/*
 * Copyright © 2011 Red Hat, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of Red Hat
 * not be used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.  Red
 * Hat makes no representations about the suitability of this software
 * for any purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors:
 *      Peter Hutterer
 */

#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <assert.h>

#include "synaptics.h"
#include "synapticsstr.h"
#include "eventcomm.h"

#define ArrayLength(a) (sizeof(a) / (sizeof((a)[0])))

int fd_read, fd_write;

/* A syn event, always handy to have */
struct input_event syn = { {0, 0}, EV_SYN, SYN_REPORT, 0 };

static void
create_pipe_fd(void)
{
    int pipefd[2];

    assert(pipe(pipefd) != -1);

    fd_read = pipefd[0];
    fd_write = pipefd[1];
}

static void
reset_data(struct SynapticsHwState **hw, struct CommData *comm,
           SynapticsPrivate * priv)
{
    SynapticsHwStateFree(&comm->hwState);
    memset(comm, 0, sizeof(struct CommData));
    SynapticsHwStateFree(hw);
    *hw = SynapticsHwStateAlloc(priv);
    comm->hwState = SynapticsHwStateAlloc(priv);
}

/**
 * Write n input events to fd, followed by the syn event.
 */
static void
write_event(int fd, struct input_event *ev, int n)
{
    write(fd, ev, sizeof(struct input_event) * n);
    write(fd, &syn, sizeof(syn));
}

static void
test_buttons(int fd, InputInfoPtr pInfo, struct CommData *comm)
{
    SynapticsPrivate *priv = (SynapticsPrivate *) pInfo->private;
    struct SynapticsHwState *hw = NULL;
    struct input_event ev = { {0, 0}, EV_KEY, 0, 0 };

    reset_data(&hw, comm, priv);

#define _test_press_release(_code, field)       \
        ev.code = (_code);                      \
        ev.value = 1;                           \
        write_event(fd, &ev, 1);                \
        EventReadHwState(pInfo, comm, hw);      \
        assert(hw->field == 1);                 \
        ev.value = 0; /* button release */      \
        write_event(fd_write, &ev, 1);          \
        EventReadHwState(pInfo, comm, hw);      \
        assert(hw->field == 0);

    _test_press_release(BTN_LEFT, left);
    _test_press_release(BTN_RIGHT, right);
    _test_press_release(BTN_MIDDLE, middle);
    _test_press_release(BTN_FORWARD, up);
    _test_press_release(BTN_BACK, down);
    _test_press_release(BTN_0, multi[0]);
    _test_press_release(BTN_1, multi[1]);
    _test_press_release(BTN_2, multi[2]);
    _test_press_release(BTN_3, multi[3]);
    _test_press_release(BTN_4, multi[4]);
    _test_press_release(BTN_5, multi[5]);
    _test_press_release(BTN_6, multi[6]);
    _test_press_release(BTN_7, multi[7]);

    SynapticsHwStateFree(&hw);
}

/**
 * This test checks that the recognised event fields set the right hardware
 * state. It's a fairly limited test and does not check whether any of the
 * others change the HW state at all.
 */
static void
test_read_hw_state(void)
{
    InputInfoRec info = { 0 };
    SynapticsPrivate private;
    struct SynapticsHwState *hw = NULL;
    struct CommData comm = { 0 };

    struct input_event ev[] = {
        {{0, 0}, EV_KEY, BTN_TOOL_FINGER, 1},
        {{0, 0}, EV_KEY, BTN_TOOL_DOUBLETAP, 1},
        {{0, 0}, EV_KEY, BTN_TOOL_TRIPLETAP, 1},
        {{0, 0}, EV_ABS, ABS_X, 42},
        {{0, 0}, EV_ABS, ABS_Y, 21},
        {{0, 0}, EV_ABS, ABS_PRESSURE, 56},
        {{0, 0}, EV_ABS, ABS_TOOL_WIDTH, 204},
    };

    memset(&private, 0, sizeof(private));

    info.private = &private;
    info.fd = fd_read;

    private.proto_data = EventProtoDataAlloc();

    /* just the syn event */
    reset_data(&hw, &comm, &private);
    write(fd_write, &syn, sizeof(syn));
    EventReadHwState(&info, &comm, hw);
    assert(hw->numFingers == 0);

    /* one finger */
    reset_data(&hw, &comm, &private);
    write_event(fd_write, &ev[0], 1);
    EventReadHwState(&info, &comm, hw);
    assert(hw->numFingers == 1);

