from app.services.glm_postprocess import (
    GLMResultFormatter,
    clean_formula_number,
    clean_repeated_content,
    find_consecutive_repeat,
)


def test_find_consecutive_repeat_truncates_when_threshold_met():
    repeated = "abcdefghij" * 10 + "tail"

    assert find_consecutive_repeat(repeated) == "abcdefghij"


def test_find_consecutive_repeat_returns_none_when_below_threshold():
    assert find_consecutive_repeat("abcdefghij" * 9) is None


def test_clean_repeated_content_handles_consecutive_and_line_level_repeats():
    assert clean_repeated_content("abcdefghij" * 10 + "tail") == "abcdefghij"

    line_repeated = "\n".join(["same line"] * 10 + ["other"])
    assert clean_repeated_content(line_repeated, line_threshold=10) == "same line\n"

    assert clean_repeated_content("normal text") == "normal text"


def test_clean_formula_number_strips_wrapping_parentheses():
    assert clean_formula_number("(1)") == "1"
    assert clean_formula_number("（2.1）") == "2.1"
    assert clean_formula_number("3") == "3"


def test_clean_content_removes_literal_tabs_and_long_repeat_noise():
    formatter = GLMResultFormatter()
    noisy = r"\t\t" + ("·" * 5) + ("abcdefghij" * 205) + r"\t"

    cleaned = formatter._clean_content(noisy)

    assert cleaned.startswith("···")
    assert cleaned.endswith("abcdefghij")
    assert r"\t" not in cleaned


def test_format_content_handles_titles_formula_text_and_newlines():
    formatter = GLMResultFormatter()

    assert formatter._format_content("Intro", "text", "doc_title") == "# Intro"
    assert formatter._format_content("- Section", "text", "paragraph_title") == "## Section"
    assert formatter._format_content(r"\[x+y\]", "formula", "display_formula") == "$$\nx+y\n$$"
    assert formatter._format_content("· item\nnext", "text", "text") == "- item\n\nnext"


def test_merge_formula_numbers_merges_before_and_after_formula():
    formatter = GLMResultFormatter()

    before = formatter._merge_formula_numbers(
        [
            {"index": 0, "label": "text", "native_label": "formula_number", "content": "(1)"},
            {"index": 1, "label": "formula", "native_label": "display_formula", "content": "$$\nx+y\n$$"},
        ]
    )
    after = formatter._merge_formula_numbers(
        [
            {"index": 0, "label": "formula", "native_label": "display_formula", "content": "$$\nx+y\n$$"},
            {"index": 1, "label": "text", "native_label": "formula_number", "content": "(2)"},
        ]
    )
    untouched = formatter._merge_formula_numbers(
        [{"index": 0, "label": "text", "native_label": "formula_number", "content": "(3)"}]
    )

    assert before == [
        {
            "index": 0,
            "label": "formula",
            "native_label": "display_formula",
            "content": "$$\nx+y \\tag{1}\n$$",
        }
    ]
    assert after == [
        {
            "index": 0,
            "label": "formula",
            "native_label": "display_formula",
            "content": "$$\nx+y \\tag{2}\n$$",
        }
    ]
    assert untouched == []


def test_merge_text_blocks_joins_hyphenated_words_when_wordfreq_accepts(monkeypatch):
    formatter = GLMResultFormatter()

    monkeypatch.setattr("app.services.glm_postprocess._WORDFREQ_AVAILABLE", True)
    monkeypatch.setattr("app.services.glm_postprocess.zipf_frequency", lambda word, lang: 3.0)

    merged = formatter._merge_text_blocks(
        [
            {"index": 0, "label": "text", "native_label": "text", "content": "inter-"},
            {"index": 1, "label": "text", "native_label": "text", "content": "national"},
        ]
    )

    assert merged == [
        {"index": 0, "label": "text", "native_label": "text", "content": "international"}
    ]


def test_merge_text_blocks_skips_invalid_merge(monkeypatch):
    formatter = GLMResultFormatter()

    monkeypatch.setattr("app.services.glm_postprocess._WORDFREQ_AVAILABLE", True)
    monkeypatch.setattr("app.services.glm_postprocess.zipf_frequency", lambda word, lang: 1.0)

    merged = formatter._merge_text_blocks(
        [
            {"index": 0, "label": "text", "native_label": "text", "content": "inter-"},
            {"index": 1, "label": "text", "native_label": "text", "content": "National"},
        ]
    )

    assert merged == [
        {"index": 0, "label": "text", "native_label": "text", "content": "inter-"},
        {"index": 1, "label": "text", "native_label": "text", "content": "National"},
    ]


def test_format_bullet_points_infers_missing_middle_bullet():
    formatter = GLMResultFormatter()
    items = [
        {"native_label": "text", "content": "- first", "bbox_2d": [10, 0, 50, 10]},
        {"native_label": "text", "content": "second", "bbox_2d": [12, 12, 52, 22]},
        {"native_label": "text", "content": "- third", "bbox_2d": [11, 24, 51, 34]},
    ]

    formatted = formatter._format_bullet_points(items)

    assert formatted[1]["content"] == "- second"


def test_format_bullet_points_skips_when_bbox_missing():
    formatter = GLMResultFormatter()
    items = [
        {"native_label": "text", "content": "- first", "bbox_2d": [10, 0, 50, 10]},
        {"native_label": "text", "content": "second", "bbox_2d": []},
        {"native_label": "text", "content": "- third", "bbox_2d": [11, 24, 51, 34]},
    ]

    formatted = formatter._format_bullet_points(items)

    assert formatted[1]["content"] == "second"


def test_process_runs_full_pipeline_and_skips_empty_content():
    formatter = GLMResultFormatter()
    regions = [
        {
            "index": 0,
            "label": "text",
            "native_label": "doc_title",
            "content": "Doc Title",
            "bbox_2d": [0, 0, 100, 30],
        },
        {
            "index": 1,
            "label": "text",
            "native_label": "formula_number",
            "content": "(1)",
            "bbox_2d": [80, 50, 100, 60],
        },
        {
            "index": 2,
            "label": "formula",
            "native_label": "display_formula",
            "content": "x+y",
            "bbox_2d": [0, 40, 100, 80],
        },
        {
            "index": 3,
            "label": "figure",
            "native_label": "image",
            "content": "figure placeholder",
            "bbox_2d": [0, 80, 100, 120],
        },
        {
            "index": 4,
            "label": "text",
            "native_label": "text",
            "content": "",
            "bbox_2d": [0, 120, 100, 150],
        },
    ]

    output = formatter.process(regions)

    assert "# Doc Title" in output
    assert "$$\nx+y \\tag{1}\n$$" in output
    assert "![](bbox=[0, 80, 100, 120])" in output