package agents

import (
	"context"
	"log/slog"
)

const abandonedMergeText = "The Merge turn ended unfinished (interrupted, failed to start, or with no final message), so byre didn't squash or push the task. Merge again to retry."

func (m *Manager) poke() {
	select {
	case m.pokes <- struct{}{}:
	default:
	}
}

func (m *Manager) coordinate() {
	started := map[string]bool{}
	for {
		select {
		case <-m.watchStop:
			return
		case <-m.pokes:
			m.coordinatePass(context.Background(), started)
		}
	}
}

func (m *Manager) coordinatePass(ctx context.Context, started map[string]bool) {
	work, err := m.store.Coordinate(ctx)
	if err != nil {
		slog.Error("coordinate", "err", err)
		return
	}
	for _, id := range work.AbandonedMerges {
		slog.Info("merge turn ended unfinished", "task", id)
		m.fileError(ctx, id, abandonedMergeText)
		m.deliverIdle(ctx, id)
	}
	for _, c := range work.StartMerges {
		m.startClaimedMerge(ctx, c)
	}
	for _, id := range work.StartDiscards {
		m.startDiscard(ctx, id)
	}

	current := map[string]bool{}
	once := func(key string, run func()) {
		current[key] = true
		if started[key] {
			return
		}
		started[key] = true
		go run()
	}
	for _, f := range work.FinalizeMerges {
		once("merge:"+f.Task.Id, func() { m.finalizeMerge(f) })
	}
	for _, id := range work.FinishDiscards {
		once("discard:"+id, func() { m.finishDiscard(id) })
	}
	for key := range started {
		if !current[key] {
			delete(started, key)
		}
	}
}