    /* two fingers */
    reset_data(&hw, &comm, &private);
    write_event(fd_write, &ev[1], 1);
    EventReadHwState(&info, &comm, hw);
    assert(hw->numFingers == 2);

    /* three fingers */
    reset_data(&hw, &comm, &private);
    write_event(fd_write, &ev[2], 1);
    EventReadHwState(&info, &comm, hw);
    assert(hw->numFingers == 3);

    /* x/y data */
    reset_data(&hw, &comm, &private);
    write_event(fd_write, &ev[3], 2);
    EventReadHwState(&info, &comm, hw);
    assert(hw->x == ev[3].value);
    assert(hw->y == ev[4].value);

    /* pressure */
    reset_data(&hw, &comm, &private);
    write_event(fd_write, &ev[5], 1);
    EventReadHwState(&info, &comm, hw);
    assert(hw->z == ev[5].value);

    /* finger width */
    reset_data(&hw, &comm, &private);
    write_event(fd_write, &ev[6], 1);
    EventReadHwState(&info, &comm, hw);
    assert(hw->fingerWidth == ev[6].value);

    /* the various buttons */
    test_buttons(fd_write, &info, &comm);

    free(private.proto_data);
    SynapticsHwStateFree(&hw);
    SynapticsHwStateFree(&comm.hwState);
}

static Bool
compare_hw_state(const struct SynapticsHwState *a,
                 const struct SynapticsHwState *b)
{
#define COMPARE(x) \
        if (a->x != b->x) return a->x - b->x

    COMPARE(millis);
    COMPARE(x);
    COMPARE(y);
    COMPARE(z);
    COMPARE(numFingers);
    COMPARE(fingerWidth);
    COMPARE(left);
    COMPARE(right);
    COMPARE(up);
    COMPARE(down);
    if (memcmp(a->multi, b->multi, sizeof(a->multi)))
        return memcmp(a->multi, b->multi, sizeof(a->multi));
    COMPARE(middle);

#undef COMPARE

    return 0;
}

/**
 * Make sure that axes/keys unknown to the driver don't change the hardware
 * state.
 */
static void
test_ignore_hw_state(void)
{
    int i;
    InputInfoRec info = { 0 };
    SynapticsPrivate private;
    struct SynapticsHwState *hw = NULL;
    struct SynapticsHwState *hw_zero = NULL;
    struct CommData comm = { 0 };

    int known_abs[] = {
        ABS_X,
        ABS_Y,
        ABS_PRESSURE,
        ABS_TOOL_WIDTH,
    };

    int known_keys[] = {
        BTN_LEFT,
        BTN_RIGHT,
        BTN_MIDDLE,
        BTN_FORWARD,
        BTN_BACK,
        BTN_0,
        BTN_1,
        BTN_2,
        BTN_3,
        BTN_4,
        BTN_5,
        BTN_6,
        BTN_7,
        BTN_TOOL_FINGER,
        BTN_TOOL_DOUBLETAP,
        BTN_TOOL_TRIPLETAP,
        BTN_TOUCH
    };

    struct input_event ev = { {0, 0}, 0, 0, 1 };

    memset(&private, 0, sizeof(private));
    info.private = &private;
    info.fd = fd_read;

    private.proto_data = EventProtoDataAlloc();

    reset_data(&hw_zero, &comm, &private);

#define _assert_no_change(_type, _code) \
        reset_data(&hw, &comm, &private);               \
        ev.type = _type;                                \
        ev.code = _code;                                \
        ev.value = 1;                                   \
        write_event(fd_write, &ev, 1);                  \
        EventReadHwState(&info, &comm, hw);            \
        assert(compare_hw_state(hw, hw_zero) == 0);

    for (i = ABS_X; i < ABS_MAX; i++) {
        int j, skip = 0;

        for (j = 0; j < ArrayLength(known_abs); j++) {
            if (i == known_abs[j]) {
                skip = 1;
                break;
            }
        }

        if (skip)
            continue;

        _assert_no_change(EV_ABS, i);
    }

    for (i = KEY_RESERVED; i < KEY_MAX; i++) {
        int j, skip = 0;

        for (j = 0; j < ArrayLength(known_keys); j++) {
            if (i == known_keys[j]) {
                skip = 1;
                break;
            }
        }

        if (skip)
            continue;

        _assert_no_change(EV_KEY, i);
    }

    free(private.proto_data);
    SynapticsHwStateFree(&hw);
    SynapticsHwStateFree(&hw_zero);
    SynapticsHwStateFree(&comm.hwState);
}

int
main(int argc, char **argv)
{
    create_pipe_fd();

    test_read_hw_state();
    test_ignore_hw_state();
    return 0;
}