"""Tests offline de comfyui_append_styles — no toca la instalación real ni la red.

Usa un styles.json temporal en /tmp para validar merge, dedup, backup, validación y dry-run.
"""
import json
import os
import sys
import tempfile

sys.path.insert(0, os.path.dirname(__file__))

from comfyui_append_styles import comfyui_append_styles, DEFAULT_NEGATIVE


def _write_styles(tmpdir: str, data: dict) -> str:
    path = os.path.join(tmpdir, "styles.json")
    with open(path, "w", encoding="utf-8") as fh:
        json.dump(data, fh, ensure_ascii=False, indent=4)
    return path


def test_merge_preserva_existentes_y_anade_nuevos():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {
            "A": {"prompt": "a-style", "negative_prompt": "neg-a"},
            "B": {"prompt": "b-style", "negative_prompt": "neg-b"},
        })
        res = comfyui_append_styles(
            {"C": {"prompt": "c-style", "negative_prompt": "neg-c"}},
            styles_path=path,
        )
        assert res["total_before"] == 2
        assert res["total_after"] == 3
        assert res["added"] == ["C"]
        loaded = json.load(open(path, encoding="utf-8"))
        # Los existentes intactos.
        assert loaded["A"] == {"prompt": "a-style", "negative_prompt": "neg-a"}
        assert loaded["B"] == {"prompt": "b-style", "negative_prompt": "neg-b"}
        assert loaded["C"] == {"prompt": "c-style", "negative_prompt": "neg-c"}


def test_dedup_no_pisa_por_defecto():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {"A": {"prompt": "orig", "negative_prompt": "n"}})
        res = comfyui_append_styles(
            {"A": {"prompt": "NUEVO", "negative_prompt": "n2"}},
            styles_path=path,
        )
        assert res["skipped_existing"] == ["A"]
        assert res["added"] == []
        assert res["total_after"] == 1
        loaded = json.load(open(path, encoding="utf-8"))
        assert loaded["A"]["prompt"] == "orig"  # preservado


def test_overwrite_si_se_pide():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {"A": {"prompt": "orig", "negative_prompt": "n"}})
        res = comfyui_append_styles(
            {"A": {"prompt": "NUEVO", "negative_prompt": "n2"}},
            styles_path=path,
            overwrite=True,
        )
        assert res["overwritten"] == ["A"]
        loaded = json.load(open(path, encoding="utf-8"))
        assert loaded["A"]["prompt"] == "NUEVO"


def test_negative_por_defecto_cuando_falta():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {})
        res = comfyui_append_styles(
            {"X": {"prompt": "solo-prompt"}},  # sin negative_prompt
            styles_path=path,
        )
        assert res["added"] == ["X"]
        loaded = json.load(open(path, encoding="utf-8"))
        assert loaded["X"]["negative_prompt"] == DEFAULT_NEGATIVE


def test_entradas_invalidas_se_descartan():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {})
        res = comfyui_append_styles(
            {
                "ok": {"prompt": "valido"},
                "vacio": {"prompt": "   "},      # prompt vacío
                "no_dict": "string",             # no es dict
                "sin_prompt": {"negative_prompt": "n"},
            },
            styles_path=path,
        )
        assert res["added"] == ["ok"]
        assert set(res["invalid"]) == {"vacio", "no_dict", "sin_prompt"}
        assert res["total_after"] == 1


def test_backup_creado():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {"A": {"prompt": "a", "negative_prompt": "n"}})
        res = comfyui_append_styles(
            {"B": {"prompt": "b"}},
            styles_path=path,
        )
        assert res["backup_path"]
        assert os.path.isfile(res["backup_path"])
        # El backup contiene el estado ANTERIOR (sólo A).
        bk = json.load(open(res["backup_path"], encoding="utf-8"))
        assert list(bk) == ["A"]


def test_dry_run_no_escribe():
    with tempfile.TemporaryDirectory() as d:
        path = _write_styles(d, {"A": {"prompt": "a", "negative_prompt": "n"}})
        before = open(path, encoding="utf-8").read()
        res = comfyui_append_styles(
            {"B": {"prompt": "b"}},
            styles_path=path,
            dry_run=True,
        )
        assert res["dry_run"] is True
        assert res["added"] == ["B"]
        assert res["total_after"] == 2  # calculado
        assert res["backup_path"] == ""
        after = open(path, encoding="utf-8").read()
        assert before == after  # archivo intacto


if __name__ == "__main__":
    for name, fn in sorted(globals().items()):
        if name.startswith("test_") and callable(fn):
            fn()
            print("PASS", name)
    print("OK")