metro-puzzle-jp/internal/game/scene_level.go

package game

import (
	"fmt"
	"image"
	"image/color"
	"math"
	"math/rand/v2"
	"path/filepath"
	"strings"

	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/vector"

	"gitea.brasse-pc.eu/brasse/metro-puzzle-jp/internal/lang"
	"gitea.brasse-pc.eu/brasse/metro-puzzle-jp/internal/level"
	"gitea.brasse-pc.eu/brasse/metro-puzzle-jp/internal/minigame"
	"gitea.brasse-pc.eu/brasse/metro-puzzle-jp/internal/rng"
	"gitea.brasse-pc.eu/brasse/metro-puzzle-jp/internal/sim"
)

// Hur länge tillfälliga meddelanden visas.
const (
	deniedShowSec     = 2.0
	learnedShowSec    = 3.0
	progressedShowSec = 2.5
	flashShowSec      = 2.5
)

// LevelScene är själva spelandet av en bana. All spellogik ligger i sim.Run;
// scenen översätter input och ritar.
type LevelScene struct {
	id      string
	run     *sim.Run
	cam     *sim.Camera
	animT   float64
	hideMap bool // M döljer/visar minikartan

	shop    *shop        // öppen butik i kiosken (pausar banan)
	outcome LevelOutcome // progression från banan (fylls i när den avgjorts)

	// Tåg och effekter (M7b).
	tracks    []trackInfo
	rails     map[level.Point]bool
	lastPhase map[level.Tile]level.Phase
	particles []particle
	rng       *rand.Rand // bara för partiklar (ingen spellogik)
}

// NewLevelScene laddar banan och ställer spelaren på startrutan. Kunskap,
// plånbok, debuffar, skills och items tas från Game; seed styr slumpen.
func NewLevelScene(g *Game, id string, seed rng.Seed) (*LevelScene, error) {
	a := g.Assets
	lvl, err := level.LoadFile(filepath.Join(a.LevelsDir, id+".json"))
	if err != nil {
		return nil, err
	}
	s := &LevelScene{
		id:  id,
		run: sim.NewRun(lvl, g.runOptions(id, seed)),
		cam: sim.NewCamera(ScreenW, ScreenH, float64(lvl.Width()*TileSize), float64(lvl.Height()*TileSize)),
	}
	s.cam.Margin = TileSize // rälsen ligger i kantraden: visa en ruta utanför kartan
	s.lastPhase = map[level.Tile]level.Phase{}
	s.rng = rand.New(rand.NewPCG(1, 2))
	s.buildTracks()
	for _, tr := range s.tracks { // ingen melodi för fasen banan råkar börja i
		s.lastPhase[tr.tile], _ = s.run.PlatformPhase(tr.tile)
	}
	s.followPlayer()
	return s, nil
}

// TrackPhaseName är fasen för närmaste perrong inom indikatoravståndet
// (skriptläget), "" om ingen är nära.
func (s *LevelScene) TrackPhaseName() string {
	_, _, phase, _, _, ok := s.run.NearTrack(indicatorDist)
	if !ok {
		return ""
	}
	return phase.String()
}

// PlayerTile returnerar rutan spelaren står på/lämnar (används av skriptläget).
func (s *LevelScene) PlayerTile() level.Point { return s.run.Player.Tile }

// PlayerMoving rapporterar om spelaren är mellan två rutor (skriptläget).
func (s *LevelScene) PlayerMoving() bool { return s.run.Player.Moving() }

// TrainHere rapporterar om spelaren står på en perrong vars tåg är inne (skriptläget).
func (s *LevelScene) TrainHere() bool {
	tr, at, _ := s.run.PlatformHere()
	return tr != nil && at
}

