hardware-query 0.2.1

#![allow(dead_code)] // Many helper functions are for future implementation

use crate::Result;
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::fs;
use std::path::Path;

/// FPGA vendor information
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum FPGAVendor {
    Intel,
    Xilinx,
    Microsemi,
    Lattice,
    Altera, // Legacy, now part of Intel
    Unknown(String),
}

impl std::fmt::Display for FPGAVendor {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            FPGAVendor::Intel => write!(f, "Intel"),
            FPGAVendor::Xilinx => write!(f, "Xilinx"),
            FPGAVendor::Microsemi => write!(f, "Microsemi"),
            FPGAVendor::Lattice => write!(f, "Lattice"),
            FPGAVendor::Altera => write!(f, "Altera"),
            FPGAVendor::Unknown(name) => write!(f, "{name}"),
        }
    }
}

/// FPGA family/series information
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum FPGAFamily {
    // Intel FPGA families
    IntelArria10,
    IntelStratix10,
    IntelCyclone5,
    IntelAgilex,
    
    // Xilinx FPGA families
    XilinxKintex7,
    XilinxVirtex7,
    XilinxZynq7000,
    XilinxZynqUltraScale,
    XilinxKintexUltraScale,
    XilinxVirtexUltraScale,
    XilinxVersal,
    
    // Other vendors
    MicrosemiPolarFire,
    LatticeECP5,
    
    Unknown(String),
}

impl std::fmt::Display for FPGAFamily {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            FPGAFamily::IntelArria10 => write!(f, "Intel Arria 10"),
            FPGAFamily::IntelStratix10 => write!(f, "Intel Stratix 10"),
            FPGAFamily::IntelCyclone5 => write!(f, "Intel Cyclone V"),
            FPGAFamily::IntelAgilex => write!(f, "Intel Agilex"),
            FPGAFamily::XilinxKintex7 => write!(f, "Xilinx Kintex-7"),
            FPGAFamily::XilinxVirtex7 => write!(f, "Xilinx Virtex-7"),
            FPGAFamily::XilinxZynq7000 => write!(f, "Xilinx Zynq-7000"),
            FPGAFamily::XilinxZynqUltraScale => write!(f, "Xilinx Zynq UltraScale+"),
            FPGAFamily::XilinxKintexUltraScale => write!(f, "Xilinx Kintex UltraScale+"),
            FPGAFamily::XilinxVirtexUltraScale => write!(f, "Xilinx Virtex UltraScale+"),
            FPGAFamily::XilinxVersal => write!(f, "Xilinx Versal"),
            FPGAFamily::MicrosemiPolarFire => write!(f, "Microsemi PolarFire"),
            FPGAFamily::LatticeECP5 => write!(f, "Lattice ECP5"),
            FPGAFamily::Unknown(name) => write!(f, "{name}"),
        }
    }
}

/// FPGA interface type
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum FPGAInterface {
    PCIe,
    USB,
    Ethernet,
    SPI,
    I2C,
    JTAG,
    Embedded,
    Unknown(String),
}

/// FPGA accelerator information
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FPGAInfo {
    /// FPGA vendor
    pub vendor: FPGAVendor,
    
    /// FPGA family/series
    pub family: FPGAFamily,
    
    /// Device model/part number
    pub model: String,
    
    /// Device ID (PCI, USB, etc.)
    pub device_id: Option<String>,
    
    /// Vendor ID
    pub vendor_id: Option<String>,
    
    /// Interface type
    pub interface: FPGAInterface,
    
    /// Logic elements/cells count
    pub logic_elements: Option<u64>,
    
    /// Block RAM (BRAM) size in bits
    pub block_ram_bits: Option<u64>,
    
    /// DSP slices/blocks count
    pub dsp_blocks: Option<u32>,
    
    /// Maximum operating frequency (MHz)
    pub max_frequency_mhz: Option<u32>,
    
    /// Power consumption (watts)
    pub power_consumption: Option<f32>,
    
    /// AI/ML acceleration capabilities
    pub ml_capabilities: HashMap<String, String>,
    
