rumdl 0.1.78

use rumdl_lib::lint_context::LintContext;
use rumdl_lib::rule::Rule;
use rumdl_lib::rules::{MD004UnorderedListStyle, md004_unordered_list_style::UnorderedListStyle};

#[test]
fn test_check_consistent_valid() {
    let content = "* Item 1\n* Item 2\n  * Nested item";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert!(warnings.is_empty());
}

#[test]
fn test_check_consistent_invalid() {
    let content = "* Item 1\n- Item 2\n  + Nested item";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2);
}

#[test]
fn test_check_specific_style_valid() {
    let content = "- Item 1\n- Item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    assert!(warnings.is_empty());
}

#[test]
fn test_check_specific_style_invalid() {
    let content = "* Item 1\n- Item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 1);
}

#[test]
fn test_fix_consistent_tie_prefers_dash() {
    // All markers appear once - tie should prefer dash
    let content = "* Item 1\n- Item 2\n+ Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "- Item 1\n- Item 2\n- Item 3");
}

#[test]
fn test_fix_specific_style() {
    let content = "* Item 1\n- Item 2\n+ Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "* Item 1\n* Item 2\n* Item 3");
}

#[test]
fn test_fix_with_indentation() {
    let content = "  * Item 1\n    - Item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "  * Item 1\n    * Item 2");
}

#[test]
fn test_check_skip_code_blocks() {
    let content = "```\n* Item 1\n- Item 2\n```\n* Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert!(warnings.is_empty());
}

#[test]
fn test_check_skip_front_matter() {
    let content = "---\ntitle: Test\n---\n* Item 1\n- Item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 1);
}

#[test]
fn test_fix_skip_code_blocks() {
    let content = "```\n* Item 1\n- Item 2\n```\n* Item 3\n- Item 4";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "```\n* Item 1\n- Item 2\n```\n* Item 3\n* Item 4");
}

#[test]
fn test_fix_skip_front_matter() {
    let content = "---\ntitle: Test\n---\n* Item 1\n- Item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "---\ntitle: Test\n---\n* Item 1\n* Item 2");
}

#[test]
fn test_check_mixed_indentation() {
    let content = "* Item 1\n  - Sub Item 1\n* Item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();

    // Flags the dash marker that doesn't match the first marker (asterisk)
    assert_eq!(warnings.len(), 1);
}

#[test]
fn test_check_consistent_tie_all_markers() {
    // All markers appear once - tie should prefer dash
    let content = "+ Item 1\n* Item 2\n- Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // Plus and asterisk are flagged
}

#[test]
fn test_check_consistent_dash_most_prevalent() {
    // Dash is most prevalent (2 vs 1 each for others)
    let content = "- Item 1\n* Item 2\n- Item 3\n+ Item 4";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // Asterisk and plus are flagged
}

#[test]
fn test_fix_consistent_tie_all_markers() {
    // All markers appear once - tie should prefer dash
    let content = "+ Item 1\n* Item 2\n- Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "- Item 1\n- Item 2\n- Item 3");
}

#[test]
fn test_fix_consistent_dash_most_prevalent() {
    // Dash is most prevalent
    let content = "- Item 1\n* Item 2\n- Item 3\n+ Item 4";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "- Item 1\n- Item 2\n- Item 3\n- Item 4");
}

#[test]
fn test_empty_content() {
    let content = "";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert!(warnings.is_empty());
}

#[test]
fn test_no_list_items() {
    let content = "# Heading\nSome text";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert!(warnings.is_empty());
}

#[test]
fn test_md004_asterisk_style() {
    let ctx = LintContext::new(
        "- Item 1\n+ Item 2\n  - Nested 1\n  + Nested 2\n* Item 3",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 4); // All non-asterisk markers are flagged
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "* Item 1\n* Item 2\n  * Nested 1\n  * Nested 2\n* Item 3");
}

#[test]
fn test_md004_plus_style() {
    let ctx = LintContext::new(
        "- Item 1\n* Item 2\n  - Nested 1\n  * Nested 2\n+ Item 3",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Plus);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 4); // All non-plus markers are flagged
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "+ Item 1\n+ Item 2\n  + Nested 1\n  + Nested 2\n+ Item 3");
}

