"""Ce intra in index (preferinta de format) si cum se taie XML-ul in chunk-uri."""

from __future__ import annotations

import pytest

import indexer
import store

XML = """<?xml version="1.0" encoding="UTF-8"?>
<erori_rag versiune="1.0">
<!-- comentariu -->
<eroare_stocuri_negative>
    <keywords>stocuri negative NIR</keywords>
    <mesaj_eroare>Documentul nu poate fi sters: stocuri negative pentru BANDA HARTIE.</mesaj_eroare>
    <rezolvare>Optiuni firma &gt; VERIFICARESTOCNEGATIV = 0.</rezolvare>
</eroare_stocuri_negative>
<eroare_a_doua>
    <mesaj_eroare>Alta eroare.</mesaj_eroare>
    <rezolvare>Alta rezolvare.</rezolvare>
</eroare_a_doua>
</erori_rag>"""


# ------------------------------------------------------- preferinta de format
def test_xml_umbreste_md_cu_acelasi_nume(write):
    write("d406.xml", "<r><a>x</a></r>")
    write("d406.md", "versiune veche")
    umbrite = {d["name"]: d["shadowed_by"] for d in store.list_documents()}
    assert umbrite["d406.md"] == "d406.xml"
    assert umbrite["d406.xml"] is None
    assert [d["name"] for d in store.documents_for_index()] == ["d406.xml"]


def test_md_umbreste_txt(write):
    write("x.md", "md")
    write("x.txt", "txt")
    assert [d["name"] for d in store.documents_for_index()] == ["x.md"]


def test_fisierele_fara_pereche_raman_toate(write):
    write("bilant.md", "a")
    write("roagest.xml", "<r><a>b</a></r>")
    write("note.txt", "c")
    assert len(store.documents_for_index()) == 3


def test_depozitul_e_vizibil_intreg_chiar_daca_nu_tot_se_indexeaza(write):
    write("d406.xml", "<r><a>x</a></r>")
    write("d406.md", "vechi")
    assert len(store.list_documents()) == 2      # dashboard le arata pe ambele
    assert len(store.documents_for_index()) == 1  # indexul ia doar una


def test_extensiile_necunoscute_sunt_ignorate(write):
    write("chatflow.json", "{}")
    write("script.ps1", "echo")
    assert store.list_documents() == []


@pytest.mark.parametrize("name", ["a.xml", "a.md", "a.txt"])
def test_numele_acceptate(name):
    assert store.validate_name(name) == name


@pytest.mark.parametrize("name", ["a.json", "a.pdf", "../a.md", "a b.md"])
def test_numele_respinse(name):
    with pytest.raises(ValueError):
        store.validate_name(name)


# ----------------------------------------------------------- chunking XML
def test_o_problema_ramane_un_singur_chunk():
    """Miezul: mesajul de eroare si rezolvarea NU trebuie separate."""
    chunks = indexer.chunk_document("x.xml", XML)
    assert len(chunks) == 2
    assert "BANDA HARTIE" in chunks[0] and "VERIFICARESTOCNEGATIV" in chunks[0]
    assert "Alta eroare" in chunks[1] and "Alta rezolvare" in chunks[1]


def test_etichetele_raman_ca_etichete_fara_paranteze():
    chunk = indexer.chunk_document("x.xml", XML)[0]
    assert "mesaj eroare:" in chunk and "rezolvare:" in chunk
    assert "<mesaj_eroare>" not in chunk


def test_entitatile_sunt_decodate():
    assert "&gt;" not in indexer.chunk_document("x.xml", XML)[0]


def test_comentariile_nu_devin_chunk():
    assert not any("comentariu" in c for c in indexer.chunk_document("x.xml", XML))


def test_xml_invalid_cade_pe_taierea_obisnuita():
    chunks = indexer.chunk_document("stricat.xml", "<root><neinchis>")
    assert chunks == ["<root><neinchis>"]


def test_xml_fara_copii_e_tratat_ca_text():
    assert indexer.chunk_document("x.xml", "<root>doar text</root>") == ["doar text"]


def test_element_urias_e_taiat_mai_departe():
    mare = "<r><a>" + ("propozitie lunga. " * 500) + "</a></r>"
    chunks = indexer.chunk_document("x.xml", mare)
    assert len(chunks) > 1
    assert all(len(c) < indexer.MAX_XML_CHUNK * 2 for c in chunks)


def test_md_foloseste_taierea_pe_paragrafe():
    text = "primul paragraf\n\n" + "al doilea paragraf " * 20
    assert len(indexer.chunk_document("x.md", text)) >= 1
    assert indexer.chunk_document("x.md", text) == indexer.chunk_text(text)


