# [DEF:TestLogger:Module]
# @SEMANTICS: logging, tests, belief_state, cot, json
# @PURPOSE: Unit tests for the custom logger CoT JSON formatters and configuration context manager.
# @LAYER: Logging (Tests)
# @RELATION: VERIFIES -> src/core/logger.py
# @INVARIANT: All required log statements must correctly check the threshold.

import pytest
import logging

from src.core.logger import (
    belief_scope,
    logger,
    configure_logger,
    get_task_log_level,
    should_log_task_level,
    CotJsonFormatter,
)
from src.core.config_models import LoggingConfig


@pytest.fixture(autouse=True)
def reset_logger_state():
    """Reset logger state before each test to avoid cross-test contamination."""
    config = LoggingConfig(
        level="INFO",
        task_log_level="INFO",
        enable_belief_state=True
    )
    configure_logger(config)
    # Also reset the logger level for caplog to work correctly
    logging.getLogger("superset_tools_app").setLevel(logging.DEBUG)
    yield
    # Reset after test too
    config = LoggingConfig(
        level="INFO",
        task_log_level="INFO",
        enable_belief_state=True
    )
    configure_logger(config)


# [DEF:test_belief_scope_logs_reason_reflect_at_debug:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that belief_scope generates REASON and REFLECT CoT markers at DEBUG level.
# @PRE: belief_scope is available. caplog fixture is used. Logger configured to DEBUG.
# @POST: Logs are verified to contain REASON (entry) and REFLECT (coherence) markers.
def test_belief_scope_logs_reason_reflect_at_debug(caplog):
    """Test that belief_scope generates REASON and REFLECT CoT markers at DEBUG level."""
    # Configure logger to DEBUG level
    config = LoggingConfig(
        level="DEBUG",
        task_log_level="DEBUG",
        enable_belief_state=True
    )
    configure_logger(config)

    caplog.set_level("DEBUG")

    with belief_scope("TestFunction"):
        logger.info("Doing something important")

    # Check that the records contain the expected markers
    reason_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REASON' and getattr(r, 'src', None) == 'TestFunction'
    ]
    reflect_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REFLECT' and getattr(r, 'src', None) == 'TestFunction'
    ]
    info_records = [
        r for r in caplog.records
        if r.levelname == 'INFO' and 'Doing something important' in r.getMessage()
    ]

    assert len(reason_records) >= 1, "REASON marker not found for TestFunction"
    assert len(reflect_records) >= 1, "REFLECT marker not found for TestFunction"
    assert len(info_records) >= 1, "INFO log 'Doing something important' not found"

    # Reset to INFO
    config = LoggingConfig(level="INFO", task_log_level="INFO", enable_belief_state=True)
    configure_logger(config)
# [/DEF:test_belief_scope_logs_reason_reflect_at_debug:Function]


# [DEF:test_belief_scope_error_handling:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that belief_scope logs EXPLORE marker on exception.
# @PRE: belief_scope is available. caplog fixture is used. Logger configured to DEBUG.
# @POST: Logs are verified to contain EXPLORE marker with error context.
def test_belief_scope_error_handling(caplog):
    """Test that belief_scope logs EXPLORE marker on exception."""
    # Configure logger to DEBUG level
    config = LoggingConfig(
        level="DEBUG",
        task_log_level="DEBUG",
        enable_belief_state=True
    )
    configure_logger(config)

    caplog.set_level("DEBUG")

    with pytest.raises(ValueError):
        with belief_scope("FailingFunction"):
            raise ValueError("Something went wrong")

    # Check that an EXPLORE marker was emitted
    explore_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'EXPLORE'
        and getattr(r, 'src', None) == 'FailingFunction'
    ]

    assert len(explore_records) >= 1, f"EXPLORE marker not found for FailingFunction. Logs: {[(r.levelname, getattr(r, 'marker', ''), r.getMessage()) for r in caplog.records]}"
    assert 'Something went wrong' in explore_records[0].getMessage() or \
           'Something went wrong' in str(getattr(explore_records[0], 'error', ''))

