# Copyright (C) 2014 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from common.immutables               import ImmutableDict
from common.testing                  import ToUnicode
from file_format.c1visualizer.parser import ParseC1visualizerStream
from file_format.c1visualizer.struct import C1visualizerFile, C1visualizerPass
from file_format.checker.parser      import ParseCheckerStream, ParseCheckerAssertion
from file_format.checker.struct      import CheckerFile, TestCase, TestAssertion
from match.file                      import MatchTestCase, MatchFailedException
from match.line                      import MatchLines

import io
import unittest

CheckerException = SystemExit

class MatchLines_Test(unittest.TestCase):

  def createTestAssertion(self, checkerString):
    checkerFile = CheckerFile("<checker-file>")
    testCase = TestCase(checkerFile, "TestMethod TestPass", 0)
    return ParseCheckerAssertion(testCase, checkerString, TestAssertion.Variant.InOrder, 0)

  def tryMatch(self, checkerString, c1String, varState={}):
    return MatchLines(self.createTestAssertion(checkerString),
                      ToUnicode(c1String),
                      ImmutableDict(varState))

  def assertMatches(self, checkerString, c1String, varState={}):
    self.assertIsNotNone(self.tryMatch(checkerString, c1String, varState))

  def assertDoesNotMatch(self, checkerString, c1String, varState={}):
    self.assertIsNone(self.tryMatch(checkerString, c1String, varState))

  def test_TextAndWhitespace(self):
    self.assertMatches("foo", "foo")
    self.assertMatches("foo", "  foo  ")
    self.assertMatches("foo", "foo bar")
    self.assertDoesNotMatch("foo", "XfooX")
    self.assertDoesNotMatch("foo", "zoo")

    self.assertMatches("foo bar", "foo   bar")
    self.assertMatches("foo bar", "abc foo bar def")
    self.assertMatches("foo bar", "foo foo bar bar")

    self.assertMatches("foo bar", "foo X bar")
    self.assertDoesNotMatch("foo bar", "foo Xbar")

  def test_Pattern(self):
    self.assertMatches("foo{{A|B}}bar", "fooAbar")
    self.assertMatches("foo{{A|B}}bar", "fooBbar")
    self.assertDoesNotMatch("foo{{A|B}}bar", "fooCbar")

  def test_VariableReference(self):
    self.assertMatches("foo<<X>>bar", "foobar", {"X": ""})
    self.assertMatches("foo<<X>>bar", "fooAbar", {"X": "A"})
    self.assertMatches("foo<<X>>bar", "fooBbar", {"X": "B"})
    self.assertDoesNotMatch("foo<<X>>bar", "foobar", {"X": "A"})
    self.assertDoesNotMatch("foo<<X>>bar", "foo bar", {"X": "A"})
    with self.assertRaises(CheckerException):
      self.tryMatch("foo<<X>>bar", "foobar", {})

  def test_VariableDefinition(self):
    self.assertMatches("foo<<X:A|B>>bar", "fooAbar")
    self.assertMatches("foo<<X:A|B>>bar", "fooBbar")
    self.assertDoesNotMatch("foo<<X:A|B>>bar", "fooCbar")

    env = self.tryMatch("foo<<X:A.*B>>bar", "fooABbar", {})
    self.assertEqual(env, {"X": "AB"})
    env = self.tryMatch("foo<<X:A.*B>>bar", "fooAxxBbar", {})
    self.assertEqual(env, {"X": "AxxB"})

    self.assertMatches("foo<<X:A|B>>bar<<X>>baz", "fooAbarAbaz")
    self.assertMatches("foo<<X:A|B>>bar<<X>>baz", "fooBbarBbaz")
    self.assertDoesNotMatch("foo<<X:A|B>>bar<<X>>baz", "fooAbarBbaz")

  def test_NoVariableRedefinition(self):
    with self.assertRaises(CheckerException):
      self.tryMatch("<<X:...>><<X>><<X:...>><<X>>", "foofoobarbar")

  def test_EnvNotChangedOnPartialMatch(self):
    env = {"Y": "foo"}
    self.assertDoesNotMatch("<<X:A>>bar", "Abaz", env)
    self.assertFalse("X" in env.keys())

  def test_VariableContentEscaped(self):
    self.assertMatches("<<X:..>>foo<<X>>", ".*foo.*")
    self.assertDoesNotMatch("<<X:..>>foo<<X>>", ".*fooAAAA")


class MatchFiles_Test(unittest.TestCase):

  def assertMatches(self, checkerString, c1String):
    checkerString = \
      """
        /// CHECK-START: MyMethod MyPass
      """ + checkerString
    c1String = \
      """
        begin_compilation
          name "MyMethod"
          method "MyMethod"
          date 1234
        end_compilation
        begin_cfg
          name "MyPass"
      """ + c1String + \
      """
        end_cfg
      """
    checkerFile = ParseCheckerStream("<test-file>", "CHECK", io.StringIO(ToUnicode(checkerString)))
    c1File = ParseC1visualizerStream("<c1-file>", io.StringIO(ToUnicode(c1String)))
    assert len(checkerFile.testCases) == 1
    assert len(c1File.passes) == 1
    MatchTestCase(checkerFile.testCases[0], c1File.passes[0])

  def assertDoesNotMatch(self, checkerString, c1String):
    with self.assertRaises(MatchFailedException):
      self.assertMatches(checkerString, c1String)

