"""
Test that plain output preserves input exactly except for markup.
Output should equal: input.replace("^", "").replace("_", "")
"""

import pytest
import sys
import html
import re
from pathlib import Path

# Add parent directory to path to import app module
sys.path.insert(0, str(Path(__file__).parent.parent))

from app import (
    DEFAULT_MODEL_ID,
    DEFAULT_MODEL_LABEL,
    MODEL_OPTIONS,
    _resolve_model_id,
    _render_plain_line_per_word,
    _render_styled_line_per_word,
    macronize,
    macronize_ui,
    preprocess_and_syllabify,
)


def strip_markup(text: str) -> str:
    """Remove markup characters from text."""
    return text.replace("^", "").replace("_", "")


def strip_color(text: str) -> str:
    """Remove pretty-output color markup."""
    return html.unescape(re.sub(r"</?span[^>]*>", "", text))


# Test cases with Greek lines
TEST_CASES = [
    # Basic simple word
    "νεανίας",
    # Multiple words with spaces
    "νεανίας ἀάατός ἐστιν",
    # With final sigma
    "καὶ καλός",
    # Multiple spaces
    "καλὰ   μὲν",
    # Single letter
    "ἢ",
    # Word with punctuation preserved
    "τυφλὸς ἤ",
    # Multi-word with accents
    "Ἀτρεΐδαι τε καὶ ἄλλοι",
    # Longer passage
    "νεανίας ἀάατός ἐστιν καὶ καλός",
    # Expanded ξ and trailing comma must be restored exactly
    "καλὰ μὲν ἠέξευ, καλὰ δ᾽ ἔτραφες, οὐράνιε Ζεῦ",
]


@pytest.mark.parametrize("input_line", TEST_CASES)
def test_plain_output_preserves_input_without_markup(input_line):
    """
    Test that the plain output is identical to input after removing markup.
    
    The output should be: input.replace("^", "").replace("_", "")
    This ensures:
    - All original characters are preserved
    - Spaces are preserved exactly
    - Final sigmas are preserved
    - Only the markup (^ and _) are added
    """
    # Get the rendered plain line
    plain_output = _render_plain_line_per_word(input_line, DEFAULT_MODEL_ID)
    
    # Strip markup from the output to get back the base text
    output_without_markup = strip_markup(plain_output)
    
    # The expected result: input with no markup
    # (We don't normalize final sigma - we preserve exactly what was in the input)
    input_expected = input_line
    
    print(f"\nInput: {repr(input_line)}")
    print(f"Output: {repr(plain_output)}")
    print(f"Output without markup: {repr(output_without_markup)}")
    print(f"Expected: {repr(input_expected)}")
    
    # The core assertion: output without markup should match input
    assert output_without_markup == input_expected, (
        f"Output without markup doesn't match input.\n"
        f"Expected: {repr(input_expected)}\n"
        f"Got: {repr(output_without_markup)}"
    )


def test_styled_output_uses_plain_formatting_with_colored_vowels(monkeypatch):
    input_line = "νεανίας ἀάατός ἐστιν καὶ καλός. τὰ παῖδες τὰ καλά"
    labels_by_word = {
        "νεανίασ": [("νε", 0), ("α", 1), ("νί", 2), ("ασ", 0)],
        "ἀάατόσ": [("ἀ", 2), ("ά", 1), ("α", 2), ("τόσ", 0)],
        "ἐστιν": [("ἐσ", 0), ("τιν", 2)],
        "καὶ": [("καὶ", 0)],
        "καλόσ.": [("κα", 2), ("λό", 0), ("σ.", 0)],
        "τὰ": [("τὰ", 2)],
        "παῖδεσ": [("παῖ", 0), ("δεσ", 0)],
        "καλά": [("κα", 1), ("λά", 1)],
    }

    def fake_classify_line(word, model_id):
        return labels_by_word[word]

    monkeypatch.setattr("app.classify_line", fake_classify_line)

    styled_output = _render_styled_line_per_word(input_line, DEFAULT_MODEL_ID)

    expected = (
        'νε'
        '<span class="vowel long">α</span>'
        'ν<span class="vowel short">ί</span>'
        'ας '
        '<span class="vowel short">ἀ</span>'
        '<span class="vowel long">ά</span>'
        '<span class="vowel short">α</span>'
        'τός '
        'ἐστ<span class="vowel short">ι</span>ν '
        'καὶ '
        'κ<span class="vowel short">α</span>λός. '
        'τ<span class="vowel short">ὰ</span> '
        'παῖδες '
        'τ<span class="vowel short">ὰ</span> '
        'κ<span class="vowel long">α</span>λ<span class="vowel long">ά</span>'
    )

