// Package redisadapter provides the Redis client helpers used by Notification
// Service runtime wiring. The helpers wrap `pkg/redisconn` so the runtime
// keeps the same construction surface across the Stage 5 migration.
package redisadapter

import (
	"context"
	"fmt"

	"galaxy/notification/internal/config"
	"galaxy/notification/internal/telemetry"
	"galaxy/redisconn"

	"github.com/redis/go-redis/extra/redisotel/v9"
	"github.com/redis/go-redis/v9"
)

// NewClient constructs one Redis client from cfg using the shared
// `pkg/redisconn` helper, which enforces the master/replica/password env-var
// shape.
func NewClient(cfg config.RedisConfig) *redis.Client {
	return redisconn.NewMasterClient(cfg.Conn)
}

// InstrumentClient attaches Redis tracing and metrics exporters to client
// when telemetryRuntime is available.
func InstrumentClient(client *redis.Client, telemetryRuntime *telemetry.Runtime) error {
	if client == nil {
		return fmt.Errorf("instrument redis client: nil client")
	}
	if telemetryRuntime == nil {
		return nil
	}

	if err := redisotel.InstrumentTracing(
		client,
		redisotel.WithTracerProvider(telemetryRuntime.TracerProvider()),
		redisotel.WithDBStatement(false),
	); err != nil {
		return fmt.Errorf("instrument redis client tracing: %w", err)
	}
	if err := redisotel.InstrumentMetrics(
		client,
		redisotel.WithMeterProvider(telemetryRuntime.MeterProvider()),
	); err != nil {
		return fmt.Errorf("instrument redis client metrics: %w", err)
	}

	return nil
}

// Ping performs the startup Redis connectivity check bounded by
// cfg.Conn.OperationTimeout.
func Ping(ctx context.Context, cfg config.RedisConfig, client *redis.Client) error {
	if client == nil {
		return fmt.Errorf("ping redis: nil client")
	}

	pingCtx, cancel := context.WithTimeout(ctx, cfg.Conn.OperationTimeout)
	defer cancel()

	if err := client.Ping(pingCtx).Err(); err != nil {
		return fmt.Errorf("ping redis: %w", err)
	}

	return nil
}