#!/usr/bin/env python3
"""
Test suite for doc_scraper core features
Tests URL validation, language detection, pattern extraction, and categorization
"""

import os
import sys
import unittest

from bs4 import BeautifulSoup

# Add parent directory to path
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from skill_seekers.cli.doc_scraper import DocToSkillConverter


class TestURLValidation(unittest.TestCase):
    """Test URL validation logic"""

    def setUp(self):
        """Set up test converter"""
        self.config = {
            "name": "test",
            "base_url": "https://docs.example.com/",
            "url_patterns": {"include": ["/guide/", "/api/"], "exclude": ["/blog/", "/about/"]},
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre code"},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        self.converter = DocToSkillConverter(self.config, dry_run=True)

    def test_valid_url_with_include_pattern(self):
        """Test URL matching include pattern"""
        url = "https://docs.example.com/guide/getting-started"
        self.assertTrue(self.converter.is_valid_url(url))

    def test_valid_url_with_api_pattern(self):
        """Test URL matching API pattern"""
        url = "https://docs.example.com/api/reference"
        self.assertTrue(self.converter.is_valid_url(url))

    def test_invalid_url_with_exclude_pattern(self):
        """Test URL matching exclude pattern"""
        url = "https://docs.example.com/blog/announcement"
        self.assertFalse(self.converter.is_valid_url(url))

    def test_invalid_url_different_domain(self):
        """Test URL from different domain"""
        url = "https://other-site.com/guide/tutorial"
        self.assertFalse(self.converter.is_valid_url(url))

    def test_invalid_url_no_include_match(self):
        """Test URL not matching any include pattern"""
        url = "https://docs.example.com/download/installer"
        self.assertFalse(self.converter.is_valid_url(url))

    def test_url_validation_no_patterns(self):
        """Test URL validation with no include/exclude patterns"""
        config = {
            "name": "test",
            "base_url": "https://docs.example.com/",
            "url_patterns": {"include": [], "exclude": []},
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre"},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        converter = DocToSkillConverter(config, dry_run=True)

        # Should accept any URL under base_url
        self.assertTrue(converter.is_valid_url("https://docs.example.com/anything"))
        self.assertFalse(converter.is_valid_url("https://other.com/anything"))


class TestLanguageDetection(unittest.TestCase):
    """Test language detection from code blocks"""

    def setUp(self):
        """Set up test converter"""
        config = {
            "name": "test",
            "base_url": "https://example.com/",
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre"},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        self.converter = DocToSkillConverter(config, dry_run=True)

    def test_detect_language_from_class(self):
        """Test language detection from CSS class"""
        html = '<code class="language-python">print("hello")</code>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        lang = self.converter.detect_language(elem, 'print("hello")')
        self.assertEqual(lang, "python")

    def test_detect_language_from_lang_class(self):
        """Test language detection from lang- prefix"""
        html = '<code class="lang-javascript">console.log("hello")</code>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        lang = self.converter.detect_language(elem, 'console.log("hello")')
        self.assertEqual(lang, "javascript")

    def test_detect_language_from_parent(self):
        """Test language detection from parent pre element"""
        html = '<pre class="language-cpp"><code>int main() {}</code></pre>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        lang = self.converter.detect_language(elem, "int main() {}")
        self.assertEqual(lang, "cpp")

    def test_detect_python_from_heuristics(self):
        """Test Python detection from code content"""
        html = "<code>import os\nfrom pathlib import Path</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "python")

    def test_detect_python_from_def(self):
        """Test Python detection from def keyword"""
        html = "<code>def my_function():\n    pass</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "python")

    def test_detect_javascript_from_const(self):
        """Test JavaScript detection from const keyword"""
        html = "<code>const myVar = 10;</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "javascript")

    def test_detect_javascript_from_arrow(self):
        """Test JavaScript detection from arrow function"""
        html = "<code>const add = (a, b) => a + b;</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "javascript")

