#!/bin/bash
# This file is in the public domain.

set -eu
#set -x

# Exit, with status code "skip" (no 'real' failure)
function exit_skip() {
    echo " SKIP: $1"
    exit 77
}

# Exit, with error message (hard failure)
function exit_fail() {
    echo " FAIL: $1"
    exit 1
}

# Cleanup to run whenever we exit
function cleanup()
{
    for n in $(jobs -p)
    do
        kill "$n" 2> /dev/null || true
    done
    rm -rf "$CONF" "$R1FILE" "$R2FILE" "$B1FILE" "$B2FILE"
    wait
}


# $1=ebics username, $2=ebics partner name, $3=person name, $4=sandbox bank account name, $5=iban
function prepare_sandbox_account() {
  echo -n "Registering $4 to the Sandbox..."
  export LIBEUFIN_SANDBOX_USERNAME="$4"
  export LIBEUFIN_SANDBOX_PASSWORD=unused
  libeufin-cli sandbox --sandbox-url="$SANDBOX_URL" \
    demobank register --name "$3" --iban "$5"
  echo " OK"
  echo -n "Associating a EBICS subscriber to $4..."
  export LIBEUFIN_SANDBOX_USERNAME=admin
  libeufin-cli sandbox --sandbox-url="$SANDBOX_URL" demobank new-ebicssubscriber \
    --host-id "$EBICS_HOST" \
    --user-id "$1" --partner-id "$2" \
    --bank-account "$4" # that's a username _and_ a bank account name
  echo " OK"

  unset LIBEUFIN_SANDBOX_USERNAME
  unset LIBEUFIN_SANDBOX_PASSWORD
}

function sync_providers() {
  infile="$1"
  outfile="$2"
  echo "Synchronizing providers"
  # Sync with providers (up to 3 providers aren't synced here)
  for x in 1 2 3; do
    echo "Synchronizing providers (round $x)"
    anastasis-reducer sync_providers < "$infile" > "$outfile" 2> /dev/null || true
    CODE=$(jq -r -e ".code // 0" < $outfile)
    # ANASTASIS_REDUCER_PROVIDERS_ALREADY_SYNCED
    # FIXME: Temporary workaround for C reducer. See #7227.
    if [ "$CODE" = "8420" ]
    then
      # restore previous non-error state
      cp "$infile" "$outfile"
      break
    fi
    # ANASTASIS_REDUCER_ACTION_INVALID
    if [ "$CODE" = "8400" ]
    then
      # restore previous non-error state
      cp "$infile" "$outfile"
      break
    fi
    if [ "$CODE" != "0" ]
    then
      exit_fail "Expected no error or 8420/8400, got $CODE"
    fi
    cp "$outfile" "$infile"
  done
  echo "Providers synced."
}


# Install cleanup handler (except for kill -9)
trap cleanup EXIT


# Transfer only from debit to credit/anastasis account.
# This function moves funds directly at the Sandbox.  No need
# to pass through the Nexus+Ebics layer to issue the payment
# $1 = amount ($CURRENCY:X.Y), $2 = subject.
function wire_transfer_to_anastasis() {
  echo -n "Initiating wire transfer ..."
  libeufin-sandbox make-transaction \
    --debit-account=sandbox-account-debit \
    --credit-account=sandbox-account-credit "$1" "$2" &> libeufin-transfer-initiate.out
  echo " OK"
  # FIXME-MS: the following command reports that it did not
  # sync any transactions, even though presumably we just
  # made one in the one above (which succeeded...)
  echo -n "Syncing nexus with sandbox ..."
  export LIBEUFIN_NEXUS_USERNAME="$CREDIT_USERNAME"
  export LIBEUFIN_NEXUS_PASSWORD="$CREDIT_PASSWORD"
  libeufin-cli accounts fetch-transactions nexus-bankaccount-credit &> libeufin-transfer-fetch.out
  echo " OK"
}

# $1 = facade base URL.  Merely a debug utility.
function see_anastasis_transactions_via_facade() {
  curl -s --user "$CREDIT_USERNAME:$CREDIT_PASSWORD" "${1}history/incoming?delta=5" | jq
}

