#!/bin/bash

set -eu

function usage {
    echo "Usage: $0 [OPTION]..."
    echo "Run Manila's test suite(s)"
    echo ""
    echo "  -V, --virtual-env           Always use virtualenv.  Install automatically if not present"
    echo "  -N, --no-virtual-env        Don't use virtualenv.  Run tests in local environment"
    echo "  -s, --no-site-packages      Isolate the virtualenv from the global Python environment"
    echo "  -r, --recreate-db           Recreate the test database (deprecated, as this is now the default)."
    echo "  -n, --no-recreate-db        Don't recreate the test database."
    echo "  -f, --force                 Force a clean re-build of the virtual environment. Useful when dependencies have been added."
    echo "  -u, --update                Update the virtual environment with any     newer package versions"
    echo "  -p, --pep8                  Just run PEP8 and HACKING compliance check"
    echo "  -P, --no-pep8               Don't run static code checks"
    echo "  -c, --coverage              Generate coverage report"
    echo "  -d, --debug                 Run tests with testtools instead of testr. This allows you to use the debugger."
    echo "  -h, --help                  Print this usage message"
    echo "  --hide-elapsed              Don't print the elapsed time for each test along with slow test list"
    echo "  --virtual-env-path <path>   Location of the virtualenv directory."
    echo "                                  Default: \$(pwd)"
    echo "  --virtual-env-name <name>   Name of the virtualenv directory."
    echo "                                  Default: .venv"
    echo "  --tools-path <dir>          Location of the tools directory."
    echo "                                  Default: \$(pwd)"
    echo "  --concurrency <concurrency> How many processes to use when running the tests."
    echo "                                  A value of 0 autodetects concurrency from your CPU count."
    echo "                                  Default: 1"
    echo ""
    echo "Note: with no options specified, the script will try to run the tests in a virtual environment,"
    echo "      If no virtualenv is found, the script will ask if you would like to create one.  If you "
    echo "      prefer to run tests NOT in a virtual environment, simply pass the -N option."
    exit
}

function process_options {
    i=1
    while [ $i -le $# ]; do
        case "${!i}" in
            -h|--help) usage;;
            -V|--virtual-env) always_venv=1; never_venv=0;;
            -N|--no-virtual-env) always_venv=0; never_venv=1;;
            -s|--no-site-packages) no_site_packages=1;;
            -r|--recreate-db) recreate_db=1;;
            -n|--no-recreate-db) recreate_db=0;;
            -f|--force) force=1;;
            -u|--update) update=1;;
            -p|--pep8) just_pep8=1;;
            -P|--no-pep8) no_pep8=1;;
            -c|--coverage) coverage=1;;
            -d|--debug) debug=1;;
            --virtual-env-path)
                (( i++ ))
                venv_path=${!i}
                ;;
            --virtual-env-name)
                (( i++ ))
                venv_dir=${!i}
                ;;
            --tools-path)
                (( i++ ))
                tools_path=${!i}
                ;;
            --concurrency)
                (( i++ ))
                concurrency=${!i}
                ;;
            -*) testropts="$testropts ${!i}";;
            *) testrargs="$testrargs ${!i}"
        esac
        (( i++ ))
    done
}

tool_path=${tools_path:-$(pwd)}
venv_path=${venv_path:-$(pwd)}
venv_dir=${venv_name:-.venv}
with_venv=tools/with_venv.sh
always_venv=0
never_venv=0
force=0
no_site_packages=0
installvenvopts=
testrargs=
testropts=
wrapper=""
just_pep8=0
no_pep8=0
coverage=0
debug=0
recreate_db=1
update=0
concurrency=1

process_options $@
# Make our paths available to other scripts we call
export venv_path
export venv_dir
export venv_name
export tools_dir
export venv=${venv_path}/${venv_dir}

if [ $no_site_packages -eq 1 ]; then
    installvenvopts="--no-site-packages"
fi

function init_testr {
    if [ ! -d .testrepository ]; then
        ${wrapper} testr init
    fi
}

function run_tests {
    # Cleanup *pyc
    ${wrapper} find . -type f -name "*.pyc" -delete

    if [ $debug -eq 1 ]; then
        if [ "$testropts" = "" ] && [ "$testrargs" = "" ]; then
            # Default to running all tests if specific test is not
            # provided.
            testrargs="discover ./manila/tests"
        fi
        ${wrapper} python -m testtools.run $testropts $testrargs