    # Reset to INFO
    config = LoggingConfig(level="INFO", task_log_level="INFO", enable_belief_state=True)
    configure_logger(config)
# [/DEF:test_belief_scope_error_handling:Function]


# [DEF:test_belief_scope_success_coherence:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that belief_scope logs REFLECT marker on success.
# @PRE: belief_scope is available. caplog fixture is used. Logger configured to DEBUG.
# @POST: Logs are verified to contain REFLECT marker.
def test_belief_scope_success_coherence(caplog):
    """Test that belief_scope logs REFLECT marker on success."""
    # Configure logger to DEBUG level
    config = LoggingConfig(
        level="DEBUG",
        task_log_level="DEBUG",
        enable_belief_state=True
    )
    configure_logger(config)

    caplog.set_level("DEBUG")

    with belief_scope("SuccessFunction"):
        pass

    reflect_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REFLECT'
        and getattr(r, 'src', None) == 'SuccessFunction'
    ]

    assert len(reflect_records) >= 1, f"REFLECT marker not found for SuccessFunction. Logs: {[(r.levelname, getattr(r, 'marker', ''), r.getMessage()) for r in caplog.records]}"
    assert 'Coherence OK' in reflect_records[0].getMessage() or \
           getattr(reflect_records[0], 'intent', '') == 'Coherence OK'


# [/DEF:test_belief_scope_success_coherence:Function]


# [DEF:test_belief_scope_reason_not_visible_at_info:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that belief_scope REASON/REFLECT markers are NOT visible at INFO level.
# @PRE: belief_scope is available. caplog fixture is used.
# @POST: REASON/REFLECT markers are not captured at INFO level.
def test_belief_scope_reason_not_visible_at_info(caplog):
    """Test that belief_scope REASON/REFLECT markers are NOT visible at INFO level."""
    caplog.set_level("INFO")

    with belief_scope("InfoLevelFunction"):
        logger.info("Doing something important")

    # The REASON and REFLECT markers are debug-level, so they should NOT appear at INFO
    reason_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REASON' and getattr(r, 'src', None) == 'InfoLevelFunction'
    ]
    reflect_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REFLECT' and getattr(r, 'src', None) == 'InfoLevelFunction'
    ]

    assert len(reason_records) == 0, "REASON marker should not be visible at INFO"
    assert len(reflect_records) == 0, "REFLECT marker should not be visible at INFO"

    # But the INFO-level message should be visible
    info_records = [
        r for r in caplog.records
        if r.levelname == 'INFO' and 'Doing something important' in r.getMessage()
    ]
    assert len(info_records) >= 1, "INFO log 'Doing something important' should be visible"
# [/DEF:test_belief_scope_reason_not_visible_at_info:Function]


# [DEF:test_task_log_level_default:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that default task log level is INFO.
# @PRE: None.
# @POST: Default level is INFO.
def test_task_log_level_default():
    """Test that default task log level is INFO."""
    level = get_task_log_level()
    assert level == "INFO"
# [/DEF:test_task_log_level_default:Function]


# [DEF:test_should_log_task_level:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that should_log_task_level correctly filters log levels.
# @PRE: None.
# @POST: Filtering works correctly for all level combinations.
def test_should_log_task_level():
    """Test that should_log_task_level correctly filters log levels."""
    # Default level is INFO
    assert should_log_task_level("ERROR") is True, "ERROR should be logged at INFO threshold"
    assert should_log_task_level("WARNING") is True, "WARNING should be logged at INFO threshold"
    assert should_log_task_level("INFO") is True, "INFO should be logged at INFO threshold"
    assert should_log_task_level("DEBUG") is False, "DEBUG should NOT be logged at INFO threshold"
# [/DEF:test_should_log_task_level:Function]


# [DEF:test_configure_logger_task_log_level:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that configure_logger updates task_log_level.
# @PRE: LoggingConfig is available.
# @POST: task_log_level is updated correctly.
def test_configure_logger_task_log_level():
    """Test that configure_logger updates task_log_level."""
    config = LoggingConfig(
        level="DEBUG",
        task_log_level="DEBUG",
        enable_belief_state=True
    )
    configure_logger(config)

    assert get_task_log_level() == "DEBUG", "task_log_level should be DEBUG"
    assert should_log_task_level("DEBUG") is True, "DEBUG should be logged at DEBUG threshold"

