/* Copyright 2021 Simon Arlott
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "gtest/gtest.h"

#include "debounce_test_common.h"

TEST_F(DebounceTest, OneKeyShort1) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {5, {}, {}},
        /* 0ms delay (fast scan rate) */
        {5, {{0, 1, UP}}, {{0, 1, UP}}},

        {10, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyShort2) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {5, {}, {}},
        /* 1ms delay */
        {6, {{0, 1, UP}}, {{0, 1, UP}}},

        {11, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyShort3) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {5, {}, {}},
        /* 2ms delay */
        {7, {{0, 1, UP}}, {{0, 1, UP}}},

        {12, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyTooQuick1) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        /* Release key exactly on the debounce time */
        {5, {{0, 1, UP}}, {{0, 1, UP}}},
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyTooQuick2) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {5, {}, {}},
        {6, {{0, 1, UP}}, {{0, 1, UP}}},

        /* Press key exactly on the debounce time */
        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyBouncing1) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {1, {{0, 1, UP}}, {{0, 1, UP}}},
        {2, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {3, {{0, 1, UP}}, {{0, 1, UP}}},
        {4, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {5, {{0, 1, UP}}, {{0, 1, UP}}},
        {6, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {11, {{0, 1, UP}}, {{0, 1, UP}}}, /* 5ms after DOWN at time 7 */
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyBouncing2) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {5, {}, {}},
        {6, {{0, 1, UP}}, {{0, 1, UP}}},
        {7, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {8, {{0, 1, UP}}, {{0, 1, UP}}},
        {9, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {10, {{0, 1, UP}}, {{0, 1, UP}}},
        {15, {}, {}}, /* 5ms after UP at time 10 */
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyLong) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {5, {}, {}},

        {25, {{0, 1, UP}}, {{0, 1, UP}}},

        {30, {}, {}},

        {50, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {55, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, TwoKeysShort) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {1, {{0, 2, DOWN}}, {{0, 2, DOWN}}},

        {6, {}, {}},

        {7, {{0, 1, UP}}, {{0, 1, UP}}},
        {8, {{0, 2, UP}}, {{0, 2, UP}}},

        {13, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, TwoKeysSimultaneous1) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}, {0, 2, DOWN}}, {{0, 1, DOWN}, {0, 2, DOWN}}},

        {5, {}, {}},
        {6, {{0, 1, UP}, {0, 2, UP}}, {{0, 1, UP}, {0, 2, UP}}},

        {11, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, TwoKeysSimultaneous2) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
        {1, {{0, 2, DOWN}}, {{0, 2, DOWN}}},

        {5, {}, {}},
        {6, {}, {}},
        {7, {{0, 1, UP}}, {{0, 1, UP}}},
        {8, {{0, 2, UP}}, {{0, 2, UP}}},

        {13, {}, {}},
    });
    runEvents();
}

TEST_F(DebounceTest, OneKeyDelayedScan1) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        /* Processing is very late */
        {300, {}, {}},
        /* Immediately release key */
        {300, {{0, 1, UP}}, {{0, 1, UP}}},

        {305, {}, {}},
    });
    time_jumps_ = true;
    runEvents();
}

TEST_F(DebounceTest, OneKeyDelayedScan2) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        /* Processing is very late */
        {300, {}, {}},
        /* Release key after 1ms */
        {301, {{0, 1, UP}}, {{0, 1, UP}}},

        {306, {}, {}},
    });
    time_jumps_ = true;
    runEvents();
}

TEST_F(DebounceTest, OneKeyDelayedScan3) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        /* Release key before debounce expires */
        {300, {{0, 1, UP}}, {{0, 1, UP}}},
    });
    time_jumps_ = true;
    runEvents();
}

TEST_F(DebounceTest, OneKeyDelayedScan4) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        /* Processing is a bit late */
        {50, {}, {}},
        /* Release key after 1ms */
        {51, {{0, 1, UP}}, {{0, 1, UP}}},

        {56, {}, {}},
    });
    time_jumps_ = true;
    runEvents();
}

TEST_F(DebounceTest, AsyncTickOneKeyShort1) {
    addEvents({
        /* Time, Inputs, Outputs */
        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},

        {5, {}, {}},
        /* 0ms delay (fast scan rate) */
        {5, {{0, 1, UP}}, {{0, 1, UP}}},

        {10, {}, {}},
    });
    /*
     * Debounce implementations should never read the timer more than once per invocation
     */
    async_time_jumps_ = DEBOUNCE;
    runEvents();
}