# $1 = ebics user id, $2 = ebics partner, $3 = bank connection name
# $4 = bank account name local to Nexus, $5 = bank account name as known
# by Sandbox
function prepare_nexus_account() {
  echo -n "Making bank connection $3 ..."
  libeufin-cli connections new-ebics-connection \
    --ebics-url="${SANDBOX_URL}ebicsweb" \
    --host-id="$EBICS_HOST" \
    --partner-id="$2" \
    --ebics-user-id="$1" \
    $3 > /dev/null
  echo " OK"
  echo -n "Connecting $3 ..."
  libeufin-cli connections connect "$3" > /dev/null
  echo " OK"
  echo -n "Importing Sandbox bank account ($5) to Nexus ($4) ..."
  libeufin-cli connections download-bank-accounts "$3" > /dev/null
  libeufin-cli connections import-bank-account \
    --offered-account-id="$5" --nexus-bank-account-id="$4" "$3" > /dev/null
  echo " OK"
}


# Configuration file will be edited, so we create one
# from the template.
CONF=$(mktemp test_free_reducerXXXXXX.conf)
cp test_free_reducer.conf "$CONF"



B1FILE=$(mktemp test_reducer_stateB1XXXXXX)
B2FILE=$(mktemp test_reducer_stateB2XXXXXX)
R1FILE=$(mktemp test_reducer_stateR1XXXXXX)
R2FILE=$(mktemp test_reducer_stateR2XXXXXX)

export CONF
export B2FILE
export B1FILE
export R2FILE
export R1FILE

echo -n "Testing for libeufin-cli"
libeufin-cli --version > /dev/null || exit_skip "libeufin-cli required"
echo " FOUND"

echo -n "Testing for libeufin-nexus"
libeufin-nexus --version > /dev/null || exit_skip "libeufin-nexus required"
echo " FOUND"

echo -n "Testing for libeufin-sandbox"
libeufin-sandbox --version > /dev/null || exit_skip "libeufin-sandbox required"
echo " FOUND"

# Check we can actually run
echo -n "Testing for jq"
jq -h > /dev/null || exit_skip "jq required"
echo " FOUND"
echo -n "Testing for anastasis-reducer ..."
anastasis-reducer -h > /dev/null || exit_skip "anastasis-reducer required"
echo " FOUND"

echo -n "Initialize Anastasis database ..."
# Name of the Postgres database we will use for the script.
# Will be dropped, do NOT use anything that might be used
# elsewhere

TARGET_DB=$(anastasis-config -c "$CONF" -s stasis-postgres -o CONFIG | sed -e "s/^postgres:\/\/\///")

dropdb "$TARGET_DB" >/dev/null 2>/dev/null || true
createdb "$TARGET_DB" || exit_skip "Could not create database $TARGET_DB"
anastasis-dbinit -c "$CONF" 2> anastasis-dbinit.log

echo " OK"


export LIBEUFIN_NEXUS_DB_CONNECTION="postgres:///anastasischeck"
export LIBEUFIN_SANDBOX_DB_CONNECTION="postgres:///anastasischeck"
NEXUS_URL="http://localhost:5001/"
SANDBOX_URL="http://localhost:5000/"

echo -n "Starting Nexus ..."
libeufin-nexus serve &> nexus.log &
nexus_pid=$!
if ! curl -s --retry 5 --retry-connrefused "$NEXUS_URL" > /dev/null; then
  exit_skip "Could not launch Nexus"
fi
echo " OK"

echo -n "Configuring Sandbox..."
libeufin-sandbox config default &> sandbox-config.log
echo " OK"
echo -n "Starting Sandbox ..."
libeufin-sandbox serve --no-auth &> sandbox-serve.log &
sandbox_pid=$!
if ! curl -s --retry 5 --retry-connrefused "$SANDBOX_URL" > /dev/null; then
  exit_skip "Could not launch Sandbox"
fi
echo " OK"

CURRENCY="EUR"
# CURRENCY="TESTKUDOS"

EBICS_HOST="ebicstesthost"
export IBAN_CREDIT="DE89370400440532013000"
export IBAN_DEBIT="FR1420041010050500013M02606"

echo -n "Preparing Sandbox (creating the EBICS host) ..."
libeufin-cli \
  sandbox --sandbox-url="$SANDBOX_URL" \
    ebicshost create \
      --host-id="$EBICS_HOST"
echo " OK"

