"""
test_bw_ascii_report.py — parser for Blastware's per-event ASCII export.

Run:
    python -m pytest tests/test_bw_ascii_report.py -q
"""

from __future__ import annotations

import datetime
import os
import sys
from pathlib import Path

import pytest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from minimateplus.bw_ascii_report import (
    BwAsciiReport,
    parse_report,
    parse_report_file,
)


FIXTURES = Path(__file__).parent.parent / "decode-re" / "5-8-26"


def _fixture(event_name: str) -> Path:
    """Find the .TXT file inside a fixture event folder."""
    for p in (FIXTURES / event_name).iterdir():
        if p.suffix.lower() == ".txt":
            return p
    raise FileNotFoundError(f"no .TXT in {FIXTURES / event_name}")


# ── Identity / config ───────────────────────────────────────────────────────


def test_event_c_identity_and_config():
    r = parse_report_file(_fixture("event-c"))

    assert r.event_type == "Full Waveform"
    assert r.serial == "BE11529"
    assert r.file_name == "M529LK44.AB0"
    assert r.event_datetime == datetime.datetime(2026, 4, 23, 15, 56, 35)

    assert r.trigger_channel == "Vert"
    assert r.geo_trigger_level_ips == pytest.approx(0.5)
    assert r.pretrig_s == pytest.approx(-0.25)
    assert r.record_time_s == pytest.approx(1.0)
    assert r.record_stop_mode == "Fixed"
    assert r.sample_rate_sps == 1024
    assert r.battery_volts == pytest.approx(6.8)
    assert r.calibration_date == datetime.date(2025, 4, 29)
    assert r.calibration_by == "Instantel"
    assert r.units == "in/s and dB(L)"


def test_event_c_operator_metadata():
    r = parse_report_file(_fixture("event-c"))

    # The "Project: : value" pattern (key has its own trailing colon)
    # is handled by stripping the colon at lookup time.
    assert r.project == "Test4-21-26"
    assert r.client == "Test-Client1"
    assert r.operator == "Brian and claude"
    assert r.sensor_location == "catbed"


def test_event_c_geo_range():
    r = parse_report_file(_fixture("event-c"))
    assert r.geo_range_ips == pytest.approx(10.0)


# ── Per-channel derived stats ───────────────────────────────────────────────


def test_event_c_per_channel_stats():
    r = parse_report_file(_fixture("event-c"))

    tran = r.channels["Tran"]
    assert tran.ppv_ips         == pytest.approx(0.065)
    assert tran.zc_freq_hz      == pytest.approx(47.0)
    assert tran.time_of_peak_s  == pytest.approx(0.007)
    assert tran.peak_accel_g    == pytest.approx(0.066)
    assert tran.peak_disp_in    == pytest.approx(0.001)

    vert = r.channels["Vert"]
    assert vert.ppv_ips         == pytest.approx(0.610)
    assert vert.zc_freq_hz      == pytest.approx(16.0)
    assert vert.time_of_peak_s  == pytest.approx(0.024)
    assert vert.peak_accel_g    == pytest.approx(0.437)
    assert vert.peak_disp_in    == pytest.approx(0.006)

    long_ = r.channels["Long"]
    assert long_.ppv_ips        == pytest.approx(0.070)
    assert long_.zc_freq_hz     == pytest.approx(22.0)
    assert long_.time_of_peak_s == pytest.approx(0.019)
    assert long_.peak_accel_g   == pytest.approx(0.040)
    assert long_.peak_disp_in   == pytest.approx(0.001)


def test_event_c_micl_stats():
    r = parse_report_file(_fixture("event-c"))

    # MicL specific block
    assert r.mic.weighting       == "Linear Weighting"
    assert r.mic.pspl_dbl        == pytest.approx(88.0)
    assert r.mic.zc_freq_hz      == pytest.approx(57.0)
    assert r.mic.time_of_peak_s  == pytest.approx(-0.004)

    # Mirrored onto channels["MicL"] for uniform per-channel access
    micl_ch = r.channels["MicL"]
    assert micl_ch.zc_freq_hz     == pytest.approx(57.0)
    assert micl_ch.time_of_peak_s == pytest.approx(-0.004)


def test_event_c_vector_sum():
    r = parse_report_file(_fixture("event-c"))
    assert r.peak_vector_sum_ips    == pytest.approx(0.612)
    assert r.peak_vector_sum_time_s == pytest.approx(0.024)