#[test]
fn test_md004_dash_style() {
    let ctx = LintContext::new(
        "* Item 1\n+ Item 2\n  * Nested 1\n  + Nested 2\n- Item 3",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 4); // All non-dash markers are flagged
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "- Item 1\n- Item 2\n  - Nested 1\n  - Nested 2\n- Item 3");
}

#[test]
fn test_md004_deeply_nested() {
    let ctx = LintContext::new(
        "* Level 1\n  + Level 2\n    - Level 3\n      + Level 4\n  * Back to 2\n* Level 1\n",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    // Flags mixed markers (+ and - don't match the first marker *)
    assert_eq!(result.len(), 3); // + on line 2, - on line 3, + on line 4
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "* Level 1\n  * Level 2\n    * Level 3\n      * Level 4\n  * Back to 2\n* Level 1\n"
    );
}

#[test]
fn test_md004_mixed_content() {
    let ctx = LintContext::new(
        "# Heading\n\n* Item 1\n  Some text\n  + Nested with text\n    More text\n* Item 2\n",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    // Flags the + marker that doesn't match the first marker *
    assert_eq!(result.len(), 1);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "# Heading\n\n* Item 1\n  Some text\n  * Nested with text\n    More text\n* Item 2\n"
    );
}

#[test]
fn test_md004_empty_content() {
    let ctx = LintContext::new("", rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    assert!(result.is_empty());
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "");
}

#[test]
fn test_md004_no_lists() {
    let ctx = LintContext::new(
        "# Heading\n\nSome text\nMore text",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "# Heading\n\nSome text\nMore text");
}

#[test]
fn test_md004_code_blocks() {
    let ctx = LintContext::new(
        "* Item 1\n```\n* Not a list\n+ Also not a list\n```\n* Item 2\n",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    assert!(result.is_empty());
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "* Item 1\n```\n* Not a list\n+ Also not a list\n```\n* Item 2\n");
}

#[test]
fn test_md004_blockquotes() {
    let ctx = LintContext::new(
        "* Item 1\n> * Quoted item\n> + Another quoted item\n* Item 2\n",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 1); // Should flag the + marker that doesn't match asterisk style
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "* Item 1\n> * Quoted item\n> * Another quoted item\n* Item 2\n");
}

#[test]
fn test_md004_list_continuations() {
    let ctx = LintContext::new(
        "* Item 1\n  Continuation 1\n  + Nested item\n    Continuation 2\n* Item 2\n",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    // Flags the + marker that doesn't match the first marker *
    assert_eq!(result.len(), 1);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "* Item 1\n  Continuation 1\n  * Nested item\n    Continuation 2\n* Item 2\n"
    );
}

#[test]
fn test_md004_mixed_ordered_unordered() {
    let ctx = LintContext::new(
        "1. Ordered item\n   * Unordered sub-item\n   + Another sub-item\n2. Ordered item\n",
        rumdl_lib::config::MarkdownFlavor::Standard,
        None,
    );
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 1);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "1. Ordered item\n   * Unordered sub-item\n   * Another sub-item\n2. Ordered item\n"
    );
}

#[test]
fn test_complex_list_patterns() {
    let content = "* Level 1 item 1\n  * Level 2 item 1\n    * Level 3 item 1\n  * Level 2 item 2\n* Level 1 item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "* Level 1 item 1\n  * Level 2 item 1\n    * Level 3 item 1\n  * Level 2 item 2\n* Level 1 item 2"
    );
}

#[test]
fn test_lists_in_code_blocks() {
    // Test lists inside code blocks (should be ignored)
    let content =
        "* Valid list item\n\n```\n* This is in a code block\n- Also in code block\n```\n\n* Another valid item";

    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 0); // No warnings, code blocks ignored

    // Ensure fenced code blocks with language specifiers work too
    let content = "* Valid list item\n\n```markdown\n* This is in a code block\n- Also in code block\n```\n\n* Another valid item";

    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 0);
}

#[test]
fn test_nested_list_complexity() {
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    // * appears 2 times, - appears 2 times, + appears 1 time
    // Tie between * and - should prefer dash
    let content = "* Item 1\n  - Item 2\n    + Item 3\n  - Item 5\n* Item 6\n";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let result = rule.check(&ctx).unwrap();
    // Dash wins due to tie-breaker, so asterisks and plus are flagged
    assert_eq!(result.len(), 3); // * on line 1, + on line 3, * on line 5
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "- Item 1\n  - Item 2\n    - Item 3\n  - Item 5\n- Item 6\n");
}

