metro-puzzle-jp/tools/shots/main.go

// Genererar dokumentationens skärmdumpar deterministiskt:
//
//	go run ./tools/shots
//
// Bygger debug-binären, kör den med -script för varje bild och skriver
// PNG:er till doc/img/. Vägarna genom banorna räknas ut med BFS från
// bandatan. Kör om detta när grafik, UI eller banor ändrats, och committa
// bilderna – README och wikin pekar på dem.
package main

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"strings"

	"gitea.brasse-pc.eu/brasse/metro-puzzle-jp/internal/level"
)

type shot struct {
	level  string
	script string   // $OUT ersätts med doc/img-mappen
	args   []string // extra flaggor till spelet
}

// shots byggs i main eftersom vägarna räknas ut från bandatan (BFS), så att
// bilderna överlever ändringar i banorna.
var shots []shot

func buildShots(levelsDir string) error {
	l, err := level.LoadFile(filepath.Join(levelsDir, "001-flygplatsen.json"))
	if err != nil {
		return err
	}
	sign := l.Find(level.Sign)[1] // skylten vid spärrarna
	goal := l.Find(level.Platform)[0]
	toSign, err := moves(l, l.SpawnPoint(), sign)
	if err != nil {
		return err
	}
	toGoal, err := moves(l, sign, goal)
	if err != nil {
		return err
	}
	toMachine, err := moves(l, l.SpawnPoint(), l.Find(level.TicketMachine)[0])
	if err != nil {
		return err
	}
	l2, err := level.LoadFile(filepath.Join(levelsDir, "002-shinjuku.json"))
	if err != nil {
		return err
	}
	toMachine2, err := moves(l2, l2.SpawnPoint(), l2.Find(level.TicketMachine)[0])
	if err != nil {
		return err
	}
	l3, err := level.LoadFile(filepath.Join(levelsDir, "003-shibuya.json"))
	if err != nil {
		return err
	}
	toMachine3, err := moves(l3, l3.SpawnPoint(), l3.Find(level.TicketMachine)[0])
	if err != nil {
		return err
	}
	// Skyltbilderna tas med några kända ord så att markeringen och den
	// delvisa översättningen syns; hjälpen lär sedan in nästa ord.
	known := []string{"-know", "改札,番線,方面", "-seed", "7"}
	shots = []shot{
		{"", "wait 10; shot $OUT/menu.png; press l; wait 5; press down; press down; press down; wait 5; shot $OUT/words.png; quit",
			[]string{"-know", "改札,出口,トイレ", "-points", "3"}},
		{"001-flygplatsen", "move right 4; move down 2; wait 5; shot $OUT/level-001.png; quit", nil},
		{"002-shinjuku", "move down 6; move right 4; wait 5; shot $OUT/level-002.png; quit", nil},
		{"001-flygplatsen", toSign + "; wait 5; shot $OUT/sign.png; press h; wait 200; shot $OUT/sign-help.png; wait 200; shot $OUT/sign-learned.png; " + toGoal +
			"; waittrain; wait 30; shot $OUT/platform.png; press enter; wait 40; shot $OUT/ride.png; waitstop; press enter; wait 5; shot $OUT/result.png; quit", known},
		{"001-flygplatsen", toMachine + "; press enter; wait 5; press right; wait 5; shot $OUT/topup.png; quit", []string{"-seed", "7", "-card", "0"}},
		{"002-shinjuku", toMachine2 + "; press enter; wait 5; shot $OUT/ticket.png; quit", []string{"-seed", "7", "-know", "渋谷"}},
		{"003-shibuya", toMachine3 + "; press enter; pick 池袋; press enter; wait 5; press enter; press right; wait 5; shot $OUT/seats.png; quit",
			[]string{"-seed", "7", "-know", "池袋", "-debuffs", "sore_feet"}},
	}
	return nil
}

// moves gör om kortaste vägen mellan två rutor till "move DIR N"-steg.
func moves(l *level.Level, from, to level.Point) (string, error) {
	path := l.Path(from, to, l.CanEnter)
	if path == nil {
		return "", fmt.Errorf("ingen väg %v -> %v i %s", from, to, l.ID)
	}
	var parts []string
	dir, n := "", 0
	flush := func() {
		if n > 0 {
			parts = append(parts, fmt.Sprintf("move %s %d", dir, n))
		}
	}
	for i := 1; i < len(path); i++ {
		d := dirName(path[i-1], path[i])
		if d != dir {
			flush()
			dir, n = d, 0
		}
		n++
	}
	flush()
	return strings.Join(parts, "; "), nil
}

func dirName(a, b level.Point) string {
	switch {
	case b.X > a.X:
		return "right"
	case b.X < a.X:
		return "left"
	case b.Y > a.Y:
		return "down"
	default:
		return "up"
	}
}

func main() {
	root := repoRoot()
	out := filepath.Join(root, "doc", "img")
	must(os.MkdirAll(out, 0o755))
	must(buildShots(filepath.Join(root, "resources", "data", "levels")))

	build := exec.Command("go", "run", "./tools/build", "-mode", "debug")
	build.Dir, build.Stdout, build.Stderr = root, os.Stdout, os.Stderr
	must(build.Run())

	exe := filepath.Join(root, "build", "debug", "metro-puzzle-jp")
	if runtime.GOOS == "windows" {
		exe += ".exe"
	}
	for _, s := range shots {
		args := []string{"-script", strings.ReplaceAll(s.script, "$OUT", out)}
		if s.level != "" {
			args = append(args, "-level", s.level)
		}
		args = append(args, s.args...)
		run := exec.Command(exe, args...)
		run.Dir, run.Stdout, run.Stderr = filepath.Dir(exe), os.Stdout, os.Stderr
		if err := run.Run(); err != nil {
			fail(fmt.Errorf("%s: %w", s.script, err))
		}
	}
	fmt.Println("klart:", out)
}

func repoRoot() string {
	dir, _ := os.Getwd()
	for {
		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
			return dir
		}
		parent := filepath.Dir(dir)
		if parent == dir {
			fail(fmt.Errorf("hittade ingen go.mod"))
		}
		dir = parent
	}
}

func must(err error) {
	if err != nil {
		fail(err)
	}
}

func fail(err error) {
	fmt.Fprintln(os.Stderr, "shots:", err)
	os.Exit(1)
}