package workbench

import (
	"context"
	"gorm.io/gorm"
)

func lockResourceForDeletion(ctx context.Context, tx *gorm.DB, kind, id string) (*Resource, error) {
	return lockResource(ctx, tx, kind, id)
}

// The caller holds both resource locks and has checked that the task is idle.
// Only references change; historical prose and import metadata are preserved.
func detachResourceForDeletion(ctx context.Context, tx *gorm.DB, parent, task *Resource) error {
	tenant, actor, admin, err := identity(ctx)
	if err != nil {
		return err
	}
	if parent.TenantID != tenant || task.TenantID != tenant || task.Kind != "content-tasks" {
		return ErrForbidden
	}
	if !admin && (parent.OwnerID != actor || task.OwnerID != actor) {
		return ErrForbidden
	}
	d, err := decode[TaskData](task.Data)
	if err != nil {
		return ErrInvalid
	}
	if (parent.Kind != "flows" || d.FlowID != parent.ID) && (parent.Kind != "training-maps" || d.MapID != parent.ID) {
		return ErrInvalid
	}
	if task.OwnerID != actor {
		if err := archiveResource(ctx, tx, task); err != nil {
			return err
		}
	}
	if parent.Kind == "flows" {
		task.Data["flow_id"] = ""
	} else {
		task.Data["map_id"] = ""
	}
	task.Status = "needs_configuration"
	return persistResource(ctx, tx, task, task.Version)
}