#[test]
fn test_indentation_handling() {
    // Test different indentation styles
    let content = "* Level 1\n    * Indented with 4 spaces\n  * Indented with 2 spaces";

    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 0); // Should handle different indentation levels

    // Non-list content with asterisks
    let content = "* Actual list item\nText with * asterisk that's not a list\n  * Indented list item";

    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let result = rule.check(&ctx).unwrap();
    assert_eq!(result.len(), 0); // Asterisk in middle of line isn't a list marker
}

#[test]
fn test_fix_list_markers() {
    let content = "* First item\n* Second item\n* Third item";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "* First item\n* Second item\n* Third item");
}

#[test]
fn test_performance_md004() {
    // Generate a large document with nested lists
    let mut content = String::with_capacity(20_000);

    for i in 0..50 {
        // Add a top-level list item
        let marker = match i % 3 {
            0 => "*",
            1 => "-",
            _ => "+",
        };

        content.push_str(&format!("{marker} Top level item {i}\n"));

        // Add 3 second-level items
        for j in 0..3 {
            let marker = match (i + j) % 3 {
                0 => "*",
                1 => "-",
                _ => "+",
            };

            content.push_str(&format!("  {marker} Second level item {i}.{j}\n"));

            // Add 2 third-level items
            for k in 0..2 {
                let marker = match (i + j + k) % 3 {
                    0 => "*",
                    1 => "-",
                    _ => "+",
                };

                content.push_str(&format!("    {marker} Third level item {i}.{j}.{k}\n"));
            }
        }

        content.push('\n'); // Add spacing between top-level items
    }

    // Measure performance
    let start = std::time::Instant::now();
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let ctx = LintContext::new(&content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let _result = rule.check(&ctx).unwrap();
    let _check_duration = start.elapsed();

    let start = std::time::Instant::now();
    let fixed_ctx = LintContext::new(&content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let _ = rule.fix(&fixed_ctx).unwrap();
    let _fix_duration = start.elapsed();

    // In consistent mode, contiguous runs with the same marker are not flagged, so result may be empty
    // Allow for warnings if present (do not assert result.is_empty())
}

#[test]
fn test_configuration_asterisk_style() {
    // Test configuration with asterisk style
    let content = "- Item 1\n+ Item 2\n* Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // - and + don't match asterisk
    assert_eq!(warnings[0].message, "List marker '-' does not match expected style '*'");
    assert_eq!(warnings[1].message, "List marker '+' does not match expected style '*'");
}

#[test]
fn test_configuration_dash_style() {
    // Test configuration with dash style
    let content = "* Item 1\n+ Item 2\n- Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // * and + don't match dash
    assert_eq!(warnings[0].message, "List marker '*' does not match expected style '-'");
    assert_eq!(warnings[1].message, "List marker '+' does not match expected style '-'");
}

#[test]
fn test_configuration_plus_style() {
    // Test configuration with plus style
    let content = "* Item 1\n- Item 2\n+ Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Plus);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // * and - don't match plus
    assert_eq!(warnings[0].message, "List marker '*' does not match expected style '+'");
    assert_eq!(warnings[1].message, "List marker '-' does not match expected style '+'");
}

#[test]
fn test_configuration_consistent_style() {
    // Test configuration with consistent style
    let content = "* Item 1\n- Item 2\n* Item 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 1); // - doesn't match first marker *
    assert_eq!(warnings[0].message, "List marker '-' does not match expected style '*'");
}

#[test]
fn test_sublist_style_matching() {
    // Test that sublists must match the configured style
    let content = "* Parent 1\n  - Child 1\n  + Child 2\n* Parent 2\n  * Child 3";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // - and + in sublists don't match asterisk

    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(fixed, "* Parent 1\n  * Child 1\n  * Child 2\n* Parent 2\n  * Child 3");
}

