package area

import "testing"

func TestGeometryValidation(t *testing.T) {
	tests := []struct {
		name      string
		kind      string
		direction string
		points    []Point
		valid     bool
	}{
		{"polygon", KindPolygon, "", []Point{{0.1, 0.1}, {0.8, 0.1}, {0.5, 0.8}}, true},
		{"self intersecting", KindPolygon, "", []Point{{0.1, 0.1}, {0.8, 0.8}, {0.8, 0.1}, {0.1, 0.8}}, false},
		{"outside", KindPolygon, "", []Point{{-0.1, 0.1}, {0.8, 0.1}, {0.5, 0.8}}, false},
		{"line", KindDirectionLine, DirectionForward, []Point{{0.2, 0.5}, {0.8, 0.5}}, true},
		{"line missing direction", KindDirectionLine, "", []Point{{0.2, 0.5}, {0.8, 0.5}}, false},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			err := validateGeometry(test.kind, test.direction, test.points)
			if (err == nil) != test.valid {
				t.Fatalf("valid=%v err=%v", test.valid, err)
			}
		})
	}
}