"""Tests for AI-outfit config helpers in config_service (no GUI)."""
import json
import os
import shutil
import sys
import tempfile
import unittest
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent.parent / "src"))

import services.config_service as cs


class TestOutfitConfigHelpers(unittest.TestCase):
    def setUp(self):
        self.tmp = Path(tempfile.mkdtemp())
        self._env = os.environ.get("CMBOT_DATA_DIR")
        os.environ["CMBOT_DATA_DIR"] = str(self.tmp)
        self.config_dir = self.tmp / "config"
        self.config_dir.mkdir(parents=True, exist_ok=True)

    def tearDown(self):
        if self._env is None:
            os.environ.pop("CMBOT_DATA_DIR", None)
        else:
            os.environ["CMBOT_DATA_DIR"] = self._env
        shutil.rmtree(str(self.tmp), ignore_errors=True)

    # -- ai_models.json -------------------------------------------------

    def test_load_ai_models_missing_returns_empty(self):
        self.assertEqual(cs.load_ai_models(), [])

    def test_load_ai_models_object_with_models_list(self):
        (self.config_dir / "ai_models.json").write_text(
            json.dumps({"models": [{"name": "m1", "url": "https://x"}]}),
            encoding="utf-8")
        models = cs.load_ai_models()
        self.assertEqual(len(models), 1)
        self.assertEqual(models[0]["name"], "m1")

    def test_load_ai_models_bare_list(self):
        (self.config_dir / "ai_models.json").write_text(
            json.dumps([{"name": "a"}, {"name": "b"}]), encoding="utf-8")
        self.assertEqual(len(cs.load_ai_models()), 2)

    def test_load_ai_models_corrupt_returns_empty(self):
        (self.config_dir / "ai_models.json").write_text("{ not json", encoding="utf-8")
        self.assertEqual(cs.load_ai_models(), [])

    def test_load_ai_models_tolerates_bom(self):
        (self.config_dir / "ai_models.json").write_bytes(
            "".encode("utf-8") + json.dumps([{"name": "z"}]).encode("utf-8"))
        self.assertEqual(cs.load_ai_models()[0]["name"], "z")

    # -- outfit_prompt.txt ----------------------------------------------

    def test_prompt_default_when_missing(self):
        self.assertEqual(cs.load_outfit_prompt(), cs.DEFAULT_OUTFIT_PROMPT)

    def test_prompt_save_then_load_roundtrip(self):
        cs.save_outfit_prompt("hello {title} {product_id}")
        self.assertEqual(cs.load_outfit_prompt(), "hello {title} {product_id}")

    def test_prompt_saved_without_bom(self):
        cs.save_outfit_prompt("abc")
        raw = (self.config_dir / "outfit_prompt.txt").read_bytes()
        self.assertFalse(raw.startswith(b"\xef\xbb\xbf"))


if __name__ == "__main__":
    unittest.main()