#[test]
fn test_deeply_nested_sublist_style_matching() {
    // Test deeply nested sublists style matching
    let content = "* Level 1\n  * Level 2\n    - Level 3\n      + Level 4\n        * Level 5";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // - at level 3 and + at level 4 don't match

    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "* Level 1\n  * Level 2\n    * Level 3\n      * Level 4\n        * Level 5"
    );
}

#[test]
fn test_lists_after_paragraphs() {
    // Test lists that appear after other content
    // * appears 2 times, - appears 1 time, + appears 1 time → asterisk wins
    let content = "This is a paragraph.\n\n* Item 1\n- Item 2\n\nAnother paragraph.\n\n+ Item 3\n* Item 4";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // - and + don't match most prevalent marker *
}

#[test]
fn test_lists_after_headings() {
    // Test lists that appear after headings
    // - appears 2 times, * appears 1 time, + appears 1 time → dash wins
    let content = "# Heading 1\n\n- Item 1\n- Item 2\n\n## Heading 2\n\n* Item 3\n+ Item 4";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // * and + don't match most prevalent marker -
}

#[test]
fn test_fix_preserves_list_content() {
    // Test that fix preserves the content after list markers
    let content = "* Item with **bold** text\n- Item with `code` text\n+ Item with [link](url)";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "- Item with **bold** text\n- Item with `code` text\n- Item with [link](url)"
    );
}

#[test]
fn test_multiple_lists_in_blockquotes() {
    // Test multiple lists inside blockquotes
    // * appears 2 times, - appears 1 time, + appears 1 time → asterisk wins
    let content = "> * Quoted item 1\n> - Quoted item 2\n>\n> + New list item 1\n> * New list item 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
    let warnings = rule.check(&ctx).unwrap();
    assert_eq!(warnings.len(), 2); // - and + don't match most prevalent marker *

    let fixed = rule.fix(&ctx).unwrap();
    assert_eq!(
        fixed,
        "> * Quoted item 1\n> * Quoted item 2\n>\n> * New list item 1\n> * New list item 2"
    );
}

#[test]
fn test_nested_blockquotes_with_lists() {
    // Test nested blockquotes with lists - should detect inconsistent markers
    let content = "> * Level 1 quote\n> > - Level 2 quote\n> > + Another level 2";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let warnings = rule.check(&ctx).unwrap();
    // Should flag the '-' and '+' markers in nested blockquotes
    assert_eq!(warnings.len(), 2, "Expected 2 warnings, got: {warnings:?}");
    // Messages contain the marker symbols
    assert!(
        warnings[0].message.contains("'-'"),
        "Expected dash marker in message, got: {}",
        warnings[0].message
    );
    assert!(
        warnings[1].message.contains("'+'"),
        "Expected plus marker in message, got: {}",
        warnings[1].message
    );
}

#[test]
fn test_fix_method_comprehensive() {
    // Comprehensive test of fix method with various scenarios
    let content = "# Header\n\n* Item 1\n  - Subitem 1.1\n  + Subitem 1.2\n\n> - Quoted item\n> * Another quoted\n\n```\n* Code block item (should not change)\n- Another code item\n```\n\n* Item 2\n  * Subitem 2.1";

    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let fixed = rule.fix(&ctx).unwrap();

    let expected = "# Header\n\n* Item 1\n  * Subitem 1.1\n  * Subitem 1.2\n\n> * Quoted item\n> * Another quoted\n\n```\n* Code block item (should not change)\n- Another code item\n```\n\n* Item 2\n  * Subitem 2.1";

    assert_eq!(fixed, expected);
}

#[test]
fn test_check_method_comprehensive() {
    // Comprehensive test of check method with various scenarios
    let content = "* Valid item\n- Invalid item\n  + Invalid nested\n  * Valid nested\n\n> - Invalid quoted\n\n```\n- Ignored in code\n```";

    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let warnings = rule.check(&ctx).unwrap();

    // Should have 3 warnings: line 2 (-), line 3 (+), and quoted line (-)
    assert_eq!(warnings.len(), 3);

    // Verify warning details
    assert_eq!(warnings[0].line, 2);
    assert_eq!(warnings[0].message, "List marker '-' does not match expected style '*'");

    assert_eq!(warnings[1].line, 3);
    assert_eq!(warnings[1].message, "List marker '+' does not match expected style '*'");

    assert_eq!(warnings[2].line, 6);
    assert_eq!(warnings[2].message, "List marker '-' does not match expected style '*'");
}

mod roundtrip_safety {
    use super::*;

