"""Tests for the M4 health report's log scanner (synthetic input)."""

import unittest
from pathlib import Path
from unittest import mock

from rigdoctor.core import health
from rigdoctor.core.health import (
    CRITICAL,
    INFO,
    WARNING,
    check_pcie_links,
    run_health_checks,
    scan_journal_text,
)


class HealthScanTests(unittest.TestCase):
    def test_xid_79_is_critical(self):
        text = "NVRM: Xid (PCI:0000:01:00): 79, pid=1234, GPU has fallen off the bus."
        findings = scan_journal_text(text)
        gpu = [f for f in findings if f.category == "GPU"]
        self.assertEqual(len(gpu), 1)
        self.assertIn("79", gpu[0].title)
        self.assertEqual(gpu[0].severity, CRITICAL)

    def test_xid_count_aggregates(self):
        text = "\n".join(["NVRM: Xid (PCI:0000:01:00): 79, foo"] * 3)
        gpu = [f for f in scan_journal_text(text) if f.category == "GPU"][0]
        self.assertIn("×3", gpu.title)

    def test_oom_and_panic_detected(self):
        text = "Out of memory: Killed process 999 (game)\nKernel panic - not syncing: x"
        cats = {f.category for f in scan_journal_text(text)}
        self.assertIn("Memory", cats)
        self.assertIn("Kernel", cats)

    def test_mce_critical(self):
        findings = scan_journal_text("mce: [Hardware Error]: Machine check events logged")
        self.assertTrue(any(f.severity == CRITICAL and f.category == "Hardware" for f in findings))

    def test_clean_text_yields_no_findings(self):
        self.assertEqual(scan_journal_text("usb 1-1: new high-speed USB device\nbluetooth: ok"), [])

    def test_run_health_checks_returns_findings(self):
        # Runs against the real system; just assert it returns a sorted list of Findings.
        findings = run_health_checks()
        self.assertIsInstance(findings, list)
        severities = [f.severity for f in findings]
        order = {"critical": 0, "warning": 1, "info": 2, "ok": 3}
        ranks = [order.get(s, 9) for s in severities]
        self.assertEqual(ranks, sorted(ranks))


class PcieLinkCheckTests(unittest.TestCase):
    def _with_link(self, cur_g, cur_w, max_g, max_w):
        # one fake NVMe controller returning the given link tuple
        return (mock.patch("rigdoctor.core.inventory.nvme_controllers",
                           return_value=[("nvme0", Path("/x"))]),
                mock.patch("rigdoctor.core.inventory.read_link",
                           return_value=(cur_g, cur_w, max_g, max_w)))

    def test_reduced_width_is_a_warning_about_lane_sharing(self):
        ctrls, link = self._with_link(4, "2", 4, "4")  # Gen4 x2 but supports x4
        with ctrls, link:
            findings = check_pcie_links()
        self.assertEqual(len(findings), 1)
        self.assertEqual(findings[0].severity, WARNING)
        self.assertIn("lane-sharing", findings[0].detail)

    def test_reduced_speed_only_is_info(self):
        ctrls, link = self._with_link(3, "4", 4, "4")  # Gen3 x4 but supports Gen4
        with ctrls, link:
            findings = check_pcie_links()
        self.assertEqual(len(findings), 1)
        self.assertEqual(findings[0].severity, INFO)

    def test_full_speed_no_finding(self):
        ctrls, link = self._with_link(4, "4", 4, "4")
        with ctrls, link:
            self.assertEqual(check_pcie_links(), [])


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