package hooks

import "testing"

func TestDenyBeatsAllow(t *testing.T) {
	b := New()
	b.On(func(Call) Outcome { return Outcome{Decision: Allow} })
	b.On(func(c Call) Outcome {
		if c.Event == PreToolUse {
			return Outcome{Decision: Deny, Reason: "no"}
		}
		return Outcome{}
	})
	out := b.Emit(Call{Event: PreToolUse, Tool: "write_file"})
	if out.Decision != Deny || out.Reason != "no" {
		t.Fatalf("%+v", out)
	}
}

func TestAdaptBefore(t *testing.T) {
	h := AdaptBefore(func(name, args string) error {
		if name == "write_file" {
			return errString("blocked")
		}
		return nil
	})
	if h(Call{Event: PreToolUse, Tool: "read_file"}).Decision != Allow {
		t.Fatal("read")
	}
	if h(Call{Event: PreToolUse, Tool: "write_file"}).Decision != Deny {
		t.Fatal("write")
	}
	if h(Call{Event: Stop}).Decision != "" {
		t.Fatal("stop should be ignored")
	}
}

type errString string

func (e errString) Error() string { return string(e) }