// Command pvfcmpscene 逐字节比较两个 Script.pvf 里 storydigest / townmovielist
// 这几个过场相关文件是否一致。
//
// 用法:
//
//	go run ./cmd/scratch/pvfcmpscene -a <旧.pvf> -b <新.pvf>
package main

import (
	"crypto/sha256"
	"flag"
	"fmt"
	"os"

	platformpvf "longheng.io/server/internal/platform/pvf"
)

func main() {
	aPath := flag.String("a", "", "对照 PVF")
	bPath := flag.String("b", "", "待检查 PVF")
	flag.Parse()
	if *aPath == "" || *bPath == "" {
		fmt.Fprintln(os.Stderr, "需要 -a 与 -b")
		os.Exit(2)
	}
	a, err := platformpvf.Open(*aPath)
	if err != nil {
		fmt.Fprintln(os.Stderr, "打开 A 失败:", err)
		os.Exit(1)
	}
	b, err := platformpvf.Open(*bPath)
	if err != nil {
		fmt.Fprintln(os.Stderr, "打开 B 失败:", err)
		os.Exit(1)
	}
	paths := []string{
		"etc/storydigest/scene.etc",
		"etc/storydigest/digest.etc",
		"etc/townmovielist.etc",
	}
	for _, rel := range paths {
		rawA, errA := a.ReadRaw(rel)
		rawB, errB := b.ReadRaw(rel)
		if errA != nil || errB != nil {
			fmt.Printf("%-34s A=%v B=%v\n", rel, errA, errB)
			continue
		}
		same := len(rawA) == len(rawB)
		diffCount := 0
		if same {
			for i := range rawA {
				if rawA[i] != rawB[i] {
					diffCount++
				}
			}
			same = diffCount == 0
		}
		fmt.Printf("%-34s A=%d B=%d  相同=%v", rel, len(rawA), len(rawB), same)
		if !same {
			fmt.Printf("  不同字节=%d", diffCount)
		}
		sumA := sha256.Sum256(rawA)
		sumB := sha256.Sum256(rawB)
		fmt.Printf("  shaA=%x shaB=%x\n", sumA[:6], sumB[:6])
	}
}