    /// Supported development tools
    pub development_tools: Vec<String>,
    
    /// Current configuration/bitstream
    pub current_config: Option<String>,
    
    /// Driver version
    pub driver_version: Option<String>,
    
    /// Temperature sensors (if available)
    pub temperature: Option<f32>,
}

impl FPGAInfo {
    /// Detect FPGA accelerators in the system
    pub fn detect_fpgas() -> Result<Vec<FPGAInfo>> {
        let mut fpgas = Vec::new();
        
        // Detect PCIe-based FPGAs
        fpgas.extend(Self::detect_pcie_fpgas()?);
        
        // Detect USB-based FPGAs
        fpgas.extend(Self::detect_usb_fpgas()?);
        
        // Detect embedded FPGAs (for ARM systems)
        fpgas.extend(Self::detect_embedded_fpgas()?);
        
        Ok(fpgas)
    }
    
    fn detect_pcie_fpgas() -> Result<Vec<FPGAInfo>> {
        let mut fpgas = Vec::new();
        
        #[cfg(target_os = "linux")]
        {
            // Read from /sys/bus/pci/devices
            if let Ok(entries) = fs::read_dir("/sys/bus/pci/devices") {
                for entry in entries.flatten() {
                    if let Some(fpga) = Self::check_pci_device_for_fpga(&entry.path())? {
                        fpgas.push(fpga);
                    }
                }
            }
        }
        
        #[cfg(target_os = "windows")]
        {
            // Use WMI to detect PCIe devices
            fpgas.extend(Self::detect_fpgas_windows_wmi()?);
        }
        
        #[cfg(target_os = "macos")]
        {
            // Use system_profiler to detect PCIe devices
            fpgas.extend(Self::detect_fpgas_macos()?);
        }
        
        Ok(fpgas)
    }
    
    #[cfg(target_os = "linux")]
    fn check_pci_device_for_fpga(device_path: &Path) -> Result<Option<FPGAInfo>> {
        let vendor_id = Self::read_hex_file(&device_path.join("vendor"))?;
        let device_id = Self::read_hex_file(&device_path.join("device"))?;
        
        if let (Some(vendor), Some(device)) = (vendor_id, device_id) {
            // Check known FPGA vendor/device IDs
            if let Some(fpga_info) = Self::identify_fpga_by_ids(vendor, device) {
                return Ok(Some(fpga_info));
            }
            
            // Check device class for FPGA-like devices
            if let Some(class) = Self::read_hex_file(&device_path.join("class"))? {
                // Class 0x120000 is often used for FPGA devices
                if class == 0x120000 || class == 0x058000 {
                    return Ok(Some(Self::create_generic_fpga_info(vendor, device)));
                }
            }
        }
        
        Ok(None)
    }
    
    fn read_hex_file(path: &Path) -> Result<Option<u32>> {
        if let Ok(content) = fs::read_to_string(path) {
            if let Ok(value) = u32::from_str_radix(content.trim().trim_start_matches("0x"), 16) {
                return Ok(Some(value));
            }
        }
        Ok(None)
    }
    
    fn identify_fpga_by_ids(vendor_id: u32, device_id: u32) -> Option<FPGAInfo> {
        match vendor_id {
            0x1172 => { // Altera/Intel FPGA vendor ID
                Some(Self::create_intel_fpga_info(device_id))
            },
            0x10EE => { // Xilinx vendor ID
                Some(Self::create_xilinx_fpga_info(device_id))
            },
            0x11F8 => { // PMC-Sierra/Microsemi
                Some(Self::create_microsemi_fpga_info(device_id))
            },
            0x1204 => { // Lattice Semiconductor
                Some(Self::create_lattice_fpga_info(device_id))
            },
            _ => None,
        }
    }
    