        # Short circuit because all of the testr and coverage stuff
        # below does not make sense when running testtools.run for
        # debugging purposes.
        return $?
    fi

    if [ $coverage -eq 1 ]; then
        TESTRTESTS="$TESTRTESTS --coverage"
    else
        TESTRTESTS="$TESTRTESTS"
    fi

    # Just run the test suites in current environment
    set +e
    testrargs=`echo "$testrargs" | sed -e's/^\s*\(.*\)\s*$/\1/'`
    TESTRTESTS="$TESTRTESTS --testr-args='--subunit --concurrency $concurrency $testropts $testrargs'"
    if [ setup.cfg -nt manila.egg-info/entry_points.txt ]; then
        ${wrapper} python setup.py egg_info
    fi
    echo "Running \`${wrapper} $TESTRTESTS\`"
    if ${wrapper} which subunit-2to1 2>&1 > /dev/null; then
        # subunit-2to1 is present, testr subunit stream should be in version 2
        # format. Convert to version one before colorizing.
        bash -c "${wrapper} $TESTRTESTS | ${wrapper} subunit-2to1 | ${wrapper} tools/colorizer.py"
    else
        bash -c "${wrapper} $TESTRTESTS | ${wrapper} tools/colorizer.py"
    fi
    RESULT=$?
    set -e

    copy_subunit_log

    if [ $coverage -eq 1 ]; then
        echo "Generating coverage report in covhtml/"
        # Don't compute coverage for common code, which is tested elsewhere
        ${wrapper} coverage combine
        ${wrapper} coverage html --include='manila/*' -d covhtml -i
    fi

    return $RESULT
}

function copy_subunit_log {
    LOGNAME=`cat .testrepository/next-stream`
    LOGNAME=$(($LOGNAME - 1))
    LOGNAME=".testrepository/${LOGNAME}"
    cp $LOGNAME subunit.log
}

function run_pep8 {
    echo "Running flake8..."
    bash -c "${wrapper} flake8"
}

TESTRTESTS="python setup.py testr"

if [ $never_venv -eq 0 ]; then
    # Remove the virtual environment if --force used
    if [ $force -eq 1 ]; then
        echo "Cleaning virtualenv..."
        rm -rf ${venv}
    fi
    if [ $update -eq 1 ]; then
        echo "Updating virtualenv..."
        python tools/install_venv.py $installvenvopts
    fi
    if [ -e ${venv} ]; then
        wrapper="${with_venv}"
    else
        if [ $always_venv -eq 1 ]; then
            # Automatically install the virtualenv
            python tools/install_venv.py $installvenvopts
            wrapper="${with_venv}"
        else
            echo -e "No virtual environment found...create one? (Y/n) \c"
            read use_ve
            if [ "x$use_ve" = "xY" -o "x$use_ve" = "x" -o "x$use_ve" = "xy" ]; then
                # Install the virtualenv and run the test suite in it
                python tools/install_venv.py $installvenvopts
                wrapper=${with_venv}
            fi
        fi
    fi
fi

# Delete old coverage data from previous runs
if [ $coverage -eq 1 ]; then
    ${wrapper} coverage erase
fi

if [ $just_pep8 -eq 1 ]; then
    run_pep8
    exit
fi

if [ $recreate_db -eq 1 ]; then
    rm -f tests.sqlite
fi

init_testr
run_tests

# NOTE(sirp): we only want to run pep8 when we're running the full-test suite,
# not when we're running tests individually. To handle this, we need to
# distinguish between options (testropts), which begin with a '-', and
# arguments (testrargs).
if [ -z "$testrargs" ]; then
    if [ $no_pep8 -eq 0 ]; then
        run_pep8
    fi
fi