"""
Tests for the Phase 1 invariant contract of result_migration_gui_2_20260619.

This file locks the Phase 1 site inventory contract: there are exactly 42
migration-target error-handling sites in src/gui_2.py. Both tests are static
invariants that must pass before Phase 1 closes and Phase 2 begins:

- test_phase_1_inventory_has_42_rows: parses the markdown inventory table
  (tests/artifacts/PHASE1_SITE_INVENTORY.md) and asserts the Site Inventory
  table contains exactly 42 rows.
- test_phase_1_audit_has_42_migration_target_sites: invokes the audit script
  (scripts/audit_exception_handling.py --src src --json), finds the
  src/gui_2.py file record, and counts the sites whose category is in the
  migration-target set (i.e., NOT INTERNAL_COMPLIANT, NOT
  INTERNAL_PROGRAMMER_RAISE, NOT BOUNDARY_*).

The migration-target category set is defined per
conductor/code_styleguides/error_handling.md as: any category that is not one
of the 5 "leave-as-is" categories. The migration-target sites are the ones
the Phase 2-N migration will touch; the leave-as-is categories are legitimate
non-migration patterns (compliant internal try/except, programmer raises,
and the 3 boundary categories).
"""
import json
import re
import subprocess
from pathlib import Path


INVENTORY_PATH = Path("tests/artifacts/PHASE1_SITE_INVENTORY.md")
EXPECTED_SITE_COUNT = 42
MIGRATION_EXCLUDE_CATEGORIES = frozenset({
 "INTERNAL_COMPLIANT",
 "INTERNAL_PROGRAMMER_RAISE",
 "BOUNDARY_FASTAPI",
 "BOUNDARY_SDK",
 "BOUNDARY_CONVERSION",
})


def test_phase_1_inventory_has_42_rows():
 """
 Parse tests/artifacts/PHASE1_SITE_INVENTORY.md and verify the "Site Inventory"
 markdown table contains exactly 42 rows.

 The Site Inventory table begins with a header row of the form
 "| L# | Category | Phase | ..." and a separator row "|---...". Each data row
 has the form "| <line_number> | <CATEGORY> | <phase_number> | ...". The test
 locates the header by its leading "| L#" sentinel and counts subsequent rows
 that match the data-row pattern until the first non-table line.
 """
 text = INVENTORY_PATH.read_text(encoding="utf-8")
 lines = text.splitlines()
 header_idx = None
 for i, line in enumerate(lines):
  if line.startswith("| L#"):
   header_idx = i
   break
 assert header_idx is not None, (
  f"Could not find '| L#' header in {INVENTORY_PATH}. "
  f"The inventory file format may have changed."
 )
 rows = []
 for line in lines[header_idx + 2:]:
  if not line.startswith("|"):
   break
  if re.match(r"^\|\s*\d+\s*\|", line):
   rows.append(line)
 assert len(rows) == EXPECTED_SITE_COUNT, (
  f"PHASE1_SITE_INVENTORY.md has {len(rows)} site rows; expected "
  f"{EXPECTED_SITE_COUNT}. The inventory must list exactly 42 migration-target "
  f"sites in src/gui_2.py."
 )


def test_phase_1_audit_has_42_migration_target_sites():
 """
 Invoke scripts/audit_exception_handling.py --src src --json, parse the JSON
 output, and verify that the src/gui_2.py file record contains exactly 42
 sites in the migration-target category set.

 A site is "migration-target" when its category is NOT one of:
 - INTERNAL_COMPLIANT (legitimate compliant internal try/except)
 - INTERNAL_PROGRAMMER_RAISE (raise for impossible/programmer states)
 - BOUNDARY_FASTAPI (FastAPI HTTPException boundary)
 - BOUNDARY_SDK (SDK call boundary conversion)
 - BOUNDARY_CONVERSION (broad except used as conversion boundary)

 The migration-target set is therefore:
 INTERNAL_BROAD_CATCH | INTERNAL_SILENT_SWALLOW | INTERNAL_RETHROW |
 INTERNAL_OPTIONAL_RETURN | UNCLEAR.

