/*
 *  Copyright 2019 Microchip Technology Inc. and its subsidiaries
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#define _GNU_SOURCE
#ifndef AFB_BINDING_VERSION
#  define AFB_BINDING_VERSION 3
#endif

#include <stdio.h>
#include <string.h>
#include <afb/afb-binding.h>
#include <wrap-json.h>
#include "wrap-unicens.h"
#include "microphone.h"

/*****************************************************************************
 * types
 */

enum microphone_mode
{
    MICROPHONE_MODE_NONE        = 0,
    MICROPHONE_MODE_DOA         = 1,
    MICROPHONE_MODE_THINKING    = 2,
    MICROPHONE_MODE_SPEAKING    = 3,
    MICROPHONE_MODE_ERROR       = 4,
    MICROPHONE_MODE_WAKING      = 5,
    MICROPHONE_MODE_ENDING      = 6,
    MICROPHONE_MODE_CYLON       = 7,
    MICROPHONE_MODE_RAINBOW     = 8,
    MICROPHONE_MODE_WHEEL       = 9,
    MICROPHONE_MODE_UNKNOWN     = 10
};

/*****************************************************************************
 * local prototypes
 */

static int microphone_mode_set(enum microphone_mode mode);

/*****************************************************************************
 * local variables and definitions
 */

#define NODE_ID         ((uint16_t)0x520U)
#define MSG_ID_MODE     0x1001U
#define MSG_OP_SET      0x00U

#define MSG_MAX_PAYLOAD_SZ  2U
static uint8_t _tx_payload[MSG_MAX_PAYLOAD_SZ];
static bool _available = false;

/*****************************************************************************
 * functions
 */

extern void microphone_availablility_changed(uint16_t node_id, bool available) {
    if (node_id == NODE_ID) {
        AFB_API_DEBUG(afbBindingRoot, "%s: amplifier new availability=%d", __func__, available);
        _available = available;
    }
}

static int microphone_mode_set(enum microphone_mode mode) {
    AFB_API_NOTICE(afbBindingRoot, "microphone_mode_set value=%d", mode);
    if (_available == false) {
        AFB_API_NOTICE(afbBindingRoot, "%s: node is not available", __func__);
        return -1;
    }

    if  (mode < MICROPHONE_MODE_UNKNOWN) {
        _tx_payload[0] = MSG_OP_SET;
        _tx_payload[1] = (uint8_t)mode;
        wrap_ucs_sendmessage_sync(NODE_ID, MSG_ID_MODE, _tx_payload, MSG_MAX_PAYLOAD_SZ);
    }
    else {
        AFB_API_NOTICE(afbBindingRoot, "%s: given mode is unknown", __func__);
        return -1;
    }

    return 0;
}


/*****************************************************************************
 * JSON API
 */

extern void microphone_mode_set_api(afb_req_t request) {
    char *str_mode = NULL;
    struct json_object* j_obj = afb_req_json(request);

    AFB_API_NOTICE(afbBindingRoot, "UNICENS-CONTROLLER: %s:%s", __func__, json_object_get_string(j_obj));

    if (wrap_json_unpack(j_obj, "{s:s}", "value", &str_mode) == 0) {
        AFB_API_NOTICE(afbBindingRoot, "UNICENS-CONTROLLER: decoded value=%s", str_mode);
        enum microphone_mode mic_mode = MICROPHONE_MODE_UNKNOWN;

        if (strcmp(str_mode, "none") == 0) {
            mic_mode = MICROPHONE_MODE_NONE;
        }
        else if (strcmp(str_mode, "doa") == 0) {
            mic_mode = MICROPHONE_MODE_DOA;
        }
        else if (strcmp(str_mode, "thinking") == 0) {
            mic_mode = MICROPHONE_MODE_THINKING;
        }
        else if (strcmp(str_mode, "speaking") == 0) {
            mic_mode = MICROPHONE_MODE_SPEAKING;
        }
        else if (strcmp(str_mode, "error") == 0) {
            mic_mode = MICROPHONE_MODE_ERROR;
        }
        else if (strcmp(str_mode, "waking") == 0) {
            mic_mode = MICROPHONE_MODE_WAKING;
        }
        else if (strcmp(str_mode, "ending") == 0) {
            mic_mode = MICROPHONE_MODE_ENDING;
        }
        else if (strcmp(str_mode, "cylon") == 0) {
            mic_mode = MICROPHONE_MODE_CYLON;
        }
        else if (strcmp(str_mode, "rainbow") == 0) {
            mic_mode = MICROPHONE_MODE_RAINBOW;
        }
        else if (strcmp(str_mode, "wheel") == 0) {
            mic_mode = MICROPHONE_MODE_WHEEL;
        }

        if (mic_mode < MICROPHONE_MODE_UNKNOWN) {
            microphone_mode_set(mic_mode);
            afb_req_success(request, NULL, NULL);
        }
        else {
            afb_req_fail(request, "argument 'value' is not set to a known value", NULL);
        }
    }
    else {
        afb_req_fail(request, "missing argument 'value'", NULL);
    }
}