/* copyright Constantin Fürst 2021, licensed under GPLv3, a copy is provided in LICENSE */
/* non-major portions of the code were taken from DWM (https://dwm.suckless.org) */
/* inspired and named after keym by Chris Willcocks (https://github.com/cwkx/keym) */

#include "typedefs.h"

#include <stdint.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/extensions/XTest.h>

extern keym_state state;

/* internally-linked helpers */

extern void set_x_update(uint32_t tv_usec);

static inline int enum_to_mouse_button(unsigned int val) {
    switch (val) {
        case MB_Left: return 1;
        case MB_Right: return 3;
        case MB_Middle: return 2;
        case MB_Back: return 8;
        case MB_Forward: return 9;
        default: return 0;
    }
}

static inline uint32_t state_released(const uint32_t* a) {
    return (*a & KEY_RELEASE_MASK) >> 31;
}

static inline uint32_t state_demasker(const uint32_t* a) {
    return *a & (~KEY_RELEASE_MASK);
}

static inline int enum_to_scroll_button(uint32_t val) {
    switch(val) {
        case SD_Up: return 4;
        case SD_Down: return 5;
        default: return 0;
    }
}

/* actual key-actions following */

void mouse_click(const uint32_t* a) {
    XTestFakeButtonEvent(state.display, enum_to_mouse_button(state_demasker(a)), !state_released(a), CurrentTime);
}

void mouse_move(const uint32_t* a) {
    const unsigned int released = state_released(a);

    switch (state_demasker(a)) {
        case MM_Up: state.y = released ? 0 : -1; break;
        case MM_Down: state.y = released ? 0 : 1; break;
        case MM_Left: state.x = released ? 0 : -1; break;
        case MM_Right: state.x = released ? 0 : 1; break;
        default: break;
    }
}

void mouse_scroll(const uint32_t* a) {
    if (!state_released(a)) {
      set_x_update(500 * speeds[state.speed]);
      XTestFakeButtonEvent(state.display, enum_to_scroll_button(state_demasker(a)), True, 1);
      XTestFakeButtonEvent(state.display, enum_to_scroll_button(state_demasker(a)), False, 1);
      set_x_update(speeds[state.speed]);
    }
}

void control_action(const uint32_t* a) {
    const unsigned int released = state_released(a);

    switch (state_demasker(a)) {
        case CA_QUIT_APPLICATION: state.quit = True;
        case CA_SPEED_HIGH: state.speed = released ? 1 : 0; break;
        case CA_SPEED_LOW: state.speed = released ? 1 : 2; break;
        default: break;
    }
}