PERSON_CREDIT_NAME="Person Credit"
echo -n "Preparing accounts ..."
# note: Ebisc schema doesn't allow dashed names.
prepare_sandbox_account \
  ebicsuserCredit \
  ebicspartnerCredit \
  "${PERSON_CREDIT_NAME}" \
  sandbox-account-credit \
  "$IBAN_CREDIT"
prepare_sandbox_account \
  ebicsuserDebit \
  ebicspartnerDebit \
  "Person Debit" \
  sandbox-account-debit \
  "$IBAN_DEBIT"
echo "Sandbox preparation done"
echo -n "Preparing Nexus ..."
export LIBEUFIN_NEXUS_URL="$NEXUS_URL"
# Make debit user, will buy Anastasis services.
DEBIT_USERNAME=anastasis-debit-user
DEBIT_PASSWORD=anastasis-debit-password
libeufin-nexus superuser "$DEBIT_USERNAME" --password="$DEBIT_PASSWORD"
echo " OK"
export LIBEUFIN_NEXUS_USERNAME="$DEBIT_USERNAME"
export LIBEUFIN_NEXUS_PASSWORD="$DEBIT_PASSWORD"

# Make credit user, will be Anastasis client.
CREDIT_USERNAME=anastasis-credit-user
CREDIT_PASSWORD=anastasis-credit-password
echo -n "Create credit user (for anastasis) at Nexus ..."
libeufin-nexus superuser "$CREDIT_USERNAME" --password="$CREDIT_PASSWORD"
echo " OK"
export LIBEUFIN_NEXUS_USERNAME="$CREDIT_USERNAME"
export LIBEUFIN_NEXUS_PASSWORD="$CREDIT_PASSWORD"

prepare_nexus_account \
  ebicsuserCredit \
  ebicspartnerCredit \
  bankconnection-credit \
  nexus-bankaccount-credit \
  sandbox-account-credit

echo -n "Create facade ..."
libeufin-cli facades new-anastasis-facade \
  --currency="$CURRENCY" \
  --facade-name=facade-credit \
  bankconnection-credit nexus-bankaccount-credit
echo " OK"
FACADE_URL=$(libeufin-cli facades list | jq .facades[0].baseUrl | tr -d \")

## Reach facade with: $FACADE_URL + $CREDIT_USERNAME + $CREDIT_PASSWORD


echo -n "Configuring Anastasis IBAN account ..."
anastasis-config -c "$CONF" \
                 -s authorization-iban \
                 -o CREDIT_IBAN \
                 -V "${IBAN_CREDIT}"
anastasis-config -c "$CONF" \
                 -s authorization-iban \
                 -o BUSINESS_NAME \
                 -V "${PERSON_CREDIT_NAME}"
anastasis-config -c "$CONF" \
                 -s authorization-iban \
                 -o WIRE_GATEWAY_URL \
                 -V "${FACADE_URL}"
anastasis-config -c "$CONF" \
                 -s authorization-iban \
                 -o WIRE_GATEWAY_AUTH_METHOD \
                 -V "basic"
anastasis-config -c "$CONF" \
                 -s authorization-iban \
                 -o USERNAME \
                 -V "${LIBEUFIN_NEXUS_USERNAME}"
anastasis-config -c "$CONF" \
                 -s authorization-iban \
                 -o PASSWORD \
                 -V "${LIBEUFIN_NEXUS_PASSWORD}"
echo " OK"

echo -n "Launching Anastasis service ..."
PREFIX="" #valgrind
$PREFIX anastasis-httpd -c "$CONF" -L INFO 2> anastasis-httpd_1.log &
echo " OK"

echo -n "Waiting for Anastasis service ..."
# Wait for Anastasis service to be available
for n in $(seq 1 50)
do
    echo -n "."
    sleep 0.1
    OK=0
   # anastasis_01
    wget --tries=1 --timeout=1 http://localhost:8086/ -o /dev/null -O /dev/null >/dev/null || continue
    OK=1
    break
done
if [ 1 != $OK ]
then
    exit_skip "Failed to launch Anastasis service"
fi
echo "OK"

echo -n "Running backup logic ...,"
anastasis-reducer -b > "$B1FILE"
echo -n "."
anastasis-reducer -a \
  '{"continent": "Demoworld"}' \
  select_continent < "$B1FILE" > "$B2FILE"
echo -n "."
anastasis-reducer -a \
  '{"country_code": "xx" }' \
  select_country < "$B2FILE" > "$B1FILE" 2>> test_reducer.err
echo -n "."