    fn create_intel_fpga_info(device_id: u32) -> FPGAInfo {
        let (family, model, specs) = match device_id {
            0x09C4 => (FPGAFamily::IntelArria10, "Arria 10 GX", (1150000, 53248000, 1518, 800)),
            0x09C5 => (FPGAFamily::IntelArria10, "Arria 10 GT", (1150000, 65536000, 1518, 800)),
            0x1D1C => (FPGAFamily::IntelStratix10, "Stratix 10 GX", (2753000, 229376000, 5760, 1000)),
            0x1D1D => (FPGAFamily::IntelStratix10, "Stratix 10 TX", (2753000, 229376000, 5760, 1000)),
            0x4350 => (FPGAFamily::IntelAgilex, "Agilex F-Series", (2700000, 270000000, 5760, 1100)),
            _ => {
                let family = FPGAFamily::Unknown(format!("Intel Device 0x{device_id:04X}"));
                let model = format!("Intel FPGA Device 0x{device_id:04X}");
                return FPGAInfo {
                    vendor: FPGAVendor::Intel,
                    family,
                    model,
                    device_id: Some(format!("0x{device_id:04X}")),
                    vendor_id: Some("0x1172".to_string()),
                    interface: FPGAInterface::PCIe,
                    logic_elements: None,
                    block_ram_bits: None,
                    dsp_blocks: None,
                    max_frequency_mhz: None,
                    power_consumption: None,
                    ml_capabilities: HashMap::from([
                        ("openCL_support".to_string(), "true".to_string()),
                        ("oneAPI_support".to_string(), "true".to_string()),
                        ("dsp_optimization".to_string(), "true".to_string()),
                    ]),
                    development_tools: vec![
                        "Intel Quartus Prime".to_string(),
                        "Intel OpenCL SDK".to_string(),
                        "Intel oneAPI".to_string(),
                    ],
                    current_config: None,
                    driver_version: None,
                    temperature: None,
                };
            }
        };
        
        FPGAInfo {
            vendor: FPGAVendor::Intel,
            family,
            model: model.to_string(),
            device_id: Some(format!("0x{device_id:04X}")),
            vendor_id: Some("0x1172".to_string()),
            interface: FPGAInterface::PCIe,
            logic_elements: if specs.0 > 0 { Some(specs.0) } else { None },
            block_ram_bits: if specs.1 > 0 { Some(specs.1) } else { None },
            dsp_blocks: if specs.2 > 0 { Some(specs.2) } else { None },
            max_frequency_mhz: if specs.3 > 0 { Some(specs.3) } else { None },
            power_consumption: None,
            ml_capabilities: HashMap::from([
                ("openCL_support".to_string(), "true".to_string()),
                ("oneAPI_support".to_string(), "true".to_string()),
                ("dsp_optimization".to_string(), "true".to_string()),
            ]),
            development_tools: vec![
                "Intel Quartus Prime".to_string(),
                "Intel OpenCL SDK".to_string(),
                "Intel oneAPI".to_string(),
            ],
            current_config: None,
            driver_version: None,
            temperature: None,
        }
    }
    
