# Copyright 2021 The Pigweed Authors
#
# 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
#
#     https://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.
"""Tests for pw_console.text_formatting"""

import logging
import unittest
from datetime import datetime
from parameterized import parameterized  # type: ignore

from pw_console.log_line import LogLine
from pw_console.widgets.table import TableView

_TIMESTAMP_FORMAT = '%Y%m%d %H:%M:%S'
_TIMESTAMP_SAMPLE = datetime(2021, 6, 30, 16, 10, 37, 818901)
_TIMESTAMP_SAMPLE_STRING = _TIMESTAMP_SAMPLE.strftime(_TIMESTAMP_FORMAT)

_TABLE_PADDING = ('', TableView.COLUMN_PADDING)

formatter = logging.Formatter(
    '\x1b[30m\x1b[47m'
    '%(asctime)s'
    '\x1b[0m'
    ' '
    '\x1b[33m\x1b[1m'
    '%(levelname)s'
    '\x1b[0m'
    ' '
    '%(message)s', _TIMESTAMP_FORMAT)


def make_log(**kwargs):
    """Create a LogLine instance."""
    # Construct a LogRecord
    attributes = dict(name='testlogger',
                      levelno=logging.INFO,
                      levelname='INF',
                      msg='[%s] %.3f %s',
                      args=('MOD1', 3.14159, 'Real message here'),
                      created=_TIMESTAMP_SAMPLE.timestamp(),
                      filename='test.py',
                      lineno=42,
                      pathname='/home/user/test.py')
    # Override any above attrs that are passed in.
    attributes.update(kwargs)
    # Create the record
    record = logging.makeLogRecord(dict(attributes))
    # Format
    formatted_message = formatter.format(record)
    log_line = LogLine(record=record,
                       formatted_log=formatted_message,
                       ansi_stripped_log='')
    log_line.update_metadata()
    return log_line


class TestTableView(unittest.TestCase):
    """Tests for rendering log lines into tables."""
    def setUp(self):
        # Show large diffs
        self.maxDiff = None  # pylint: disable=invalid-name

    @parameterized.expand([
        (
            'Correct column widths with all fields set',
            [
                make_log(
                    args=('M1', 1.2345, 'Something happened'),
                    extra_metadata_fields=dict(module='M1', time=12)),

                make_log(
                    args=('MD2', 567.5, 'Another cool event'),
                    extra_metadata_fields=dict(module='MD2', time=123)),
            ],
            dict(module=len('MD2'), time=len('123')),
        ),
        (
            'Missing metadata fields on some rows',
            [
                make_log(
                    args=('M1', 54321.2, 'Something happened'),
                    extra_metadata_fields=dict(module='M1', time=54321.2)),

                make_log(
                    args=('MOD2', 567.5, 'Another cool event'),
                    extra_metadata_fields=dict(module='MOD2')),
            ],
            dict(module=len('MOD2'), time=len('54321.200')),
        ),
    ]) # yapf: disable
    def test_column_widths(self, _name, logs, expected_widths) -> None:
        """Test colum widths calculation."""
        table = TableView()
        for log in logs:
            table.update_metadata_column_widths(log)
            # update_metadata_column_widths shoulp populate self.metadata.fields
            self.assertEqual(log.metadata.fields,
                             log.record.extra_metadata_fields)
        # Check expected column widths
        self.assertEqual(dict(table.column_widths), expected_widths)

    @parameterized.expand([
        (
            'Build header adding fields incrementally',
            [
                make_log(
                    args=('MODULE2', 567.5, 'Another cool event'),
                    extra_metadata_fields=dict(
                        # timestamp missing
                        module='MODULE2')),

                make_log(
                    args=('MODULE1', 54321.2, 'Something happened'),
                    extra_metadata_fields=dict(
                        # timestamp added in
                        module='MODULE1', timestamp=54321.2)),
            ],
            [
                [('bold', 'Time             '), _TABLE_PADDING,
                 ('bold', 'Lvl'), _TABLE_PADDING,
                 ('bold', 'Module   '),
                 ('bold', 'Message')],

                [('bold', 'Time             '), _TABLE_PADDING,
                 ('bold', 'Lvl'), _TABLE_PADDING,
                 # timestamp added in
                 ('bold', 'Timestamp  '),
                 ('bold', 'Module   '),
                 ('bold', 'Message')],
            ],
        ),
    ]) # yapf: disable
    def test_formatted_header(self, _name, logs, expected_headers) -> None:
        """Test colum widths calculation."""
        table = TableView()
        for log, header in zip(logs, expected_headers):
            table.update_metadata_column_widths(log)
            self.assertEqual(table.formatted_header(), header)

    @parameterized.expand([
        (
            'Build rows adding fields incrementally',
            [
                make_log(
                    args=('MODULE2', 567.5, 'Another cool event'),
                    extra_metadata_fields=dict(
                        # timestamp missing
                        module='MODULE2',
                        msg='Another cool event')),

                make_log(
                    args=('MODULE2', 567.5, 'Another cool event'),
                    extra_metadata_fields=dict(
                        # timestamp and msg missing
                        module='MODULE2')),

                make_log(
                    args=('MODULE1', 54321.2, 'Something happened'),
                    extra_metadata_fields=dict(
                        # timestamp added in
                        module='MODULE1', timestamp=54321.2,
                        msg='Something happened')),
            ],
            [
                [
                    ('class:log-time', _TIMESTAMP_SAMPLE_STRING),
                    _TABLE_PADDING,
                    ('class:log-level-20', 'INF'),
                    _TABLE_PADDING,
                    ('class:log-table-column-3', 'MODULE2  '),
                    ('', 'Another cool event'),
                    ('', '\n')
                ],

                [
                    ('class:log-time', _TIMESTAMP_SAMPLE_STRING),
                    _TABLE_PADDING,
                    ('class:log-level-20', 'INF'),
                    _TABLE_PADDING,
                    ('class:log-table-column-3', 'MODULE2  '),
                    ('', '[MODULE2] 567.500 Another cool event'),
                    ('', '\n')
                ],

                [
                    ('class:log-time', _TIMESTAMP_SAMPLE_STRING),
                    _TABLE_PADDING,
                    ('class:log-level-20', 'INF'),
                    _TABLE_PADDING,
                    ('class:log-table-column-3', '54321.200  '),
                    ('class:log-table-column-4', 'MODULE1  '),
                    ('', 'Something happened'),
                    ('', '\n')
                ],
            ],
        ),
    ]) # yapf: disable
    def test_formatted_rows(self, _name, logs, expected_log_format) -> None:
        """Test colum widths calculation."""
        table = TableView()
        # Check each row meets expected formats incrementally.
        for log, formatted_log in zip(logs, expected_log_format):
            table.update_metadata_column_widths(log)
            self.assertEqual(table.formatted_row(log), formatted_log)


if __name__ == '__main__':
    unittest.main()