anastasis-reducer -a \
  '{"identity_attributes": {
    "full_name": "Max Musterman",
    "sq_number": "4",
    "birthdate": "2000-01-01"}}' \
  enter_user_attributes < "$B1FILE" > "$B2FILE" 2>> test_reducer.err
echo -n ","
cat "$B2FILE" > "$B1FILE"
sync_providers "$B1FILE" "$B2FILE"
echo -n ","
BASEIBAN=$(echo -n $IBAN_DEBIT | gnunet-base32)
anastasis-reducer -a \
  "$(jq -n '{ authentication_method: {
    type: "iban",
    instructions: "Send me your money!",
    challenge: $CHALLENGE
    } }' \
   --arg CHALLENGE "$BASEIBAN"
  )" \
  add_authentication < "$B2FILE" > "$B1FILE" 2>> test_reducer.err
echo -n "."

# "91GPWWR" encodes "Hans"
anastasis-reducer -a \
  '{"authentication_method": {
    "type": "question",
    "instructions": "What is your name?",
    "challenge": "91GPWWR"
    } }' \
  add_authentication < "$B1FILE" > "$B2FILE" 2>> test_reducer.err
echo -n "."

mv "$B2FILE" "$B1FILE"

# Finished adding authentication methods
anastasis-reducer \
    next < "$B1FILE" > "$B2FILE" 2>> test_reducer.err

echo -n ","
# Finished policy review
anastasis-reducer \
  next < "$B2FILE" > "$B1FILE" 2>> test_reducer.err
echo -n "."
# Note: 'secret' must here be a Crockford base32-encoded value
anastasis-reducer -a \
  '{"secret": { "value" : "VERYHARDT0GVESSSECRET", "mime" : "text/plain" }}' \
  enter_secret < "$B1FILE" > "$B2FILE" 2>> test_reducer.err
mv "$B2FILE" "$B1FILE"
anastasis-reducer next < "$B1FILE" > "$B2FILE" 2>> test_reducer.err
echo " OK"

echo -n "Final backup checks ..."
STATE=$(jq -r -e .backup_state < "$B2FILE")
if [ "$STATE" != "BACKUP_FINISHED" ]
then
    exit_fail "Expected new state to be 'BACKUP_FINISHED', got '$STATE'"
fi
jq -r -e .core_secret < "$B2FILE" > /dev/null && exit_fail "'core_secret' was not cleared upon success"
echo " OK"

echo -n "Running recovery basic logic ..."
anastasis-reducer -r > "$R1FILE"
anastasis-reducer -a \
  '{"continent": "Demoworld"}' \
  select_continent < "$R1FILE" > "$R2FILE"
anastasis-reducer -a \
  '{"country_code": "xx",
    "currencies":["TESTKUDOS"]}' \
  select_country < "$R2FILE" > "$R1FILE" 2>> test_reducer.err
anastasis-reducer -a '{"identity_attributes": { "full_name": "Max Musterman", "sq_number": "4", "birthdate": "2000-01-01" }}' enter_user_attributes < "$R1FILE" > "$R2FILE" 2>> test_reducer.err


STATE=$(jq -r -e .recovery_state < "$R2FILE")
if [ "$STATE" != "SECRET_SELECTING" ]
then
    exit_fail "Expected new state to be 'SECRET_SELECTING', got '$STATE'"
fi
echo " OK"

echo -n "Adding provider (to ensure it is loaded)"
anastasis-reducer -a '{"provider_url" : "http://localhost:8086/" }' add_provider < "$R2FILE" > "$R1FILE"
echo " OK"

echo -n "Selecting secret to recover"
anastasis-reducer  -a '{"attribute_mask": 0, "providers" : [ { "version": 1, "url" : "http://localhost:8086/" } ] }' \
  select_version < "$R1FILE" > "$R2FILE" 2>> test_reducer.err

STATE=$(jq -r -e .recovery_state < "$R2FILE")
if [ "$STATE" != "CHALLENGE_SELECTING" ]
then
    exit_fail "Expected new state to be 'CHALLENGE_SELECTING', got '$STATE'"
fi
echo " OK"

cp "$R2FILE" "$R1FILE"
sync_providers "$R1FILE" "$R2FILE"

echo -n "Running challenge selection logic ..."

