package database

import (
	"context"
	"database/sql"
	"errors"
	"fmt"
	"time"
)

// GetSetting returns a setting and whether it exists.
func GetSetting(ctx context.Context, db *sql.DB, key string) (string, bool, error) {
	var value string
	err := db.QueryRowContext(ctx, `SELECT value FROM settings WHERE key = ?`, key).Scan(&value)
	if errors.Is(err, sql.ErrNoRows) {
		return "", false, nil
	}
	if err != nil {
		return "", false, fmt.Errorf("get setting %q: %w", key, err)
	}
	return value, true, nil
}

// SetSetting upserts a setting with an RFC3339 UTC timestamp.
func SetSetting(ctx context.Context, db *sql.DB, key, value string) error {
	_, err := db.ExecContext(ctx, `
        INSERT INTO settings(key, value, updated_at) VALUES(?, ?, ?)
        ON CONFLICT(key) DO UPDATE SET value = excluded.value, updated_at = excluded.updated_at
    `, key, value, time.Now().UTC().Format(time.RFC3339Nano))
	if err != nil {
		return fmt.Errorf("set setting %q: %w", key, err)
	}
	return nil
}