#!/usr/bin/env bash
#
# Copyright (c) 2024 YunoHost Contributors
#
# This file is part of YunoHost (see https://yunohost.org)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

# Get an application setting
#
# usage: ynh_app_setting_get --key=key
# | arg: --app=     - the application id (global $app by default)
# | arg: --key=     - the setting to get
ynh_app_setting_get() {
    # ============ Argument parsing =============
    local _globalapp=${app-:}
    local -A args_array=([a]=app= [k]=key=)
    local app
    local key
    ynh_handle_getopts_args "$@"
    app="${app:-$_globalapp}"
    # ===========================================

    ynh_app_setting "get" "$app" "$key"
}

# Set an application setting
#
# When choosing the setting key's name, note that including the following keywords will make the associated setting's value appear masked in the debug logs (cf. [related code](https://github.com/YunoHost/yunohost/blob/216210d5e97070b85c96ebb4548c6abf36987771/src/log.py#L571)): `pwd`, `pass`, `passwd`, `password`, `passphrase`, `secret\w*` (regex),  `\w+key` (regex), `token`, `PASSPHRASE`
# This is meant to allow sharing the logs while preserving confidential data, but having this in mind is useful would you expect to see those values while debugging your scripts.
#
# usage: ynh_app_setting_set --key=key --value=value
# | arg: --app=     - the application id (global $app by default)
# | arg: --key=     - the setting name to set
# | arg: --value=   - the setting value to set
ynh_app_setting_set() {
    # ============ Argument parsing =============
    local _globalapp=${app-:}
    local -A args_array=([a]=app= [k]=key= [v]=value=)
    local app
    local key
    local value
    ynh_handle_getopts_args "$@"
    app="${app:-$_globalapp}"
    # ===========================================

    ynh_app_setting "set" "$app" "$key" "$value"
}

# Set an application setting but only if the "$key" variable ain't set yet
#
# Note that it doesn't just define the setting but ALSO define the $foobar variable
#
# Hence it's meant as a replacement for this legacy overly complex syntax:
#
# ```bash
# if [ -z "${foo:-}" ]
# then
#     foo="bar"
#     ynh_app_setting_set --key="foo" --value="$foo"
# fi
# ```
#
# usage: ynh_app_setting_set_default --key=key --value=value
# | arg: --app=     - the application id (global $app by default)
# | arg: --key=     - the setting name to set
# | arg: --value=   - the default setting value to set
ynh_app_setting_set_default() {
    # ============ Argument parsing =============
    local _globalapp=${app-:}
    local -A args_array=([a]=app= [k]=key= [v]=value=)
    local app
    local key
    local value
    ynh_handle_getopts_args "$@"
    app="${app:-$_globalapp}"
    # ===========================================

    if [ -z "${!key:-}" ]; then
        eval "$key=\$value"
        ynh_app_setting "set" "$app" "$key" "$value"
    fi
}

# Delete an application setting
#
# usage: ynh_app_setting_delete --key=key
# | arg: --app=     - the application id (global $app by default)
# | arg: --key=     - the setting to delete
ynh_app_setting_delete() {
    # ============ Argument parsing =============
    local _globalapp=${app-:}
    local -A args_array=([a]=app= [k]=key=)
    local app
    local key
    ynh_handle_getopts_args "$@"
    app="${app:-$_globalapp}"
    # ===========================================

    ynh_app_setting "delete" "$app" "$key"
}

# Small "hard-coded" interface to avoid calling "yunohost app" directly each
# time dealing with a setting is needed (which may be so slow on ARM boards)
#
# [internal]
#
ynh_app_setting() {
    # Trick to only re-enable debugging if it was set before
    local xtrace_enable=$(set +o | grep xtrace)
    set +o xtrace # set +x
    ACTION="$1" APP="$2" KEY="$3" VALUE="${4:-}" python3 - << EOF
import os, yaml, sys
app, action = os.environ['APP'], os.environ['ACTION'].lower()
key, value = os.environ['KEY'], os.environ.get('VALUE', None)
setting_file = "/etc/yunohost/apps/%s/settings.yml" % app
assert os.path.exists(setting_file), "Setting file %s does not exists ?" % setting_file
with open(setting_file) as f:
    settings = yaml.safe_load(f)
if action == "get":
    if key in settings:
        print(settings[key])
else:
    if action == "delete":
        if key in settings:
            del settings[key]
    elif action == "set":
        settings[key] = value
    else:
        raise ValueError("action should either be get, set or delete")
    with open(setting_file, "w") as f:
        yaml.safe_dump(settings, f, default_flow_style=False)
EOF
    eval "$xtrace_enable"
}

# Legacy: auto-convert phpversion to php_version (for consistency with nodejs_version, ruby_version, ...)
# This has to be here and not in the "php" code file because ynh_app_setting_set/delete need to be defined @_@
if [[ -n "${app:-}" ]] && [[ -n "${phpversion:-}" ]]; then
    if [[ -z "${php_version:-}" ]]; then
        php_version=$phpversion
        ynh_app_setting_set --key=php_version --value="$php_version"
    fi
    ynh_app_setting_delete --key=phpversion
    unset phpversion
fi