    def test_detect_gdscript(self):
        """Test GDScript detection"""
        html = "<code>func _ready():\n    var x = 5</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "gdscript")

    def test_detect_cpp(self):
        """Test C++ detection"""
        html = "<code>#include <iostream>\nint main() { return 0; }</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "cpp")

    def test_detect_unknown(self):
        """Test unknown language detection"""
        html = "<code>some random text without clear indicators</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "unknown")

    def test_detect_brush_pattern_in_pre(self):
        """Test brush: pattern in pre element"""
        html = '<pre class="brush: python"><code>x</code></pre>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        lang = self.converter.detect_language(elem, "x")
        self.assertEqual(lang, "python", "Should detect python from brush: python pattern")

    def test_detect_bare_class_in_pre(self):
        """Test bare class name in pre element"""
        html = '<pre class="python"><code>x</code></pre>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        lang = self.converter.detect_language(elem, "x")
        self.assertEqual(lang, "python", "Should detect python from bare class name")

    def test_detect_bare_class_in_code(self):
        """Test bare class name in code element"""
        html = '<code class="python">x</code>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        lang = self.converter.detect_language(elem, "x")
        self.assertEqual(lang, "python", "Should detect python from bare class name")

    def test_detect_csharp_from_using_system(self):
        """Test C# detection from 'using System' keyword"""
        html = "<code>using System;\nnamespace MyApp { }</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from using System")

    def test_detect_csharp_from_namespace(self):
        """Test C# detection from 'namespace' keyword"""
        html = "<code>namespace MyNamespace\n{\n    public class Test { }\n}</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from namespace")

    def test_detect_csharp_from_property_syntax(self):
        """Test C# detection from property syntax"""
        html = "<code>public string Name { get; set; }</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from { get; set; } syntax")

    def test_detect_csharp_from_public_class(self):
        """Test C# detection from 'public class' keyword"""
        html = "<code>public class MyClass\n{\n    private int value;\n}</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from public class")

    def test_detect_csharp_from_private_class(self):
        """Test C# detection from 'private class' keyword"""
        html = "<code>private class Helper { }</code>"
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from private class")

    def test_detect_csharp_from_public_static_void(self):
        """Test C# detection from 'public static void' keyword"""
        html = '<code>public static void Main(string[] args)\n{\n    Console.WriteLine("Test");\n}</code>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from public static void")

    def test_detect_csharp_from_class_attribute(self):
        """Test C# detection from CSS class attribute"""
        html = '<code class="language-csharp">var x = 5;</code>'
        elem = BeautifulSoup(html, "html.parser").find("code")
        code = elem.get_text()
        lang = self.converter.detect_language(elem, code)
        self.assertEqual(lang, "csharp", "Should detect C# from language-csharp class")


class TestPatternExtraction(unittest.TestCase):
    """Test pattern extraction from documentation"""

    def setUp(self):
        """Set up test converter"""
        config = {
            "name": "test",
            "base_url": "https://example.com/",
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre"},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        self.converter = DocToSkillConverter(config, dry_run=True)

    def test_extract_pattern_with_example_marker(self):
        """Test pattern extraction with 'Example:' marker"""
        html = """
        <article>
            <p>Example: Here's how to use it</p>
            <pre><code>print("hello")</code></pre>
        </article>
        """
        soup = BeautifulSoup(html, "html.parser")
        main = soup.find("article")
        patterns = self.converter.extract_patterns(main, [])

        self.assertGreater(len(patterns), 0)
        self.assertIn("example", patterns[0]["description"].lower())

    def test_extract_pattern_with_usage_marker(self):
        """Test pattern extraction with 'Usage:' marker"""
        html = """
        <article>
            <p>Usage: Call this function like so</p>
            <pre><code>my_function(arg)</code></pre>
        </article>
        """
        soup = BeautifulSoup(html, "html.parser")
        main = soup.find("article")
        patterns = self.converter.extract_patterns(main, [])

        self.assertGreater(len(patterns), 0)
        self.assertIn("usage", patterns[0]["description"].lower())

