package redis

import (
	"context"
	"fmt"
	"net"
	"strings"

	"github.com/redis/go-redis/v9/internal"
	"github.com/redis/go-redis/v9/internal/hashtag"
	"github.com/redis/go-redis/v9/internal/pool"
)

func (c *baseClient) Pool() pool.Pooler {
	return c.connPool
}

func (c *PubSub) SetNetConn(netConn net.Conn) {
	c.cn = pool.NewConn(netConn)
}

func (c *ClusterClient) LoadState(ctx context.Context) (*clusterState, error) {
	// return c.state.Reload(ctx)
	return c.loadState(ctx)
}

func (c *ClusterClient) SlotAddrs(ctx context.Context, slot int) []string {
	state, err := c.state.Get(ctx)
	if err != nil {
		panic(err)
	}

	var addrs []string
	for _, n := range state.slotNodes(slot) {
		addrs = append(addrs, n.Client.getAddr())
	}
	return addrs
}

func (c *ClusterClient) Nodes(ctx context.Context, key string) ([]*clusterNode, error) {
	state, err := c.state.Reload(ctx)
	if err != nil {
		return nil, err
	}

	slot := hashtag.Slot(key)
	nodes := state.slotNodes(slot)
	if len(nodes) != 2 {
		return nil, fmt.Errorf("slot=%d does not have enough nodes: %v", slot, nodes)
	}
	return nodes, nil
}

func (c *ClusterClient) SwapNodes(ctx context.Context, key string) error {
	nodes, err := c.Nodes(ctx, key)
	if err != nil {
		return err
	}
	nodes[0], nodes[1] = nodes[1], nodes[0]
	return nil
}

func (c *clusterState) IsConsistent(ctx context.Context) bool {
	if len(c.Masters) < 3 {
		return false
	}
	for _, master := range c.Masters {
		s := master.Client.Info(ctx, "replication").Val()
		if !strings.Contains(s, "role:master") {
			return false
		}
	}

	if len(c.Slaves) < 3 {
		return false
	}
	for _, slave := range c.Slaves {
		s := slave.Client.Info(ctx, "replication").Val()
		if !strings.Contains(s, "role:slave") {
			return false
		}
	}

	return true
}

func GetSlavesAddrByName(ctx context.Context, c *SentinelClient, name string) []string {
	addrs, err := c.Replicas(ctx, name).Result()
	if err != nil {
		internal.Logger.Printf(ctx, "sentinel: Replicas name=%q failed: %s",
			name, err)
		return []string{}
	}
	return parseReplicaAddrs(addrs, false)
}

func (c *Ring) ShardByName(name string) *ringShard {
	shard, _ := c.sharding.GetByName(name)
	return shard
}

func (c *ModuleLoadexConfig) ToArgs() []interface{} {
	return c.toArgs()
}

func ShouldRetry(err error, retryTimeout bool) bool {
	return shouldRetry(err, retryTimeout)
}

// SentinelFailoverHasSentinel returns true if the sentinelFailover
// still holds a live sentinel connection. Used in tests to verify
// that replicaAddrs does not tear down the sentinel for master-only
// (zero-replica) setups.
func (c *sentinelFailover) HasSentinel() bool {
	c.mu.RLock()
	defer c.mu.RUnlock()
	return c.sentinel != nil
}

// NewTestSentinelFailover creates a sentinelFailover with minimal
// options for unit testing. The caller must set c.sentinel manually.
func NewTestSentinelFailover(opt *FailoverOptions, sentinelAddrs []string) *sentinelFailover {
	return &sentinelFailover{
		opt:           opt,
		sentinelAddrs: sentinelAddrs,
	}
}

// ReplicaAddrs is exported for testing.
func (c *sentinelFailover) ReplicaAddrs(ctx context.Context) ([]string, error) {
	return c.replicaAddrs(ctx, false)
}