    /// Helper: fix then re-check must yield zero warnings
    fn assert_roundtrip(rule: &MD004UnorderedListStyle, content: &str) {
        let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let fixed = rule.fix(&ctx).unwrap();
        let ctx2 = LintContext::new(&fixed, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let warnings = rule.check(&ctx2).unwrap();
        assert!(
            warnings.is_empty(),
            "Roundtrip failed: after fix, re-check found {} warnings on content:\n---\n{}\n---\nwarnings: {:?}",
            warnings.len(),
            fixed,
            warnings,
        );
    }

    #[test]
    fn roundtrip_consistent_mixed() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
        assert_roundtrip(&rule, "* Item 1\n- Item 2\n+ Item 3");
    }

    #[test]
    fn roundtrip_consistent_nested() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
        assert_roundtrip(
            &rule,
            "* Item 1\n  - Nested 1\n    + Double nested\n  - Nested 2\n* Item 2",
        );
    }

    #[test]
    fn roundtrip_asterisk() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        assert_roundtrip(&rule, "- Item 1\n+ Item 2\n* Item 3");
    }

    #[test]
    fn roundtrip_dash() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
        assert_roundtrip(&rule, "* Item 1\n+ Item 2\n- Item 3");
    }

    #[test]
    fn roundtrip_plus() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Plus);
        assert_roundtrip(&rule, "* Item 1\n- Item 2\n+ Item 3");
    }

    #[test]
    fn roundtrip_sublist() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Sublist);
        assert_roundtrip(&rule, "- Item 1\n  - Item 2\n    - Item 3\n      - Item 4");
    }

    #[test]
    fn roundtrip_with_trailing_newline() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        assert_roundtrip(&rule, "- Item 1\n+ Item 2\n* Item 3\n");
    }

    #[test]
    fn roundtrip_code_blocks() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        assert_roundtrip(&rule, "- Item 1\n\n```\n* code\n- code\n```\n\n+ Item 2\n");
    }

    #[test]
    fn roundtrip_blockquotes() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        assert_roundtrip(&rule, "- Item 1\n> + Quoted\n> - Another\n* Item 2\n");
    }

    #[test]
    fn roundtrip_front_matter() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
        assert_roundtrip(&rule, "---\ntitle: Test\n---\n* Item 1\n+ Item 2\n");
    }

    #[test]
    fn roundtrip_deeply_nested() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Consistent);
        assert_roundtrip(
            &rule,
            "* Level 1\n  + Level 2\n    - Level 3\n      + Level 4\n  * Back to 2\n* Level 1\n",
        );
    }

    #[test]
    fn roundtrip_mixed_ordered_unordered() {
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        assert_roundtrip(&rule, "1. Ordered\n   - Unordered\n   + Another\n2. Ordered\n");
    }
}

mod parity_with_markdownlint {
    use super::*;

    #[test]
    fn parity_mixed_markers_no_trailing_newline() {
        let input = "* Item 1\n- Item 2\n+ Item 3";
        let expected = "* Item 1\n* Item 2\n* Item 3";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_mixed_markers_with_trailing_newline() {
        let input = "* Item 1\n- Item 2\n+ Item 3\n";
        let expected = "* Item 1\n* Item 2\n* Item 3\n";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_nested_lists() {
        let input = "* Level 1\n  - Level 2\n    + Level 3\n  - Level 2b\n* Level 1b";
        let expected = "* Level 1\n  * Level 2\n    * Level 3\n  * Level 2b\n* Level 1b";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_code_blocks_and_front_matter() {
        let input = "---\ntitle: Test\n---\n* Item 1\n- Item 2\n```\n* Not a list\n- Not a list\n```\n* Item 3\n";
        let expected = "---\ntitle: Test\n---\n* Item 1\n* Item 2\n```\n* Not a list\n- Not a list\n```\n* Item 3\n";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_empty_input() {
        let input = "";
        let expected = "";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_no_lists() {
        let input = "# Heading\nSome text";
        let expected = "# Heading\nSome text";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_single_style_list() {
        let input = "- Item 1\n- Item 2\n- Item 3";
        let expected = "- Item 1\n- Item 2\n- Item 3";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_list_with_blank_lines() {
        let input = "* Item 1\n\n- Item 2\n\n+ Item 3";
        let expected = "* Item 1\n\n* Item 2\n\n* Item 3";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_blockquote_with_lists() {
        let input = "* Item 1\n> * Quoted item\n> + Another quoted item\n* Item 2";
        let expected = "* Item 1\n> * Quoted item\n> * Another quoted item\n* Item 2";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_single_item_list() {
        let input = "* Only item";
        let expected = "* Only item";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_list_with_tabs_for_indentation() {
        let input = "* Item 1\n\t- Nested with tab\n\t\t+ Double tab nested";
        let expected = "* Item 1\n\t* Nested with tab\n\t\t* Double tab nested";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);
        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }

