from src.command_palette import Command, ScoredCommand, fuzzy_match


def _cmd(id: str, title: str) -> Command:
 return Command(id=id, title=title, category="test")


def test_fuzzy_match_prefix_ranks_first():
 candidates = [
  _cmd("find", "Find in Selection"),
  _cmd("fold", "Fold All"),
  _cmd("config", "Configure Settings"),
 ]
 results = fuzzy_match("fin", candidates, top_n=10)
 assert len(results) > 0
 assert results[0].command.id == "find"
 assert results[0].score > 0.5


def test_fuzzy_match_subsequence_match():
 candidates = [_cmd("x", "Find")]
 results = fuzzy_match("fd", candidates, top_n=10)
 assert len(results) == 1
 assert results[0].command.id == "x"


def test_fuzzy_match_no_match_returns_empty():
 candidates = [_cmd("x", "foo bar")]
 results = fuzzy_match("xyz", candidates, top_n=10)
 assert results == []


def test_fuzzy_match_top_n_limits_results():
 candidates = [_cmd(f"cmd_{i}", f"Command {i}") for i in range(50)]
 results = fuzzy_match("cmd", candidates, top_n=10)
 assert len(results) == 10


def test_fuzzy_match_score_higher_for_exact_prefix():
 candidates = [
  _cmd("a", "find"),
  _cmd("b", "Configure Find Settings"),
 ]
 results = fuzzy_match("fin", candidates, top_n=10)
 assert results[0].command.id == "a"


def test_commands_registry_has_core_commands():
 from src.commands import registry
 all_ids = {c.id for c in registry.all()}
 assert "reset_session" in all_ids
 assert "clear_discussion" in all_ids
 assert "trigger_hot_reload" in all_ids
 assert "show_documentation" in all_ids