# ── Sensor self-check ───────────────────────────────────────────────────────


def test_event_c_sensor_check_geo_channels():
    r = parse_report_file(_fixture("event-c"))

    for ch_name, expected_freq, expected_ratio in [
        ("Tran", 7.4, 3.7),
        ("Vert", 7.6, 3.5),
        ("Long", 7.5, 3.8),
    ]:
        sc = r.sensor_check[ch_name]
        assert sc.test_freq_hz   == pytest.approx(expected_freq), ch_name
        assert sc.test_ratio     == pytest.approx(expected_ratio), ch_name
        assert sc.test_results   == "Passed", ch_name
        # Geo channels don't have an Test Amplitude
        assert sc.test_amplitude_mv is None


def test_event_c_sensor_check_micl():
    r = parse_report_file(_fixture("event-c"))

    sc = r.sensor_check["MicL"]
    assert sc.test_freq_hz       == pytest.approx(20.1)
    assert sc.test_amplitude_mv  == pytest.approx(533.0)
    assert sc.test_results       == "Passed"
    # MicL doesn't have a ratio — it has amplitude instead
    assert sc.test_ratio is None


# ── Monitor log + tooling ───────────────────────────────────────────────────


def test_event_c_monitor_log_and_pc_version():
    r = parse_report_file(_fixture("event-c"))

    assert len(r.monitor_log) == 1
    e = r.monitor_log[0]
    assert e.start_time == datetime.datetime(2026, 4, 23, 15, 46, 16)
    assert e.stop_time  == datetime.datetime(2026, 4, 23, 15, 56, 36)
    assert e.description == "Event recorded."

    assert r.pc_sw_version == "V 10.74"


# ── Sample table ─────────────────────────────────────────────────────────────


def test_event_c_sample_table_parsed_when_requested():
    r = parse_report_file(_fixture("event-c"), parse_samples=True)

    # 1 sec event @ 1024 sps + 0.25 sec pretrig = 1280 samples
    assert r.samples is not None
    assert len(r.samples) == 1280, f"expected 1280 samples, got {len(r.samples)}"

    # First row: "0.000     \t0.005     \t0.005     \t-81.94"
    t, v, l, m = r.samples[0]
    assert t == pytest.approx(0.000)
    assert v == pytest.approx(0.005)
    assert l == pytest.approx(0.005)
    assert m == pytest.approx(-81.94)


def test_event_c_sample_table_skipped_by_default():
    r = parse_report_file(_fixture("event-c"))
    assert r.samples is None


# ── Cross-event smoke ───────────────────────────────────────────────────────


@pytest.mark.parametrize("event_name", ["event-a", "event-b", "event-c", "event-d"])
def test_all_fixtures_parse_without_error(event_name):
    """Every fixture in the bundle must parse cleanly with the same parser."""
    r = parse_report_file(_fixture(event_name))

    # Common invariants: serial, event_datetime, sample rate, all four
    # channels surfaced.
    assert r.serial == "BE11529"
    assert r.event_datetime is not None
    assert r.sample_rate_sps in (1024, 2048, 4096)
    for ch in ("Tran", "Vert", "Long", "MicL"):
        assert ch in r.channels
        assert ch in r.sensor_check

    # PVS should be present and positive on triggered events
    if r.peak_vector_sum_ips is not None:
        assert r.peak_vector_sum_ips >= 0


# ── Edge cases / defensive parsing ──────────────────────────────────────────


def test_parse_empty_input():
    r = parse_report("")
    assert r.serial is None
    assert r.event_datetime is None
    assert all(cs.ppv_ips is None for cs in r.channels.values())


def test_parse_unknown_keys_ignored():
    """Forward-compat: future BW versions may add fields we don't recognise.
    Those should be silently dropped, not raise."""
    text = (
        '"Serial Number : BE99999"\n'
        '"Future Field That Does Not Exist : 42 widgets"\n'
        '"Tran PPV : 0.123 in/s"\n'
    )
    r = parse_report(text)
    assert r.serial == "BE99999"
    assert r.channels["Tran"].ppv_ips == pytest.approx(0.123)


def test_parse_numeric_with_units_strips_unit():
    text = (
        '"Vert PPV : 1.275 in/s"\n'
        '"Vert ZC Freq : 23 Hz"\n'
        '"MicL  Test Amplitude : 569 mv"\n'
    )
    r = parse_report(text)
    assert r.channels["Vert"].ppv_ips    == pytest.approx(1.275)
    assert r.channels["Vert"].zc_freq_hz == pytest.approx(23.0)
    assert r.sensor_check["MicL"].test_amplitude_mv == pytest.approx(569.0)


def test_parse_handles_micl_double_space_in_key():
    """BW writes "MicL  Time of Peak" with TWO spaces; the parser must
    normalise whitespace before key lookup."""
    text = (
        '"MicL  Time of Peak : 0.012 sec"\n'
        '"MicL  ZC Freq : 51 Hz"\n'
    )
    r = parse_report(text)
    assert r.mic.time_of_peak_s == pytest.approx(0.012)
    assert r.mic.zc_freq_hz     == pytest.approx(51.0)