UUID0=$(jq -r -e .recovery_information.challenges[0].uuid < "$R2FILE")
UUID1=$(jq -r -e .recovery_information.challenges[1].uuid < "$R2FILE")
UUID0Q=$(jq -r -e .recovery_information.challenges[0].instructions < "$R2FILE")
UUID1Q=$(jq -r -e .recovery_information.challenges[1].instructions < "$R2FILE")

if [ "$UUID1Q" = 'What is your name?' ]
then
    NAME_UUID=$UUID1
    IBAN_UUID=$UUID0
else
    NAME_UUID=$UUID0
    IBAN_UUID=$UUID1
fi

echo "OK"
echo -n "Solving first challenge ..."
anastasis-reducer -a \
  "$(jq -n '
    {
        uuid: $UUID
    }' \
    --arg UUID "$NAME_UUID"
  )" \
  select_challenge < "$R2FILE" > "$R1FILE" 2>> test_reducer.err

anastasis-reducer -a '{"answer": "Hans"}' \
  solve_challenge < "$R1FILE" > "$R2FILE"

echo "OK"
echo -n "Solving IBAN challenge ..."

anastasis-reducer -a \
  "$(jq -n '
    {
        uuid: $UUID
    }' \
    --arg UUID "$IBAN_UUID"
  )" \
  select_challenge < "$R2FILE" > "$R1FILE" 2>> test_reducer.err
echo "OK"


METHOD=$(jq -r -e .challenge_feedback.\"$IBAN_UUID\".state < "$R1FILE")
if [ "$METHOD" != "iban-instructions" ]
then
    exit_fail "Expected method to be 'iban-instructions', got ${METHOD}"
fi

ACC=$(jq -r -e .challenge_feedback.\"$IBAN_UUID\".target_iban < "$R1FILE")
if [ "$ACC" != "${IBAN_CREDIT}" ]
then
    exit_fail "Expected account to be ${IBAN_CREDIT}, got ${ACC}"
fi

anastasis-reducer \
  back < "$R1FILE" > "$R2FILE" 2>> test_reducer.err


AMOUNT=$(jq -r -e .challenge_feedback.\"$IBAN_UUID\".challenge_amount < "$R1FILE")
SUBJECT=$(jq -r -e .challenge_feedback.\"$IBAN_UUID\".wire_transfer_subject < "$R1FILE")

echo -n "Performing authorization wire transfer ${SUBJECT} ..."
wire_transfer_to_anastasis "${AMOUNT}" "${SUBJECT}"

echo " OK"

echo -n "Triggering inbound check ..."
anastasis-helper-authorization-iban -c "$CONF" -t -L INFO
echo " OK"

# Now we should get the secret...
echo -n "Polling for recovery ..."
anastasis-reducer poll -L INFO < "$R2FILE" > "$R1FILE"
echo " OK"

echo -n "Checking recovered secret ..."
# finally: check here that we recovered the secret...

STATE=$(jq -r -e .recovery_state < "$R1FILE")
if [ "$STATE" != "RECOVERY_FINISHED" ]
then
    jq -e . "$R1FILE"
    exit_fail "Expected new state to be 'RECOVERY_FINISHED', got '$STATE'"
fi

SECRET=$(jq -r -e .core_secret.value < "$R1FILE")
if [ "$SECRET" != "VERYHARDT0GVESSSECRET" ]
then
    jq -e . "$R1FILE"
    exit_fail "Expected recovered secret to be 'VERYHARDT0GVESSSECRET', got '$SECRET'"
fi

MIME=$(jq -r -e .core_secret.mime < "$R1FILE")
if [ "$MIME" != "text/plain" ]
then
    jq -e . "$R1FILE"
    exit_fail "Expected recovered mime to be 'text/plain', got '$MIME'"
fi

echo " OK"

exit 0