"""Tests for M6 Steam library & game detection (VDF parse, scan, tool filter, cache diff)."""

import tempfile
import unittest
from pathlib import Path
from unittest import mock

from rigdoctor.core import steam

_GAME_ACF = """"AppState"
{{
\t"appid"\t\t"{appid}"
\t"name"\t\t"{name}"
\t"installdir"\t\t"{installdir}"
\t"SizeOnDisk"\t\t"{size}"
\t"LastUpdated"\t\t"{updated}"
}}
"""

_LIBRARYFOLDERS = """"libraryfolders"
{{
\t"0"
\t{{
\t\t"path"\t\t"{path}"
\t\t"label"\t\t"Main"
\t\t"apps"
\t\t{{
\t\t\t"570"\t\t"123"
\t\t}}
\t}}
}}
"""


def _make_library(root: Path, games) -> Path:
    """games: list of (appid, name, installdir, size, updated). Returns the library path."""
    steamapps = root / "steamapps"
    steamapps.mkdir(parents=True, exist_ok=True)
    for appid, name, installdir, size, updated in games:
        (steamapps / f"appmanifest_{appid}.acf").write_text(
            _GAME_ACF.format(appid=appid, name=name, installdir=installdir, size=size, updated=updated)
        )
    return root


class VdfTests(unittest.TestCase):
    def test_parse_nested_and_pairs(self):
        data = steam._parse_vdf(_GAME_ACF.format(
            appid="570", name="Dota 2", installdir="dota 2 beta", size="15", updated="1700"))
        state = data["AppState"]
        self.assertEqual(state["appid"], "570")
        self.assertEqual(state["name"], "Dota 2")
        self.assertEqual(state["installdir"], "dota 2 beta")

    def test_parse_handles_quotes_in_names(self):
        acf = _GAME_ACF.format(appid="1", name="Baldur\\'s Gate 3", installdir="bg3", size="1", updated="1")
        data = steam._parse_vdf(acf)
        self.assertIn("Baldur", data["AppState"]["name"])

    def test_parse_garbage_returns_empty(self):
        self.assertEqual(steam._parse_vdf("not vdf at all"), {})


class ToolFilterTests(unittest.TestCase):
    def test_known_tool_appid(self):
        self.assertTrue(steam.is_tool("228980", "Steamworks Common Redistributables"))

    def test_proton_name_prefix(self):
        self.assertTrue(steam.is_tool("9999999", "Proton 8.0"))
        self.assertTrue(steam.is_tool("9999998", "Steam Linux Runtime 3.0 (sniper)"))

    def test_real_game_is_not_a_tool(self):
        self.assertFalse(steam.is_tool("570", "Dota 2"))


class ScanTests(unittest.TestCase):
    def test_scan_library_filters_tools(self):
        with tempfile.TemporaryDirectory() as d:
            lib = _make_library(Path(d), [
                ("570", "Dota 2", "dota 2 beta", "15000000000", "1700000000"),
                ("228980", "Steamworks Common Redistributables", "Steamworks Shared", "0", "0"),
                ("1493710", "Proton Experimental", "Proton - Experimental", "0", "0"),
            ])
            games = steam.scan_library(str(lib))
            names = {g.name for g in games}
            self.assertEqual(names, {"Dota 2"})
            self.assertEqual(games[0].size_bytes, 15000000000)

    def test_scan_games_dedupes_and_sorts(self):
        with tempfile.TemporaryDirectory() as d1, tempfile.TemporaryDirectory() as d2:
            a = _make_library(Path(d1), [("10", "Zeta", "zeta", "1", "1"), ("20", "Alpha", "alpha", "1", "1")])
            b = _make_library(Path(d2), [("20", "Alpha", "alpha", "1", "1")])  # dup appid 20
            games = steam.scan_games([str(a), str(b)])
            self.assertEqual([g.name for g in games], ["Alpha", "Zeta"])  # sorted, deduped


class DiscoverTests(unittest.TestCase):
    def test_discover_reads_libraryfolders(self):
        with tempfile.TemporaryDirectory() as d:
            root = Path(d) / "Steam"
            (root / "steamapps").mkdir(parents=True)
            extra = Path(d) / "Extra"
            (extra / "steamapps").mkdir(parents=True)
            (root / "steamapps" / "libraryfolders.vdf").write_text(
                _LIBRARYFOLDERS.format(path=str(extra)))
            with mock.patch.object(steam, "steam_roots", return_value=[root]):
                libs = steam.discover_libraries()
            paths = {lib.path for lib in libs}
            self.assertIn(str(root.resolve()), paths)   # root itself
            self.assertIn(str(extra.resolve()), paths)  # the configured extra library


class CacheDiffTests(unittest.TestCase):
    def _rescan(self, lib, games_file, cfg):
        with mock.patch.object(steam, "GAMES_FILE", games_file):
            return steam.rescan(cfg=cfg)

    def test_first_scan_has_no_new_then_added_game_is_new(self):
        with tempfile.TemporaryDirectory() as d:
            lib = _make_library(Path(d) / "lib", [("10", "Alpha", "alpha", "1", "1")])
            games_file = Path(d) / "games.json"
            cfg = {"steam_libraries": [str(lib)]}

            first = self._rescan(lib, games_file, cfg)
            self.assertEqual(first.new_appids, [])  # first run flags nothing as new

            # Install a second game; it should be flagged new on the next scan.
            _make_library(lib, [("10", "Alpha", "alpha", "1", "1"), ("20", "Beta", "beta", "1", "1")])
            second = self._rescan(lib, games_file, cfg)
            self.assertEqual(second.new_appids, ["20"])
            self.assertEqual({g.name for g in second.games}, {"Alpha", "Beta"})

    def test_acknowledge_clears_new(self):
        with tempfile.TemporaryDirectory() as d:
            lib = _make_library(Path(d) / "lib", [("10", "Alpha", "alpha", "1", "1")])
            games_file = Path(d) / "games.json"
            cfg = {"steam_libraries": [str(lib)]}
            self._rescan(lib, games_file, cfg)
            _make_library(lib, [("10", "Alpha", "alpha", "1", "1"), ("20", "Beta", "beta", "1", "1")])
            self._rescan(lib, games_file, cfg)
            with mock.patch.object(steam, "GAMES_FILE", games_file):
                steam.acknowledge_new()
                self.assertEqual(steam.load_cache()["new_appids"], [])


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