# ── Position-based user-notes parsing ───────────────────────────────────────
#
# The 4 user-supplied note slots (Project / Client / User Name / Seis Loc
# by default) have OPERATOR-EDITABLE labels in BW's Compliance Setup →
# Notes tab.  An operator could rename them to "Building:", "Site:",
# "Address:", etc. and the ASCII export would write those labels
# verbatim.  We parse by POSITION between the `Units :` and `Geo Range :`
# anchors, NOT by matching the label text.


def _wrap_user_notes(*lines: str) -> str:
    """Helper: wrap N user-note lines in the minimal context the parser
    needs (`Units :` opens the block, `Geo Range :` closes it)."""
    body = ['"Units : in/s and dB(L)"']
    body.extend('"' + l + '"' for l in lines)
    body.append('"Geo Range : 10.000 in/s"')
    return "\n".join(body) + "\n"


def test_user_notes_default_labels_populate_by_position():
    """The BW-default labels (Project / Client / User Name / Seis Loc)
    populate the four canonical slots in order."""
    r = parse_report(_wrap_user_notes(
        "Project: : Test4-21-26",
        "Client: : Acme Inc",
        "User Name: : Brian",
        "Seis Loc: : Catbed",
    ))
    assert r.project          == "Test4-21-26"
    assert r.client           == "Acme Inc"
    assert r.operator         == "Brian"
    assert r.sensor_location  == "Catbed"
    assert r.user_note_labels == {
        "project":         "Project:",
        "client":          "Client:",
        "operator":        "User Name:",
        "sensor_location": "Seis Loc:",
    }


def test_user_notes_operator_renamed_labels_still_populate():
    """If the operator renames the labels in BW's UI (e.g. "Seis Loc:"
    → "Building:"), the values STILL populate the canonical slots by
    position — and the operator's labels are preserved in
    `user_note_labels` for terra-view to display."""
    r = parse_report(_wrap_user_notes(
        "Building : Main Office",
        "Project Manager : Brian",
        "Inspector : Claude",
        "Site Address : 123 Main St",
    ))
    assert r.project         == "Main Office"
    assert r.client          == "Brian"
    assert r.operator        == "Claude"
    assert r.sensor_location == "123 Main St"
    assert r.user_note_labels == {
        "project":         "Building",
        "client":          "Project Manager",
        "operator":        "Inspector",
        "sensor_location": "Site Address",
    }


def test_user_notes_with_histogram_label_spelling():
    """Histogram exports use 'Seis. Location:' (with period and colon)
    instead of 'Seis Loc:'.  Position-based parsing handles both."""
    r = parse_report(_wrap_user_notes(
        "Project: : Plum Cont.- Rainbow Run",
        "Client: : Plum Contracting In.c",
        "User Name: : Terra-Mechanics Inc.",
        "Seis. Location: : Loc #1 - 2652 Hepner",
    ))
    assert r.project == "Plum Cont.- Rainbow Run"
    assert r.client == "Plum Contracting In.c"
    assert r.operator == "Terra-Mechanics Inc."
    assert r.sensor_location == "Loc #1 - 2652 Hepner"
    # And the histogram's specific label spelling is preserved
    assert r.user_note_labels["sensor_location"] == "Seis. Location:"


def test_user_notes_outside_block_are_ignored():
    """Lines that look like user-notes but appear OUTSIDE the
    Units→Geo Range range don't get assigned to user-note slots."""
    # No Units anchor — these lines shouldn't populate user-note slots
    text = (
        '"Serial Number : BE11529"\n'
        '"Project: : SHOULD NOT POPULATE"\n'
    )
    r = parse_report(text)
    assert r.serial == "BE11529"
    assert r.project is None


def test_user_notes_partial_block_only_fills_present_slots():
    """If BW writes fewer than 4 user-notes (e.g. operator disabled
    Extended Notes mid-block), only the present positions populate;
    later slots stay None."""
    r = parse_report(_wrap_user_notes(
        "Project: : Just-a-project",
        "Client: : Just-a-client",
    ))
    assert r.project == "Just-a-project"
    assert r.client  == "Just-a-client"
    assert r.operator is None
    assert r.sensor_location is None


