#!/usr/bin/env python3
"""
Tests for cli/estimate_pages.py functionality
"""

import unittest
import tempfile
import json
from pathlib import Path
import sys

from skill_seekers.cli.estimate_pages import estimate_pages


class TestEstimatePages(unittest.TestCase):
    """Test estimate_pages function"""

    def test_estimate_pages_with_minimal_config(self):
        """Test estimation with minimal configuration"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'rate_limit': 0.1
        }

        # This will make real HTTP request to example.com
        # We use low max_discovery to keep test fast
        result = estimate_pages(config, max_discovery=2, timeout=5)

        # Check result structure
        self.assertIsInstance(result, dict)
        self.assertIn('discovered', result)
        self.assertIn('estimated_total', result)
        # Actual key is elapsed_seconds, not time_elapsed
        self.assertIn('elapsed_seconds', result)

    def test_estimate_pages_returns_discovered_count(self):
        """Test that result contains discovered page count"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'rate_limit': 0.1
        }

        result = estimate_pages(config, max_discovery=1, timeout=5)

        self.assertGreaterEqual(result['discovered'], 0)
        self.assertIsInstance(result['discovered'], int)

    def test_estimate_pages_respects_max_discovery(self):
        """Test that estimation respects max_discovery limit"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'rate_limit': 0.1
        }

        result = estimate_pages(config, max_discovery=3, timeout=5)

        # Should not discover more than max_discovery
        self.assertLessEqual(result['discovered'], 3)

    def test_estimate_pages_with_start_urls(self):
        """Test estimation with custom start_urls"""
        config = {
            'name': 'test',
            'base_url': 'https://example.com/',
            'start_urls': ['https://example.com/'],
            'rate_limit': 0.1
        }

        result = estimate_pages(config, max_discovery=2, timeout=5)

        self.assertIsInstance(result, dict)
        self.assertIn('discovered', result)


class TestEstimatePagesCLI(unittest.TestCase):
    """Test estimate_pages command-line interface (via entry point)"""

    def test_cli_help_output(self):
        """Test that skill-seekers estimate --help works"""
        import subprocess

        try:
            result = subprocess.run(
                ['skill-seekers', 'estimate', '--help'],
                capture_output=True,
                text=True,
                timeout=5
            )

            # Should return successfully (0 or 2 for argparse)
            self.assertIn(result.returncode, [0, 2])
            output = result.stdout + result.stderr
            self.assertTrue('usage:' in output.lower() or 'estimate' in output.lower())
        except FileNotFoundError:
            self.skipTest("skill-seekers command not installed")

    def test_cli_executes_with_help_flag(self):
        """Test that skill-seekers-estimate entry point works"""
        import subprocess

        try:
            result = subprocess.run(
                ['skill-seekers-estimate', '--help'],
                capture_output=True,
                text=True,
                timeout=5
            )

            # Should return successfully
            self.assertIn(result.returncode, [0, 2])
        except FileNotFoundError:
            self.skipTest("skill-seekers-estimate command not installed")

    def test_cli_requires_config_argument(self):
        """Test that CLI requires config file argument"""
        import subprocess

        try:
            # Run without config argument
            result = subprocess.run(
                ['skill-seekers', 'estimate'],
                capture_output=True,
                text=True,
                timeout=5
            )

            # Should fail (non-zero exit code) or show usage
            self.assertTrue(
                result.returncode != 0 or 'usage' in result.stderr.lower() or 'usage' in result.stdout.lower()
            )
        except FileNotFoundError:
            self.skipTest("skill-seekers command not installed")


class TestEstimatePagesWithRealConfig(unittest.TestCase):
    """Test estimation with real config files (if available)"""

    def test_estimate_with_real_config_file(self):
        """Test estimation using a real config file (if exists)"""
        config_path = Path('configs/react.json')

        if not config_path.exists():
            self.skipTest("configs/react.json not found")

        with open(config_path, 'r') as f:
            config = json.load(f)

        # Use very low max_discovery to keep test fast
        result = estimate_pages(config, max_discovery=3, timeout=5)

        self.assertIsInstance(result, dict)
        self.assertIn('discovered', result)
        self.assertGreater(result['discovered'], 0)


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