#!/usr/bin/env python

# -----------------------------------------------------------------------------
# Copyright (c) 2011-2017, The BIOM Format Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
# -----------------------------------------------------------------------------

from unittest import TestCase, main
from copy import deepcopy

from biom import example_table, Table
from biom.exception import TableException
from biom.err import (_test_empty, _test_obssize, _test_sampsize, _test_obsdup,
                      _test_sampdup, _test_obsmdsize, _test_sampmdsize,
                      errstate, geterr, seterr, geterrcall, seterrcall,
                      errcheck, errstate, __errprof)


runtime_ep = __errprof
runtime_ep_profile = deepcopy(runtime_ep._profile)
runtime_ep_state = runtime_ep._state.copy()
runtime_ep_test = runtime_ep._test.copy()


class ErrModeTests(TestCase):
    def setUp(self):
        self.ex_table = example_table.copy()

    def test_test_empty(self):
        self.assertTrue(_test_empty(Table([], [], [])))
        self.assertFalse(_test_empty(self.ex_table))

    def test_test_obssize(self):
        self.assertFalse(_test_obssize(self.ex_table))
        self.ex_table._observation_ids = self.ex_table._observation_ids[:-1]
        self.assertTrue(_test_obssize(self.ex_table))

    def test_test_sampsize(self):
        self.assertFalse(_test_sampsize(self.ex_table))
        self.ex_table._sample_ids = self.ex_table._sample_ids[:-1]
        self.assertTrue(_test_sampsize(self.ex_table))

    def test_test_obsdup(self):
        self.assertFalse(_test_obsdup(self.ex_table))
        self.ex_table._observation_ids[0] = self.ex_table._observation_ids[1]
        self.assertTrue(_test_obsdup(self.ex_table))

    def test_test_sampdup(self):
        self.assertFalse(_test_sampdup(self.ex_table))
        self.ex_table._sample_ids[0] = self.ex_table._sample_ids[1]
        self.assertTrue(_test_sampdup(self.ex_table))

    def test_test_obsmdsize(self):
        self.assertFalse(_test_obsdup(self.ex_table))
        self.ex_table._observation_metadata = \
            self.ex_table._observation_metadata[:-1]
        self.assertTrue(_test_obsmdsize(self.ex_table))

    def test_test_sampmdsize(self):
        self.assertFalse(_test_sampdup(self.ex_table))
        self.ex_table._sample_metadata = \
            self.ex_table._sample_metadata[:-1]
        self.assertTrue(_test_sampmdsize(self.ex_table))


class ErrorProfileTests(TestCase):
    def setUp(self):
        self.ex_table = example_table.copy()
        self.ep = runtime_ep
        self.ep.state = {'all': 'raise'}

    def tearDown(self):
        self.ep._profile = deepcopy(runtime_ep_profile.copy())
        self.ep._state = runtime_ep_state.copy()
        self.ep._test = runtime_ep_test.copy()

    def test_test(self):
        self.ep.test(self.ex_table)
        self.ep.test(self.ex_table, 'empty')
        self.ep.test(self.ex_table, 'empty', 'obssize')

        self.ex_table._observation_ids = self.ex_table._observation_ids[:-1]
        self.ep.test(self.ex_table, 'empty')
        self.assertTrue(isinstance(self.ep.test(self.ex_table, 'obssize'),
                                   TableException))

    def test_state(self):
        self.ep.state = {'all': 'ignore'}
        self.assertEqual(set(self.ep._state.values()), set(['ignore']))
        self.ep.state = {'empty': 'call'}
        self.assertEqual(set(self.ep._state.values()), set(['ignore', 'call']))
        self.assertEqual(self.ep.state['empty'], 'call')

        with self.assertRaises(KeyError):
            self.ep.state = {'empty': 'missing'}

        with self.assertRaises(KeyError):
            self.ep.state = {'emptyasdasd': 'ignore'}

    def test_contains(self):
        self.assertTrue('empty' in self.ep)
        self.assertFalse('emptyfoo' in self.ep)

    def test_handle_error(self):
        def callback(foo):
            return 10

        self.ep.setcall('empty', callback)

        self.assertTrue(isinstance(self.ep._handle_error('empty', None),
                                   TableException))
        self.ep.state = {'empty': 'call'}
        self.assertEqual(self.ep._handle_error('empty', None), 10)

    def test_setcall(self):
        def callback(foo):
            return 10

        self.assertEqual(self.ep._profile['empty']['call'](None), None)
        self.ep.setcall('empty', callback)
        self.assertEqual(self.ep._profile['empty']['call'](None), 10)

        with self.assertRaises(KeyError):
            self.ep.setcall('emptyfoo', callback)

    def test_getcall(self):
        def callback(foo):
            return 10
        self.ep.setcall('empty', callback)
        self.assertEqual(self.ep.getcall('empty'), callback)

        with self.assertRaises(KeyError):
            self.ep.getcall('emptyfoo')

    def test_register_unregister(self):
        cb = lambda x: 123
        test = lambda x: x == 5

        self.ep.register('foo', 'bar', 'ignore', test, callback=cb)
        self.assertTrue('foo' in self.ep)
        self.ep.state = {'foo': 'call'}
        self.assertEqual(self.ep._handle_error('foo', None), 123)

        foo_prof = self.ep._profile['foo'].copy()
        prof, func, state = self.ep.unregister('foo')

        self.assertEqual(func, test)
        self.assertEqual(state, 'call')
        self.assertEqual(prof, foo_prof)

        with self.assertRaises(KeyError):
            self.ep.register('empty', 1, 2, lambda: None)

        with self.assertRaises(KeyError):
            self.ep.register('foo', 'missing', 2, lambda: None)

        with self.assertRaises(KeyError):
            self.ep.unregister('non_existant')


class SupportTests(TestCase):
    def setUp(self):
        self.ex_table = example_table.copy()

    def test_geterr(self):
        state = geterr()
        self.assertEqual(state, runtime_ep._state)
        old = seterr(all='call')
        self.assertNotEqual(geterr(), state)
        seterr(**old)

    def test_seterr(self):
        existing = seterr(empty='warn')
        self.assertEqual(runtime_ep._state['empty'], 'warn')
        self.assertNotEqual(runtime_ep._state['empty'], existing)
        seterr(empty=existing['empty'])
        self.assertNotEqual(runtime_ep._state['empty'], 'warn')
        self.assertEqual(runtime_ep._state, existing)

    def test_geterrcall(self):
        exp = runtime_ep._profile['sampsize']['call']
        obs = geterrcall('sampsize')
        self.assertEqual(obs, exp)

        with self.assertRaises(KeyError):
            geterrcall('asdasd')

    def test_seterrcall(self):
        def foo(x):
            return 10

        seterrcall('sampmdsize', foo)
        obs = geterrcall('sampmdsize')
        self.assertEqual(obs, foo)

    def test_errcheck(self):
        self.assertEqual(errcheck(self.ex_table), None)
        self.ex_table._sample_ids = self.ex_table._sample_ids[:-1]
        with self.assertRaises(TableException):
            errcheck(self.ex_table)

    def test_errstate(self):
        def foo(item):
            return "the callback called"

        table = Table([], [], [])
        seterrcall('empty', foo)
        self.assertNotEqual(geterr()['empty'], 'call')
        with errstate(empty='call'):
            result = errcheck(table)
        self.assertEqual(result, "the callback called")
        self.assertNotEqual(geterr()['empty'], 'call')

if __name__ == '__main__':
    main()