// RideAtDest rapporterar om tågresan står vid resmålet (skriptläget). Utan
// pågående resa: true, så att skriptet inte hänger.
func (s *LevelScene) RideAtDest() bool {
	g, ok := s.run.Mini.(*minigame.Ride)
	return !ok || g.Index == g.Dest
}

func (s *LevelScene) followPlayer() {
	x, y := s.run.Player.WorldPos(TileSize)
	s.cam.Follow(x+TileSize/2, y+TileSize/2)
}

func (s *LevelScene) Update(g *Game) error {
	if s.shop != nil { // butiken pausar banan
		s.updateShop(g)
		return nil
	}
	s.updateEffects(g)
	if s.run.Mini != nil {
		// Minispel: all input går dit; Esc avbryter minispelet, inte banan.
		mx, my := miniMoveXY()
		s.run.StepMini(dt, minigame.Input{Move: my, MoveX: mx, Confirm: confirmJustPressed(), Hold: confirmHeld(), Cancel: backJustPressed()})
		if s.run.Outcome != sim.Ongoing {
			s.outcome = g.levelEnded(s.run, s.id)
			g.SetScene(NewResultScene(s))
		}
		return nil
	}
	if backJustPressed() {
		g.SetScene(NewMapScene(g))
		return nil
	}
	if shopJustPressed() && !s.run.Player.Moving() && s.run.Level.At(s.run.Player.Tile.X, s.run.Player.Tile.Y) == level.Kiosk {
		s.openShop(g)
		return nil
	}
	if helpJustPressed() {
		s.run.AskHelp()
	}
	if mapJustPressed() {
		s.hideMap = !s.hideMap
	}
	s.run.Step(dt, dirInput(), confirmJustPressed())
	if s.run.Player.Moving() {
		s.animT += dt
	} else {
		s.animT = 0
	}
	s.followPlayer()
	if s.run.Outcome != sim.Ongoing {
		s.outcome = g.levelEnded(s.run, s.id)
		g.SetScene(NewResultScene(s))
	}
	return nil
}

// MiniPick flyttar markören i det pågående minispelet ett steg mot
// alternativet med texten text; true när det är valt (skriptläget).
func (s *LevelScene) MiniPick(text string) bool {
	switch m := s.run.Mini.(type) {
	case *minigame.Ticket:
		if m.Stage == minigame.TicketPickDest {
			if m.Options[m.Cursor].Dest == text {
				return true
			}
			s.run.StepMini(0, minigame.Input{Move: 1})
			return false
		}
	case *minigame.TopUp:
		switch m.Stage {
		case minigame.TopUpPickMember:
			if m.Members[m.Cursor] == text {
				return true
			}
			s.run.StepMini(0, minigame.Input{Move: 1})
			return false
		case minigame.TopUpPickButton:
			if m.Buttons[m.Cursor] == text {
				return true
			}
			s.run.StepMini(0, minigame.Input{MoveX: 1})
			return false
		}
	}
	return true
}

func (s *LevelScene) Draw(g *Game, screen *ebiten.Image) {
	screen.Fill(color.RGBA{24, 20, 37, 255})
	lvl := s.run.Level
	ox, oy := s.cam.Offset()
	ox, oy = math.Round(ox), math.Round(oy)

	// Rita bara rutor som syns.
	x0 := max(0, int(s.cam.X)/TileSize)
	y0 := max(0, int(s.cam.Y)/TileSize)
	x1 := min(lvl.Width(), int(s.cam.X+ScreenW)/TileSize+2)
	y1 := min(lvl.Height(), int(s.cam.Y+ScreenH)/TileSize+2)
	var op ebiten.DrawImageOptions
	for y := y0; y < y1; y++ {
		for x := x0; x < x1; x++ {
			if s.rails[level.Point{X: x, Y: y}] {
				s.drawRails(g, screen, level.Point{X: x, Y: y}, ox, oy)
				continue
			}
			op.GeoM.Reset()
			op.GeoM.Translate(ox+float64(x*TileSize), oy+float64(y*TileSize))
			screen.DrawImage(g.Assets.Tiles[lvl.At(x, y)], &op)
		}
	}
	s.drawTrains(g, screen, ox, oy)
	s.drawParticles(screen, ox, oy)