# --------------------------------------------- concurenta intre reindexari
def test_lacatul_refuza_a_doua_reindexare():
    """Timer-ul nu trebuie sa porneasca peste o sincronizare manuala."""
    import config

    with config.exclusive():
        with pytest.raises(config.Busy):
            with config.exclusive():
                pass


def test_lacatul_se_elibereaza_dupa_iesire():
    import config

    with config.exclusive():
        pass
    with config.exclusive():   # trebuie sa mearga din nou
        pass


def test_lacatul_se_elibereaza_si_la_exceptie():
    import config

    with pytest.raises(ValueError):
        with config.exclusive():
            raise ValueError("ceva")
    with config.exclusive():
        pass


def test_indexul_se_scrie_atomic(write, monkeypatch):
    """Consumer-ul reciteste indexul la 30s; nu are voie sa prinda JSON pe jumatate."""
    import config
    import indexer

    write("x.md", "un paragraf oarecare")
    monkeypatch.setattr(indexer, "embed", lambda text: [0.1, 0.2])
    vazute = []
    real_replace = indexer.os.replace

    def spion(src, dst):
        vazute.append((str(src), str(dst)))
        return real_replace(src, dst)

    monkeypatch.setattr(indexer.os, "replace", spion)
    indexer.build()
    assert vazute and vazute[0][1] == str(config.INDEX_FILE)
    assert not config.INDEX_FILE.with_suffix(".json.tmp").exists()


def test_xml_invalid_e_raportat_ca_avertisment(write, monkeypatch):
    import indexer

    write("stricat.xml", "<root><a>x</a></root><in-plus/>")
    monkeypatch.setattr(indexer, "embed", lambda text: [0.0])
    out = indexer.build()
    assert any("stricat.xml" in w for w in out.get("warnings", []))


def test_xml_valid_nu_produce_avertismente(write, monkeypatch):
    import indexer

    write("bun.xml", "<root><a>x</a></root>")
    monkeypatch.setattr(indexer, "embed", lambda text: [0.0])
    assert "warnings" not in indexer.build()


# --- refolosirea embeddings-urilor la reindexare -----------------------------

def test_vectorii_din_indexul_vechi_se_refolosesc(monkeypatch, write, tmp_path):
    """Un document nou nu are voie sa reforteze embeddings-urile celorlalte.

    Pe CPU un embedding costa ~7 secunde; fara refolosire, adaugarea unui
    document la un index de 170 de chunk-uri inseamna 20 de minute de asteptare.
    """
    import json
    import config
    import indexer

    write("primul.md", "text vechi, deja indexat")
    calculate = []

    def fals_embed(chunk):
        calculate.append(chunk)
        return [0.5, 0.5]

    monkeypatch.setattr(indexer, "embed", fals_embed)

    indexer.build()
    assert calculate == ["text vechi, deja indexat"]

    calculate.clear()
    write("al-doilea.md", "text nou")
    rezultat = indexer.build()

    # doar chunk-ul nou s-a calculat
    assert calculate == ["text nou"]
    assert rezultat["embeddings_noi"] == 1
    assert rezultat["embeddings_refolosite"] == 1

    index = json.loads(config.INDEX_FILE.read_text(encoding="utf-8"))
    assert {e["source"] for e in index} == {"primul.md", "al-doilea.md"}


def test_textul_modificat_se_reembedeaza(monkeypatch, write):
    import indexer

    write("doc.md", "prima varianta")
    monkeypatch.setattr(indexer, "embed", lambda chunk: [1.0])
    indexer.build()

    calculate = []

    def fals_embed(chunk):
        calculate.append(chunk)
        return [2.0]

    monkeypatch.setattr(indexer, "embed", fals_embed)
    write("doc.md", "varianta modificata")
    rezultat = indexer.build()

    assert calculate == ["varianta modificata"]
    assert rezultat["embeddings_refolosite"] == 0