// config.h - Pin definitions and constants for ESP32-S3 CAN FD Logger
// Hardware: ESP32-S3-WROOM-1-N16R8 (16MB Flash, 8MB OPI PSRAM)
// Board Settings:
//   - Board: ESP32S3 Dev Module
//   - USB CDC On Boot: Enabled
//   - Partition Scheme: 16M Flash (3MB APP/9.9MB FAT)
//   - PSRAM: OPI PSRAM

#ifndef CONFIG_H
#define CONFIG_H

#include <Arduino.h>

// =============================================================================
// HSPI Pins (CAN FD MCP2518FD)
// =============================================================================
#define HSPI_MISO_PIN     13
#define HSPI_MOSI_PIN     11
#define HSPI_SCLK_PIN     12
#define HSPI_CS_PIN       10
#define CAN_INT_PIN       3     // NOTE: GPIO3 conflicts with USB D- if USB used

// =============================================================================
// SDIO 4-bit Pins (SD Card)
// =============================================================================
#define SDIO_CLK_PIN      39
#define SDIO_CMD_PIN      38
#define SDIO_D0_PIN       40
#define SDIO_D1_PIN       41
#define SDIO_D2_PIN       42
#define SDIO_D3_PIN       21    // WARNING: Strapping pin (boot mode)

// =============================================================================
// I2C Pins (DS3231 RTC)
// =============================================================================
#define RTC_SDA_PIN       8
#define RTC_SCL_PIN       9
#define DS3231_ADDRESS    0x68

// =============================================================================
// CAN FD Settings
// =============================================================================
#define CAN_DEFAULT_ARBITRATION_BAUDRATE  500000   // 500 kbps
#define CAN_DEFAULT_DATA_BAUDRATE         2000000  // 2 Mbps (CAN FD)
#define CAN_MAX_DATA_BAUDRATE             8000000  // 8 Mbps (max)
#define CAN_OSCILLATOR_FREQ               40000000 // 40 MHz crystal

// =============================================================================
// SD Card Settings
// =============================================================================
#define SD_MOUNT_POINT    "/sdcard"
#define LOGS_DIR          "/logs"
#define CONFIG_DIR        "/config"
#define FILE_SPLIT_SIZE   (100 * 1024 * 1024)  // 100 MB
#define PCAP_MAGIC_NUMBER 0xa1b2c3d4
#define PCAP_LINK_TYPE    227  // LINKTYPE_CAN_SOCKETCAN

// =============================================================================
// FreeRTOS Task Settings
// =============================================================================
#define TASK_PRIORITY_CAN_RX      5
#define TASK_PRIORITY_SD_WRITE    4
#define TASK_PRIORITY_CAN_TX      3
#define TASK_PRIORITY_WS_TX       3
#define TASK_PRIORITY_WEB_SERVER  2
#define TASK_PRIORITY_TIME_SYNC   1

#define TASK_STACK_CAN_RX         8192
#define TASK_STACK_SD_WRITE       8192
#define TASK_STACK_CAN_TX         4096
#define TASK_STACK_WS_TX          8192
#define TASK_STACK_WEB_SERVER     16384
#define TASK_STACK_TIME_SYNC      4096

// =============================================================================
// Queue Sizes (Increased for CAN FD high-speed operation)
// =============================================================================
#define QUEUE_SIZE_CAN_RX     5000          // Increased from 1000 for CAN FD burst handling
#define QUEUE_SIZE_CAN_TX     200           // Increased from 100
#define QUEUE_SIZE_GRAPH      500

// =============================================================================
// Buffer Settings
// =============================================================================
#define PSRAM_BUFFER_SIZE     (256 * 1024)  // 256 KB for CAN frame buffer (increased)
#define MAX_CAN_FRAMES        3200          // 256KB / ~80 bytes per frame
#define SD_WRITE_BUFFER_SIZE  (8 * 1024)    // 8 KB batch write buffer for SD card

// =============================================================================
// MCP2518FD FIFO Settings (Critical for zero frame loss)
// =============================================================================
#define MCP2518FD_RX_FIFO_SIZE    32        // MCP2518FD internal RX FIFO
#define MCP2518FD_TX_FIFO_SIZE    16        // MCP2518FD internal TX FIFO

// =============================================================================
// Performance Tuning
// =============================================================================
#define SD_FLUSH_INTERVAL_MS     1000       // Flush SD every 1 second (not every frame)
#define CAN_RX_BATCH_SIZE        32         // Process up to 32 frames per interrupt
#define TIMESTAMP_FROM_RTC       true       // Use DS3231 for drift correction

// =============================================================================
// Web Server Settings
// =============================================================================
#define WEB_SERVER_PORT       80
#define WIFI_AP_SSID          "ESP32-CANLogger"
#define WIFI_AP_PASSWORD      ""  // Open AP (no password)
#define WIFI_AP_CHANNEL       1
#define WIFI_AP_MAX_CLIENTS   4

// =============================================================================
// Time Settings
// =============================================================================
#define NTP_SYNC_INTERVAL_MS  (24 * 60 * 60 * 1000)  // 24 hours
#define TIMEZONE_OFFSET_HOURS 9  // KST (Korea Standard Time)

#endif // CONFIG_H