 This test pins the audit output to the same 42 the inventory declares, so a
 future audit-script regression or inventory drift will surface here.
 """
 result = subprocess.run(
  ["uv", "run", "python", "scripts/audit_exception_handling.py", "--src", "src", "--json"],
  capture_output=True,
  text=True,
 )
 assert result.returncode == 0, (
  f"audit_exception_handling.py exited {result.returncode}; stderr:\n"
  f"{result.stderr[:2000]}"
 )
 data = json.loads(result.stdout)
 gui2_files = [f for f in data.get("files", []) if "gui_2" in f.get("filename", "")]
 assert gui2_files, (
  "audit JSON contained no file record matching 'gui_2' in filename. "
  f"Filenames seen: {[f.get('filename') for f in data.get('files', [])][:10]}"
 )
 gui2 = gui2_files[0]
 findings = gui2.get("findings", [])
 migration_sites = [f for f in findings if f.get("category") not in MIGRATION_EXCLUDE_CATEGORIES]
 assert len(migration_sites) == EXPECTED_SITE_COUNT, (
  f"src/gui_2.py has {len(migration_sites)} migration-target sites in the audit; "
  f"expected {EXPECTED_SITE_COUNT}. Categories seen: "
  f"{sorted({f.get('category') for f in migration_sites})}. "
  f"This must match the 42 sites declared in PHASE1_SITE_INVENTORY.md."
 )


def test_phase_2_invariant_drain_plane_render_functions_exist():
 """
 Verify the 3 new module-level render functions exist in src/gui_2.py:
 - render_controller_error_modal
 - _render_worker_error_indicator
 - _render_last_request_errors_modal

 These are the drain-plane functions added in Phase 2 of the
 result_migration_gui_2_20260619 track. They read the 8 controller
 error attributes (added by sub-track 3 Phase 6) and surface them
 to the user via ImGui popups and indicators.

 The test imports src.gui_2 and inspects the module for the function
 names. A failure here means the drain-plane wiring is incomplete.
 """
 import inspect
 import src.gui_2 as gui2_mod
 assert hasattr(gui2_mod, "render_controller_error_modal"), (
  "src/gui_2.py is missing the module-level function "
  "'render_controller_error_modal'. This is the FR-DP-1 drain plane "
  "function; it must be added per the result_migration_gui_2_20260619 "
  "Phase 2 spec."
 )
 assert hasattr(gui2_mod, "_render_worker_error_indicator"), (
  "src/gui_2.py is missing the module-level function "
  "'_render_worker_error_indicator'. This is the FR-DP-2 drain plane "
  "function; it must be added per the result_migration_gui_2_20260619 "
  "Phase 2 spec."
 )
 assert hasattr(gui2_mod, "_render_last_request_errors_modal"), (
  "src/gui_2.py is missing the module-level function "
  "'_render_last_request_errors_modal'. This is the FR-DP-3 drain plane "
  "function; it must be added per the result_migration_gui_2_20260619 "
  "Phase 2 spec."
 )
 assert callable(getattr(gui2_mod, "render_controller_error_modal")), (
  "render_controller_error_modal exists but is not callable."
 )
 assert callable(getattr(gui2_mod, "_render_worker_error_indicator")), (
  "_render_worker_error_indicator exists but is not callable."
 )
 assert callable(getattr(gui2_mod, "_render_last_request_errors_modal")), (
  "_render_last_request_errors_modal exists but is not callable."
 )


def test_phase_2_invariant_drain_plane_app_delegations_exist():
 """
 Verify the 3 new App class delegation methods exist in src/gui_2.py:
 - App._render_controller_error_modal
 - App._render_worker_error_indicator
 - App._render_last_request_errors_modal

 Per conductor/product-guidelines.md §"UI Delegation for Hot-Reload",
 the App class must contain only thin delegation wrappers; the actual
 logic lives in module-level functions. This test locks the
 delegation contract for Phase 2.

 The test imports src.gui_2, gets the App class via the module
 (lazily - via the _LazyModule path or directly), and checks for
 the methods.
 """
 import src.gui_2 as gui2_mod
 app_cls = getattr(gui2_mod, "App", None)
 assert app_cls is not None, (
  "src.gui_2 has no 'App' class attribute. Cannot verify delegations."
 )
 for method_name in (
  "_render_controller_error_modal",
  "_render_worker_error_indicator",
  "_render_last_request_errors_modal",
 ):
  assert hasattr(app_cls, method_name), (
   f"App class is missing delegation method '{method_name}'. "
   f"The drain plane requires the App class to delegate to the "
   f"module-level render functions so the UI delegation pattern "
   f"supports hot-reload."
  )
  method = getattr(app_cls, method_name)
  assert callable(method), (
   f"App.{method_name} exists but is not callable."
  )