	// Följarna ritas bakifrån så att ledaren hamnar överst.
	leader := s.run.Player
	followers := s.run.Party.Followers()
	for i := len(followers); i >= 1; i-- {
		from, to := s.run.Party.FollowerTiles(i)
		fx := float64(from.X*TileSize) + float64((to.X-from.X)*TileSize)*leader.Progress
		fy := float64(from.Y*TileSize) + float64((to.Y-from.Y)*TileSize)*leader.Progress
		facing := sim.Down
		switch {
		case to.X > from.X:
			facing = sim.Right
		case to.X < from.X:
			facing = sim.Left
		case to.Y < from.Y:
			facing = sim.Up
		}
		op.GeoM.Reset()
		op.GeoM.Translate(ox+math.Round(fx), oy+math.Round(fy))
		op.ColorScale.Reset()
		t := memberTints[i%len(memberTints)]
		op.ColorScale.Scale(t[0], t[1], t[2], 1)
		screen.DrawImage(g.Assets.PlayerFrame(facing, leader.Moving() && from != to, s.animT), &op)
		op.ColorScale.Reset()
		s.drawUrge(g, screen, followers[i-1], int(ox+math.Round(fx)), int(oy+math.Round(fy)))
	}

	px, py := leader.WorldPos(TileSize)
	op.GeoM.Reset()
	op.GeoM.Translate(ox+math.Round(px), oy+math.Round(py))
	tint := g.Effects().Tint
	op.ColorScale.Reset()
	op.ColorScale.Scale(tint[0], tint[1], tint[2], 1)
	screen.DrawImage(g.Assets.PlayerFrame(leader.Facing, leader.Moving(), s.animT), &op)
	op.ColorScale.Reset()
	s.drawUrge(g, screen, s.run.Party.Members[0], int(ox+math.Round(px)), int(oy+math.Round(py)))
	s.drawIndicator(screen, ox, oy)

	s.drawHUD(g, screen)
	if s.run.Mini != nil {
		s.drawMinigame(g, screen)
	}
	if s.shop != nil {
		s.drawShop(g, screen)
	}
}

// memberTints färgar följarnas sprites tills de har egna.
var memberTints = [][3]float32{{1, 1, 1}, {1, 0.75, 0.55}, {0.7, 0.95, 0.75}, {0.8, 0.7, 1}, {1, 0.95, 0.55}}

// urgeMark är tecknet som visas över huvudet på någon med ett behov.
func urgeMark(u sim.Urge) (string, color.Color) {
	switch u {
	case sim.NeedToilet:
		return "WC", colBad
	case sim.Thirsty:
		return "飲", colEnglish
	case sim.Hungry:
		return "食", colWarn
	case sim.Distracted:
		return "?", colDim
	}
	return "", nil
}

func (s *LevelScene) drawUrge(g *Game, screen *ebiten.Image, m *sim.Member, x, y int) {
	mark, col := urgeMark(m.Urge)
	if mark == "" {
		if m.Meters.Min() <= 0 {
			mark, col = "!!", colBad
		} else {
			return
		}
	}
	w := g.Assets.Width(mark)
	vector.DrawFilledRect(screen, float32(x+8-w/2-1), float32(y-11), float32(w+2), 11, colPanel, false)
	g.Assets.Draw(screen, mark, x+8-w/2, y-12, col)
}

// drawHUD ritar den övre raden (bana, resmål, tid, kort, japanska-nivå) och
// inforutan (perrong, skylt, nekad spärr, nytt ord).
func (s *LevelScene) drawHUD(g *Game, screen *ebiten.Image) {
	r := s.run
	a := g.Assets
	vector.DrawFilledRect(screen, 0, 0, ScreenW, 24, color.RGBA{24, 20, 37, 200}, false)

