package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

// --- Testing ---

func parseFile(path string) {
	file, _ := os.Open(path)
	if file == nil {
		fmt.Println("Could not open file:", path)
		return
	}
	defer file.Close()

	fscanner := bufio.NewScanner(file)
	for fscanner.Scan() {
		var input = fscanner.Text()
		input = strings.TrimSpace(input)

		if len(input) == 0 {
			continue
		}

		if strings.HasPrefix(input, "//") {
			input = strings.Trim(input, "/ ")
			fmt.Printf("\n=== %s ===\n", input)
			continue
		}

		input = strings.Trim(input, "\",")

		hand, err := NewHand(input)
		if err != nil {
			fmt.Println("Error:", err)
			continue
		}

		result := hand.Evaluate()
		fmt.Printf("Input: [%s]\nResult: %s\n", input, handNames[result.Category])
	}
}

// Reads all hands and compares them against each other
func compareFileAllVsAll(path string) {
	file, err := os.Open(path)
	if err != nil {
		fmt.Println("Error opening file:", err)
		return
	}
	defer file.Close()

	type SavedHand struct {
		Raw  string
		Hand *Hand
	}
	var allHands []SavedHand

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := strings.TrimSpace(scanner.Text())

		if len(line) == 0 || strings.HasPrefix(line, "//") {
			continue
		}

		cleanLine := strings.Trim(line, "\",")

		hand, err := NewHand(cleanLine)
		if err != nil {
			continue
		}

		allHands = append(allHands, SavedHand{Raw: cleanLine, Hand: hand})
	}

	count := 0
	for i := 0; i < len(allHands); i++ {
		for j := i; j < len(allHands); j++ {
			h1 := allHands[i]
			h2 := allHands[j]

			winner := h1.Hand.Compare(h2.Hand)

			fmt.Printf("Comparison: [%s] vs [%s]\n", h1.Raw, h2.Raw)

			h1Result := h1.Hand.Evaluate()
			h2Result := h2.Hand.Evaluate()

			switch winner {
			case 1:
				fmt.Printf("Winner: Hand 1 (%s beats %s)\n", handNames[h1Result.Category], handNames[h2Result.Category])
			case 2:
				fmt.Printf("Winner: Hand 2 (%s beats %s)\n", handNames[h2Result.Category], handNames[h1Result.Category])
			default:
				fmt.Printf("Tie: %s\n", handNames[h1Result.Category])
			}

			fmt.Println()
			count++
		}
	}
	fmt.Printf("Total comparisons: %d\n", count)
}

// --- Main ---

func main() {
	filename := "Hands to be tested.txt"

	fmt.Println("--- Task 1a: Single Evaluation ---")
	parseFile(filename)

	fmt.Println("\n--- Task 1b: Comparison (All vs All) ---")
	compareFileAllVsAll(filename)
}