    fn create_xilinx_fpga_info(device_id: u32) -> FPGAInfo {
        let (family, model, specs) = match device_id {
            0x7028 => (FPGAFamily::XilinxKintex7, "Kintex-7 K325T", (326080, 16020000, 840, 464)),
            0x7034 => (FPGAFamily::XilinxVirtex7, "Virtex-7 V485T", (485760, 37080000, 2800, 600)),
            0x7020 => (FPGAFamily::XilinxZynq7000, "Zynq-7000 Z020", (85000, 4900000, 220, 766)),
            0x9038 => (FPGAFamily::XilinxZynqUltraScale, "Zynq UltraScale+ ZU19EG", (1143000, 75900000, 1968, 850)),
            0x906C => (FPGAFamily::XilinxKintexUltraScale, "Kintex UltraScale+ KU15P", (1451000, 75900000, 1968, 925)),
            0x9058 => (FPGAFamily::XilinxVirtexUltraScale, "Virtex UltraScale+ VU19P", (8938000, 270000000, 12288, 750)),
            0x5008 => (FPGAFamily::XilinxVersal, "Versal Prime VP1202", (899000, 57600000, 1968, 1300)),
            _ => {
                let family = FPGAFamily::Unknown(format!("Xilinx Device 0x{device_id:04X}"));
                let model = format!("Xilinx FPGA Device 0x{device_id:04X}");
                return FPGAInfo {
                    vendor: FPGAVendor::Xilinx,
                    family,
                    model,
                    device_id: Some(format!("0x{device_id:04X}")),
                    vendor_id: Some("0x10EE".to_string()),
                    interface: FPGAInterface::PCIe,
                    logic_elements: None,
                    block_ram_bits: None,
                    dsp_blocks: None,
                    max_frequency_mhz: None,
                    power_consumption: None,
                    ml_capabilities: HashMap::from([
                        ("vitis_ai_support".to_string(), "true".to_string()),
                        ("dpu_acceleration".to_string(), "true".to_string()),
                        ("hls_support".to_string(), "true".to_string()),
                    ]),
                    development_tools: vec![
                        "Xilinx Vivado".to_string(),
                        "Xilinx Vitis".to_string(),
                        "Xilinx Vitis AI".to_string(),
                    ],
                    current_config: None,
                    driver_version: None,
                    temperature: None,
                };
            }
        };
        
        FPGAInfo {
            vendor: FPGAVendor::Xilinx,
            family,
            model: model.to_string(),
            device_id: Some(format!("0x{device_id:04X}")),
            vendor_id: Some("0x10EE".to_string()),
            interface: FPGAInterface::PCIe,
            logic_elements: if specs.0 > 0 { Some(specs.0) } else { None },
            block_ram_bits: if specs.1 > 0 { Some(specs.1) } else { None },
            dsp_blocks: if specs.2 > 0 { Some(specs.2) } else { None },
            max_frequency_mhz: if specs.3 > 0 { Some(specs.3) } else { None },
            power_consumption: None,
            ml_capabilities: HashMap::from([
                ("vitis_ai_support".to_string(), "true".to_string()),
                ("dpu_acceleration".to_string(), "true".to_string()),
                ("hls_support".to_string(), "true".to_string()),
            ]),
            development_tools: vec![
                "Xilinx Vivado".to_string(),
                "Xilinx Vitis".to_string(),
                "Xilinx Vitis AI".to_string(),
            ],
            current_config: None,
            driver_version: None,
            temperature: None,
        }
    }
    
    fn create_microsemi_fpga_info(device_id: u32) -> FPGAInfo {
        FPGAInfo {
            vendor: FPGAVendor::Microsemi,
            family: FPGAFamily::MicrosemiPolarFire,
            model: format!("Microsemi Device 0x{device_id:04X}"),
            device_id: Some(format!("0x{device_id:04X}")),
            vendor_id: Some("0x11F8".to_string()),
            interface: FPGAInterface::PCIe,
            logic_elements: None,
            block_ram_bits: None,
            dsp_blocks: None,
            max_frequency_mhz: None,
            power_consumption: None,
            ml_capabilities: HashMap::from([
                ("low_power_inference".to_string(), "true".to_string()),
            ]),
            development_tools: vec!["Libero SoC".to_string()],
            current_config: None,
            driver_version: None,
            temperature: None,
        }
    }
    
    fn create_lattice_fpga_info(device_id: u32) -> FPGAInfo {
        FPGAInfo {
            vendor: FPGAVendor::Lattice,
            family: FPGAFamily::LatticeECP5,
            model: format!("Lattice Device 0x{device_id:04X}"),
            device_id: Some(format!("0x{device_id:04X}")),
            vendor_id: Some("0x1204".to_string()),
            interface: FPGAInterface::PCIe,
            logic_elements: None,
            block_ram_bits: None,
            dsp_blocks: None,
            max_frequency_mhz: None,
            power_consumption: None,
            ml_capabilities: HashMap::from([
                ("edge_ai_inference".to_string(), "true".to_string()),
                ("low_power".to_string(), "true".to_string()),
            ]),
            development_tools: vec!["Lattice Diamond".to_string(), "Lattice Radiant".to_string()],
            current_config: None,
            driver_version: None,
            temperature: None,
        }
    }
    
