]; then

        tmpdir="$(ynh_smart_mktemp --min_size=1)"   # Create a 1mb temporary folder
        tar xzf "$plugin_archive" -C "$tmpdir"      # Extract plugin to the temp folder

        # Extract the "base" field from the plugin archive to create plugin folder name
        # See https://www.dokuwiki.org/devel:plugin_info
        #
        # 'wildcard' is used to avoid having to find the name of the subfolder
        # It should not change later but who knows...
        plugin_folder_name=$(cat $tmpdir/*/plugin.info.txt | grep url | awk -F ':' '{print $3}')

        # Define the path where plugin has to be installed
        plugin_finalpath="$final_path/lib/plugins/$plugin_folder_name"
        mkdir -p $plugin_finalpath
        
        # Copy plugin files to DokuWiki plugin directory
        # Doesn't work with "mv" so "cp" instead (taken from "upgrade" script)
        cp -a $tmpdir/*/. "$plugin_finalpath/"
        
        # Cleaning
        ynh_secure_remove --file="$tmpdir"

        # Set filesystem rights for new plugin
        chown -R $app:root $plugin_finalpath
    fi
else
    auth_backend="authldap"
    # TODO: Disable/remove "authchained"


    ##$plugins['authchained'] = 0;    in   plugins.local.php
    #
    #
    ## Use a "sub process" to start a new shell to run these commands
	## Allow to use only one "cd" and to be more efficent
	#(
    #    cd $final_path/conf
    #
    #    cp plugins.local.php plugins.local.php.bak
    #
    #    # Search if configuration in "config file" is present for plugin to work
    #    ## -F, --fixed-strings
    #    ##   Interpret  PATTERN  as a list of fixed strings (instead of regular expressions), separated by newlines, any of which is to
    #    ##   be matched.
    #    ## -q, --quiet, --silent
    #    ##   Quiet; do not write anything to standard output.  Exit immediately with zero status if any match  is  found,  even  if  an
    #    ##   error was detected.  Also see the -s or --no-messages option.
    #    grep --quiet --fixed-strings '$plugins['authchained'] = 0;' "plugins.local.php"
    #    if [ $? -ne 0 ]; then
    #            echo "not found in file"
    #            # If not found, add the setting to "local.protected.php" which can only be edited by Yunohost
    #            # "\$conf" needs the "\" to espace the dollar and avoid echo to interprate it as a (void) variable
    #            #echo "\$conf['plugin']['authchained']['authtypes'] = 'authldap:authplain';" >> "$final_path/conf/local.protected.php"
    #    else
    #        echo "not found in file"
    #    fi
    #    # source: https://stackoverflow.com/questions/3557037/appending-a-line-to-a-file-only-if-it-does-not-already-exist
    #
    #)
fi


# Set the authentification backend
ynh_replace_string "__YNH_AUTH_BACKEND__" "$auth_backend" "$final_path/conf/local.protected.php"
# Set the "admin" user
ynh_replace_string "__YNH_ADMIN_USER__"   "$admin"        "$final_path/conf/local.protected.php"

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum "$final_path/conf/local.protected.php"

# Purge cache; see https://www.dokuwiki.org/faq:pluginproblems#cache
touch $final_path/conf/local.php

# Update the config of the app
ynh_app_setting_set $app auth_backend      $auth_backend
ynh_app_setting_set $app is_internal_users $is_internal_users