config.h

#ifndef CONFIG_H
#define CONFIG_H

// =============================================================================
// BOARD CONFIGURATION - Must be defined before camera includes
// =============================================================================
#define CAMERA_MODEL_XIAO_ESP32S3 // Define camera model for Seeed Xiao ESP32S3
#define BOARD_HAS_PSRAM           // Enable PSRAM support
#define CONFIG_ARDUHAL_ESP_LOG    // Enable Arduino HAL logging

// =============================================================================
// DEVICE CONFIGURATION
// =============================================================================
#define BLE_DEVICE_NAME "OMI Glass"
#define FIRMWARE_VERSION_STRING "2.3.2"
#define HARDWARE_REVISION "ESP32-S3-v1.0"
#define MANUFACTURER_NAME "Based Hardware"

// =============================================================================
// POWER MANAGEMENT - Optimized for MINIMUM 6-8 hours, targeting 10+ hours
// =============================================================================
// CPU Frequency Management - Aggressive power optimization
#define MAX_CPU_FREQ_MHZ 100   // Further reduced from 120MHz - still sufficient
#define MIN_CPU_FREQ_MHZ 40    // Ultra-low power for idle states
#define NORMAL_CPU_FREQ_MHZ 80 // Normal operation frequency (good balance)

// Sleep Management
#define LIGHT_SLEEP_DURATION_US 50000  // 50ms light sleep intervals
#define DEEP_SLEEP_THRESHOLD_MS 300000 // 5 minutes of inactivity triggers deep sleep
#define IDLE_THRESHOLD_MS 45000        // 45 seconds to enter power save mode (was 30s)

// Battery Configuration - Dual 250mAh @ 3.5V-4.1V under load (500mAh total)
#define BATTERY_MAX_VOLTAGE 4.2f      // 4.2V fully charged (under load)
#define BATTERY_MIN_VOLTAGE 3.2f      // 3.2V empty (under load)
#define BATTERY_CRITICAL_VOLTAGE 3.3f // Emergency shutdown voltage
#define BATTERY_LOW_VOLTAGE 3.4f      // Low battery warning
#define VOLTAGE_DIVIDER_RATIO 6.086f  // Calibrated to match multimeter readings (load-compensated)

// Battery Monitoring - Extended intervals for power savings
#define BATTERY_REPORT_INTERVAL_MS 90000 // 1.5 minute reporting (was 60s)
#define BATTERY_TASK_INTERVAL_MS 20000   // 20 second internal checks (was 15s)
#define BATTERY_ADC_PIN 2                // GPIO2 (A1) - voltage divider connection

// =============================================================================
// CAMERA CONFIGURATION - Power optimized for 6-8 hour battery life
// =============================================================================
#define CAMERA_FRAME_SIZE FRAMESIZE_VGA // 640x480 - optimal balance
#define CAMERA_JPEG_QUALITY 25          // Slightly higher quality for better compression efficiency
#define CAMERA_XCLK_FREQ 6000000        // 6MHz - reduced from 8MHz for power savings
#define CAMERA_FB_IN_PSRAM CAMERA_FB_IN_PSRAM
#define CAMERA_GRAB_LATEST CAMERA_GRAB_LATEST

// Fixed Photo Capture Interval - Optimized for 6-8 hour operation
#define PHOTO_CAPTURE_INTERVAL_MS 30000 // Fixed 30 second interval
#define CAMERA_TASK_INTERVAL_MS 2000    // 2 second task check
#define CAMERA_TASK_STACK_SIZE 3072     // Reduced stack size
#define CAMERA_TASK_PRIORITY 2

// Camera Power Management - Reduce power cycling
#define CAMERA_POWER_DOWN_DELAY_MS 60000 // Power down camera after 60s idle (was 8s)

// =============================================================================
// IMAGE ORIENTATION
// =============================================================================
typedef enum {
    ORIENTATION_0_DEGREES = 0,   // Normal
    ORIENTATION_90_DEGREES = 1,  // Rotated right
    ORIENTATION_180_DEGREES = 2, // Upside down
    ORIENTATION_270_DEGREES = 3  // Rotated left
} image_orientation_t;

// The device is mounted upside down, so we need to rotate 180 degrees.
#define FIXED_IMAGE_ORIENTATION ORIENTATION_180_DEGREES

// =============================================================================
// BLE CONFIGURATION - Power optimized for extended battery life
// =============================================================================
#define BLE_MTU_SIZE 517            // Maximum MTU for efficiency
#define BLE_CHUNK_SIZE 500          // Safe chunk size for photo transfer
#define BLE_PHOTO_TRANSFER_DELAY 3  // Fast transfer for connection stability
#define BLE_TX_POWER ESP_PWR_LVL_N0 // Low power for 6+ hour battery life

