#!/bin/sh

# Copyright (C) 2017-2021 Internet Systems Consortium, Inc. ("ISC")
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# shellcheck disable=SC1091
# SC1091: Not following: ... was not specified as input (see shellcheck -x).

# Exit with error if commands exit with non-zero and if undefined variables are
# used.
set -eu

# Path to the temporary configuration file.
# shellcheck disable=SC2034
# SC2034: ... appears unused. Verify use (or export if used externally).
# reason: used in dhcp_test_lib.sh.in
CFG_FILE="@abs_top_builddir@/src/bin/shell/tests/test_config.json"

# Path to the Control Agent log file.
LOG_FILE="@abs_top_builddir@/src/bin/shell/tests/test.log"

# Control Agent configuration to be stored in the configuration file.
# todo: use actual configuration once we support it.
CONFIG="{
    \"Control-agent\":
    {
        \"http-host\": \"127.0.0.1\",
        \"http-port\": 8081,
        \"loggers\": [
        {
            \"name\": \"kea-ctrl-agent\",
            \"output_options\": [
                {
                    \"output\": \"$LOG_FILE\"
                }
            ],
            \"severity\": \"DEBUG\"
        }
        ]
    }
}"

# In these tests we need to use two binaries: Control Agent and Kea shell.
# Using bin and bin_path would be confusing, so we omit defining bin
# and bin_path on purpose.
ca_bin="kea-ctrl-agent"
ca_bin_path="@abs_top_builddir@/src/bin/agent"

shell_bin="kea-shell"
shell_bin_path="@abs_top_builddir@/src/bin/shell"

tmpfile_path="@abs_top_builddir@/src/bin/shell/tests"

# Import common test library.
. "@abs_top_builddir@/src/lib/testutils/dhcp_test_lib.sh"

# This test verifies that Control Agent is shut down gracefully when it
# receives a SIGINT or SIGTERM signal.
shell_command_test() {
    test_name=${1}  # Test name
    cmd=${2}        # Command to be sent
    exp_rsp=${3}    # Expected response
    params=${4}     # Any extra parameters

    # Setup phase: start CA.

    # Log the start of the test and print test name.
    test_start "${test_name}"

    # Create new configuration file.
    create_config "${CONFIG}"

    # Instruct Control Agent to log to the specific file.
    set_logger
    # Start Control Agent.
    start_kea ${ca_bin_path}/${ca_bin}
    # Wait up to 20s for Control Agent to start.
    wait_for_kea 20
    if [ "${_WAIT_FOR_KEA}" -eq 0 ]; then
        printf "ERROR: timeout waiting for Control Agent to start.\n"
        clean_exit 1
    fi

    # Check if it is still running. It could have terminated (e.g. as a result
    # of configuration failure).
    get_pid "${ca_bin}"
    if [ "${_GET_PIDS_NUM}" -ne 1 ]; then
        printf "ERROR: expected one Control Agent process to be started.\
 Found %d processes started.\n" "${_GET_PIDS_NUM}"
        clean_exit 1
    fi

    # Check in the log file, how many times server has been configured.
    # It should be just once on startup.
    get_reconfigs
    if [ "${_GET_RECONFIGS}" -ne 1 ]; then
        printf "ERROR: server been configured %s time(s),\
 but exactly 1 was expected.\n" "${_GET_RECONFIGS}"
        clean_exit 1
    else
        printf "Server successfully configured.\n"
    fi

    # Main test phase: send command, check response.
    tmp="echo \"${params}\" | ${shell_bin_path}/${shell_bin} --host \
 127.0.0.1 --port 8081 ${cmd} > ${tmpfile_path}/shell-stdout.txt"
    echo "Executing kea-shell ($tmp)"

    echo "${params}" | ${shell_bin_path}/${shell_bin} --host 127.0.0.1 \
 --port 8081 "${cmd}" > ${tmpfile_path}/shell-stdout.txt
    shell_exit_code=$?

