package cli

import (
	"bytes"
	"fmt"
	"os"
	"strings"
	"testing"

	"git.nakama.town/fmartingr/dharma/pkg/reporter"
	"git.nakama.town/fmartingr/dharma/pkg/scraper"
	"git.nakama.town/fmartingr/dharma/pkg/testutil"
	"github.com/spf13/cobra"
)

func TestIntegrationTestsite(t *testing.T) {
	// Skip this test if running in CI environment or if it's a short test run
	if testing.Short() {
		t.Skip("Skipping integration test in short mode")
	}

	// Start the testsite server
	serverURL, cleanup, err := testutil.StartTestsiteServer()
	if err != nil {
		t.Fatalf("Failed to start test server: %v", err)
	}
	defer cleanup()

	// Test cases for CLI invocation with different flags
	testCases := []struct {
		name       string
		args       []string
		wantOutput bool
		wantErrors bool
	}{
		{
			name:       "Basic scan",
			args:       []string{serverURL},
			wantOutput: true,
			wantErrors: true,
		},
		{
			name:       "JSON output",
			args:       []string{"--format", "json", serverURL},
			wantOutput: true,
			wantErrors: true,
		},
		{
			name:       "Internal links only",
			args:       []string{"--internal-only", serverURL},
			wantOutput: true,
			wantErrors: true,
		},
		{
			name:       "Custom depth",
			args:       []string{"--depth", "1", serverURL},
			wantOutput: true,
			wantErrors: true,
		},
		{
			name:       "Custom concurrency",
			args:       []string{"--concurrency", "1", serverURL},
			wantOutput: true,
			wantErrors: true,
		},
		{
			name:       "Custom timeout",
			args:       []string{"--timeout", "5", serverURL},
			wantOutput: true,
			wantErrors: true,
		},
		{
			name:       "CSV output",
			args:       []string{"--format", "csv", serverURL},
			wantOutput: true,
			wantErrors: true,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			// Temporarily replace stdout to capture output
			oldStdout := os.Stdout
			r, w, _ := os.Pipe()
			os.Stdout = w

			// Save and restore rootCmd so state doesn't leak between test cases
			origRootCmd := rootCmd
			defer func() {
				rootCmd = origRootCmd
				os.Stdout = oldStdout
			}()

			// Reset rootCmd for this test
			rootCmd = createRootCmd()

			// Set the command line arguments
			os.Args = append([]string{"dharma"}, tc.args...)

			// Execute the CLI
			err := Execute()
			if err != nil {
				t.Fatalf("Failed to execute command: %v", err)
			}

			// Restore stdout and read the output
			w.Close()
			var buf bytes.Buffer
			_, err = buf.ReadFrom(r)
			if err != nil {
				t.Fatalf("Failed to read output: %v", err)
			}
			output := buf.String()

			// Check if we got any output
			if tc.wantOutput && output == "" {
				t.Errorf("Expected output but got none")
			}

			// Check if errors were reported for known broken links
			if tc.wantErrors {
				if !strings.Contains(output, "not_found.html") {
					t.Errorf("Expected not_found.html to be reported as broken in output")
				}
			}

			// Specific checks for different formats
			if strings.Contains(tc.name, "JSON") {
				if !strings.Contains(output, `"url":`) {
					t.Errorf("Expected JSON output with 'url' field")
				}
			} else if strings.Contains(tc.name, "CSV") {
				if !strings.Contains(output, "Status,Type,URL,Source URL,Error") {
					t.Errorf("Expected CSV header in output")
				}
			}
		})
	}
}

// createRootCmd returns a fresh instance of the root command
func createRootCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "dharma [URL]",
		Short: "Scrape websites and check for broken links and references",
		Long:  `Dharma is a website link checker tool that crawls a website to find broken links, images, CSS references, and more. It generates a report of all issues found.`,
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			url := args[0]

			// Only print status message when using pretty format
			if format == "pretty" {
				if !strings.HasPrefix(url, "file://") {
					fmt.Printf("Scanning website: %s\n", url)
				} else {
					fmt.Printf("Scanning local directory: %s\n", strings.TrimPrefix(url, "file://"))
				}
			} else {
				// Force verbose off for non-pretty formats
				verbose = false
			}

			// Create a new scraper
			s := scraper.New(
				scraper.WithConcurrency(concurrency),
				scraper.WithDepth(depth),
				scraper.WithTimeout(timeout),
				scraper.WithVerbose(verbose),
				scraper.WithInternalOnly(internalOnly),
			)

			// Run the scraper
			results, err := s.Scan(url)
			if err != nil {
				return err
			}

			// Generate report
			r, err := reporter.New(format)
			if err != nil {
				return err
			}

			return r.Generate(results, os.Stdout)
		},
	}

	cmd.Flags().StringVarP(&format, "format", "f", "pretty", "Output format (pretty, json, csv)")
	cmd.Flags().IntVarP(&concurrency, "concurrency", "c", 10, "Number of concurrent requests")
	cmd.Flags().IntVarP(&depth, "depth", "d", 3, "Maximum depth to crawl")
	cmd.Flags().IntVarP(&timeout, "timeout", "t", 10, "Timeout in seconds for each request")
	cmd.Flags().BoolVarP(&verbose, "verbose", "v", false, "Verbose output")
	cmd.Flags().BoolVarP(&internalOnly, "internal-only", "i", false, "Only check internal links (same hostname)")

	return cmd
}