use crate::config::AppConfig;
use crate::error::{AppError, AppResult};

impl AppConfig {
    pub fn redis_url(&self) -> AppResult<Option<String>> {
        self.get_env::<String>("APP_REDIS_URL")
    }

    pub fn redis_cluster_enabled(&self) -> AppResult<bool> {
        self.get_env_or("APP_REDIS_CLUSTER_ENABLED", false)
    }

    pub fn redis_cluster_nodes(&self) -> AppResult<Vec<String>> {
        match self.get_env::<String>("APP_REDIS_CLUSTER_NODES")? {
            Some(s) if !s.is_empty() => Ok(s
                .split(',')
                .map(|u| u.trim().to_string())
                .filter(|u| !u.is_empty())
                .collect()),
            _ => Ok(Vec::new()),
        }
    }

    pub fn redis_read_from_replicas(&self) -> AppResult<bool> {
        self.get_env_or("APP_REDIS_READ_FROM_REPLICAS", false)
    }

    pub fn redis_username(&self) -> AppResult<Option<String>> {
        self.get_env::<String>("APP_REDIS_USERNAME")
    }

    pub fn redis_password(&self) -> AppResult<Option<String>> {
        self.get_env::<String>("APP_REDIS_PASSWORD")
    }

    pub fn redis_database(&self) -> AppResult<u8> {
        self.get_env_or("APP_REDIS_DATABASE", 0u8)
    }

    pub fn redis_max_connections(&self) -> AppResult<u32> {
        self.get_env_or("APP_REDIS_MAX_CONNECTIONS", 20)
    }

    pub fn redis_min_connections(&self) -> AppResult<u32> {
        self.get_env_or("APP_REDIS_MIN_CONNECTIONS", 2)
    }

    pub fn redis_idle_timeout(&self) -> AppResult<u64> {
        self.get_env_or("APP_REDIS_IDLE_TIMEOUT", 300)
    }

    pub fn redis_connection_timeout(&self) -> AppResult<u64> {
        self.get_env_or("APP_REDIS_CONNECTION_TIMEOUT", 5)
    }

    pub fn redis_max_retries(&self) -> AppResult<u32> {
        self.get_env_or("APP_REDIS_MAX_RETRIES", 3)
    }

    pub fn redis_retry_delay_ms(&self) -> AppResult<u64> {
        self.get_env_or("APP_REDIS_RETRY_DELAY_MS", 100)
    }

    pub fn redis_tls_enabled(&self) -> AppResult<bool> {
        self.get_env_or("APP_REDIS_TLS_ENABLED", false)
    }

    pub fn redis_key_prefix(&self) -> AppResult<String> {
        self.get_env_or("APP_REDIS_KEY_PREFIX", "".to_string())
    }

    pub fn redis_validate(&self) -> AppResult<()> {
        if self.redis_cluster_enabled()? {
            let nodes = self.redis_cluster_nodes()?;
            if nodes.is_empty() {
                return Err(AppError::Config(
                    "Redis cluster enabled but APP_REDIS_CLUSTER_NODES is empty".into(),
                ));
            }
        } else if self.redis_url()?.is_none() {
            return Err(AppError::Config(
                "Redis cluster disabled but APP_REDIS_URL is not set".into(),
            ));
        }
        Ok(())
    }
}