#!/bin/bash
#
#  This file is part of TALER
#  Copyright (C) 2014-2024 Taler Systems SA
#
#  TALER is free software; you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation; either version 3, or (at your option) any later version.
#
#  TALER 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 General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along with
#  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/license>
#

# Hard error reporting on.
set -eu

# Exit, with error message (hard failure)
function exit_fail() {
    echo " FAIL: " "$@" >&2
    EXIT_STATUS=1
    exit "$EXIT_STATUS"
}

CONF="$HOME/.config/taler-exchange.conf"
VERBOSE=0

while getopts 'ac:hrvV' OPTION;
do
    case "$OPTION" in
        a)
            # This AML program expects as inputs a full_name
            # and a birthdate.
            echo "full_name"
            echo "birthdate"
            exit 0
            ;;
        c)
            # shellcheck disable=SC2034
            CONF="$OPTARG"
            ;;
        h)
            echo "This is a KYC measure program that checks the output of an OAuth2 authentication, and if it passed, increases all limits to EUR:1000. (and does not impose any other limits)"
            echo 'Supported options:'
            echo '  -a           -- show required attributes'
            # shellcheck disable=SC2016
            echo '  -c $CONF     -- set configuration'
            echo '  -h           -- print this help'
            echo '  -r           -- show required context'
            echo '  -v           -- show version'
            echo '  -V           -- be verbose'
            ;;
        r)
            # No context is required.
            exit 0
            ;;
        v)
            echo "$0 v0.0.0"
            exit 0
            ;;
        V)
            VERBOSE=1
            ;;
        ?)
        exit_fail "Unrecognized command line option"
        ;;
    esac
done

if [ 1 = "$VERBOSE" ]
then
    echo "Running $0" 1>&2
fi

# First, check everything we expect is in stdin.
A=$(jq -r .attributes)
J=$(echo "$A" | jq -r 'def get($k):
             if has($k)
               then .[$k]
               else error("attribute missing")
           end;
           {"full_name":get("full_name"),
            "birthdate":get("birthdate")}')

# Here we could use those values...
echo "$J" >> /dev/null

# See https://docs.taler.net/taler-exchange-manual.html#tsref-type-AmlProgramInput
# for the full JSON with possible inputs.

# New rules apply for 30 days.
EXPIRATION=$((3600 * 30 + $(date +%s)))

# Finally, output the new rules.
# See https://docs.taler.net/taler-exchange-manual.html#tsref-type-AmlOutcome
# for the required output format.

jq -n \
    --argjson expiration "$EXPIRATION" \
    '{ "to_investigate": false,
       "new_rules" : {
         "new_measures" : "info-oauth-test-passed",
         "custom_measures" : {},
         "expiration_time" : { "t_s": $expiration },
         "rules" : [
         {
           "operation_type": "WITHDRAW",
           "threshold" : "EUR:1000",
           "timeframe" : { "d_us" : 3600000000 },
           "measures" : [ "verboten" ],
           "display_priority" : 1,
           "exposed" : true,
           "is_and_combinator" : true
         },
         {
           "operation_type": "DEPOSIT",
           "threshold" : "EUR:1000",
           "timeframe" : { "d_us" : 3600000000 },
           "measures" : [ "verboten" ],
           "display_priority" : 1,
           "exposed" : true,
           "is_and_combinator" : true
         },
         {
           "operation_type": "AGGREGATE",
           "threshold" : "EUR:1000",
           "timeframe" : { "d_us" : 3600000000 },
           "measures" : [ "verboten" ],
           "display_priority" : 1,
           "exposed" : true,
           "is_and_combinator" : true
         },
         {
           "operation_type": "MERGE",
           "threshold" : "EUR:1000",
           "timeframe" : { "d_us" : 3600000000 },
           "measures" : [ "verboten" ],
           "display_priority" : 1,
           "exposed" : true,
           "is_and_combinator" : true
         },
         {
           "operation_type": "BALANCE",
           "threshold" : "EUR:1000",
           "timeframe" : { "d_us" : 3600000000 },
           "measures" : [ "verboten" ],
           "display_priority" : 1,
           "exposed" : true,
           "is_and_combinator" : true
         },
         {
           "operation_type": "CLOSE",
           "threshold" : "EUR:1000",
           "timeframe" : { "d_us" : 3600000000 },
           "measures" : [ "verboten" ],
           "display_priority" : 1,
           "exposed" : true,
           "is_and_combinator" : true
         }
         ]
       }
     }' < /dev/null

exit 0