// File Path: monorepo/cloud/maplepress-backend/pkg/storage/database/cassandra/cassandra.go
package database

import (
	"fmt"
	"strings"
	"time"

	"codeberg.org/mapleopentech/monorepo/cloud/maplepress-backend/config"
	"github.com/gocql/gocql"
	"go.uber.org/zap"
)

// gocqlLogger wraps zap logger to filter out noisy gocql warnings
type gocqlLogger struct {
	logger *zap.Logger
}

// Print implements gocql's Logger interface
func (l *gocqlLogger) Print(v ...interface{}) {
	msg := fmt.Sprint(v...)

	// Filter out noisy "invalid peer" warnings from Cassandra gossip
	// These are harmless and occur due to Docker networking
	if strings.Contains(msg, "Found invalid peer") {
		return
	}

	// Log other messages at debug level
	l.logger.Debug(msg)
}

// Printf implements gocql's Logger interface
func (l *gocqlLogger) Printf(format string, v ...interface{}) {
	msg := fmt.Sprintf(format, v...)

	// Filter out noisy "invalid peer" warnings from Cassandra gossip
	if strings.Contains(msg, "Found invalid peer") {
		return
	}

	// Log other messages at debug level
	l.logger.Debug(msg)
}

// Println implements gocql's Logger interface
func (l *gocqlLogger) Println(v ...interface{}) {
	msg := fmt.Sprintln(v...)

	// Filter out noisy "invalid peer" warnings from Cassandra gossip
	if strings.Contains(msg, "Found invalid peer") {
		return
	}

	// Log other messages at debug level
	l.logger.Debug(msg)
}

// ProvideCassandraSession creates a new Cassandra session
func ProvideCassandraSession(cfg *config.Config, logger *zap.Logger) (*gocql.Session, error) {
	logger.Info("⏳ Connecting to Cassandra...",
		zap.Strings("hosts", cfg.Database.Hosts),
		zap.String("keyspace", cfg.Database.Keyspace))

	// Create cluster configuration
	cluster := gocql.NewCluster(cfg.Database.Hosts...)
	cluster.Keyspace = cfg.Database.Keyspace
	cluster.Consistency = parseConsistency(cfg.Database.Consistency)
	cluster.ProtoVersion = 4
	cluster.ConnectTimeout = 10 * time.Second
	cluster.Timeout = 10 * time.Second
	cluster.NumConns = 2

	// Set custom logger to filter out noisy warnings
	cluster.Logger = &gocqlLogger{logger: logger.Named("gocql")}

	// Retry policy
	cluster.RetryPolicy = &gocql.ExponentialBackoffRetryPolicy{
		NumRetries: 3,
		Min:        1 * time.Second,
		Max:        10 * time.Second,
	}

	// Create session
	session, err := cluster.CreateSession()
	if err != nil {
		return nil, fmt.Errorf("failed to connect to Cassandra: %w", err)
	}

	logger.Info("✓ Cassandra connected",
		zap.String("consistency", cfg.Database.Consistency),
		zap.Int("connections", cluster.NumConns))

	return session, nil
}

// parseConsistency converts string consistency level to gocql.Consistency
func parseConsistency(consistency string) gocql.Consistency {
	switch consistency {
	case "ANY":
		return gocql.Any
	case "ONE":
		return gocql.One
	case "TWO":
		return gocql.Two
	case "THREE":
		return gocql.Three
	case "QUORUM":
		return gocql.Quorum
	case "ALL":
		return gocql.All
	case "LOCAL_QUORUM":
		return gocql.LocalQuorum
	case "EACH_QUORUM":
		return gocql.EachQuorum
	case "LOCAL_ONE":
		return gocql.LocalOne
	default:
		return gocql.Quorum // Default to QUORUM
	}
}