	dest := r.Level.Destination.Get("romaji")
	if r.Know.ShowsDestinationJP() { // hint från nivå 1: resmålet på japanska, att matcha mot skyltarna
		dest += "  " + r.Level.Destination.Get("ja")
	}
	name := r.Level.Name.Get(UILang)
	a.Draw(screen, name, 4, 0, colText)
	destX := 4 + a.Width(name) + 12
	a.Draw(screen, a.T("hud.destination")+": "+dest, destX, 0, colKnown)
	a.Draw(screen, fmt.Sprintf("%s Lv%d·%d", a.T("hud.japanese"), r.Know.Level(), r.Know.Count()),
		destX+a.Width(a.T("hud.destination")+": "+dest)+12, 0, colDim)
	timeStr := fmt.Sprintf("%s %3.0fs", a.T("hud.time"), r.Time)
	if r.Level.TimeLimitSec > 0 {
		left := r.TimeLeft()
		timeStr = fmt.Sprintf("%s %d:%02d", a.T("hud.time_left"), int(left)/60, int(left)%60)
	}
	wallet := fmt.Sprintf("%s  %s %d¥  %s %d¥", timeStr, a.T("hud.card"), r.Wallet.Card, a.T("hud.cash_short"), r.Wallet.Cash)
	if r.Level.MaxMissedTrains > 0 {
		wallet += fmt.Sprintf("  %s %d/%d", a.T("hud.missed_short"), r.MissedTrains, r.Level.MaxMissedTrains)
	}
	if r.Wallet.Phone {
		wallet += fmt.Sprintf("  %s %.0f%%", a.T("hud.phone"), r.Wallet.Battery)
	}
	if r.Wallet.Ticket != "" {
		wallet += "  " + a.T("hud.ticket") + " " + r.Wallet.Ticket
	}
	walletCol := colDim
	if r.Level.TimeLimitSec > 0 && r.TimeLeft() < 30 {
		walletCol = colBad
	}
	a.Draw(screen, wallet, 4, LineH, walletCol)
	s.drawMeters(g, screen)

	if r.Outcome != sim.Ongoing || r.Mini != nil || s.shop != nil {
		return // resultatpanelen, minispelet eller butiken tar över; ingen inforuta eller minikarta
	}
	lines, accent, bar := s.infoLines(a)
	if entry := a.Dict.Lookup(r.Learned); entry != nil && r.Time-r.LearnedAt < learnedShowSec {
		lines = append(lines, plainLine(fmt.Sprintf("%s: %s = %s (%s)", a.T("hud.learned"), r.Learned,
			entry.Translation(UILang), entry.Romaji), colKnown))
	}
	if len(r.Progressed) > 0 && r.Time-r.ProgressedAt < progressedShowSec {
		lines = append(lines, a.wrapLine(plainLine(a.T("hud.progress")+": "+strings.Join(r.Progressed, ", "), colWarn), ScreenW-8)...)
	}
	if urges := r.Party.Urges(); len(urges) > 0 {
		var parts []string
		for _, m := range urges {
			parts = append(parts, m.Name+": "+a.T("urge."+m.Urge.String()))
		}
		lines = append(lines, a.wrapLine(plainLine(strings.Join(parts, "   "), colWarn), ScreenW-8)...)
	}
	if r.Flashing(flashShowSec) {
		col := colBad
		if r.FlashKey == sim.FlashRescan {
			col = colWarn
		}
		lines = append(lines, a.wrapLine(plainLine(a.T(r.FlashKey), col), ScreenW-8)...)
	}
	if debuffs := g.Profile.Debuffs; len(debuffs) > 0 && r.Time < 6 {
		var parts []string
		for _, d := range debuffs {
			parts = append(parts, fmt.Sprintf("%s (%d)", a.T("debuff."+string(d.Kind)), d.LevelsLeft))
		}
		lines = append(lines, a.wrapLine(plainLine(a.T("hud.debuffs")+": "+strings.Join(parts, ", "), colBad), ScreenW-8)...)
	}

