from datetime import datetime, timezone
from pathlib import Path

import pytest

from app.action_catalog import ACTION_CODES, FLOW_V2_BUSINESS_ACTION_CODES, TRIAGE_ACTION_CODES
from app.blif_flow_v2_projection_service import _projection_value, rebuild_blif_flow_v2_projection


def derived_row(**overrides):
    row = {
        "opportunity_id": "11111111-1111-1111-1111-111111111111",
        "material_process_key": "odoo_sale_name:s00001",
        "canonical_process_id": "11111111-1111-1111-1111-111111111111",
        "raw_v2": {
            "business_state": "PROFORMA_REQUIRED",
            "business_next_action": "CREATE_PROFORMA",
            "diagnostic_status": "clear",
            "confidence": "high",
            "precedence": "business_transition",
            "reason": "Current order intent requires a proforma.",
        },
        "evidence": {
            "latest_relevant_inbound": {"id": "m1", "at": "2026-08-15T00:00:00+00:00"},
            "latest_relevant_outbound": None, "proforma": [], "invoice": [],
            "payment": [], "odoo": [], "reconciliation": [],
        },
    }
    row.update(overrides)
    return row


def test_migration_011_is_additive_reversible_and_does_not_touch_stage():
    up = Path("migrations/011_blif_flow_v2_persistence.sql").read_text()
    down = Path("migrations/011_blif_flow_v2_persistence_down.sql").read_text()
    assert "CREATE TABLE IF NOT EXISTS opportunity_flow_state_v2" in up
    assert "CREATE TABLE IF NOT EXISTS opportunity_flow_transitions" in up
    for column in ("resolution_code", "resolved_at", "resolved_by_event_id", "superseded_by_task_id"):
        assert f"ADD COLUMN IF NOT EXISTS {column}" in up
        assert f"DROP COLUMN IF EXISTS {column}" in down
    assert "DROP TABLE IF EXISTS opportunity_flow_state_v2" in down
    assert "UPDATE opportunities" not in up
    assert "stage =" not in up


def test_flow_v2_actions_are_separate_from_existing_triage_and_runtime_actions():
    assert FLOW_V2_BUSINESS_ACTION_CODES == {
        "CREATE_PROFORMA", "CREATE_INVOICE", "VALIDATE_ODOO_ORDER", "COMPLETE_OPPORTUNITY",
    }
    assert "CREATE_JASMIN_QUOTE" not in FLOW_V2_BUSINESS_ACTION_CODES
    assert FLOW_V2_BUSINESS_ACTION_CODES.isdisjoint(TRIAGE_ACTION_CODES)
    assert FLOW_V2_BUSINESS_ACTION_CODES.isdisjoint(ACTION_CODES)


def test_projection_fingerprint_is_stable_and_excludes_derived_time():
    first = _projection_value(derived_row(), datetime(2026, 8, 15, tzinfo=timezone.utc))
    second = _projection_value(derived_row(), datetime(2026, 8, 16, tzinfo=timezone.utc))
    assert first["source_fingerprint"] == second["source_fingerprint"]
    assert first["business_next_action"] == "CREATE_PROFORMA"
    assert first["evidence_refs"] == [{
        "source": "message", "role": "latest_relevant_inbound", "id": "m1",
        "at": "2026-08-15T00:00:00+00:00",
    }]


def test_duplicate_projection_persists_canonical_material_identity():
    row = derived_row(
        opportunity_id="22222222-2222-2222-2222-222222222222",
        canonical_process_id="11111111-1111-1111-1111-111111111111",
    )
    value = _projection_value(row, datetime.now(timezone.utc))
    assert value["is_duplicate_representation"] is True
    assert value["canonical_opportunity_id"] == "11111111-1111-1111-1111-111111111111"
    assert value["material_process_key"] == "odoo_sale_name:s00001"


def test_off_mode_is_a_noop_without_deriving_or_connecting():
    assert rebuild_blif_flow_v2_projection(mode="off") == {
        "mode": "off", "projection_count": 0, "transitions_written": 0, "disabled": True,
    }


@pytest.mark.parametrize("mode", ["compare", "authoritative", "invalid"])
def test_unimplemented_modes_fail_closed(mode):
    with pytest.raises(RuntimeError, match="not implemented"):
        rebuild_blif_flow_v2_projection(mode=mode, derived_rows=[])