    # Check the exit code
    if [ "${shell_exit_code}" -ne 0 ]; then
        echo "ERROR:" \
        "kea-shell returned ${shell_exit_code} exit code, expected 0."
    else
        echo "kea-shell returned ${shell_exit_code} exit code as expected."
    fi

    # Now check the response
    rm -f ${tmpfile_path}/shell-expected.txt
    printf '%s\n' "${exp_rsp}" > ${tmpfile_path}/shell-expected.txt
    diff ${tmpfile_path}/shell-stdout.txt ${tmpfile_path}/shell-expected.txt
    diff_code=$?
    if [ "${diff_code}" -ne 0 ]; then
        echo "ERROR:" \
        "content returned is different than expected." \
        "See ${tmpfile_path}/shell-*.txt"
        echo "EXPECTED:"
        cat ${tmpfile_path}/shell-expected.txt
        echo "ACTUAL RESULT:"
        cat ${tmpfile_path}/shell-stdout.txt
        clean_exit 1
    else
        echo "Content returned by kea-shell meets expectation."
        rm ${tmpfile_path}/shell-*.txt
    fi
    # Main test phase ends.

    # Cleanup phase: shutdown CA
    # Send SIGTERM signal to Control Agent
    send_signal 15 ${ca_bin}

    # Now wait for process to log that it is exiting.
    wait_for_message 10 "DCTL_SHUTDOWN" 1
    if [ "${_WAIT_FOR_MESSAGE}" -eq 0 ]; then
        printf "ERROR: Control Agent did not log shutdown.\n"
        clean_exit 1
    fi

    # Make sure the server is down.
    wait_for_server_down 5 ${ca_bin}
    assert_eq 1 "${_WAIT_FOR_SERVER_DOWN}" \
        "Expected wait_for_server_down return %d, returned %d"

    test_finish 0
}

# This test verifies that the binary is reporting its version properly.
version_test() {
    test_name=${1}  # Test name

    # Log the start of the test and print test name.
    test_start "${test_name}"

    REPORTED_VERSION=$(${shell_bin_path}/${shell_bin} -v)

    if test "${REPORTED_VERSION}" = "${EXPECTED_VERSION}"; then
        test_finish 0
    else
        echo "ERROR:" \
        "Expected version ${EXPECTED_VERSION}, got ${REPORTED_VERSION}"
        test_finish 1
    fi
}

version_test "shell.version"
shell_command_test "shell.list-commands" "list-commands" \
    "[ { \"arguments\": [ \"build-report\", \"config-get\", \"config-reload\", \"config-set\", \"config-test\", \"config-write\", \"list-commands\", \"shutdown\", \"status-get\", \"version-get\" ], \"result\": 0 } ]" ""
shell_command_test "shell.bogus" "give-me-a-beer" \
"[ { \"result\": 2, \"text\": \"'give-me-a-beer' command not supported. You did not include \\\"service\\\" parameter in the command, which indicates that Kea Control Agent should process this command rather than forward it to one or more Kea servers. If you aimed to send this command to one of the Kea servers you should include the \\\"service\\\" parameter in your request, e.g. \\\"service\\\": [ \\\"dhcp4\\\" ] to forward the command to the DHCPv4 server, or \\\"service\\\": [ \\\"dhcp4\\\", \\\"dhcp6\\\", \\\"d2\\\" ] to forward it to DHCPv4, DHCPv6 and D2 servers etc.\" } ]" ""
shell_command_test "shell.empty-config-test" "config-test" \
    "[ { \"result\": 1, \"text\": \"Missing mandatory 'arguments' parameter.\" } ]" ""
shell_command_test "shell.no-app-config-test" "config-test" \
    "[ { \"result\": 1, \"text\": \"Missing mandatory 'Control-agent' parameter.\" } ]" \
    "\"FooBar\": { }"
shell_command_test "shell.no-map-config-test" "config-test" \
    "[ { \"result\": 1, \"text\": \"'Control-agent' parameter expected to be a map.\" } ]" \
    "\"Control-agent\": [ ]"
shell_command_test "shell.bad-value-config-test" "config-test" \
    "[ { \"result\": 1, \"text\": \"out of range value (80000) specified for parameter 'http-port' (<string>:1:76)\" } ]" \
    "\"Control-agent\": { \"http-port\": 80000 }"