package game

// Regression: credit pickups must never destroy value at the economy cap.
// Only the balance headroom below casino.MaxCredits may be removed from the
// ground; the remainder stays there. The previous code removed the whole
// ground stack and then let grantCredits clamp the excess away.

import (
	"strings"
	"testing"

	"thehouseoficarus/internal/casino"
	"thehouseoficarus/internal/net"
)

func TestPickupCreditsAtCapLeavesRemainderOnGround(t *testing.T) {
	h := newHarness(t)
	h.seedAccount("alice")
	p := h.seedCharacter("alice", "alice")
	h.g.RunOnOwner(func() {
		p.Credits = casino.MaxCredits - 5
		h.g.World.AddGroundItem(p.RoomID, "credits", 20)
		sess := &net.Session{Conn: newChanConn(), Player: p}
		sess.SetState(net.StateGame)

		h.g.pickupCredits(sess, p, "credits", 0)

		if p.Credits != casino.MaxCredits {
			t.Errorf("balance = %d, want the cap %d", p.Credits, casino.MaxCredits)
		}
		if got := h.g.World.GroundItems(p.RoomID)["credits"]; got != 15 {
			t.Errorf("ground credits = %d, want 15 left behind", got)
		}
	})
}

func TestPickupCreditsAtCapDestroysNothing(t *testing.T) {
	h := newHarness(t)
	h.seedAccount("alice")
	p := h.seedCharacter("alice", "alice")
	h.g.RunOnOwner(func() {
		p.Credits = casino.MaxCredits
		h.g.World.AddGroundItem(p.RoomID, "credits", 20)
		sess := &net.Session{Conn: newChanConn(), Player: p}
		sess.SetState(net.StateGame)

		h.g.pickupCredits(sess, p, "credits", 0)

		if p.Credits != casino.MaxCredits {
			t.Errorf("balance = %d, want the cap %d", p.Credits, casino.MaxCredits)
		}
		if got := h.g.World.GroundItems(p.RoomID)["credits"]; got != 20 {
			t.Errorf("ground credits = %d, want the full stack to survive", got)
		}
		if out := string(sess.Conn.(*chanConn).Bytes()); !strings.Contains(out, "can't hold any more credits") {
			t.Errorf("expected a cap message, got %q", out)
		}
	})
}

func TestGetAllCreditsAtCapLeavesRemainderOnGround(t *testing.T) {
	h := newHarness(t)
	h.seedAccount("alice")
	p := h.seedCharacter("alice", "alice")
	h.g.RunOnOwner(func() {
		p.Credits = casino.MaxCredits - 5
		h.g.World.AddGroundItem(p.RoomID, "credits", 20)
		sess := &net.Session{Conn: newChanConn(), Player: p}
		sess.SetState(net.StateGame)

		h.g.doGetAll(sess)

		if p.Credits != casino.MaxCredits {
			t.Errorf("balance = %d, want the cap %d", p.Credits, casino.MaxCredits)
		}
		if got := h.g.World.GroundItems(p.RoomID)["credits"]; got != 15 {
			t.Errorf("ground credits = %d, want 15 left behind", got)
		}
	})
}

func TestGetAllCreditsAtCapReportsShortfall(t *testing.T) {
	h := newHarness(t)
	h.seedAccount("alice")
	p := h.seedCharacter("alice", "alice")
	h.g.RunOnOwner(func() {
		p.Credits = casino.MaxCredits
		h.g.World.AddGroundItem(p.RoomID, "credits", 20)
		sess := &net.Session{Conn: newChanConn(), Player: p}
		sess.SetState(net.StateGame)

		h.g.doGetAll(sess)

		if got := h.g.World.GroundItems(p.RoomID)["credits"]; got != 20 {
			t.Errorf("ground credits = %d, want the full stack to survive", got)
		}
		out := string(sess.Conn.(*chanConn).Bytes())
		if !strings.Contains(out, "can't hold any more credits") {
			t.Errorf("expected a cap message, got %q", out)
		}
		if strings.Contains(out, "inventory is full") {
			t.Errorf("cap shortfall misreported as a full inventory: %q", out)
		}
	})
}