/*
 * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
 *
 * 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.
 */


#include <json-c/json.h>
#include "layout.hpp"
#include "json_helper.hpp"
#include "hmi-debug.h"


LayoutManager::LayoutManager() {
    HMI_DEBUG("wm:lm", "Call");
}

int LayoutManager::initialize() {
    HMI_DEBUG("wm:lm", "Call");

    int ret = 0;

    // Load layout.db
    ret = this->loadLayoutDb();
    if (0 > ret) {
        HMI_ERROR("wm:lm", "Load layout.db Error!!");
        return ret;
    }

    return ret;
}

compositor::rect LayoutManager::getAreaSize(const char* area) {
    return this->area2size[area];
}

extern const char* kDefaultLayoutDb;
int LayoutManager::loadLayoutDb() {
    HMI_DEBUG("wm:lm", "Call");

    // Get afm application installed dir
    char const *afm_app_install_dir = getenv("AFM_APP_INSTALL_DIR");
    HMI_DEBUG("wm:lm", "afm_app_install_dir:%s", afm_app_install_dir);

    std::string file_name;
    if (!afm_app_install_dir) {
        HMI_ERROR("wm:lm", "AFM_APP_INSTALL_DIR is not defined");
    }
    else {
        file_name = std::string(afm_app_install_dir) + std::string("/etc/layout.db");
    }

    // Load layout.db
    json_object* json_obj;
    int ret = jh::inputJsonFilie(file_name.c_str(), &json_obj);
    if (0 > ret) {
        HMI_DEBUG("wm:lm", "Could not open layout.db, so use default layout information");
        json_obj = json_tokener_parse(kDefaultLayoutDb);
    }
    HMI_DEBUG("wm:lm", "json_obj dump:%s", json_object_get_string(json_obj));

    // Perse areas
    HMI_DEBUG("wm:lm", "Perse areas");
    json_object* json_cfg;
    if (!json_object_object_get_ex(json_obj, "areas", &json_cfg)) {
        HMI_ERROR("wm:lm", "Parse Error!!");
        return -1;
    }

    int len = json_object_array_length(json_cfg);
    HMI_DEBUG("wm:lm", "json_cfg len:%d", len);
    HMI_DEBUG("wm:lm", "json_cfg dump:%s", json_object_get_string(json_cfg));

    const char* area;
    for (int i=0; i<len; i++) {
        json_object* json_tmp = json_object_array_get_idx(json_cfg, i);
        HMI_DEBUG("wm:lm", "> json_tmp dump:%s", json_object_get_string(json_tmp));

        area = jh::getStringFromJson(json_tmp, "name");
        if (nullptr == area) {
            HMI_ERROR("wm:lm", "Parse Error!!");
            return -1;
        }
        HMI_DEBUG("wm:lm", "> area:%s", area);

        json_object* json_rect;
        if (!json_object_object_get_ex(json_tmp, "rect", &json_rect)) {
          HMI_ERROR("wm:lm", "Parse Error!!");
          return -1;
        }
        HMI_DEBUG("wm:lm", "> json_rect dump:%s", json_object_get_string(json_rect));

        compositor::rect area_size;
        area_size.x = jh::getIntFromJson(json_rect, "x");
        area_size.y = jh::getIntFromJson(json_rect, "y");
        area_size.w = jh::getIntFromJson(json_rect, "w");
        area_size.h = jh::getIntFromJson(json_rect, "h");

        this->area2size[area] = area_size;
    }

    // Check
    for(auto itr = this->area2size.begin();
      itr != this->area2size.end(); ++itr) {
        HMI_DEBUG("wm:lm", "area:%s x:%d y:%d w:%d h:%d",
                  itr->first.c_str(), itr->second.x, itr->second.y,
                  itr->second.w, itr->second.h);
    }

    // Release json_object
    json_object_put(json_obj);

    return 0;
}

const char* kDefaultLayoutDb = "{ \
    \"layouts\": [ \
        { \
            \"name\": \"pu\", \
            \"layer\": \"on_screen\", \
            \"areas\": [ \
                { \
                    \"name\": \"pop_up\", \
                    \"role\": \"incomming_call\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"sa\", \
            \"layer\": \"on_screen\", \
            \"areas\": [ \
                { \
                    \"name\": \"system_alert\", \
                    \"role\": \"system_alert\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"m1\", \
            \"layer\": \"apps\", \
            \"areas\": [ \
                { \
                    \"name\": \"normal\", \
                    \"role\": \"map\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"m2\", \
            \"layer\": \"apps\", \
            \"areas\": [ \
                { \
                    \"name\": \"split.main\", \
                    \"role\": \"map\" \
                }, \
                { \
                    \"name\": \"split.sub\", \
                    \"category\": \"hvac\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"mf\", \
            \"layer\": \"apps\", \
            \"areas\": [ \
                { \
                    \"name\": \"full\", \
                    \"role\": \"map\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"s1\", \
            \"layer\": \"apps\", \
            \"areas\": [ \
                { \
                    \"name\": \"normal\", \
                    \"category\": \"splitable\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"s2\", \
            \"layer\": \"apps\", \
            \"areas\": [ \
                { \
                    \"name\": \"split.main\", \
                    \"category\": \"splitable\" \
                }, \
                { \
                    \"name\": \"split.sub\", \
                    \"category\": \"splitable\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"g\", \
            \"layer\": \"apps\", \
            \"areas\": [ \
                { \
                    \"name\": \"normal\", \
                    \"category\": \"general\" \
                } \
            ] \
        }, \
        { \
            \"name\": \"hs\", \
            \"layer\": \"homescreen\", \
            \"areas\": [ \
                { \
                    \"name\": \"full\", \
                    \"role\": \"homescreen\" \
                } \
            ] \
        } \
    ], \
    \"areas\": [ \
        { \
            \"name\": \"normal\", \
            \"rect\": { \
                \"x\": 0, \
                \"y\": 218, \
                \"w\": 1080, \
                \"h\": 1488 \
            } \
        }, \
        { \
            \"name\": \"split.main\", \
            \"rect\": { \
                \"x\": 0, \
                \"y\": 218, \
                \"w\": 1080, \
                \"h\": 744 \
            } \
        }, \
        { \
            \"name\": \"split.sub\", \
            \"rect\": { \
                \"x\": 0, \
                \"y\": 962, \
                \"w\": 1080, \
                \"h\": 744 \
            } \
        }, \
        { \
            \"name\": \"full\", \
            \"rect\": { \
                \"x\": 0, \
                \"y\": 0, \
                \"w\": 1080, \
                \"h\": 1920 \
            } \
        }, \
        { \
            \"name\": \"pop_up\", \
            \"rect\": { \
                \"x\": 0, \
                \"y\": 640, \
                \"w\": 1080, \
                \"h\": 640 \
            } \
        }, \
        { \
            \"name\": \"system_alert\", \
            \"rect\": { \
                \"x\": 0, \
                \"y\": 640, \
                \"w\": 1080, \
                \"h\": 640 \
            } \
        } \
    ] \
}";