package core

import (
	"github.com/bnema/neferwl/internal/ports"
	"testing"
)

func TestOverviewCascadeBandGeometry(t *testing.T) {
	w := cascadeWorkspace(7)
	tiles, p := w.previewTiles()
	if p.bounds.W != w.Usable.W || p.bounds.H != 3*w.Usable.H {
		t.Fatalf("bounds=%v", p.bounds)
	}
	for i, tile := range tiles {
		if tile.Rect.X != w.cellX(i) || tile.Rect.Y != w.gap()+w.band(i)*w.Usable.H {
			t.Fatalf("tile %d=%v", i, tile.Rect)
		}
	}
}

func TestOverviewCascadePreviewBufferAllocations(t *testing.T) {
	w := cascadeWorkspace(7)
	buf, _ := w.previewTiles()
	if n := testing.AllocsPerRun(100, func() { buf, _ = w.previewTilesInto(buf[:0]) }); n != 0 {
		t.Fatalf("allocations=%v", n)
	}
}

func TestOverviewMixedLayoutGestureAndCancel(t *testing.T) {
	m := overviewMonitor()
	m.SetOverflow(OverflowFixed)
	m.Current().Overflow = OverflowCascade
	from := m.Current()
	m.ToggleOverview()
	rows, _ := m.overviewRows()
	if rows[m.Workspaces[1]].X <= 0 {
		t.Fatal("cascade neighbor not horizontal")
	}
	m.overviewScroll(ports.PointerAxis{Source: ports.AxisFinger, Horizontal: ports.ScrollAxis{Set: true, Value: overviewScrollStep}})
	if m.Current() == from {
		t.Fatal("horizontal gesture did not change workspace")
	}
	if m.Current().Overflow != OverflowFixed {
		t.Fatal("destination lost fixed policy")
	}
	m.CancelOverview()
	if m.Current() != from {
		t.Fatal("cancel lost source workspace")
	}
}

func TestOverviewCascadeReloadRetainsSelection(t *testing.T) {
	m := overviewMonitor()
	m.ToggleOverview()
	w := m.Current()
	id, _ := w.Focused()
	m.SetOverflow(OverflowCascade)
	if got, _ := w.Focused(); !m.ov.open || got != id {
		t.Fatal("reload lost overview selection")
	}
	m.CancelOverview()
	if got, _ := w.Focused(); got != id {
		t.Fatal("cancel lost original focus")
	}
}

func TestOverviewMixedWheelDoesNotBounce(t *testing.T) {
	for _, source := range []ports.AxisSource{ports.AxisWheel, ports.AxisContinuous} {
		m := overviewMonitor()
		m.SetOverflow(OverflowFixed)
		m.Workspaces[1].Overflow = OverflowCascade
		m.ToggleOverview()
		from := m.Current()
		m.overviewScroll(ports.PointerAxis{Source: source, Vertical: ports.ScrollAxis{Set: true, Value: overviewScrollStep, V120: 120}})
		if m.Current() == from {
			t.Fatalf("source %v bounced", source)
		}
	}
}

func TestOverviewCascadeStashScale(t *testing.T) {
	w := cascadeWorkspace(7)
	w.Stash = []Float{{ID: 20}}
	cards := w.pile(0, false, 0)
	if len(cards) != 1 || cards[0].Preview != overviewCardZoom {
		t.Fatalf("cards=%v", cards)
	}
	if w.pileWidth() > w.overviewArea().W/3 {
		t.Fatal("stash exceeds width budget")
	}
}