#!/usr/bin/env python3
"""
Tests for parallel scraping, unlimited mode, and rate limiting features (PR #144)
"""

import sys
import os
import unittest
import tempfile
import json
import time
from pathlib import Path
from unittest.mock import Mock, patch, MagicMock
from collections import deque

from skill_seekers.cli.doc_scraper import DocToSkillConverter


class TestParallelScrapingConfiguration(unittest.TestCase):
    """Test parallel scraping configuration and initialization"""

    def setUp(self):
        """Save original working directory"""
        self.original_cwd = os.getcwd()

    def tearDown(self):
        """Restore original working directory"""
        os.chdir(self.original_cwd)

    def test_single_worker_default(self):
        """Test default is single-worker mode"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': 10
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 1)
            self.assertFalse(hasattr(converter, 'lock'))

    def test_multiple_workers_creates_lock(self):
        """Test multiple workers creates thread lock"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': 10,
            'workers': 4
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 4)
            self.assertTrue(hasattr(converter, 'lock'))

    def test_workers_from_config(self):
        """Test workers parameter is read from config"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'workers': 8
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 8)


class TestUnlimitedMode(unittest.TestCase):
    """Test unlimited scraping mode"""

    def setUp(self):
        """Save original working directory"""
        self.original_cwd = os.getcwd()

    def tearDown(self):
        """Restore original working directory"""
        os.chdir(self.original_cwd)

    def test_unlimited_with_none(self):
        """Test max_pages: None enables unlimited mode"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': None
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertIsNone(converter.config.get('max_pages'))

    def test_unlimited_with_minus_one(self):
        """Test max_pages: -1 enables unlimited mode"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': -1
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.config.get('max_pages'), -1)

    def test_limited_mode_default(self):
        """Test default max_pages is limited"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'}
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            max_pages = converter.config.get('max_pages', 500)
            self.assertIsNotNone(max_pages)
            self.assertGreater(max_pages, 0)


class TestRateLimiting(unittest.TestCase):
    """Test rate limiting configuration"""

    def setUp(self):
        """Save original working directory"""
        self.original_cwd = os.getcwd()

    def tearDown(self):
        """Restore original working directory"""
        os.chdir(self.original_cwd)

    def test_rate_limit_from_config(self):
        """Test rate_limit is read from config"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'rate_limit': 0.1
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.config.get('rate_limit'), 0.1)

    def test_rate_limit_default(self):
        """Test default rate_limit is 0.5"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'}
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.config.get('rate_limit', 0.5), 0.5)

    def test_zero_rate_limit_disables(self):
        """Test rate_limit: 0 disables rate limiting"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'rate_limit': 0
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.config.get('rate_limit'), 0)


class TestThreadSafety(unittest.TestCase):
    """Test thread-safety fixes"""

    def setUp(self):
        """Save original working directory"""
        self.original_cwd = os.getcwd()

    def tearDown(self):
        """Restore original working directory"""
        os.chdir(self.original_cwd)

    def test_lock_protects_visited_urls(self):
        """Test visited_urls operations are protected by lock"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'workers': 4
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)

            # Verify lock exists
            self.assertTrue(hasattr(converter, 'lock'))

            # Verify it's a threading.Lock
            import threading
            self.assertIsInstance(converter.lock, type(threading.Lock()))

    def test_single_worker_no_lock(self):
        """Test single worker doesn't create unnecessary lock"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'workers': 1
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertFalse(hasattr(converter, 'lock'))


class TestScrapingModes(unittest.TestCase):
    """Test different scraping mode combinations"""

    def setUp(self):
        """Save original working directory"""
        self.original_cwd = os.getcwd()

    def tearDown(self):
        """Restore original working directory"""
        os.chdir(self.original_cwd)

    def test_single_threaded_limited(self):
        """Test traditional single-threaded limited mode"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': 10,
            'workers': 1
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 1)
            self.assertEqual(converter.config.get('max_pages'), 10)

    def test_parallel_limited(self):
        """Test parallel scraping with page limit"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': 100,
            'workers': 4
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 4)
            self.assertEqual(converter.config.get('max_pages'), 100)
            self.assertTrue(hasattr(converter, 'lock'))

    def test_parallel_unlimited(self):
        """Test parallel scraping with unlimited pages"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': None,
            'workers': 8
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 8)
            self.assertIsNone(converter.config.get('max_pages'))
            self.assertTrue(hasattr(converter, 'lock'))

    def test_fast_scraping_mode(self):
        """Test fast scraping with low rate limit and workers"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'rate_limit': 0.1,
            'workers': 8,
            'max_pages': 1000
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertEqual(converter.workers, 8)
            self.assertEqual(converter.config.get('rate_limit'), 0.1)


class TestDryRunWithNewFeatures(unittest.TestCase):
    """Test dry-run mode works with new features"""

    def setUp(self):
        """Save original working directory"""
        self.original_cwd = os.getcwd()

    def tearDown(self):
        """Restore original working directory"""
        os.chdir(self.original_cwd)

    def test_dry_run_with_parallel(self):
        """Test dry-run with parallel workers"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'workers': 4
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertTrue(converter.dry_run)
            self.assertEqual(converter.workers, 4)

    def test_dry_run_with_unlimited(self):
        """Test dry-run with unlimited mode"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'selectors': {'main_content': 'article'},
            'max_pages': None
        }

        with tempfile.TemporaryDirectory() as tmpdir:
            os.chdir(tmpdir)
            converter = DocToSkillConverter(config, dry_run=True)
            self.assertTrue(converter.dry_run)
            self.assertIsNone(converter.config.get('max_pages'))


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