package sinks

import (
	"fmt"
	"strings"

	"gitea.maximumdirect.net/ejr/feedkit/config"
)

// requireStringParam returns a non-empty string sink param.
//
// This helper is intentionally local to sinks rather than config so
// driver-specific validation stays close to the adapters that use it.
func requireStringParam(cfg config.SinkConfig, key string) (string, error) {
	v, ok := cfg.Params[key]
	if !ok {
		return "", fmt.Errorf("sink %q: params.%s is required", cfg.Name, key)
	}
	s, ok := v.(string)
	if !ok {
		return "", fmt.Errorf("sink %q: params.%s must be a string", cfg.Name, key)
	}
	if strings.TrimSpace(s) == "" {
		return "", fmt.Errorf("sink %q: params.%s cannot be empty", cfg.Name, key)
	}
	return s, nil
}

// RegisterPostgresSchemaForConfiguredSinks registers one Postgres schema for each
// configured sink using driver=postgres.
func RegisterPostgresSchemaForConfiguredSinks(cfg *config.Config, schema PostgresSchema) error {
	if cfg == nil {
		return fmt.Errorf("register postgres schemas: config is nil")
	}

	for i, sk := range cfg.Sinks {
		if !strings.EqualFold(strings.TrimSpace(sk.Driver), "postgres") {
			continue
		}
		if err := RegisterPostgresSchema(sk.Name, schema); err != nil {
			return fmt.Errorf("register postgres schema for sinks[%d] name=%q: %w", i, sk.Name, err)
		}
	}

	return nil
}