def test_user_notes_extra_lines_beyond_four_are_dropped():
    """If somehow more than 4 lines appear in the user-notes block
    (e.g. BW adds an Extended Notes line), only the first 4 are
    captured — slots 5+ have nowhere to go."""
    r = parse_report(_wrap_user_notes(
        "L1 : v1",
        "L2 : v2",
        "L3 : v3",
        "L4 : v4",
        "L5 : v5",   # ignored — no fifth slot
    ))
    assert r.project         == "v1"
    assert r.client          == "v2"
    assert r.operator        == "v3"
    assert r.sensor_location == "v4"
    # 5th label not captured
    assert "L5" not in r.user_note_labels.values()


def test_oorange_marker_treated_as_saturation():
    """BW writes 'OORANGE' (Out Of Range — truncated) when a channel
    exceeds its full-scale.  Verify ppv_ips falls back to geo_range_ips
    + saturated flag is set, mirroring the real T190LD5Q.LK0W,
    T438L713.RY0W, and K557L3YM.OE0W events from prod 2026-05-27.
    """
    txt = """\
"Event Type : Full Waveform"
"Serial Number : BE18190"
"Geo Range : 10.000 in/s"
"Tran PPV : 2.140 in/s"
"Vert PPV : OORANGE in/s"
"Long PPV : 2.830 in/s"
"Peak Vector Sum : OORANGE in/s"
"Peak Vector Sum TimeSum : 0.007 s"
"MicL PSPL : OORANGE "
"""
    r = parse_report(txt)
    # Tran/Long parse normally
    assert r.channels["Tran"].ppv_ips == 2.14
    assert r.channels["Tran"].ppv_saturated is False
    assert r.channels["Long"].ppv_ips == 2.83
    # Vert saturated → range max + flag
    assert r.channels["Vert"].ppv_ips == 10.0
    assert r.channels["Vert"].ppv_saturated is True
    # PVS saturated → sqrt(3) * range_max as upper bound + flag
    import math
    assert r.peak_vector_sum_ips == pytest.approx(math.sqrt(3) * 10.0)
    assert r.peak_vector_sum_saturated is True
    # Mic saturated → 140 dBL conservative upper bound + flag
    assert r.mic.pspl_dbl == 140.0
    assert r.mic.pspl_saturated is True
    # PVS time still parses despite the BW typo'd label "TimeSum"
    assert r.peak_vector_sum_time_s == pytest.approx(0.007)


def test_real_oorange_event_t190_parses():
    """End-to-end against the real T190LD5Q.LK0W ASCII file pulled from
    a Windows watcher PC on 2026-05-27.  This is the canonical example
    of the parser-PPV-miss bug we fixed in this iteration."""
    fixture_path = (
        Path(__file__).parent.parent / "example-events" /
        "ascii-5-27-26" / "T190LD5Q_LK0W_ASCII.TXT"
    )
    if not fixture_path.exists():
        pytest.skip("real ASCII fixture not present (local-only)")
    r = parse_report_file(fixture_path)
    assert r.serial == "BE18190"
    assert r.geo_range_ips == 10.0
    # Tran reads cleanly, Vert was OORANGE
    assert r.channels["Tran"].ppv_ips == pytest.approx(2.14)
    assert r.channels["Vert"].ppv_ips == 10.0
    assert r.channels["Vert"].ppv_saturated is True
    assert r.channels["Long"].ppv_ips == pytest.approx(2.83)
    assert r.peak_vector_sum_saturated is True
    assert r.peak_vector_sum_time_s == pytest.approx(0.007)


def test_real_histogram_fixture_populates_sensor_location():
    """End-to-end: the histogram fixture uses 'Seis. Location:' — must
    successfully populate sensor_location via position-based parsing."""
    fixture_dir = (
        Path(__file__).parent.parent / "example-events" / "histogram"
    )
    if not fixture_dir.exists():
        pytest.skip("histogram fixtures not present")
    txt = next(fixture_dir.glob("*_ASCII.TXT"), None)
    if txt is None:
        pytest.skip("no histogram TXT in fixture dir")

    r = parse_report_file(txt)
    assert r.sensor_location is not None
    assert len(r.sensor_location) > 0
    assert r.user_note_labels.get("sensor_location") is not None
    # Sanity: other shared fields still parse correctly
    assert r.serial is not None
    assert r.serial.startswith("BE")
    assert r.geo_range_ips is not None