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

const char* gStmEventName[] = {
    "activate",
    "deactivate",
    "parking_brake_off",
    "parking_brake_on",
    "car_stop",
    "car_run",
    "timer_expired",
    "lamp_off",
    "lamp_on"
};

const int gStmEventNo[] = {
    STM_EVT_NO_ACTIVATE,
    STM_EVT_NO_DEACTIVATE,
    STM_EVT_NO_PARKING_BRAKE_OFF,
    STM_EVT_NO_PARKING_BRAKE_ON,
    STM_EVT_NO_CAR_STOP,
    STM_EVT_NO_CAR_RUN,
    STM_EVT_NO_TIMER_EXPIRED,
    STM_EVT_NO_LAMP_OFF,
    STM_EVT_NO_LAMP_ON
};

const char* gStmCategoryName[] = {
    "homescreen",
    "map",
    "general",
    "splitable",
    "popup",
    "system_alert",
    "restriction",
};

const int gStmCategoryNo[] = {
    STM_CTG_NO_HOMESCREEN,
    STM_CTG_NO_MAP,
    STM_CTG_NO_GENERAL,
    STM_CTG_NO_SPLITABLE,
    STM_CTG_NO_POPUP,
    STM_CTG_NO_SYSTEM_ALERT,
    STM_CTG_NO_RESTRICTION,
};

const char* gStmAreaName[] = {
    "full",
    "normal",
    "split.main",
    "split.sub",
    "onscreen",
    "restriction.normal",
    "restriction.split.main",
    "restriction.split.sub",
};

const int gStmAreaNo[] = {
    STM_ARA_NO_FULL,
    STM_ARA_NO_NORMAL,
    STM_ARA_NO_SPLIT_MAIN,
    STM_ARA_NO_SPLIT_SUB,
    STM_ARA_NO_ON_SCREEN,
    STM_ARA_NO_RESTRICTION_NORMAL,
    STM_ARA_NO_RESTRICTION_SPLIT_MAIN,
    STM_ARA_NO_RESTRICTION_SPLIT_SUB,
};

// String for state
const char* gStmParkingBrakeStateNo2Name[] = {
    "parking_brake_off",
    "parking_brake_on"
};

const char* gStmCarStateNo2Name[] = {
    "car_stop",
    "car_run"
};

const char* gStmLampStateNo2Name[] = {
    "lamp_off",
    "lamp_on"
};

const char* gStmLayoutNo2Name[] = {
    "none",
    "pu",
    "sa",
    "m1",
    "m2",
    "mf",
    "s1",
    "s2",
    "g",
    "hs",
    "restriction",
    "restriction.split.main",
    "restriction.split.sub",
};

stm_state_t g_crr_state;
stm_state_t g_prv_state;
int g_prv_apps_state_car_stop = 0;

void stmInitialize() {
    // Initialize previous state
    memset(&g_prv_state, 0, sizeof(g_prv_state));

    g_prv_state.layer.on_screen.state   = gStmLayoutNoNone;
    g_prv_state.layer.restriction.state = gStmLayoutNoNone;
    g_prv_state.layer.apps.state        = gStmLayoutNoNone;
    g_prv_state.layer.homescreen.state  = gStmLayoutNoNone;
    g_prv_state.parking_brake.state = gStmParkingBrakeStateNoOn;
    g_prv_state.car.state           = gStmCarStateNoStop;
    g_prv_state.lamp.state          = gStmLampStateNoOff;

    // Initialize current state
    g_crr_state = g_prv_state;
}

int stmTransitionState(int event, stm_state_t* state) {
    int event_no, category_no, area_no;
    int restriction_state, apps_state, parking_brake_state, car_state, lamp_state;

    event_no    = event & STM_MSK_EVT_NO;
    category_no = event & STM_MSK_CTG_NO;
    area_no     = event & STM_MSK_ARA_NO;

    // Backup previous state
    g_prv_state = g_crr_state;

