//! Build script for API Gateway service
//!
//! Compiles protobuf definitions for:
//! - Config service (`foxhunt.config` from `config_service.proto`)
//! - TLI services (`Trading`, `Backtesting`, `MLService` from `trading.proto`) - client-facing interface
//! - Trading Service backend (`trading.proto`) - backend trading service interface
//! - Risk Service backend (`risk.proto`) - backend risk service interface
//! - Monitoring Service backend (`monitoring.proto`) - backend monitoring service interface
//! - Config Service backend (`config.proto`) - backend config service interface
//! - Trading Service backend (`trading.proto`) - backend service interface
//! - ML Training Service (`ml_training.proto`)

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // NOTE: Tonic 0.14+ uses tonic_prost_build instead of tonic_build
    let config = tonic_prost_build::configure();

    // Compile Config Service proto
    config
        .clone()
        .build_server(true)
        .build_client(true)
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["proto/config_service.proto"],
            &["proto"]
        )?;

    // Compile TLI proto which contains TradingService, BacktestingService, and MLService
    // API Gateway acts as server (receives requests from TLI clients)
    // Keep client generation for backtesting_proxy compatibility
    config
        .clone()
        .build_server(true)  // Act as server for incoming requests
        .build_client(true)  // Generate client for backtesting service compatibility
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../../tli/proto/trading.proto"],
            &["../../tli/proto"]
        )?;

    // Compile Trading Service backend proto (package: trading)
    // API Gateway acts as client (forwards translated requests to Trading Service)
    config
        .clone()
        .build_server(false)  // API Gateway is only a client to Trading Service
        .build_client(true)   // Generate client to call backend
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../trading_service/proto/trading.proto"],
            &["../trading_service/proto"]
        )?;

    // Compile Risk Service backend proto (package: risk)
    // API Gateway acts as client (forwards translated requests to Risk Service)
    config
        .clone()
        .build_server(false)  // API Gateway is only a client to Risk Service
        .build_client(true)   // Generate client to call backend
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../trading_service/proto/risk.proto"],
            &["../trading_service/proto"]
        )?;

    // Compile Monitoring Service backend proto (package: monitoring)
    // API Gateway acts as client (forwards translated requests to Monitoring Service)
    config
        .clone()
        .build_server(false)  // API Gateway is only a client to Monitoring Service
        .build_client(true)   // Generate client to call backend
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../trading_service/proto/monitoring.proto"],
            &["../trading_service/proto"]
        )?;

    // Compile Config Service backend proto (package: config)
    // API Gateway acts as client (forwards translated requests to Config Service)
    config
        .clone()
        .build_server(false)  // API Gateway is only a client to Config Service
        .build_client(true)   // Generate client to call backend
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../trading_service/proto/config.proto"],
            &["../trading_service/proto"]
        )?;

    // Compile ML Training Service protobuf (client + server for proxying)
    config
        .clone()
        .build_server(true)  // API Gateway acts as server (receives proxy requests)
        .build_client(true)   // API Gateway acts as client (forwards to backend)
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../ml_training_service/proto/ml_training.proto"],
            &["../ml_training_service/proto"]
        )?;

    // Compile Trading Agent Service protobuf (client + server for proxying)
    config
        .clone()
        .build_server(true)  // API Gateway acts as server (receives proxy requests)
        .build_client(true)   // API Gateway acts as client (forwards to backend)
        .compile_well_known_types(true)
        .extern_path(".google.protobuf", "::prost_types")
        .type_attribute(".", "#[derive(serde::Serialize, serde::Deserialize)]")
        .server_mod_attribute(".", "#[allow(unused_qualifications)]")
        .client_mod_attribute(".", "#[allow(unused_qualifications)]")
        .compile_protos(
            &["../trading_agent_service/proto/trading_agent.proto"],
            &["../trading_agent_service/proto"]
        )?;

    println!("cargo:rerun-if-changed=proto/config_service.proto");
    println!("cargo:rerun-if-changed=../../tli/proto/trading.proto");
    println!("cargo:rerun-if-changed=../trading_service/proto/trading.proto");
    println!("cargo:rerun-if-changed=../trading_service/proto/risk.proto");
    println!("cargo:rerun-if-changed=../trading_service/proto/monitoring.proto");
    println!("cargo:rerun-if-changed=../trading_service/proto/config.proto");
    println!("cargo:rerun-if-changed=../ml_training_service/proto/ml_training.proto");
    println!("cargo:rerun-if-changed=../trading_agent_service/proto/trading_agent.proto");

    Ok(())
}