	// Inforutans läge: nederkant, men flyttas upp under HUD:en om spelaren
	// (eller tåget under hen) annars skulle hamna bakom den.
	var box image.Rectangle
	hasBox := len(lines) > 0
	if hasBox {
		h := 8 + LineH*len(lines)
		if bar {
			h += 8
		}
		_, py := r.Player.WorldPos(TileSize)
		y := ScreenH - h
		if int(py-s.cam.Y)+2*TileSize > y {
			y = 24
		}
		box = image.Rect(0, y, ScreenW, y+h)
	}
	if !s.hideMap {
		s.drawMinimap(g, screen, box, hasBox)
	}
	if !hasBox {
		return
	}
	y, h := box.Min.Y, box.Dy()
	vector.DrawFilledRect(screen, 0, float32(y), ScreenW, float32(h), colPanel, false)
	vector.DrawFilledRect(screen, 0, float32(y), ScreenW, 2, accent, false)
	a.drawLines(screen, lines, 4, y+4)
	if bar {
		p := r.HelpProgress()
		if r.Facility.Active {
			p = r.FacilityProgress()
		}
		by := float32(y + h - 7)
		vector.DrawFilledRect(screen, 4, by, ScreenW-8, 4, colBar, false)
		vector.DrawFilledRect(screen, 4, by, float32((ScreenW-8)*p), 4, colKnown, false)
	}
}

// infoLines bygger inforutans rader: perronginfo, skylt eller nekad spärr.
func (s *LevelScene) infoLines(a *Assets) (lines []line, accent color.Color, bar bool) {
	r := s.run
	lvl := r.Level
	tile := r.Player.Tile
	accent = colBar
	maxW := ScreenW - 8
	english := lang.ShowEnglish(lvl.ID, tile.X, tile.Y, lvl.Difficulty)

	if tr, at, secs := r.PlatformHere(); tr != nil {
		// Avgångstavlan är en skylt som alla andra: japanska, sedd genom kunskapen.
		rd := lang.Render(a.Dict, r.Know, tr.BoardText(), UILang)
		lines = append(lines, a.wrapLine(shownLine(rd.Original, colText, r.Know.ShowsReadings()), maxW)...)
		lines = append(lines, a.wrapLine(shownLine(rd.Partial, colText, false), maxW)...)
		if english {
			lines = append(lines, a.wrapLine(plainLine(fmt.Sprintf("%s: Track %s  %s for %s", a.T("hud.english"), tr.Track,
				tr.Line.Get("en"), tr.Destination.Get("en")), colEnglish), maxW)...)
		}
		phase, _ := r.PlatformPhase(lvl.At(tile.X, tile.Y))
		switch {
		case phase == level.Closing:
			accent = colWarn
			lines = append(lines, plainLine(fmt.Sprintf("%s  %.0f s", a.T("hud.closing"), math.Ceil(secs)), colWarn))
		case at:
			accent = colGood
			lines = append(lines, plainLine(fmt.Sprintf("%s %.0f s     %s", a.T("hud.departs_in"), math.Ceil(secs), a.T("hud.board")), colGood))
		case phase == level.Arriving:
			accent = colWarn
			lines = append(lines, plainLine(a.T("hud.arriving"), colWarn))
		case phase == level.Approaching:
			accent = colWarn
			lines = append(lines, plainLine(fmt.Sprintf(a.T("hud.approaching"), math.Ceil(secs)), colWarn))
		case phase == level.Leaving:
			lines = append(lines, plainLine(fmt.Sprintf("%s   %s %.0f s", a.T("hud.leaving"), a.T("hud.next_train_in"), math.Ceil(secs)), colDim))
		default:
			accent = colWarn
			lines = append(lines, plainLine(fmt.Sprintf("%s %.0f s", a.T("hud.next_train_in"), math.Ceil(secs)), colWarn))
		}
		return lines, accent, false
	}
	// Nära rälsen (men inte på perrongen): man ser och hör tåget komma.
	if _, _, phase, _, dist, ok := r.NearTrack(indicatorDist); ok && dist > 0 && phase == level.Approaching && r.SignHere() == nil {
		return []line{plainLine(a.T("hud.train_near"), colWarn)}, colWarn, false
	}

