package gitea

import (
	"context"
	"encoding/json"
	"fmt"
)

// ListLabels fetches all labels defined on a repo.
func (c *Client) ListLabels(ctx context.Context, owner, repo string) ([]Label, error) {
	p := fmt.Sprintf("/api/v1/repos/%s/%s/labels", owner, repo)
	body, status, err := c.GetJSON(ctx, p)
	if err != nil {
		return nil, err
	}
	if err := MapStatus(status, body); err != nil {
		return nil, err
	}
	var labels []Label
	if err := json.Unmarshal(body, &labels); err != nil {
		return nil, err
	}
	return labels, nil
}

// AddIssueLabels adds labelIDs to an issue or pull request (PRs share index
// space with issues, per Gitea). This is additive per Gitea's own POST
// semantics — existing labels are left in place, no replace/delete needed.
// Returns the issue's full label set after the add.
func (c *Client) AddIssueLabels(ctx context.Context, owner, repo string, number int, labelIDs []int64) ([]Label, error) {
	p := fmt.Sprintf("/api/v1/repos/%s/%s/issues/%d/labels", owner, repo, number)
	payload, err := json.Marshal(map[string][]int64{"labels": labelIDs})
	if err != nil {
		return nil, err
	}
	body, status, err := c.PostJSON(ctx, p, payload)
	if err != nil {
		return nil, err
	}
	if err := MapStatus(status, body); err != nil {
		return nil, err
	}
	var labels []Label
	if err := json.Unmarshal(body, &labels); err != nil {
		return nil, err
	}
	return labels, nil
}