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() {
	finalizing := map[string]bool{}
	for {
		select {
		case <-m.watchStop:
			return
		case <-m.pokes:
			m.coordinateMerges(context.Background(), finalizing)
		}
	}
}

func (m *Manager) coordinateMerges(ctx context.Context, finalizing map[string]bool) {
	work, err := m.store.CoordinateMerges(ctx)
	if err != nil {
		slog.Error("coordinate merges", "err", err)
		return
	}
	for _, id := range work.Abandoned {
		slog.Info("merge turn ended unfinished", "task", id)
		m.fileError(ctx, id, abandonedMergeText)
		m.deliverIdle(ctx, id)
	}
	for _, c := range work.Start {
		m.startClaimedMerge(ctx, c)
	}
	current := map[string]bool{}
	for _, f := range work.Finalize {
		current[f.Task.Id] = true
		if finalizing[f.Task.Id] {
			continue
		}
		finalizing[f.Task.Id] = true
		go m.finalizeMerge(f)
	}
	for id := range finalizing {
		if !current[id] {
			delete(finalizing, id)
		}
	}
}