    // Get previous state
    restriction_state = g_prv_state.layer.restriction.state;
    apps_state = g_prv_state.layer.apps.state;
    parking_brake_state  = g_prv_state.parking_brake.state;
    car_state  = g_prv_state.car.state;
    lamp_state = g_prv_state.lamp.state;

    // Clear flags
    g_crr_state.layer.on_screen.is_changed = STM_FALSE;
    g_crr_state.layer.restriction.is_changed = STM_FALSE;
    g_crr_state.layer.apps.is_changed = STM_FALSE;
    g_crr_state.layer.homescreen.is_changed = STM_FALSE;
    g_crr_state.parking_brake.is_changed = STM_FALSE;
    g_crr_state.car.is_changed = STM_FALSE;
    g_crr_state.lamp.is_changed = STM_FALSE;

    switch (event_no) {
    case STM_EVT_NO_ACTIVATE:
        switch (category_no) {
        case STM_CTG_NO_HOMESCREEN:
            // Apps layer
            g_crr_state.layer.apps.state = gStmLayoutNoNone;
            g_crr_state.layer.apps.is_changed = STM_TRUE;

            // Homescreen layer
            g_crr_state.layer.homescreen.state = gStmLayoutNoHs;
            g_crr_state.layer.homescreen.is_changed = STM_TRUE;
            break;
        case STM_CTG_NO_MAP:
            switch (area_no) {
            case STM_ARA_NO_FULL:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoMf:
                    // nop
                    break;
                default:
                    g_crr_state.layer.apps.state = gStmLayoutNoMf;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                }
                break;
            case STM_ARA_NO_NORMAL:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoM1:
                    // nop
                    break;
                case gStmLayoutNoS1:
                    g_crr_state.layer.apps.state = gStmLayoutNoM2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                default:
                    g_crr_state.layer.apps.state = gStmLayoutNoM1;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                }
                break;
            case STM_ARA_NO_SPLIT_MAIN:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoS1:
                case gStmLayoutNoS2:
                    g_crr_state.layer.apps.state = gStmLayoutNoS2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                default:
                    // nop
                    break;
                }
                break;
            }
            break;
        case STM_CTG_NO_GENERAL:
            switch (area_no) {
            case STM_ARA_NO_NORMAL:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoMf:
                    // nop
                    break;
                default:
                    g_crr_state.layer.apps.state = gStmLayoutNoG;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                }
                break;
            default:
                // nop
                break;
            }
            break;
        case STM_CTG_NO_SPLITABLE:
            switch (area_no) {
            case STM_ARA_NO_NORMAL:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoM1:
                    g_crr_state.layer.apps.state = gStmLayoutNoM2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                case gStmLayoutNoMf:
                case gStmLayoutNoS1:
                    // nop
                    break;
                default:
                    g_crr_state.layer.apps.state = gStmLayoutNoS1;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                }
                break;
            case STM_ARA_NO_SPLIT_MAIN:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoS1:
                    g_crr_state.layer.apps.state = gStmLayoutNoS2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                case gStmLayoutNoS2:
                    g_crr_state.layer.apps.state = gStmLayoutNoS2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                default:
                    // nop
                    break;
                }
                break;
            case STM_ARA_NO_SPLIT_SUB:
                // Apps layer
                switch (apps_state) {
                case gStmLayoutNoM1:
                    g_crr_state.layer.apps.state = gStmLayoutNoM2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                case gStmLayoutNoM2:
                    g_crr_state.layer.apps.state = gStmLayoutNoM2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                case gStmLayoutNoS1:
                    g_crr_state.layer.apps.state = gStmLayoutNoS2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                case gStmLayoutNoS2:
