package main

import (
	"math"
	"testing"
	"time"
)

func TestTicketSingleUse(t *testing.T) {
	store := newTicketStore()
	value, err := store.issue("player-1", "Dave")
	if err != nil {
		t.Fatal(err)
	}
	if item, ok := store.consume(value); !ok || item.Subject != "player-1" {
		t.Fatalf("first consume failed: %#v %v", item, ok)
	}
	if _, ok := store.consume(value); ok {
		t.Fatal("ticket must be one-time")
	}
}

func TestTransformSanitizers(t *testing.T) {
	if got := clampFloat(-5, 0, worldSize); got != 0 {
		t.Fatalf("clamp low=%v", got)
	}
	if got := clampFloat(4000, 0, worldSize); got != worldSize {
		t.Fatalf("clamp high=%v", got)
	}
	if got := clampFloat(math.NaN(), 0, worldSize); got != 0 {
		t.Fatalf("nan=%v", got)
	}
	if got := normalizeAngle(-90); got != 270 {
		t.Fatalf("angle=%v", got)
	}
}

func TestAudienceMatch(t *testing.T) {
	if !audienceMatches(claims{AuthorizedParty: "airship-web"}, "airship-web") {
		t.Fatal("azp should match")
	}
	if !audienceMatches(claims{Audience: []interface{}{"account", "airship-web"}}, "airship-web") {
		t.Fatal("aud should match")
	}
	if audienceMatches(claims{AuthorizedParty: "other"}, "airship-web") {
		t.Fatal("wrong client must not match")
	}
}

func TestServerMovementUsesInputNotClientTransform(t *testing.T) {
	state := newPlayerState("player-1", "Dave", 0, 0)
	startX, startY := state.X, state.Y
	input := inputState{Throttle: 1, Steer: 0.4, Seq: 7}
	now := time.Unix(100, 0)
	for i := 0; i < 30; i++ {
		stepPlayer(&state, input, now.Add(time.Duration(i)*simTick), simTick.Seconds())
	}
	if state.InputSeq != 7 {
		t.Fatalf("input seq=%d", state.InputSeq)
	}
	if state.Speed <= 0 || state.Speed > playerMaxSpeed {
		t.Fatalf("speed=%v", state.Speed)
	}
	if state.X == startX && state.Y == startY {
		t.Fatal("authoritative simulation did not move player")
	}
	if state.Angle == 0 {
		t.Fatal("steer input did not change angle")
	}
}

func TestDockedInputFreezesAuthoritativeShip(t *testing.T) {
	state := newPlayerState("player-1", "Dave", 0, 0)
	state.Speed = 150
	x, y := state.X, state.Y
	stepPlayer(&state, inputState{Docked: true, Seq: 1}, time.Now(), simTick.Seconds())
	if state.Speed != 0 || state.X != x || state.Y != y {
		t.Fatalf("docked ship moved: speed=%v x=%v y=%v", state.Speed, state.X, state.Y)
	}
}

func TestBroadsideSpawnsThreeServerProjectilesAndEnforcesReload(t *testing.T) {
	h := newHub("TEST")
	c := &client{state: newPlayerState("one", "One", 0, 0), lastFire: map[string]time.Time{}}
	h.clients[c.state.ID] = c
	now := time.Unix(100, 0)
	if !h.fire("one", "port", now) {
		t.Fatal("first fire should succeed")
	}
	if len(h.projectiles) != 3 {
		t.Fatalf("projectiles=%d", len(h.projectiles))
	}
	if h.fire("one", "port", now.Add(100*time.Millisecond)) {
		t.Fatal("reload should reject early second broadside")
	}
	if !h.fire("one", "port", now.Add(broadsideReload)) {
		t.Fatal("broadside should fire after reload")
	}
	if len(h.projectiles) != 6 {
		t.Fatalf("projectiles after reload=%d", len(h.projectiles))
	}
}

func TestServerProjectileAppliesDamageDeathAndKill(t *testing.T) {
	h := newHub("TEST")
	shooter := &client{state: newPlayerState("one", "One", 0, 0), lastFire: map[string]time.Time{}}
	target := &client{state: newPlayerState("two", "Two", 0, 0), lastFire: map[string]time.Time{}}
	shooter.state.X, shooter.state.Y = 1000, 1000
	target.state.X, target.state.Y = 1050, 1000
	target.state.Hull = shotDamage
	h.clients[shooter.state.ID] = shooter
	h.clients[target.state.ID] = target
	now := time.Unix(100, 0)
	h.projectiles["shot"] = projectileState{
		ID: "shot", OwnerID: shooter.state.ID, X: target.state.X, Y: target.state.Y,
		Damage: shotDamage, bornAt: now,
	}
	h.step(now.Add(simTick), simTick.Seconds())
	if target.state.Alive {
		t.Fatal("target should be dead")
	}
	if target.state.Deaths != 1 || shooter.state.Kills != 1 {
		t.Fatalf("kills/deaths=%d/%d", shooter.state.Kills, target.state.Deaths)
	}
	if target.state.LastKiller != "One" {
		t.Fatalf("killer=%q", target.state.LastKiller)
	}
	if _, ok := h.projectiles["shot"]; ok {
		t.Fatal("hit projectile should be removed")
	}
}

func TestServerRespawnsDestroyedPlayer(t *testing.T) {
	state := newPlayerState("player-1", "Dave", 0, 1)
	now := time.Unix(100, 0)
	state.Alive = false
	state.Hull = 0
	state.Speed = 120
	state.RespawnAt = now.Add(respawnDelay).UnixMilli()
	stepPlayer(&state, inputState{}, now.Add(respawnDelay+time.Millisecond), simTick.Seconds())
	if !state.Alive || state.Hull != playerMaxHull || state.Speed != 0 {
		t.Fatalf("bad respawn: %+v", state)
	}
}