    def test_extract_pattern_limit(self):
        """Test pattern extraction limits to 5 patterns"""
        html = "<article>"
        for i in range(10):
            html += f"<p>Example {i}: Test</p><pre><code>code_{i}</code></pre>"
        html += "</article>"

        soup = BeautifulSoup(html, "html.parser")
        main = soup.find("article")
        patterns = self.converter.extract_patterns(main, [])

        self.assertLessEqual(len(patterns), 5, "Should limit to 5 patterns max")


class TestCategorization(unittest.TestCase):
    """Test smart categorization logic"""

    def setUp(self):
        """Set up test converter"""
        config = {
            "name": "test",
            "base_url": "https://example.com/",
            "categories": {
                "getting_started": ["intro", "tutorial", "getting-started"],
                "api": ["api", "reference", "class"],
                "guides": ["guide", "how-to"],
            },
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre"},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        self.converter = DocToSkillConverter(config, dry_run=True)

    def test_categorize_by_url(self):
        """Test categorization based on URL"""
        pages = [
            {
                "url": "https://example.com/api/reference",
                "title": "Some Title",
                "content": "Some content",
            }
        ]
        categories = self.converter.smart_categorize(pages)

        # Should categorize to 'api' based on URL containing 'api'
        self.assertIn("api", categories)
        self.assertEqual(len(categories["api"]), 1)

    def test_categorize_by_title(self):
        """Test categorization based on title"""
        pages = [
            {
                "url": "https://example.com/docs/page",
                "title": "API Reference Documentation",
                "content": "Some content",
            }
        ]
        categories = self.converter.smart_categorize(pages)

        self.assertIn("api", categories)
        self.assertEqual(len(categories["api"]), 1)

    def test_categorize_by_content(self):
        """Test categorization based on content (lower priority)"""
        pages = [
            {
                "url": "https://example.com/docs/page",
                "title": "Some Page",
                "content": "This is a tutorial for beginners. An intro to the system.",
            }
        ]
        categories = self.converter.smart_categorize(pages)

        # Should categorize based on 'tutorial' and 'intro' in content
        self.assertIn("getting_started", categories)

    def test_categorize_to_other(self):
        """Test pages that don't match any category go to 'other'"""
        pages = [
            {
                "url": "https://example.com/random/page",
                "title": "Random Page",
                "content": "Random content with no keywords",
            }
        ]
        categories = self.converter.smart_categorize(pages)

        self.assertIn("other", categories)
        self.assertEqual(len(categories["other"]), 1)

    def test_empty_categories_removed(self):
        """Test empty categories are removed"""
        pages = [
            {
                "url": "https://example.com/api/reference",
                "title": "API Reference",
                "content": "API documentation",
            }
        ]
        categories = self.converter.smart_categorize(pages)

        # Only 'api' should exist, not empty 'guides' or 'getting_started'
        # (categories with no pages are removed)
        self.assertIn("api", categories)
        self.assertNotIn("guides", categories)


class TestLinkExtraction(unittest.TestCase):
    """Test link extraction and anchor fragment handling"""

    def setUp(self):
        """Set up test converter"""
        config = {
            "name": "test",
            "base_url": "https://example.com/",
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre code"},
            "url_patterns": {"include": [], "exclude": []},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        self.converter = DocToSkillConverter(config, dry_run=True)

    def test_extract_links_strips_anchor_fragments(self):
        """Test that anchor fragments (#anchor) are stripped from extracted links"""
        html = """
        <article>
            <h1>Test Page</h1>
            <p>Content with links</p>
            <a href="https://example.com/docs/page.html#section1">Link 1</a>
            <a href="https://example.com/docs/page.html#section2">Link 2</a>
            <a href="https://example.com/docs/other.html">Link 3</a>
        </article>
        """
        soup = BeautifulSoup(html, "html.parser")
        page = self.converter.extract_content(soup, "https://example.com/")