// Power-optimized BLE Advertising - Longer intervals for power savings
#define BLE_ADV_MIN_INTERVAL 0x0140  // 200ms minimum (was 160ms)
#define BLE_ADV_MAX_INTERVAL 0x0280  // 400ms maximum (was 320ms)
#define BLE_ADV_TIMEOUT_MS 0         // Never stop advertising (always discoverable)
#define BLE_SLEEP_ADV_INTERVAL 45000 // Re-advertise every 45 seconds when not connected (was 30s)

// Connection Management - Stable connections with power optimization
#define BLE_CONNECTION_TIMEOUT_MS 0 // Never timeout connections (disable auto-disconnect)
#define BLE_TASK_INTERVAL_MS 20000  // 20 second connection check (was 15s)
#define BLE_TASK_STACK_SIZE 2048
#define BLE_TASK_PRIORITY 1

// Connection Parameters for Stable Connections with Power Optimization
#define BLE_CONN_MIN_INTERVAL 20 // 25ms minimum connection interval (was 20ms)
#define BLE_CONN_MAX_INTERVAL 40 // 50ms maximum connection interval (was 40ms)
#define BLE_CONN_LATENCY 0       // No latency for immediate response
#define BLE_CONN_TIMEOUT 800     // 8 second supervision timeout

// =============================================================================
// POWER STATES
// =============================================================================
typedef enum {
    POWER_STATE_ACTIVE,      // Normal operation - camera + BLE active
    POWER_STATE_POWER_SAVE,  // Reduced frequency, longer intervals
    POWER_STATE_LOW_BATTERY, // Minimal operation
    POWER_STATE_SLEEP        // Deep sleep mode
} power_state_t;

// =============================================================================
// TASK CONFIGURATION - Optimized stack sizes
// =============================================================================
#define BATTERY_TASK_STACK_SIZE 2048
#define BATTERY_TASK_PRIORITY 1
#define POWER_MANAGEMENT_TASK_STACK_SIZE 2048
#define POWER_MANAGEMENT_TASK_PRIORITY 0

// Status Reporting - Power optimized
#define STATUS_REPORT_INTERVAL_MS 120000 // 2 minutes (was 30 seconds)

// =============================================================================
// MICROPHONE CONFIGURATION - I2S PDM (XIAO ESP32S3 Sense built-in mic)
// =============================================================================
// XIAO ESP32S3 Sense has built-in PDM microphone
#define MIC_CLK_PIN 42  // PDM Clock pin (GPIO42)
#define MIC_DATA_PIN 41 // PDM Data pin (GPIO41)

#define MIC_SAMPLE_RATE 16000          // 16kHz sample rate
#define MIC_BUFFER_SAMPLES 1600        // 100ms buffer (16000 * 0.1)
#define MIC_GAIN 2                     // Microphone gain multiplier
#define AUDIO_RING_BUFFER_SAMPLES 8000 // 500ms of audio data

// =============================================================================
// OPUS CODEC CONFIGURATION
// =============================================================================
#define AUDIO_CODEC_ID 21              // Opus codec ID (matches Omi protocol)
#define OPUS_FRAME_SAMPLES 320         // 20ms frame @ 16kHz
#define OPUS_OUTPUT_MAX_BYTES 160      // Max encoded frame size
#define OPUS_BITRATE 32000             // 32kbps
#define OPUS_COMPLEXITY 3              // Encoding complexity (1-10)
#define OPUS_VBR 1                     // Variable bitrate enabled

// Audio BLE packet configuration
#define AUDIO_PACKET_HEADER_SIZE 3     // 2 bytes index + 1 byte sub-index
#define AUDIO_TX_RING_BUFFER_SIZE 16   // Number of encoded frames to buffer

// =============================================================================
// BLE UUID DEFINITIONS - OMI Protocol
// =============================================================================
#define OMI_SERVICE_UUID "19B10000-E8F2-537E-4F6C-D104768A1214"
#define AUDIO_DATA_UUID "19B10001-E8F2-537E-4F6C-D104768A1214"
#define AUDIO_CODEC_UUID "19B10002-E8F2-537E-4F6C-D104768A1214"
#define PHOTO_DATA_UUID "19B10005-E8F2-537E-4F6C-D104768A1214"
#define PHOTO_CONTROL_UUID "19B10006-E8F2-537E-4F6C-D104768A1214"

// Battery Service UUID - Cast to uint16_t for BLE compatibility
#define BATTERY_SERVICE_UUID (uint16_t) 0x180F
#define BATTERY_LEVEL_UUID (uint16_t) 0x2A19

// OTA Service UUIDs
#define OTA_SERVICE_UUID "19B10010-E8F2-537E-4F6C-D104768A1214"
#define OTA_CONTROL_UUID "19B10011-E8F2-537E-4F6C-D104768A1214"  // Write commands, read status
#define OTA_DATA_UUID "19B10012-E8F2-537E-4F6C-D104768A1214"     // Notifications for progress

