(** Tests for the Sonority module *)

open Sorsyl

(** Test fixture - initialize the module once *)
let () =
  (* Initialize with the data directory *)
  (* When run with dune test, the working directory is _build/default/test *)
  let data_dir =
    if Sys.file_exists "./data" then "./data"
    else if Sys.file_exists "../data" then "../data"
    else if Sys.file_exists "../../../data" then "../../../data"
    else (
      Printf.eprintf "Current directory: %s\n" (Sys.getcwd ());
      failwith "Cannot find data directory")
  in
  Sonority.init data_dir

(** Test sonority value 9 - Low vowels *)
let test_sonority_nine () =
  let segments = [ "a"; "ɑ"; "æ"; "ɒ"; "e"; "o̥" ] in
  let expected = [ 9; 9; 9; 9; 9; 9 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_nine: PASSED\n"

(** Test sonority value 8 - High vowels *)
let test_sonority_eight () =
  let segments = [ "i"; "y"; "ɨ"; "ʉ"; "ɯ"; "u" ] in
  let expected = [ 8; 8; 8; 8; 8; 8 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_eight: PASSED\n"

(** Test sonority value 7 - Glides/approximants *)
let test_sonority_seven () =
  let segments = [ "j"; "w"; "ʋ"; "ɰ"; "ɹ"; "e̯" ] in
  let expected = [ 7; 7; 7; 7; 7; 7 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_seven: PASSED\n"

(** Test sonority value 6 - Liquids *)
let test_sonority_six () =
  let segments = [ "l"; "ɭ"; "r"; "ɾ" ] in
  let expected = [ 6; 6; 6; 6 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_six: PASSED\n"

(** Test sonority value 5 - Nasals *)
let test_sonority_five () =
  let segments = [ "n"; "m"; "ŋ"; "ɴ" ] in
  let expected = [ 5; 5; 5; 5 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_five: PASSED\n"

(** Test sonority value 4 - Voiced fricatives *)
let test_sonority_four () =
  let segments = [ "v"; "z"; "ʒ"; "ɣ" ] in
  let expected = [ 4; 4; 4; 4 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_four: PASSED\n"

(** Test sonority value 3 - Voiceless fricatives *)
let test_sonority_three () =
  let segments = [ "f"; "s"; "x"; "ħ"; "ʃ" ] in
  let expected = [ 3; 3; 3; 3; 3 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_three: PASSED\n"

(** Test sonority value 2 - Voiced stops *)
let test_sonority_two () =
  let segments = [ "b"; "ɡ"; "d"; "ɢ" ] in
  let expected = [ 2; 2; 2; 2 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_two: PASSED\n"

(** Test sonority value 1 - Voiceless stops *)
let test_sonority_one () =
  let segments = [ "p"; "k"; "c"; "q" ] in
  let expected = [ 1; 1; 1; 1 ] in
  let results = List.map Sonority.sonority segments in
  assert (results = expected);
  Printf.printf "test_sonority_one: PASSED\n"

(** Test unknown segment handling *)
let test_unknown_segment () =
  try
    let _ = Sonority.sonority "🦆" in
    assert false (* Should not reach here *)
  with
  | Failure msg when String.sub msg 0 20 = "Unknown IPA segment:" ->
      Printf.printf "test_unknown_segment: PASSED\n"
  | _ -> assert false

(** Test feature-based sonority calculation *)
let test_sonority_from_features () =
  (* Test a simple voiceless stop: -syl, +cons, -son, -cont, -voi *)
  let segment =
    [
      (Feature.Syllabic, Feature.Minus);
      (Feature.Consonantal, Feature.Plus);
      (Feature.Sonorant, Feature.Minus);
      (Feature.Continuant, Feature.Minus);
      (Feature.Voiced, Feature.Minus);
    ]
  in
  let result = Sonority.sonority_from_features segment in
  assert (result = 1);
  Printf.printf "test_sonority_from_features: PASSED\n"

(** Run all tests *)
let () =
  Printf.printf "Running Sonority module tests...\n";
  Printf.printf "================================\n";
  test_sonority_nine ();
  test_sonority_eight ();
  test_sonority_seven ();
  test_sonority_six ();
  test_sonority_five ();
  test_sonority_four ();
  test_sonority_three ();
  test_sonority_two ();
  test_sonority_one ();
  test_unknown_segment ();
  test_sonority_from_features ();
  Printf.printf "================================\n";
  Printf.printf "All tests passed!\n"