    fn create_generic_fpga_info(vendor_id: u32, device_id: u32) -> FPGAInfo {
        FPGAInfo {
            vendor: FPGAVendor::Unknown(format!("0x{vendor_id:04X}")),
            family: FPGAFamily::Unknown("Unknown".to_string()),
            model: format!("FPGA Device 0x{vendor_id:04X}:0x{device_id:04X}"),
            device_id: Some(format!("0x{device_id:04X}")),
            vendor_id: Some(format!("0x{vendor_id:04X}")),
            interface: FPGAInterface::PCIe,
            logic_elements: None,
            block_ram_bits: None,
            dsp_blocks: None,
            max_frequency_mhz: None,
            power_consumption: None,
            ml_capabilities: HashMap::new(),
            development_tools: Vec::new(),
            current_config: None,
            driver_version: None,
            temperature: None,
        }
    }
    
    fn detect_usb_fpgas() -> Result<Vec<FPGAInfo>> {
        // Placeholder for USB FPGA detection (like some development boards)
        Ok(Vec::new())
    }
    
    fn detect_embedded_fpgas() -> Result<Vec<FPGAInfo>> {
        // Placeholder for embedded FPGA detection (like Zynq SoCs)
        Ok(Vec::new())
    }
    
    #[cfg(target_os = "windows")]
    fn detect_fpgas_windows_wmi() -> Result<Vec<FPGAInfo>> {
        // Placeholder for Windows WMI detection
        Ok(Vec::new())
    }
    
    #[cfg(target_os = "macos")]
    fn detect_fpgas_macos() -> Result<Vec<FPGAInfo>> {
        // Placeholder for macOS detection
        Ok(Vec::new())
    }
    
    /// Calculate theoretical AI performance metrics for the FPGA
    pub fn calculate_ai_performance(&self) -> HashMap<String, f64> {
        let mut metrics = HashMap::new();
        
        if let (Some(dsp_blocks), Some(freq_mhz)) = (self.dsp_blocks, self.max_frequency_mhz) {
            // Theoretical operations per second
            let ops_per_second = (dsp_blocks as f64) * (freq_mhz as f64) * 1_000_000.0;
            metrics.insert("theoretical_ops_per_second".to_string(), ops_per_second);
            
            // Estimate for different precisions
            metrics.insert("int8_ops_per_second".to_string(), ops_per_second * 4.0);
            metrics.insert("int16_ops_per_second".to_string(), ops_per_second * 2.0);
            metrics.insert("fp32_ops_per_second".to_string(), ops_per_second);
        }
        
        if let Some(logic_elements) = self.logic_elements {
            // Logic utilization efficiency for AI workloads
            let efficiency_score = (logic_elements as f64) / 1_000_000.0; // Normalize to millions
            metrics.insert("logic_efficiency_score".to_string(), efficiency_score);
        }
        
        metrics
    }
    
    /// Get AI framework compatibility
    pub fn get_ai_framework_support(&self) -> Vec<String> {
        let mut frameworks = Vec::new();
        
        match self.vendor {
            FPGAVendor::Intel => {
                frameworks.extend(vec![
                    "Intel OpenVINO".to_string(),
                    "Intel oneAPI".to_string(),
                    "OpenCL".to_string(),
                ]);
            },
            FPGAVendor::Xilinx => {
                frameworks.extend(vec![
                    "Xilinx Vitis AI".to_string(),
                    "TensorFlow".to_string(),
                    "PyTorch".to_string(),
                    "ONNX".to_string(),
                ]);
            },
            _ => {
                frameworks.push("Custom FPGA frameworks".to_string());
            }
        }
        
        frameworks
    }
}