use super::{RpcHandler, DEV_DEFAULT_PASSWORD};
use anyhow::Result;

impl RpcHandler {
    pub(super) async fn handle_auth_login(
        &self,
        params: Option<serde_json::Value>,
    ) -> Result<serde_json::Value> {
        let params = params.ok_or_else(|| anyhow::anyhow!("Missing params"))?;
        let password = params
            .get("password")
            .and_then(|v| v.as_str())
            .ok_or_else(|| anyhow::anyhow!("Missing password"))?;

        let is_setup = self.auth_manager.is_setup().await?;
        if !is_setup {
            // Dev mode: allow default password so UI can log in without running setup
            if self.config.dev_mode && password == DEV_DEFAULT_PASSWORD {
                tracing::info!("[onboarding] login via dev default password");
                return Ok(serde_json::Value::Null);
            }
            tracing::warn!("[onboarding] login attempt before setup complete");
            return Err(anyhow::anyhow!(
                "User not set up. Please complete setup first."
            ));
        }

        let valid = self.auth_manager.verify_password(password).await?;
        if !valid {
            tracing::warn!("[onboarding] login failed — wrong password");
            return Err(anyhow::anyhow!("Password Incorrect"));
        }

        tracing::info!("[onboarding] login successful");

        // Ensure NostrVPN config exists — covers the case where onboardingComplete
        // was never called (e.g., user took the "already set up" shortcut).
        let data_dir = self.config.data_dir.clone();
        tokio::spawn(async move {
            // Quick check: if config.toml already exists, skip
            let config_path = data_dir.join("nostr-vpn/.config/nvpn/config.toml");
            if config_path.exists() {
                return;
            }
            // Identity must exist for VPN config
            if !data_dir.join("identity/nostr_pubkey").exists() {
                return;
            }
            match crate::vpn::configure_nostr_vpn(&data_dir).await {
                Ok(()) => tracing::info!("[login] NostrVPN auto-configured on first login"),
                Err(e) => tracing::debug!("[login] NostrVPN auto-config skipped: {}", e),
            }
        });

        Ok(serde_json::Value::Null)
    }

    pub(super) async fn handle_auth_logout(&self) -> Result<serde_json::Value> {
        tracing::info!("[onboarding] logout");
        Ok(serde_json::Value::Null)
    }

    pub(super) async fn handle_auth_change_password(
        &self,
        params: Option<serde_json::Value>,
        session_token: &Option<String>,
    ) -> Result<serde_json::Value> {
        let params = params.ok_or_else(|| anyhow::anyhow!("Missing params"))?;
        let current_password = params
            .get("currentPassword")
            .and_then(|v| v.as_str())
            .ok_or_else(|| anyhow::anyhow!("Missing currentPassword"))?;
        let new_password = params
            .get("newPassword")
            .and_then(|v| v.as_str())
            .ok_or_else(|| anyhow::anyhow!("Missing newPassword"))?;
        let also_change_ssh = params
            .get("alsoChangeSsh")
            .and_then(|v| v.as_bool())
            .unwrap_or(true);

        self.auth_manager
            .change_password(current_password, new_password, also_change_ssh)
            .await?;

        // Session rotation: invalidate all other sessions, rotate the caller's session
        if let Some(token) = session_token {
            self.session_store.invalidate_all_except(token).await;
        }

        Ok(serde_json::json!({ "success": true, "session_rotated": true }))
    }

    pub(super) async fn handle_auth_is_setup(&self) -> Result<serde_json::Value> {
        let is_setup = self.auth_manager.is_setup().await?;
        Ok(serde_json::json!(is_setup))
    }

    pub(super) async fn handle_auth_setup(
        &self,
        params: Option<serde_json::Value>,
    ) -> Result<serde_json::Value> {
        // Prevent re-setup if already set up
        let is_setup = self.auth_manager.is_setup().await?;
        if is_setup {
            tracing::warn!("[onboarding] setup rejected — already set up");
            return Err(anyhow::anyhow!(
                "Already set up. Use auth.changePassword to change."
            ));
        }

        let params = params.ok_or_else(|| anyhow::anyhow!("Missing params"))?;
        let password = params
            .get("password")
            .and_then(|v| v.as_str())
            .ok_or_else(|| anyhow::anyhow!("Missing password"))?;

        if password.len() < 8 {
            tracing::warn!("[onboarding] setup rejected — password too short");
            return Err(anyhow::anyhow!("Password must be at least 8 characters"));
        }

        self.auth_manager.setup_user(password).await?;
        tracing::info!("[onboarding] user setup complete");
        Ok(serde_json::json!(true))
    }

    pub(super) async fn handle_auth_onboarding_complete(&self) -> Result<serde_json::Value> {
        self.auth_manager.complete_onboarding().await?;
        tracing::info!("[onboarding] onboarding marked complete");

        // Auto-configure NostrVPN with the node's Nostr identity
        let data_dir = self.config.data_dir.clone();
        tokio::spawn(async move {
            match crate::vpn::configure_nostr_vpn(&data_dir).await {
                Ok(()) => tracing::info!("[onboarding] NostrVPN configured and started"),
                Err(e) => tracing::warn!("[onboarding] NostrVPN setup (non-fatal): {}", e),
            }
        });

        Ok(serde_json::json!(true))
    }

    pub(super) async fn handle_auth_is_onboarding_complete(&self) -> Result<serde_json::Value> {
        let complete = self.auth_manager.is_onboarding_complete().await?;
        tracing::debug!("[onboarding] isOnboardingComplete={}", complete);
        Ok(serde_json::json!(complete))
    }

    pub(super) async fn handle_auth_reset_onboarding(
        &self,
        params: Option<serde_json::Value>,
    ) -> Result<serde_json::Value> {
        let params = params.ok_or_else(|| anyhow::anyhow!("Missing params"))?;
        let password = params
            .get("password")
            .and_then(|v| v.as_str())
            .ok_or_else(|| anyhow::anyhow!("Missing password — re-authentication required"))?;

        let valid = self.auth_manager.verify_password(password).await?;
        if !valid {
            tracing::warn!("[onboarding] reset rejected — wrong password");
            return Err(anyhow::anyhow!("Password Incorrect"));
        }

        self.auth_manager.reset_onboarding().await?;
        tracing::info!("[onboarding] onboarding reset");
        Ok(serde_json::json!(true))
    }
}