  def test_Text(self):
    self.assertMatches("/// CHECK: foo bar", "foo bar")
    self.assertDoesNotMatch("/// CHECK: foo bar", "abc def")

  def test_Pattern(self):
    self.assertMatches("/// CHECK: abc {{de.}}", "abc de#")
    self.assertDoesNotMatch("/// CHECK: abc {{de.}}", "abc d#f")

  def test_Variables(self):
    self.assertMatches(
    """
      /// CHECK: foo<<X:.>>bar
      /// CHECK: abc<<X>>def
    """,
    """
      foo0bar
      abc0def
    """)
    self.assertMatches(
    """
      /// CHECK: foo<<X:([0-9]+)>>bar
      /// CHECK: abc<<X>>def
      /// CHECK: ### <<X>> ###
    """,
    """
      foo1234bar
      abc1234def
      ### 1234 ###
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK: foo<<X:([0-9]+)>>bar
      /// CHECK: abc<<X>>def
    """,
    """
      foo1234bar
      abc1235def
    """)

  def test_WholeWordMustMatch(self):
    self.assertMatches("/// CHECK: b{{.}}r", "abc bar def")
    self.assertDoesNotMatch("/// CHECK: b{{.}}r", "abc Xbar def")
    self.assertDoesNotMatch("/// CHECK: b{{.}}r", "abc barX def")
    self.assertDoesNotMatch("/// CHECK: b{{.}}r", "abc b r def")

  def test_InOrderAssertions(self):
    self.assertMatches(
    """
      /// CHECK: foo
      /// CHECK: bar
    """,
    """
      foo
      bar
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK: foo
      /// CHECK: bar
    """,
    """
      bar
      foo
    """)

  def test_NextLineAssertions(self):
    self.assertMatches(
    """
      /// CHECK:      foo
      /// CHECK-NEXT: bar
      /// CHECK-NEXT: abc
      /// CHECK:      def
    """,
    """
      foo
      bar
      abc
      def
    """)
    self.assertMatches(
    """
      /// CHECK:      foo
      /// CHECK-NEXT: bar
      /// CHECK:      def
    """,
    """
      foo
      bar
      abc
      def
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK:      foo
      /// CHECK-NEXT: bar
    """,
    """
      foo
      abc
      bar
    """)

    self.assertDoesNotMatch(
    """
      /// CHECK:      foo
      /// CHECK-NEXT: bar
    """,
    """
      bar
      foo
      abc
    """)

  def test_DagAssertions(self):
    self.assertMatches(
    """
      /// CHECK-DAG: foo
      /// CHECK-DAG: bar
    """,
    """
      foo
      bar
    """)
    self.assertMatches(
    """
      /// CHECK-DAG: foo
      /// CHECK-DAG: bar
    """,
    """
      bar
      foo
    """)

  def test_DagAssertionsScope(self):
    self.assertMatches(
    """
      /// CHECK:     foo
      /// CHECK-DAG: abc
      /// CHECK-DAG: def
      /// CHECK:     bar
    """,
    """
      foo
      def
      abc
      bar
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK:     foo
      /// CHECK-DAG: abc
      /// CHECK-DAG: def
      /// CHECK:     bar
    """,
    """
      foo
      abc
      bar
      def
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK:     foo
      /// CHECK-DAG: abc
      /// CHECK-DAG: def
      /// CHECK:     bar
    """,
    """
      foo
      def
      bar
      abc
    """)

  def test_NotAssertions(self):
    self.assertMatches(
    """
      /// CHECK-NOT: foo
    """,
    """
      abc
      def
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK-NOT: foo
    """,
    """
      abc foo
      def
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK-NOT: foo
      /// CHECK-NOT: bar
    """,
    """
      abc
      def bar
    """)

  def test_NotAssertionsScope(self):
    self.assertMatches(
    """
      /// CHECK:     abc
      /// CHECK-NOT: foo
      /// CHECK:     def
    """,
    """
      abc
      def
    """)
    self.assertMatches(
    """
      /// CHECK:     abc
      /// CHECK-NOT: foo
      /// CHECK:     def
    """,
    """
      abc
      def
      foo
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK:     abc
      /// CHECK-NOT: foo
      /// CHECK:     def
    """,
    """
      abc
      foo
      def
    """)

  def test_LineOnlyMatchesOnce(self):
    self.assertMatches(
    """
      /// CHECK-DAG: foo
      /// CHECK-DAG: foo
    """,
    """
      foo
      abc
      foo
    """)
    self.assertDoesNotMatch(
    """
      /// CHECK-DAG: foo
      /// CHECK-DAG: foo
    """,
    """
      foo
      abc
      bar
    """)

  def test_EvalAssertions(self):
    self.assertMatches("/// CHECK-EVAL: True", "foo")
    self.assertDoesNotMatch("/// CHECK-EVAL: False", "foo")

    self.assertMatches("/// CHECK-EVAL: 1 + 2 == 3", "foo")
    self.assertDoesNotMatch("/// CHECK-EVAL: 1 + 2 == 4", "foo")

    twoVarTestCase = """
                       /// CHECK-DAG: <<X:\d+>> <<Y:\d+>>
                       /// CHECK-EVAL: <<X>> > <<Y>>
                     """
    self.assertMatches(twoVarTestCase, "42 41");
    self.assertDoesNotMatch(twoVarTestCase, "42 43")