                    g_crr_state.layer.apps.state = gStmLayoutNoS2;
                    g_crr_state.layer.apps.is_changed = STM_TRUE;
                    break;
                default:
                    // nop
                    break;
                }
                break;
            default:
                // nop
                break;
            }
            break;
        case STM_CTG_NO_RESTRICTION:
            switch (area_no) {
            case STM_ARA_NO_RESTRICTION_NORMAL:
                // restriction Layer
                switch (restriction_state) {
                case gStmLayoutNoNone:
                    g_crr_state.layer.restriction.state = gStmLayoutNoRestriction;
                    g_crr_state.layer.restriction.is_changed = STM_TRUE;
                    break;
                default:
                    // nop
                    break;
                }
                break;
            case STM_ARA_NO_RESTRICTION_SPLIT_MAIN:
                // restriction Layer
                switch (restriction_state) {
                case gStmLayoutNoNone:
                    g_crr_state.layer.restriction.state = gStmLayoutNoRestrictionSplitMain;
                    g_crr_state.layer.restriction.is_changed = STM_TRUE;
                    break;
                default:
                    // nop
                    break;
                }
                break;
            case STM_ARA_NO_RESTRICTION_SPLIT_SUB:
                // restriction Layer
                switch (restriction_state) {
                case gStmLayoutNoNone:
                    g_crr_state.layer.restriction.state = gStmLayoutNoRestrictionSplitSub;
                    g_crr_state.layer.restriction.is_changed = STM_TRUE;
                    break;
                default:
                    // nop
                    break;
                }
                break;
            default:
                // nop
                break;
            }
            break;
        default:
            // nop
            break;
        }
    case STM_EVT_NO_DEACTIVATE:
        switch (category_no) {
        case STM_CTG_NO_RESTRICTION:
            // restriction Layer
            switch (restriction_state) {
            case gStmLayoutNoRestriction:
            case gStmLayoutNoRestrictionSplitMain:
            case gStmLayoutNoRestrictionSplitSub:
                g_crr_state.layer.restriction.state = gStmLayoutNoNone;
                g_crr_state.layer.restriction.is_changed = STM_TRUE;
                break;
            default:
                // nop
                break;
            }
        default:
            // nop
            break;
        }
        break;
    case STM_EVT_NO_PARKING_BRAKE_OFF:
        if (gStmParkingBrakeStateNoOff != parking_brake_state) {
            g_crr_state.parking_brake.state = gStmParkingBrakeStateNoOff;
            g_crr_state.parking_brake.is_changed = STM_TRUE;
        }
        break;
    case STM_EVT_NO_PARKING_BRAKE_ON:
        if (gStmParkingBrakeStateNoOn != parking_brake_state) {
            g_crr_state.parking_brake.state = gStmParkingBrakeStateNoOn;
            g_crr_state.parking_brake.is_changed = STM_TRUE;
        }
        break;
    case STM_EVT_NO_CAR_STOP:
        if (gStmCarStateNoStop != car_state) {
            g_crr_state.layer.apps.state = g_prv_apps_state_car_stop;
            g_crr_state.layer.apps.is_changed = STM_TRUE;

            g_crr_state.car.state = gStmCarStateNoStop;
            g_crr_state.car.is_changed = STM_TRUE;
        }
        break;
    case STM_EVT_NO_CAR_RUN:
        if (gStmCarStateNoRun != car_state) {
            g_prv_apps_state_car_stop = apps_state;
            g_crr_state.layer.apps.state = gStmLayoutNoM1;
            g_crr_state.layer.apps.is_changed = STM_TRUE;

            g_crr_state.car.state = gStmCarStateNoRun;
            g_crr_state.car.is_changed = STM_TRUE;
        }
        break;
    case STM_EVT_NO_LAMP_OFF:
        if (gStmLampStateNoOff != lamp_state) {
            g_crr_state.lamp.state = gStmLampStateNoOff;
            g_crr_state.lamp.is_changed = STM_TRUE;
        }
        break;
    case STM_EVT_NO_LAMP_ON:
        if (gStmLampStateNoOn != lamp_state) {
            g_crr_state.lamp.state = gStmLampStateNoOn;
            g_crr_state.lamp.is_changed = STM_TRUE;
        }
        break;
    default:
        // nop
        break;
    }

    // Copy current state for return
    memcpy(state, &g_crr_state, sizeof(g_crr_state));

    return 0;
}