package main

import (
	"context"
	"fmt"

	"github.com/steveyegge/beads/internal/storage"
	"github.com/steveyegge/beads/internal/types"
)

func validateIssueUpdatable(id string, issue *types.Issue) error {
	if issue == nil {
		return nil
	}
	if issue.IsTemplate {
		return fmt.Errorf("Error: cannot update template %s: templates are read-only; use 'bd molecule instantiate' to create a work item", id)
	}
	return nil
}

func validateIssueClosable(id string, issue *types.Issue, force bool) error {
	if issue == nil {
		return nil
	}
	if issue.IsTemplate {
		return fmt.Errorf("Error: cannot close template %s: templates are read-only", id)
	}
	if !force && issue.Status == types.StatusPinned {
		return fmt.Errorf("Error: cannot close pinned issue %s (use --force to override)", id)
	}
	return nil
}

func applyLabelUpdates(ctx context.Context, st storage.Storage, issueID, actor string, setLabels, addLabels, removeLabels []string) error {
	// Set labels (replaces all existing labels)
	if len(setLabels) > 0 {
		currentLabels, err := st.GetLabels(ctx, issueID)
		if err != nil {
			return err
		}
		for _, label := range currentLabels {
			if err := st.RemoveLabel(ctx, issueID, label, actor); err != nil {
				return err
			}
		}
		for _, label := range setLabels {
			if err := st.AddLabel(ctx, issueID, label, actor); err != nil {
				return err
			}
		}
	}

	// Add labels
	for _, label := range addLabels {
		if err := st.AddLabel(ctx, issueID, label, actor); err != nil {
			return err
		}
	}

	// Remove labels
	for _, label := range removeLabels {
		if err := st.RemoveLabel(ctx, issueID, label, actor); err != nil {
			return err
		}
	}

	return nil
}