    #[test]
    fn parity_list_with_extra_whitespace_after_marker() {
        // Note: Per CommonMark spec, 4+ spaces after a list marker creates a code block
        // within the list item. This is correct pulldown-cmark behavior.
        // Using 2-3 spaces to avoid triggering code block detection.
        let input = "*  Item 1\n-   Item 2\n+  Item 3";
        let expected = "*  Item 1\n*   Item 2\n*  Item 3";
        let ctx = LintContext::new(input, rumdl_lib::config::MarkdownFlavor::Standard, None);

        let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
        let fixed = rule.fix(&ctx).unwrap();
        assert_eq!(fixed, expected);
    }
}

#[test]
fn test_math_block_minus_not_flagged() {
    // Lines starting with - inside $$ ... $$ math blocks are math operators,
    // not list markers, and must not trigger MD004.
    let content = "# Example math\n\n$$\n- \\operatorname{Re} \\frac{L'(s, \\chi)}{L(s, \\chi)}\n$$\n";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    assert!(
        warnings.is_empty(),
        "MD004 should not flag lines starting with - inside math blocks: {warnings:?}"
    );
}

#[test]
fn test_math_block_plus_not_flagged() {
    // Lines starting with + inside $$ ... $$ math blocks are math operators,
    // not list markers, and must not trigger MD004.
    let content = "# Example math\n\n$$\n+ \\frac{1}{2} \\log\\frac{q}{\\pi}\n$$\n";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    assert!(
        warnings.is_empty(),
        "MD004 should not flag lines starting with + inside math blocks: {warnings:?}"
    );
}

#[test]
fn test_math_block_multiline_not_flagged() {
    // Multi-line math expression with - and + operators should not trigger MD004.
    let content = "\
# Example math

$$
- \\operatorname{Re} \\frac{L'(s, \\chi)}{L(s, \\chi)}
  + \\frac{1}{2} \\log\\frac{q}{\\pi}
$$
";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    assert!(
        warnings.is_empty(),
        "MD004 should not flag multi-line math expressions: {warnings:?}"
    );
}

#[test]
fn test_real_list_adjacent_to_math_block_still_checked() {
    // A real unordered list adjacent to a math block should still be checked by MD004.
    let content = "\
* Item 1
* Item 2

$$
- \\operatorname{Re}
$$

- Item 3
";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Dash);
    let warnings = rule.check(&ctx).unwrap();
    // * Item 1 and * Item 2 use asterisk but rule requires dash — should warn
    assert_eq!(
        warnings.len(),
        2,
        "MD004 should still flag real list items outside math blocks: {warnings:?}"
    );
}

#[test]
fn test_math_block_inside_blockquote_not_flagged() {
    // Lines starting with - inside a blockquote math block must not trigger MD004.
    let rule = MD004UnorderedListStyle::new(UnorderedListStyle::Asterisk);
    let content = "\
> $$
> - \\operatorname{Re} \\frac{L'(s, \\chi)}{L(s, \\chi)}
>   + \\frac{1}{2}
> $$
";
    let ctx = LintContext::new(content, rumdl_lib::config::MarkdownFlavor::Standard, None);
    let warnings = rule.check(&ctx).unwrap();
    assert!(
        warnings.is_empty(),
        "MD004 should not flag math operators inside blockquote math blocks: {warnings:?}"
    );
}