#!/bin/bash

## Init is run on host
## For now it is run every time the script is launched, but
## it should be launched only once after build.

## Accessible variables are:
## - SERVICE_NAME        Name of current service
## - DOCKER_BASE_IMAGE   Base image from which this service might be built if any
## - SERVICE_DATASTORE           Location on host of the DATASTORE of this service
## - SERVICE_CONFIGSTORE         Location on host of the CONFIGSTORE of this service

. lib/common

# Please note that postgres detect on its own if its datadir needs to be populated

service_def=$(get_compose_service_def "$SERVICE_NAME") || return 1
options="$(e "$service_def" | shyaml -y get-value options)" || true


SYNAPSE_OPTIONS=(
    report-stats:bool        ## Enable anon stat reporting back to the Matrix project
    enable-registration:bool ## Enable registration on the Synapse instance.
    allow-guest:bool         ## allow guest joining this server.
    event-cache-size:size    ## event cache size [default 10K].
    max-upload-size:size     ## max upload size [default 10M].

    ## shared secrets
    registration-shared-secret:string  ## registrering users if registration is disable.
    macaroon-secret-key:string         ## secret for signing access tokens to the server.

    ## recaptcha
    recaptcha-public-key:string  ## required in order to enable recaptcha upon registration
    recaptcha-private-key:string ## required in order to enable recaptcha upon registration

    ## turn
    turn-uris:string             ## coma-separated list of TURN uris to enable TURN for this homeserver.
    turn-secret:string           ## TURN shared secret if required.
)

OPTIONS_CONCAT=" ${SYNAPSE_OPTIONS[*]} "

yaml_opts=()
while read-0 key val; do
    key_option="$key"
    case "$OPTIONS_CONCAT" in
        *" ${key_option}:bool "*)
            case "${val,,}" in
                true|ok|yes|y|1)
                    val="\"yes\""
                    ;;
                false|ko|nok|no|n|0)
                    val="\"no\""
                    ;;
                *)
                    die "Invalid value for ${WHITE}$key$NORMAL, please use a boolean value."
                    ;;
            esac
            ;;
        *" ${key_option}:numeric "*)
            if ! is_int "$val"; then
                die "Invalid value for ${WHITE}$key$NORMAL, please use numeric value."
            fi
            ;;
        *" ${key_option}:string "*)
            :
            ;;
        *" ${key_option}:size "*)
            [[ "${val}" =~ ^[0-9\.]+[KkMmGgTtPp]$ ]] || {
                die "Unknown size specification '${val}'."
            }
            ;;
        *)
            case "${key//_/-}" in
                *) die "Unknown option ${WHITE}$key$NORMAL.";;
            esac
            continue
            ;;
    esac
    yaml_opts+=("$key" "$val")
done < <(e "$options" | yaml_opt_flatten)

config="\
$SERVICE_NAME:
  environment:
    SYNAPSE_NO_TLS: \"yes\"
"

while read-0 key value; do
    key=${key//-/_}
    config+="$(printf "\n    SYNAPSE_%s: %s" "${key^^}" "$value")"
done < <(array_values_to_stdin yaml_opts)

init-config-add "$config"