package campaign

import (
	"fmt"

	"gitea.reground.org/will/eec-campaigns/internal/listmonk"
)

// Send transitions a campaign from draft/paused to running — the one real
// send trigger in this whole tool (see cmd/send, triggered only by a pushed
// send/<slug> git tag or a manual workflow_dispatch, never by a plain
// sync). The campaign is looked up fresh by name each call, so this always
// acts on listmonk's current live state, not whatever sync last saw.
func Send(lm *listmonk.Client, slug string) (*listmonk.Campaign, error) {
	camp, err := lm.FindCampaignByName(slug)
	if err != nil {
		return nil, err
	}
	if camp == nil {
		return nil, fmt.Errorf("no campaign named %q in listmonk — run sync first", slug)
	}
	if camp.Status != "draft" && camp.Status != "paused" {
		return nil, fmt.Errorf("campaign %q is %s in listmonk — only draft or paused campaigns can be sent", slug, camp.Status)
	}
	if err := lm.SetCampaignStatus(camp.ID, "running"); err != nil {
		return nil, err
	}
	return camp, nil
}

// Test sends a preview of a campaign's current content to the given
// addresses without touching its status — the same mechanism sync's
// automatic preview uses, exposed standalone for on-demand re-previews.
func Test(lm *listmonk.Client, slug string, emails []string) error {
	camp, err := lm.FindCampaignByName(slug)
	if err != nil {
		return err
	}
	if camp == nil {
		return fmt.Errorf("no campaign named %q in listmonk — run sync first", slug)
	}
	return lm.TestCampaign(camp.ID, emails)
}