        # Should have 2 unique URLs (page.html and other.html), not 3
        # The two links with different anchors should be deduplicated
        self.assertEqual(len(page["links"]), 2)
        self.assertIn("https://example.com/docs/page.html", page["links"])
        self.assertIn("https://example.com/docs/other.html", page["links"])

    def test_extract_links_no_anchor_duplicates(self):
        """Test that multiple anchor links to same page don't create duplicates"""
        html = """
        <article>
            <h1>Test Page</h1>
            <a href="https://example.com/docs/api.html#cb1-1">Anchor 1</a>
            <a href="https://example.com/docs/api.html#cb1-2">Anchor 2</a>
            <a href="https://example.com/docs/api.html#cb1-3">Anchor 3</a>
            <a href="https://example.com/docs/api.html#cb1-4">Anchor 4</a>
            <a href="https://example.com/docs/api.html#cb1-5">Anchor 5</a>
        </article>
        """
        soup = BeautifulSoup(html, "html.parser")
        page = self.converter.extract_content(soup, "https://example.com/")

        # All 5 links point to the same page, should result in only 1 URL
        self.assertEqual(len(page["links"]), 1)
        self.assertEqual(page["links"][0], "https://example.com/docs/api.html")

    def test_extract_links_preserves_query_params(self):
        """Test that query parameters are preserved when stripping anchors"""
        html = """
        <article>
            <h1>Test Page</h1>
            <a href="https://example.com/search?q=test#result1">Search Result</a>
        </article>
        """
        soup = BeautifulSoup(html, "html.parser")
        page = self.converter.extract_content(soup, "https://example.com/")

        # Query params should be preserved, only anchor stripped
        self.assertEqual(len(page["links"]), 1)
        self.assertEqual(page["links"][0], "https://example.com/search?q=test")

    def test_extract_links_relative_urls_with_anchors(self):
        """Test that relative URLs with anchors are handled correctly"""
        html = """
        <article>
            <h1>Test Page</h1>
            <a href="/docs/guide.html#intro">Relative Link 1</a>
            <a href="/docs/guide.html#advanced">Relative Link 2</a>
            <a href="/docs/tutorial.html#start">Relative Link 3</a>
        </article>
        """
        soup = BeautifulSoup(html, "html.parser")
        page = self.converter.extract_content(soup, "https://example.com/")

        # Should have 2 unique URLs (guide.html and tutorial.html)
        self.assertEqual(len(page["links"]), 2)
        self.assertIn("https://example.com/docs/guide.html", page["links"])
        self.assertIn("https://example.com/docs/tutorial.html", page["links"])


class TestTextCleaning(unittest.TestCase):
    """Test text cleaning utility"""

    def setUp(self):
        """Set up test converter"""
        config = {
            "name": "test",
            "base_url": "https://example.com/",
            "selectors": {"main_content": "article", "title": "h1", "code_blocks": "pre"},
            "rate_limit": 0.1,
            "max_pages": 10,
        }
        self.converter = DocToSkillConverter(config, dry_run=True)

    def test_clean_multiple_spaces(self):
        """Test cleaning multiple spaces"""
        text = "Hello    world     test"
        cleaned = self.converter.clean_text(text)
        self.assertEqual(cleaned, "Hello world test")

    def test_clean_newlines(self):
        """Test cleaning newlines"""
        text = "Hello\n\nworld\ntest"
        cleaned = self.converter.clean_text(text)
        self.assertEqual(cleaned, "Hello world test")

    def test_clean_tabs(self):
        """Test cleaning tabs"""
        text = "Hello\t\tworld\ttest"
        cleaned = self.converter.clean_text(text)
        self.assertEqual(cleaned, "Hello world test")

    def test_clean_strip_whitespace(self):
        """Test stripping leading/trailing whitespace"""
        text = "   Hello world   "
        cleaned = self.converter.clean_text(text)
        self.assertEqual(cleaned, "Hello world")


if __name__ == "__main__":
    unittest.main()