package dbx

import (
	"time"

	"github.com/jackc/pgx/v5"
)

// Option is a functional option for NewCluster.
type Option func(*Config)

// WithLogger sets the logger for the cluster.
func WithLogger(l Logger) Option {
	return func(c *Config) {
		c.Logger = l
	}
}

// WithMetrics sets the metrics hook for the cluster.
func WithMetrics(m *MetricsHook) Option {
	return func(c *Config) {
		c.Metrics = m
	}
}

// WithRetry overrides the retry configuration.
func WithRetry(r RetryConfig) Option {
	return func(c *Config) {
		c.Retry = r
	}
}

// WithHealthCheck overrides the health check configuration.
func WithHealthCheck(h HealthCheckConfig) Option {
	return func(c *Config) {
		c.HealthCheck = h
	}
}

// WithSlowQueryThreshold sets the threshold for slow query warnings.
// Queries taking longer than d will be logged at Warn level.
func WithSlowQueryThreshold(d time.Duration) Option {
	return func(c *Config) {
		c.SlowQueryThreshold = d
	}
}

// WithTracer sets the pgx.QueryTracer on master and all replica configs.
// This enables OpenTelemetry integration via libraries like otelpgx.
func WithTracer(t pgx.QueryTracer) Option {
	return func(c *Config) {
		c.Master.Tracer = t
		for i := range c.Replicas {
			c.Replicas[i].Tracer = t
		}
	}
}

// ApplyOptions applies functional options to a Config.
func ApplyOptions(cfg *Config, opts ...Option) {
	for _, o := range opts {
		o(cfg)
	}
}