package main

import (
	"testing"

	"github.com/novox/mesh-controller/internal/catalogue"
	"github.com/novox/mesh-controller/internal/inventory"
	"github.com/novox/mesh-controller/internal/link"
)

func claiming(module, seat string, on ...string) inventory.Entry {
	return inventory.Entry{
		Manifest: catalogue.Manifest{Module: module, Claims: []catalogue.Claim{{Name: seat}}},
		On:       on,
	}
}

// The controller asks the build role that has a holder (novox/hq ADR 0190 handover): the retired
// one while only the builder is assigned, the current one from the first build-agent on, and the
// current one when nothing holds either — where every ask goes once the handover is done.
func TestTheControllerAsksTheBuildRoleThatHasAHolder(t *testing.T) {
	onlyTheBuilder := []inventory.Entry{
		claiming("builder", link.TheBuildMachineBefore, "anchor"),
		claiming("build-agent", link.TheBuildMachine), // registered, assigned nowhere yet
	}
	if got := buildSeatAmong(onlyTheBuilder); got != link.TheBuildMachineBefore {
		t.Errorf("with only the builder assigned, asked %q", got)
	}
	bothHeld := []inventory.Entry{
		claiming("builder", link.TheBuildMachineBefore, "anchor"),
		claiming("build-agent", link.TheBuildMachine, "home-server"),
	}
	if got := buildSeatAmong(bothHeld); got != link.TheBuildMachine {
		t.Errorf("with a build-agent assigned anywhere, asked %q", got)
	}
	neither := []inventory.Entry{claiming("builder", link.TheBuildMachineBefore)}
	if got := buildSeatAmong(neither); got != link.TheBuildMachine {
		t.Errorf("with no holder of either, asked %q, want the current role", got)
	}
	if got := buildSeatAmong(nil); got != link.TheBuildMachine {
		t.Errorf("an empty catalogue asks %q", got)
	}
}