#include "zigbee_zcl.h"
#include <string.h>

// Static storage for ZCL attributes
static zcl_thermostat_attrs_t zcl_attrs = {
    .local_temperature = 0,      // 0.0°C
    .system_mode = 0,            // Off
    .control_sequence = 0        // Default sequence
};

/**
 * @brief Initialize Zigbee stack and ZCL Thermostat cluster
 * @return true if initialization successful, false otherwise
 */
bool zigbee_zcl_init(void) {
    // Initialize ZCL attributes to default values
    zcl_attrs.local_temperature = 0;      // 0.0°C
    zcl_attrs.system_mode = 0;            // Off
    zcl_attrs.control_sequence = 0;       // Default sequence

    // In a real implementation, this would initialize the actual Zigbee stack
    // For now, we'll return true to indicate successful initialization
    return true;
}

/**
 * @brief Handle incoming Zigbee ZCL commands
 * @param endpoint Endpoint ID
 * @param cluster_id Cluster ID
 * @param command_id Command ID
 * @param payload Command payload
 * @param payload_length Length of payload
 * @return true if command processed successfully
 */
bool zigbee_zcl_handle_command(uint8_t endpoint, uint16_t cluster_id,
                              uint8_t command_id, const uint8_t* payload,
                              uint16_t payload_length) {
    // Check if this is the Thermostat cluster (0x0201)
    if (cluster_id != 0x0201) {
        return false;
    }

    // Validate payload - NULL payload is never valid for commands
    if (payload == NULL) {
        return false;
    }

    // Handle based on command ID
    switch (command_id) {
        case 0x00: // Setpoint raise/lower
            // Implementation would go here
            break;
        case 0x01: // Setpoint raise/lower percentage
            // Implementation would go here
            break;
        case 0x02: // Setpoint set with occupancy
            // Implementation would go here
            break;
        default:
            return false;
    }

    return true;
}

/**
 * @brief Set local temperature attribute
 * @param temperature Temperature in 0.01°C units
 */
void zigbee_zcl_set_local_temperature(int16_t temperature) {
    zcl_attrs.local_temperature = temperature;
}

/**
 * @brief Get local temperature attribute
 * @return Current temperature in 0.01°C units
 */
int16_t zigbee_zcl_get_local_temperature(void) {
    return zcl_attrs.local_temperature;
}

/*
 * @brief Set system mode attribute
 * @param mode System mode (0=Off, 1=Auto, 3=Cool, 4=Heat)
 */
void zigbee_zcl_set_system_mode(uint8_t mode) {
    // Validate mode value
    if (mode == 0 || mode == 1 || mode == 3 || mode == 4) {
        zcl_attrs.system_mode = mode;
    }
    // Invalid modes are ignored
}

/**
 * @brief Get system mode attribute
 * @return Current system mode
 */
uint8_t zigbee_zcl_get_system_mode(void) {
    return zcl_attrs.system_mode;
}

/**
 * @brief Handle weekly schedule commands
 * @param command_id Schedule command ID
 * @param payload Schedule payload
 * @param payload_length Length of payload
 * @return true if command processed successfully
 */
bool zigbee_zcl_handle_schedule_command(uint8_t command_id,
                                       const uint8_t* payload,
                                       uint16_t payload_length) {
    // Validate payload - NULL payload is only invalid if length > 0
    if (payload == NULL && payload_length > 0) {
        return false;
    }

    // Schedule command handling would go here
    // For now, we'll just acknowledge receipt of the command
    return true;
}