    # Reset to INFO
    config = LoggingConfig(
        level="INFO",
        task_log_level="INFO",
        enable_belief_state=True
    )
    configure_logger(config)
    assert get_task_log_level() == "INFO", "task_log_level should be reset to INFO"
# [/DEF:test_configure_logger_task_log_level:Function]


# [DEF:test_enable_belief_state_flag:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that enable_belief_state flag controls belief_scope entry logging.
# @PRE: LoggingConfig is available. caplog fixture is used.
# @POST: REASON entry marker suppressed when disabled; REFLECT coherence still logged.
def test_enable_belief_state_flag(caplog):
    """Test that enable_belief_state flag controls belief_scope REASON entry logging."""
    # Disable belief state
    config = LoggingConfig(
        level="DEBUG",
        task_log_level="DEBUG",
        enable_belief_state=False
    )
    configure_logger(config)

    caplog.set_level("DEBUG")

    with belief_scope("DisabledFunction"):
        logger.info("Doing something")

    # REASON entry marker should NOT be logged when disabled
    reason_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REASON' and getattr(r, 'src', None) == 'DisabledFunction'
    ]
    assert len(reason_records) == 0, "REASON entry should not be logged when disabled"

    # REFLECT coherence marker should still be logged (internal tracking)
    reflect_records = [
        r for r in caplog.records
        if getattr(r, 'marker', None) == 'REFLECT' and getattr(r, 'src', None) == 'DisabledFunction'
    ]
    assert len(reflect_records) >= 1, "REFLECT coherence should still be logged"

    # Re-enable for other tests
    config = LoggingConfig(
        level="DEBUG",
        task_log_level="DEBUG",
        enable_belief_state=True
    )
    configure_logger(config)
# [/DEF:test_enable_belief_state_flag:Function]

# [DEF:test_cot_json_formatter_output:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that CotJsonFormatter produces valid JSON with expected fields.
def test_cot_json_formatter_output():
    """Test that CotJsonFormatter produces valid JSON with expected fields."""
    import json
    from datetime import datetime, timezone

    formatter = CotJsonFormatter()

    # Create a LogRecord with structured extra data
    record = logging.LogRecord(
        name="test.module",
        level=logging.INFO,
        pathname="/fake/path.py",
        lineno=42,
        msg="Test action",
        args=(),
        exc_info=None,
    )
    record.marker = "REASON"
    record.intent = "Test action"
    record.src = "TestModule"
    record.payload = {"key": "value"}

    output = formatter.format(record)
    parsed = json.loads(output)

    assert parsed["level"] == "INFO"
    assert parsed["marker"] == "REASON"
    assert parsed["intent"] == "Test action"
    assert parsed["src"] == "TestModule"
    assert parsed["payload"] == {"key": "value"}
    assert "ts" in parsed
    assert "trace_id" in parsed
# [/DEF:test_cot_json_formatter_output:Function]

# [DEF:test_cot_json_formatter_plain_message:Function]
# @RELATION: BINDS_TO -> TestLogger
# @PURPOSE: Test that CotJsonFormatter wraps plain messages (no extra) with default marker.
def test_cot_json_formatter_plain_message():
    """Test that CotJsonFormatter wraps plain messages with default marker."""
    import json

    formatter = CotJsonFormatter()

    # Create a LogRecord WITHOUT extra data (plain message)
    record = logging.LogRecord(
        name="test.module",
        level=logging.INFO,
        pathname="/fake/path.py",
        lineno=42,
        msg="Plain info message",
        args=(),
        exc_info=None,
    )

    output = formatter.format(record)
    parsed = json.loads(output)

    assert parsed["level"] == "INFO"
    assert parsed["marker"] == "REASON"  # default for plain messages
    assert parsed["intent"] == "Plain info message"
    assert parsed["src"] == "test.module"
    assert "ts" in parsed
    assert "trace_id" in parsed
# [/DEF:test_cot_json_formatter_plain_message:Function]

# [/DEF:TestLogger:Module]