#!/bin/bash

if [ -z "$SERVICE_DATASTORE" ]; then
    echo "This script is meant to be run through 'compose' to work properly." >&2
    exit 1
fi


version=0.1
usage="$exname [-h|--help] [--force|-f] [DBNAME]"
help="
USAGE:

$usage

DESCRIPTION:

Outputs to stdout the odoo zip dump of DBNAME. If DBNAME is not
provided, it'll take the default odoo database from the
${DARKCYAN}postgres-database${NORMAL} relation of current service.

EXAMPLES:

  $exname > dump.zip
  $exname odoo2 > odoo2.zip

"


dbname=
output=
while [ "$1" ]; do
    case "$1" in
        "--help"|"-h")
            print_help >&2
            exit 0
            ;;
        "--force"|"-f")
            force=yes
            ;;
        --*|-*)
            err "Unexpected optional argument '$1'"
            print_usage >&2
            exit 1
            ;;
        *)
            [ -z "$dbname" ] && { dbname=$1 ; shift ; continue ; }
            err "Unexpected positional argument '$1'"
            print_usage >&2
            exit 1
        ;;
    esac
    shift
done


if [ -z "$dbname" ]; then

    ##
    ## Fetch default dbname in relation to postgres-database
    ##

    ## XXXvlab: can't get real config here
    if ! read-0 ts _ _ < <(get_service_relation "$SERVICE_NAME" "postgres-database"); then
        err "Couldn't find relation ${DARKCYAN}postgres-database${NORMAL}."
        exit 1
    fi

    relation_file=$(get_relation_data_dir "$SERVICE_NAME" "$ts" "postgres-database") || {
        err "Failed to find relation file"
        exit 1
    }

    postgres_config=$(cat "$relation_file"/data) || exit 2

    dbname="$(e "$postgres_config" | shyaml get-value dbname)" || {
        err "Couldn't retrieve information of ${DARKCYAN}mysql-database${NORMAL}'s relation."
        exit 1
    }
fi

set -e

## Ensure odoo is launched
service_def=$(get_compose_service_def "$SERVICE_NAME")

## XXXvlab: should be moved to lib
CONFIG=$SERVICE_CONFIGSTORE/etc/odoo-server.conf
ADMIN_PASSWORD=$(echo "$service_def" | shyaml -q get-value options.admin-password) || {
    if [ -e "$CONFIG" ]; then
        ADMIN_PASSWORD=$(grep ^admin_passwd "$CONFIG" | sed -r 's/^admin_passwd\s+=\s+(.+)$/\1/g')
    fi
    if [ -z "$ADMIN_PASSWORD" ]; then
        err "Could not find 'admin-password' in $SERVICE_NAME service definition nor in config file."
        exit 1
    fi
}

containers="$(get_running_containers_for_service "$SERVICE_NAME")"

if [ -z "$containers" ]; then
    err "No containers running for service $DARKYELLOW$SERVICE_NAME$NORMAL."
    die "Please ensure that $DARKYELLOW$SERVICE_NAME$NORMAL is running before using '$exname'."
fi

## XXXvlab: taking first container is probably not a good idea
container="$(echo "$containers" | head -n 1)"

## XXXvlab: taking first ip is probably not a good idea
read-0 container_network container_ip < <(get_container_network_ip "$container")

DEFAULT_CURL_IMAGE=${DEFAULT_CURL_IMAGE:-docker.0k.io/curl}


check_output() {
    local chars
    read -n 2 -r chars
    if [ "$chars" != "PK" ]; then
        out=$(cat)
        errmsg=$(echo "$out" | grep "alert-danger")
        errmsg=${errmsg#*>}
        errmsg=${errmsg%%<*}
        if [ -n "$errmsg" ]; then
            errmsg=$(echo "$errmsg" | recode html..utf8)
            die "$errmsg"
        fi
        err "Unexpected output not matching ZIP signature. Dump probably failed."
        exit 1
    fi
    {
        echo -n "$chars"
        cat
    }
}


cmd=(
    docker run --rm --network "$container_network"
        "$DEFAULT_CURL_IMAGE"
        -sS
        -X POST
        -F "master_pwd=${ADMIN_PASSWORD}"
        -F "name=${dbname}"
        -F "backup_format=zip"
        http://${container_ip}:8069/web/database/backup
)

## XXXvlab: contains password, left only for advanced debug
#debug "${cmd[@]}"

set -o pipefail
"${cmd[@]}" | check_output &&
    info "Requested odoo '$dbname' dump and outputted result to stdout."