package cmd

import (
	"context"
	"fmt"
	"time"

	"git.gostacks.org/iwasforcedtobehere/fastestmirror/internal/distro"
	"git.gostacks.org/iwasforcedtobehere/fastestmirror/internal/mirror"
	"github.com/fatih/color"
	"github.com/spf13/cobra"
)

var (
	verbose  bool
	timeout  int
	topCount int
)

var findCmd = &cobra.Command{
	Use:   "find",
	Short: "Find the fastest mirrors for your distribution",
	Long: `Find and test mirrors to determine which ones will make your package 
manager fly faster than a caffinated developer on Monday morning.

This command will:
  • Auto-detect your Linux distribution
  • Test multiple mirrors concurrently  
  • Rank them by speed and reliability
  • Show you the results in glorious color`,
	RunE: runFind,
}

func runFind(cmd *cobra.Command, args []string) error {
	// Detect distribution
	fmt.Println(color.CyanString("Detecting your Linux distribution..."))

	distroInfo, err := distro.DetectDistribution()
	if err != nil {
		return fmt.Errorf("fuck me, couldn't detect your distro: %w", err)
	}

	fmt.Printf("Found: %s\n", color.GreenString(distroInfo.String()))

	if !distroInfo.IsSupported() {
		return fmt.Errorf("sorry, %s isn't supported yet - but hey, you're using something exotic! 🦄", distroInfo.ID)
	}

	// Get mirrors for this distribution family
	fmt.Printf("Loading mirrors for %s family...\n", color.YellowString(distroInfo.Family))

	mirrorList := mirror.NewMirrorList(distroInfo.Family)

	// Load mirrors from official sources
	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(timeout)*time.Second*5)
	defer cancel()

	err = mirrorList.LoadMirrors(ctx, distroInfo.Family)
	if err != nil {
		return fmt.Errorf("failed to load mirrors: %w", err)
	}

	fmt.Printf("Testing mirrors (timeout: %ds each)...\n", timeout)

	err = mirrorList.TestMirrors(ctx, time.Duration(timeout)*time.Second)

	if err != nil {
		return fmt.Errorf("mirror testing failed: %w", err)
	}

	// Display results
	fmt.Println("\n" + color.GreenString("Testing complete! Here are your results:"))
	fmt.Println()

	topMirrors := mirrorList.GetTop(topCount)
	allMirrors := mirrorList.GetAll()

	// Show summary of all tests
	successCount := 0
	for _, mirror := range allMirrors {
		if mirror.Error == nil {
			successCount++
		}
	}

	if verbose {
		fmt.Printf("Test Summary: %d/%d mirrors responded successfully\n", successCount, len(allMirrors))
		fmt.Println()
	}
	if len(topMirrors) == 0 {
		fmt.Println(color.RedString("No working mirrors found. Your internet might be fucked, or all mirrors are down."))
		return nil
	}

	// Display top mirrors in a nice table format
	fmt.Printf("%-4s %-50s %-12s %-10s %-8s\n",
		color.CyanString("Rank"),
		color.CyanString("Mirror URL"),
		color.CyanString("Latency"),
		color.CyanString("Speed"),
		color.CyanString("Score"))
	fmt.Println(color.HiBlackString("─────────────────────────────────────────────────────────────────────────────────"))

	for i, m := range topMirrors {
		rank := color.YellowString("#%d", i+1)
		url := m.URL
		if len(url) > 48 {
			url = url[:45] + "..."
		}

		latencyStr := color.GreenString("%dms", m.Latency.Milliseconds())
		if m.Latency > 500*time.Millisecond {
			latencyStr = color.RedString("%dms", m.Latency.Milliseconds())
		} else if m.Latency > 200*time.Millisecond {
			latencyStr = color.YellowString("%dms", m.Latency.Milliseconds())
		}

		speedStr := color.GreenString("%.1f MB/s", m.Speed)
		if m.Speed < 1.0 {
			speedStr = color.RedString("%.1f MB/s", m.Speed)
		} else if m.Speed < 5.0 {
			speedStr = color.YellowString("%.1f MB/s", m.Speed)
		}

		scoreStr := color.CyanString("%.1f", m.Score)

		fmt.Printf("%-4s %-50s %-12s %-10s %-8s\n",
			rank, url, latencyStr, speedStr, scoreStr)
	}

	fmt.Println()
	best := mirrorList.GetBest()
	if best != nil {
		fmt.Printf("Winner: %s\n", color.GreenString(best.URL))
		fmt.Printf("This bad boy clocks in at %.1f MB/s with %dms latency\n",
			best.Speed, best.Latency.Milliseconds())
	}

	// Show failed mirror count in verbose mode (no detailed errors)
	if verbose {
		failedCount := 0
		for _, m := range allMirrors {
			if m.Error != nil {
				failedCount++
			}
		}

		if failedCount > 0 {
			fmt.Println()
			fmt.Printf("Failed mirrors: %d (errors hidden for cleaner output)\n", failedCount)
		}
	}

	fmt.Println()
	fmt.Printf("To apply the fastest mirror, run: %s\n",
		color.CyanString("fastestmirror apply"))

	return nil
}

func init() {
	rootCmd.AddCommand(findCmd)

	findCmd.Flags().BoolVarP(&verbose, "verbose", "v", false, "Show verbose output")
	findCmd.Flags().IntVarP(&timeout, "timeout", "t", 10, "Timeout for each mirror test in seconds")
	findCmd.Flags().IntVarP(&topCount, "top", "n", 5, "Number of top mirrors to display")
}