	if sg := r.SignHere(); sg != nil {
		know := r.Know
		revealed := r.SignRevealed(tile)
		if revealed {
			know = nil // allt känt
			accent = colKnown
		}
		rd := lang.Render(a.Dict, know, sg.Text["ja"], UILang)
		lines = append(lines, a.wrapLine(shownLine(rd.Original, colText, r.Know.ShowsReadings()), maxW)...)
		lines = append(lines, a.wrapLine(shownLine(rd.Partial, colText, false), maxW)...)
		if english {
			lines = append(lines, a.wrapLine(plainLine(a.T("hud.english")+": "+sg.Text.Get("en"), colEnglish), maxW)...)
		}
		switch {
		case r.Help.Active:
			lines = append(lines, plainLine(a.T("hud.help_progress"), colDim))
			bar = true
		case !revealed:
			lines = append(lines, plainLine(fmt.Sprintf(a.T("hud.help_prompt"), lang.HelpSeconds(r.Know.Level())), colDim))
		}
		return lines, accent, bar
	}

	switch lvl.At(tile.X, tile.Y) {
	case level.Toilet:
		if r.Facility.Active {
			return []line{plainLine(a.T("hud.toilet_busy"), colDim)}, colGood, true
		}
		if n := len(r.Party.NeedsToilet()); n > 0 {
			return []line{plainLine(fmt.Sprintf(a.T("hud.toilet_prompt"), n, sim.ToiletSecPerMember*float64(n)), colGood)}, colGood, false
		}
		return []line{plainLine(a.T("hud.toilet_none"), colDim)}, accent, false
	case level.Kiosk:
		if n := len(r.Party.NeedsKiosk()); n > 0 {
			return []line{plainLine(fmt.Sprintf(a.T("hud.kiosk_prompt"), n, sim.KioskPriceYen*n)+"   "+a.T("hud.shop_prompt"), colGood)}, colGood, false
		}
		return []line{plainLine(a.T("hud.kiosk_none")+"   "+a.T("hud.shop_prompt"), colDim)}, accent, false
	case level.TicketMachine:
		if lvl.TicketRequired {
			return []line{plainLine(fmt.Sprintf(a.T("hud.machine_ticket"), r.Wallet.Cash), colGood)}, colGood, false
		}
		return []line{plainLine(fmt.Sprintf(a.T("hud.machine_topup"), r.Wallet.Card, r.Wallet.Cash), colGood)}, colGood, false
	}
	if r.DeniedAt >= 0 && r.Time-r.DeniedAt < deniedShowSec {
		key := "hud.gate_denied"
		switch {
		case lvl.TicketRequired && r.Wallet.Ticket == "":
			key = sim.FlashNoTicket
		case lvl.TicketRequired:
			key = "hud.need_all_tickets"
		case r.Wallet.Phone && r.Wallet.Battery <= 0:
			key = "hud.phone_dead"
		case len(r.MembersWithoutFare()) > 0:
			var names []string
			for _, m := range r.MembersWithoutFare() {
				names = append(names, m.Name)
			}
			return []line{plainLine(fmt.Sprintf(a.T(sim.FlashNoCards), strings.Join(names, ", ")), colBad)}, colBad, false
		}
		return []line{plainLine(a.T(key), colBad)}, colBad, false
	}
	return nil, accent, false
}

// drawMeters ritar sällskapets mat/dryck/toa-mätare uppe till höger.
func (s *LevelScene) drawMeters(g *Game, screen *ebiten.Image) {
	members := s.run.Party.Members
	const w, gap = 11, 3
	x0 := ScreenW - 4 - len(members)*(w+gap)
	for i, m := range members {
		x := float32(x0 + i*(w+gap))
		g.Assets.Draw(screen, string([]rune(m.Name)[:1]), int(x)+2, 0, colDim)
		for j, v := range []struct {
			val float64
			col color.Color
		}{{m.Meters.Food, colWarn}, {m.Meters.Drink, colEnglish}, {m.Meters.Toilet, colGood}} {
			y := float32(13 + j*3)
			vector.DrawFilledRect(screen, x, y, w, 2, colBar, false)
			c := v.col
			if v.val < sim.UrgeThreshold {
				c = colBad
			}
			vector.DrawFilledRect(screen, x, y, float32(w*v.val/100), 2, c, false)
		}
	}
}