// OTA Commands (written to OTA_CONTROL_UUID)
#define OTA_CMD_SET_WIFI 0x01       // Set WiFi credentials: [cmd, ssid_len, ssid..., pass_len, pass...]
#define OTA_CMD_START_OTA 0x02      // Start OTA update: [cmd, url_len, url...]
#define OTA_CMD_CANCEL_OTA 0x03     // Cancel ongoing OTA
#define OTA_CMD_GET_STATUS 0x04     // Request current status
#define OTA_CMD_SET_URL 0x05        // Set firmware URL: [cmd, url_len, url...]

// OTA Status codes (notified via OTA_DATA_UUID)
#define OTA_STATUS_IDLE 0x00
#define OTA_STATUS_WIFI_CONNECTING 0x10
#define OTA_STATUS_WIFI_CONNECTED 0x11
#define OTA_STATUS_WIFI_FAILED 0x12
#define OTA_STATUS_DOWNLOADING 0x20      // Followed by progress byte (0-100)
#define OTA_STATUS_DOWNLOAD_COMPLETE 0x21
#define OTA_STATUS_DOWNLOAD_FAILED 0x22
#define OTA_STATUS_INSTALLING 0x30       // Followed by progress byte (0-100)
#define OTA_STATUS_INSTALL_COMPLETE 0x31
#define OTA_STATUS_INSTALL_FAILED 0x32
#define OTA_STATUS_REBOOTING 0x40
#define OTA_STATUS_ERROR 0xFF

// WiFi Configuration
#define WIFI_CONNECT_TIMEOUT_MS 15000    // 15 seconds to connect
#define WIFI_MAX_SSID_LEN 32
#define WIFI_MAX_PASS_LEN 64
#define OTA_MAX_URL_LEN 256

// =============================================================================
// PIN DEFINITIONS (from camera_pins.h integration)
// =============================================================================
#ifdef CAMERA_MODEL_XIAO_ESP32S3
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 10
#define SIOD_GPIO_NUM 40
#define SIOC_GPIO_NUM 39
#define Y9_GPIO_NUM 48
#define Y8_GPIO_NUM 11
#define Y7_GPIO_NUM 12
#define Y6_GPIO_NUM 14
#define Y5_GPIO_NUM 16
#define Y4_GPIO_NUM 18
#define Y3_GPIO_NUM 17
#define Y2_GPIO_NUM 15
#define VSYNC_GPIO_NUM 38
#define HREF_GPIO_NUM 47
#define PCLK_GPIO_NUM 13

// Power Button and LED Control
#define POWER_BUTTON_PIN 1 // Custom button (GPIO1/A0) - power on/off
#define STATUS_LED_PIN 21  // User LED (GPIO21) - status indicator
#endif

// =============================================================================
// POWER BUTTON & LED CONFIGURATION
// =============================================================================
// Button Configuration
#define BUTTON_DEBOUNCE_MS 50       // Button debounce time
#define POWER_OFF_PRESS_MS 2000     // Long press duration for power off (2 seconds)
#define BOOT_COMPLETE_DELAY_MS 3000 // LED indication during boot

// LED Status Patterns (in milliseconds)
#define LED_BOOT_BLINK_FAST 200     // Fast blink during boot
#define LED_BATTERY_LOW_BLINK 1000  // Slow blink for low battery
#define LED_SLEEP_BLINK 5000        // Very slow blink in deep sleep mode
#define LED_PHOTO_CAPTURE_FLASH 100 // Quick flash during photo capture

// Deep Sleep Configuration
#define DEEP_SLEEP_BUTTON_WAKEUP 1    // Enable button wake-up from deep sleep
#define POWER_OFF_SLEEP_DELAY_MS 1000 // Delay before entering deep sleep after power off

// Power Button States
typedef enum { BUTTON_IDLE, BUTTON_PRESSED, BUTTON_LONG_PRESS, BUTTON_RELEASED } button_state_t;

// LED Status Modes
typedef enum {
    LED_OFF,
    LED_ON,
    LED_BOOT_SEQUENCE,
    LED_NORMAL_OPERATION,
    LED_LOW_BATTERY,
    LED_PHOTO_CAPTURE,
    LED_POWER_OFF_SEQUENCE,
    LED_SLEEP_MODE
} led_status_t;

// Device Power States
typedef enum {
    DEVICE_BOOTING,
    DEVICE_ACTIVE,
    DEVICE_POWER_SAVE,
    DEVICE_LOW_BATTERY,
    DEVICE_POWERING_OFF,
    DEVICE_SLEEP
} device_state_t;

#endif // CONFIG_H