    assert styled_output == expected
    assert "vowel clear" not in styled_output


@pytest.mark.parametrize("input_line", TEST_CASES)
def test_styled_output_preserves_input_without_color(monkeypatch, input_line):
    def fake_classify_line(word, model_id):
        return [
            (syllable, 1 if idx % 2 == 0 else 2)
            for idx, syllable in enumerate(preprocess_and_syllabify(word))
        ]

    monkeypatch.setattr("app.classify_line", fake_classify_line)

    styled_output = _render_styled_line_per_word(input_line, DEFAULT_MODEL_ID)

    assert strip_color(styled_output) == input_line


def test_plain_output_box_contains_only_output_lines(monkeypatch):
    monkeypatch.setattr("app._render_plain_line_per_word", lambda line, model_id: f"marked {line}")
    monkeypatch.setattr("app._render_styled_line_per_word", lambda line, model_id: line)

    html_output, plain_output = macronize_ui("alpha\nbeta", DEFAULT_MODEL_LABEL)

    assert plain_output == "marked alpha\nmarked beta"
    assert '<div class="source">' not in html_output
    assert '<div class="line-output">alpha</div>' in html_output


def test_api_returns_only_plain_output(monkeypatch):
    monkeypatch.setattr("app._render_plain_line_per_word", lambda line, model_id: f"marked {line}")

    assert macronize("alpha\nbeta") == "marked alpha\nmarked beta"


@pytest.mark.parametrize(
    ("model_label", "expected_model_id"),
    [
        ("modernbert", MODEL_OPTIONS["Pretrained ModernBERT"]),
        ("syllamobert", MODEL_OPTIONS["Pretrained ModernBERT"]),
        ("roberta", MODEL_OPTIONS["Fine-tuned RoBERTa"]),
        ("Pretrained ModernBERT", MODEL_OPTIONS["Pretrained ModernBERT"]),
        ("Fine-tuned RoBERTa", MODEL_OPTIONS["Fine-tuned RoBERTa"]),
    ],
)
def test_model_label_aliases(model_label, expected_model_id):
    assert _resolve_model_id(model_label) == expected_model_id


def test_api_model_label_alias_is_used(monkeypatch):
    model_ids = []

    def fake_render_line(line, model_id):
        model_ids.append(model_id)
        return f"marked {line}"

    monkeypatch.setattr("app._render_plain_line_per_word", fake_render_line)

    assert macronize("alpha", model="roberta") == "marked alpha"
    assert model_ids == [MODEL_OPTIONS["Fine-tuned RoBERTa"]]


def test_public_api_endpoint_is_plain_output_only():
    import app

    public_deps = [
        dep
        for dep in app.demo.config.get("dependencies", [])
        if dep.get("api_name") == "macronize"
        and dep.get("api_visibility") == "public"
    ]

    assert len(public_deps) == 1
    assert len(public_deps[0].get("inputs", [])) == 2
    assert len(public_deps[0].get("outputs", [])) == 1

    public_callable_deps = [
        dep
        for dep in app.demo.config.get("dependencies", [])
        if dep.get("api_visibility") == "public"
        and dep.get("api_name") not in (None, False)
    ]
    assert [dep.get("api_name") for dep in public_callable_deps] == ["macronize"]


def test_mcp_tool_surface_exposes_only_plain_endpoint():
    import app

    assert set(app.demo.get_api_info()["named_endpoints"]) == {"/macronize"}


def test_public_api_text_example_is_greek():
    import app

    api_text_components = [
        component
        for component in app.demo.config.get("components", [])
        if component.get("props", {}).get("label") == "text"
    ]

    assert len(api_text_components) == 1
    assert api_text_components[0]["props"]["value"] == "μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος"


def test_try_examples_preserve_visible_line_breaks():
    import app

    assert any("\n" in example for example in app.examples)
    assert "#try-examples .examples" in app.CSS
    assert "#try-examples .example-text" in app.CSS
    assert "white-space: pre-wrap" in app.CSS
    assert "overflow: visible" in app.CSS
    assert "text-overflow: clip" in app.CSS


def test_python_api_instructions_omit_api_name():
    import app

    markdown_values = [
        component.get("props", {}).get("value", "")
        for component in app.demo.config.get("components", [])
        if component.get("type") == "markdown"
    ]
    api_markdown = next(value for value in markdown_values if "Python API" in value)

    assert 'Client("Urdatorn/macronizer")' in api_markdown
    assert 'model="roberta"' in api_markdown
    assert 'api_name="/macronize"' in api_markdown


if __name__ == "__main__":
    pytest.main([__file__, "-v", "-s"])