"""Stage 0 (ingest/from_sap.py) — SAP 응답을 가짜로 넣어 저장 형식과 normalize 연결을 확인한다.

실제 SAP 은 부르지 않는다. 응답 모양은 ../abap-api-tester/tools/spec/samples 의 실측 JSON 과 같다.
"""
from __future__ import annotations

import json

import pytest

from ingest import from_sap
from ingest.normalize import classify, parse_collected_file, run as normalize_run

PROGRAM_LIST = {
    "RETURN": {"TYPE": "S", "MESSAGE": "", "TOTAL_ROWS": "2"},
    "RESULT": [
        {"OBJ_NAME": "ZFIR0010", "TEXT": "거래처 I/F 이력", "SUBC": "1", "UDAT": "2024-01-02", "UNAM": "U1"},
        {"OBJ_NAME": "SAPMZSFT0", "TEXT": "달력 유지보수", "SUBC": "M", "UDAT": "2020-10-16", "UNAM": "U2"},
    ],
}

SOURCES = {
    "ZFIR0010": {
        "RETURN": {"TYPE": "S", "MESSAGE": "", "TOTAL_ROWS": "0"},
        "PROGRAM": "ZFIR0010",
        "SOURCE_CODE": "REPORT zfir0010.\nINCLUDE zfir0010_top.\nSTART-OF-SELECTION.\n  PERFORM main.\n",
        "INCLUDE_LIST": [
            {"INCL_NAME": "ZFIR0010_TOP", "SOURCE": "DATA gv_bukrs TYPE bukrs.\n"},
            {"INCL_NAME": "DB__SSEL", "SOURCE": ""},                 # 빈 소스는 버린다
            {"INCL_NAME": "ZFIR0010_TOP", "SOURCE": "DATA dup.\n"},  # 중복은 버린다
        ],
        "SCREEN_LIST": "",
        "TCODE_LIST": [{"TCODE": "ZFIR0010", "TTEXT": "거래처 I/F 이력조회", "PGMNA": "ZFIR0010"}],
    },
    "SAPMZSFT0": {
        "RETURN": {"TYPE": "E", "MESSAGE": "프로그램 소스를 읽을 수 없습니다", "TOTAL_ROWS": "0"},
        "PROGRAM": "SAPMZSFT0", "SOURCE_CODE": "", "INCLUDE_LIST": "", "SCREEN_LIST": "", "TCODE_LIST": "",
    },
}


def fake_sap_call(method: str, params: dict, timeout: int = 180) -> dict:
    if method == "GET_PROGRAM_LIST":
        assert params["IV_PACKAGE"] == "ZFI01"
        data = PROGRAM_LIST
    elif method == "GET_PROGRAM_SOURCE":
        assert params["IV_WITH_INCLUDE"] == "X"
        data = SOURCES[params["IV_PROGRAM"]]
    else:
        raise AssertionError(method)
    ret = data["RETURN"]
    return {"method": method, "parsed": data, "error": None,
            "return": {"type": ret["TYPE"], "message": ret["MESSAGE"]}}


@pytest.fixture
def sap(monkeypatch):
    import sap.sap_client as client
    monkeypatch.setattr(client, "sap_call", fake_sap_call)
    monkeypatch.setattr(from_sap.time, "sleep", lambda s: None)


def test_run_writes_raw_files_and_records_errors(tmp_path, sap):
    stats = from_sap.run(["zfi01"], tmp_path)
    assert stats == {"packages": 1, "listed": 2, "fetched": 1, "skipped": 0, "errors": 1, "includes": 2}

    # 패키지 목록: normalize 가 package_list 로 분류하는 모양
    pkg = parse_collected_file((tmp_path / "ZFI01.txt").read_text(encoding="utf-8"))
    assert classify(pkg) == "package_list"
    assert pkg[0] == {"DEVCLASS": "ZFI01", "OBJ_NAME": "ZFIR0010", "TEXT": "거래처 I/F 이력",
                      "CREATED_ON": "", "CHANGED_ON": "2024-01-02"}

    # 프로그램 소스: 메인 + 인클루드(빈 것·중복 제외), 줄바꿈은 JSON 이스케이프로 보존
    prog = parse_collected_file((tmp_path / "ZFIR0010.txt").read_text(encoding="utf-8"))
    assert classify(prog) == "program_source"
    assert prog["DESCRIPTION"] == "거래처 I/F 이력"
    assert [i["INCLUDE"] for i in prog["INCLUDE_PROGRAM"]] == ["ZFIR0010", "ZFIR0010_TOP"]
    assert prog["INCLUDE_PROGRAM"][0]["SOURCE_CODE"].splitlines()[0] == "REPORT zfir0010."
    assert prog["TEXT_SYMBOL"] == []
    assert prog["TCODE_LIST"][0]["TCODE"] == "ZFIR0010"

    # 실패한 프로그램은 파일 없이 _errors.log 에
    assert not (tmp_path / "SAPMZSFT0.txt").exists()
    assert "SAPMZSFT0\tSOURCE\tSAP 오류" in (tmp_path / "_errors.log").read_text(encoding="utf-8")


def test_rerun_skips_existing_unless_force(tmp_path, sap):
    from_sap.run(["ZFI01"], tmp_path)
    again = from_sap.run(["ZFI01"], tmp_path)
    assert again["skipped"] == 1 and again["fetched"] == 0
    forced = from_sap.run(["ZFI01"], tmp_path, force=True)
    assert forced["fetched"] == 1


def test_normalize_consumes_output_and_builds_tcodes(tmp_path, sap):
    raw, out = tmp_path / "raw", tmp_path / "normalized"
    from_sap.run(["ZFI01"], raw)
    stats = normalize_run(raw, out)
    assert stats["programs"] == 1 and stats["package_rows"] == 2 and stats["errors"] == 0

    assert (out / "ZFIR0010" / "ZFIR0010.abap").read_text(encoding="utf-8").startswith("REPORT zfir0010.\n")
    assert (out / "ZFIR0010" / "ZFIR0010_TOP.abap").exists()
    meta = json.loads((out / "ZFIR0010" / "ZFIR0010.meta.json").read_text(encoding="utf-8"))
    assert meta["description"] == "거래처 I/F 이력" and len(meta["includes"]) == 2

    tcodes = [json.loads(l) for l in (out / "tcodes.jsonl").read_text(encoding="utf-8").splitlines()]
    assert tcodes == [{"tcode": "ZFIR0010", "program": "ZFIR0010", "text_ko": "거래처 I/F 이력조회"}]


def test_dry_run_writes_nothing(tmp_path, sap):
    stats = from_sap.run(["ZFI01"], tmp_path, dry_run=True)
    assert stats["listed"] == 2 and stats["fetched"] == 0
    assert list(tmp_path.iterdir()) == []