#!/bin/bash

ynh::apps::list() {
    yunohost app list --output-as json --quiet | jq -r '.apps[].id'
}


# Install others YunoHost apps
#
# usage: ynh_install_apps --apps="appfoo?domain=domain.foo&path=/foo appbar?domain=domain.bar&path=/bar&admin=USER&language=fr&is_public=1&pass?word=pass&port=666"
# | arg: -a, --apps=     - apps to install
#
# Requires YunoHost version *.*.* or higher.
ynh::apps::install() {
    local -a apps=()
    arguments::parse \
        "-a|--apps)apps;Array,R" \
        -- "${@+$@}"

    local -a installed_apps
    mapfile -t installed_apps < <(ynh::apps::list)

    for app_and_args in "${apps[@]}"; do
        local app_name app_args
        app_name="$(cut -d "?" -f1 <<< "$app_and_args")"
        app_args="$(cut -d "?" -f2- -s <<< "$app_and_args")"
        if string::empty "$app_name"; then
            log::panic "You didn't provided a YunoHost app to install"
        fi

        yunohost tools update apps

        if list::contains "$app_name" "${installed_apps[@]}"; then
            # App already installed, upgrade it
            yunohost app upgrade "$app_name"
        else
            # Install the app with its arguments
            yunohost app install "$app_name" "$app_args"
        fi
    done

    ynh::setting::set --key "apps_dependencies" --value "$(array::join ", " "${apps[@]}")"
}

# Remove other YunoHost apps
#
# Other YunoHost apps will be removed only if no other apps need them.
#
# usage: ynh_remove_apps
#
# Requires YunoHost version *.*.* or higher.
ynh::apps::remove_deps() {
    local -a to_remove
    string::split_to to_remove ", " "$(ynh::setting::get --key "apps_dependencies")"
    ynh::setting::delete --key "apps_dependencies"

    # Make the array of reverse dependencies
    local -A reverse_deps
    for app in $(ynh::apps::list); do
        local -a app_deps
        string::split_to app_deps ", " "$(ynh::setting::get --app="$app" --key=apps_dependencies)"
        for dep in "${app_deps[@]}"; do
            reverse_deps[$dep]="${reverse_deps[$dep]}, $app"
        done
    done

    # Now remove all deps that have no other reverse dependencies
    for app in "${to_remove[@]}"; do
        if string::empty "${reverse_deps[$app]}"; then
            log::info "Removing $app..."
            yunohost app remove "$app" --purge
        else
            log::info "$app was not removed because it's still required by ${reverse_deps[$app]}."
        fi
    done
}

# Spawn a Bash shell with the app environment loaded
#
# usage: ynh_spawn_app_shell --app="app"
#     | arg: -a, --app=     - the app ID
#
# examples:
#   ynh_spawn_app_shell --app="APP" <<< 'echo "$USER"'
#   ynh_spawn_app_shell --app="APP" < /tmp/some_script.bash
#
# Requires YunoHost version 11.0.* or higher, and that the app relies on packaging v2 or higher.
# The spawned shell will have environment variables loaded and environment files sourced
# from the app's service configuration file (defaults to $app.service, overridable by the packager with `service` setting).
# If the app relies on a specific PHP version, then `php` will be aliased that version. The PHP command will also be appended with the `phpflags` settings.
ynh::apps::shell_into() {
    local app
    arguments::parse \
        "-a|--app)apps;String,R" \
        -- "${@+$@}"


    # Force Bash to be used to run this helper
    if [[ ! "$0" =~ \/?bash$ ]]; then
        log::panic "Please use Bash as shell."
    fi

    # Make sure the app is installed
    local installed_apps
    mapfile -t installed_apps < <(ynh::apps::list)
    if ! array::contains "$app" installed_apps; then
        log::panic "$app is not in the apps list"
    fi

    # Make sure the app has its own user
    if ! id -u "$app" &>/dev/null; then
        log::panic "There is no '$app' system user"
    fi

    # Make sure the app has an install_dir setting
    local install_dir
    install_dir="$(ynh::setting::get --app "$app" --key install_dir)"
    if string::empty "$install_dir"; then
        log::panic "$app has no install_dir setting (does it use packaging format >=2?)"
    fi

    # Load the app's service name, or default to $app
    local service
    service="$(ynh::setting::get --app "$app" --key service)"
    if string::empty "$service"; then
        service="$app"
    fi

    # Load the service variables
    local -a env_vars
    string::split_to env_vars " " "$(systemctl show "$service.service" -p "Environment" --value)"

    local -a env_files
    string::split_to env_files " " "$(systemctl show "$service.service" -p "EnvironmentFiles" --value)"

    local env_dir
    env_dir="$(systemctl show "$service.service" -p "WorkingDirectory" --value)"

    # Force `php` to its intended version
    # We use `eval`+`export` since `alias` is not propagated to subshells, even with `export`
    local phpversion phpflags
    phpversion="$(ynh::setting::get --app "$app" --key phpversion)"
    phpflags="$(ynh::setting::get --app "$app" --key phpflags)"
    if ! string::empty "$phpversion"; then
        phpstring="php() { php${phpversion} ${phpflags} \"\$@\"; }"
    fi

    (
        export HOME="$install_dir"
        for var in "${env_vars[@]}"; do
            export "${var?}"
        done
        for file in "${env_files[@]}"; do
            set -a
            source "$file"
            set +a
        done

        if ! string::empty "$phpstring"; then
            eval "${phpstring:-}"
            export -f php
        fi

        if ! string::empty "$env_dir"; then
            cd "$env_dir"
        fi
        su -s /bin/bash "$app"
    )
}