#! /usr/bin/env python3

import os
import subprocess
import sys
import argparse
import re
from glob import glob
from collections import defaultdict

# Tests require at least CPython 3.3. If your default python3 executable
# is of lower version, you can point MICROPY_CPYTHON3 environment var
# to the correct executable.
if os.name == 'nt':
    CPYTHON3 = os.getenv('MICROPY_CPYTHON3', 'python3.exe')
    MICROPYTHON = os.getenv('MICROPY_MICROPYTHON', '../windows/micropython.exe')
else:
    CPYTHON3 = os.getenv('MICROPY_CPYTHON3', 'python3')
    MICROPYTHON = os.getenv('MICROPY_MICROPYTHON', '../unix/micropython')

def run_tests(pyb, test_dict):
    test_count = 0
    testcase_count = 0

    for base_test, tests in test_dict.items():
        print(base_test + ":")
        for test_file in tests:

            # run Micro Python
            if pyb is None:
                # run on PC
                try:
                    output_mupy = subprocess.check_output([MICROPYTHON, '-X', 'emit=bytecode', test_file[0]])
                except subprocess.CalledProcessError:
                    output_mupy = b'CRASH'
            else:
                # run on pyboard
                pyb.enter_raw_repl()
                try:
                    output_mupy = pyb.execfile(test_file).replace(b'\r\n', b'\n')
                except pyboard.PyboardError:
                    output_mupy = b'CRASH'

            output_mupy = float(output_mupy.strip())
            test_file[1] = output_mupy
            testcase_count += 1

        test_count += 1
        baseline = None
        for t in tests:
            if baseline is None:
                baseline = t[1]
            print("    %.3fs (%+06.2f%%) %s" % (t[1], (t[1] * 100 / baseline) - 100, t[0]))

    print("{} tests performed ({} individual testcases)".format(test_count, testcase_count))

    # all tests succeeded
    return True

def main():
    cmd_parser = argparse.ArgumentParser(description='Run tests for MicroPython.')
    cmd_parser.add_argument('--pyboard', action='store_true', help='run the tests on the pyboard')
    cmd_parser.add_argument('files', nargs='*', help='input test files')
    args = cmd_parser.parse_args()

    # Note pyboard support is copied over from run-tests, not testes, and likely needs revamping
    if args.pyboard:
        import pyboard
        pyb = pyboard.Pyboard('/dev/ttyACM0')
        pyb.enter_raw_repl()
    else:
        pyb = None

    if len(args.files) == 0:
        if pyb is None:
            # run PC tests
            test_dirs = ('bench',)
        else:
            # run pyboard tests
            test_dirs = ('basics', 'float', 'pyb')
        tests = sorted(test_file for test_files in (glob('{}/*.py'.format(dir)) for dir in test_dirs) for test_file in test_files)
    else:
        # tests explicitly given
        tests = sorted(args.files)

    test_dict = defaultdict(lambda: [])
    for t in tests:
        m = re.match(r"(.+?)-(.+)\.py", t)
        if not m:
            continue
        test_dict[m.group(1)].append([t, None])

    if not run_tests(pyb, test_dict):
        sys.exit(1)

if __name__ == "__main__":
    main()
