#!/bin/sh

set -e
set -u
set -x


usage() {
                cat <<END
ERROR: you need to map your idhub git repo volume to docker, suggested volume mapping is:

    volumes:
      - ./IdHub:/opt/idhub
END
                exit 1
}

inject_env_vars() {
        # related https://www.kenmuse.com/blog/avoiding-dubious-ownership-in-dev-containers/
        git config --global --add safe.directory "${idhub_dir}"
        export GIT_COMMIT="$(git log --pretty=format:'%h' -n 1)"

        # enable dev flags when DEVELOPMENT deployment
        case "${DEPLOYMENT}" in
                DEVELOPMENT)
                        export DEBUG=True
                        export DEVELOPMENT=True
                        ;;
                PILOTS_EARLY)
                        export DEBUG=True
                        export DEVELOPMENT=False
                        ;;
        esac
}

deployment_strategy() {
        # detect if existing deployment (TODO only works with sqlite)
        if [ -f "${idhub_dir}/db.sqlite3" ]; then
                echo "INFO: detected EXISTING deployment"
                ./manage.py makemigrations
                ./manage.py migrate
        else
                # move the migrate thing in docker entrypoint
                #   inspired by https://medium.com/analytics-vidhya/django-with-docker-and-docker-compose-python-part-2-8415976470cc
                echo "INFO detected NEW deployment"
                ./manage.py migrate

                case "${DEPLOYMENT}" in
                        DEVELOPMENT|PILOTS_EARLY)
                                printf "This is DEVELOPMENT/PILOTS_EARLY DEPLOYMENT: including demo hardcoded data\n  creating initial Datas\n" >&2
                                ./manage.py initial_datas

                                if [ "${RESPONSE_URI:-}" ]; then
                                        config_oidc4vp
                                fi
                                ;;
                        PROD)
                        printf "creating superuser \n  user: ${DJANGO_SUPERUSER_USERNAME}\n  password: ${DJANGO_SUPERUSER_PASSWORD}\n  email: ${DJANGO_SUPERUSER_EMAIL}\n" >&2
                        ## thanks https://stackoverflow.com/questions/6244382/how-to-automate-createsuperuser-on-django/59467533#59467533
                        ./manage.py createsuperuser --no-input
                esac
        fi
}

_set() {
        key="${1}"
        value="${2}"
        response_uri="${3}"
        sqlite3 db.sqlite3 "update oidc4vp_organization set ${key}='${value}' where response_uri='${response_uri}';"
}

_get() {
        sqlite3 -json db.sqlite3 "select * from oidc4vp_organization;"
}

config_oidc4vp() {
        # populate your config
        R_URI_CLEAN="${RESPONSE_URI%/}" && R_URI_CLEAN="${R_URI_CLEAN#http*://}"
        local file="$(echo ${R_URI_CLEAN} | sed 's!/!__!g')"
        data="$(_get)"
        echo "${data}" | jq --arg uri "${RESPONSE_URI}" '{ ($uri): .}' > /sharedsecret/${file}

        echo wait the other idhubs to write, this is the only oportunity to sync with other idhubs in the docker compose
        sleep 2
        # get other configs
        for host in /sharedsecret/*; do
                # we are flexible on querying for RESPONSE_URI: the first one based on regex
                target_uri="$(cat "${host}" | jq -r 'keys[0]')"
                if [ "${target_uri}" != "${RESPONSE_URI}" ]; then
                        filtered_data="$(cat "${host}" | jq --arg uri "${RESPONSE_URI}" 'first(.[][] | select(.response_uri | test ($uri)))')"
                        client_id="$(echo "${filtered_data}" | jq -r '.client_id')"
                        client_secret="$(echo "${filtered_data}" | jq -r '.client_secret')"
                        response_uri="$(echo "${filtered_data}" | jq -r '.response_uri')"

                        _set my_client_id ${client_id} ${target_uri}
                        _set my_client_secret ${client_secret} ${target_uri}
                fi
        done
}

main() {
        idhub_dir='/opt/idhub'
        cd "${idhub_dir}"

        if [ ! -f "./manage.py" ]; then
                usage
        fi

        deployment_strategy

        inject_env_vars

        #./manage.py collectstatic

        ./manage.py runserver 0.0.0.0:${PORT}
}

main "${@}"