"""Project file emitter regression."""

import json

from tools.epro2.kicad.pro_writer import write_kicad_pro


def test_pro_carries_filename_and_root_sheet_uuid():
    """The .kicad_pro must record (a) its own filename so KiCad confirms
    the basename matches the .kicad_sch / .kicad_pcb siblings, and (b)
    the root sheet uuid in the `sheets` array — that's how KiCad binds
    the project to the schematic root. A `sheets: []` pro file works
    for "open a one-off PCB" but loses cross-tool navigation in the
    schematic editor."""
    text = write_kicad_pro("EchoEar-CoreBoard", root_sheet_uuid="abc-123")
    j = json.loads(text)
    assert j["meta"]["filename"] == "EchoEar-CoreBoard.kicad_pro"
    assert j["sheets"] == [["abc-123", ""]]


def test_pro_without_root_uuid_emits_empty_sheets_array():
    """When called for a board that has only a PCB (the SCH was
    DELETE_DOC), there's no root sheet uuid. Emit `sheets: []` so
    the project file still parses — KiCad will simply not show a
    schematic editor on open."""
    text = write_kicad_pro("OnlyPcb", root_sheet_uuid=None)
    j = json.loads(text)
    assert j["sheets"] == []


def test_pro_top_level_keys_present_for_kicad_8():
    """KiCad 8 expects certain top-level keys to exist (it'll
    backfill missing ones but with a "save changes?" prompt every
    open). Smoke-test: assert the keys that GUI reads at startup."""
    text = write_kicad_pro("X")
    j = json.loads(text)
    for key in ("board", "meta", "schematic", "sheets", "net_settings"):
        assert key in j, f"missing top-level key: {key}"