import copy

import pytest
from conftest import golden_manifest

from target_revenue import validation


def test_golden_manifest_is_conformant():
    validation.validate_phase_manifest(golden_manifest())


def test_manifest_missing_longstop_is_rejected():
    manifest = copy.deepcopy(golden_manifest())
    del manifest["phase"]["longstop_at"]
    with pytest.raises(validation.ConformanceError):
        validation.validate_phase_manifest(manifest)


def test_manifest_bad_future_license_is_rejected():
    manifest = copy.deepcopy(golden_manifest())
    manifest["phase"]["future_license"] = "GPL-3.0"
    with pytest.raises(validation.ConformanceError):
        validation.validate_phase_manifest(manifest)


def test_manifest_missing_required_field_is_rejected():
    manifest = copy.deepcopy(golden_manifest())
    del manifest["phase"]["initial_target"]
    with pytest.raises(validation.ConformanceError):
        validation.validate_phase_manifest(manifest)


def test_manifest_rejects_unknown_top_level_field():
    manifest = copy.deepcopy(golden_manifest())
    manifest["unexpected_field"] = True
    with pytest.raises(validation.ConformanceError):
        validation.validate_phase_manifest(manifest)


def test_initial_target_amount_immutable_across_versions():
    published = golden_manifest()
    candidate = copy.deepcopy(published)
    candidate["phase"]["initial_target"]["amount"] = 70000
    errors = validation.check_manifest_immutability(published, candidate)
    assert errors, "reducing initial_target.amount must be flagged"
    assert "initial_target.amount" in errors[0]


def test_phase_id_immutable_across_versions():
    published = golden_manifest()
    candidate = copy.deepcopy(published)
    candidate["phase"]["id"] = "trsl:phase:example-002"
    errors = validation.check_manifest_immutability(published, candidate)
    assert errors
    assert "phase.id" in errors[0]


def test_unchanged_manifest_has_no_immutability_violations():
    manifest = golden_manifest()
    assert validation.check_manifest_immutability(manifest, manifest) == []