// Package redis provides Redis client for the KnowFoolery application.
package redis

import (
	"context"
	"fmt"
	"time"
)

// Config holds the configuration for the Redis client.
type Config struct {
	Host         string
	Port         int
	Password     string
	DB           int
	PoolSize     int
	MinIdleConns int
	DialTimeout  time.Duration
	ReadTimeout  time.Duration
	WriteTimeout time.Duration
}

// DefaultConfig returns a default configuration for development.
func DefaultConfig() Config {
	return Config{
		Host:         "localhost",
		Port:         6379,
		Password:     "",
		DB:           0,
		PoolSize:     10,
		MinIdleConns: 5,
		DialTimeout:  5 * time.Second,
		ReadTimeout:  3 * time.Second,
		WriteTimeout: 3 * time.Second,
	}
}

// Addr returns the Redis server address.
func (c Config) Addr() string {
	return fmt.Sprintf("%s:%d", c.Host, c.Port)
}

// Client wraps Redis operations.
// This is a placeholder that should be replaced with an actual Redis client.
type Client struct {
	config Config
}

// NewClient creates a new Redis client.
// Note: Actual implementation should use go-redis/redis.
func NewClient(config Config) (*Client, error) {
	// This is a placeholder. The actual Redis client should be created
	// using github.com/go-redis/redis/v9
	return &Client{
		config: config,
	}, nil
}

// Close closes the Redis connection.
func (c *Client) Close() error {
	// Placeholder for closing Redis connection
	return nil
}

// Ping checks if the Redis connection is alive.
func (c *Client) Ping(ctx context.Context) error {
	// Placeholder for ping implementation
	return nil
}

// HealthCheck performs a health check on Redis.
func (c *Client) HealthCheck(ctx context.Context) error {
	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
	defer cancel()

	return c.Ping(ctx)
}

// Set stores a key-value pair with expiration.
func (c *Client) Set(ctx context.Context, key string, value interface{}, expiration time.Duration) error {
	// Placeholder for set implementation
	return fmt.Errorf("not implemented")
}

// Get retrieves a value by key.
func (c *Client) Get(ctx context.Context, key string) (string, error) {
	// Placeholder for get implementation
	return "", fmt.Errorf("not implemented")
}

// Delete removes a key.
func (c *Client) Delete(ctx context.Context, keys ...string) error {
	// Placeholder for delete implementation
	return fmt.Errorf("not implemented")
}

// Exists checks if a key exists.
func (c *Client) Exists(ctx context.Context, key string) (bool, error) {
	// Placeholder for exists implementation
	return false, fmt.Errorf("not implemented")
}

// Incr increments a counter.
func (c *Client) Incr(ctx context.Context, key string) (int64, error) {
	// Placeholder for incr implementation
	return 0, fmt.Errorf("not implemented")
}

// Expire sets expiration on a key.
func (c *Client) Expire(ctx context.Context, key string, expiration time.Duration) error {
	// Placeholder for expire implementation
	return fmt.Errorf("not implemented")
}

// ConfigFromEnv creates a Config from environment variables.
func ConfigFromEnv() Config {
	// TODO: Implement environment variable parsing
	return DefaultConfig()
}