/**
 * @file test_pwm.c
 * @brief Hardware tests for PWM
 */

#include "unity.h"
#include "kernel.h"
#include "pwm_driver.h"
#include "board.h"

/* Setup */
void setUp(void) {
    kernel_init();
    board_init();
}

/* Teardown */
void tearDown(void) {
    kernel_stop();
}

/* ============================================================================
 * Test Cases
 * ============================================================================ */

/**
 * @brief Test PWM initialization
 */
void test_pwm_init(void) {
    PwmConfig_t config = {
        .frequency_hz = 1000,
        .alignment = PWM_ALIGNMENT_EDGE,
        .period_ticks = 1000,
        .prescaler = 100,
        .channel_count = 1,
        .channels = {
            {.channel = 0, .duty_cycle = 0}
        },
        .enable_fault_protection = false,
        .fault_action = PWM_FAULT_DISABLE
    };

    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_init(0, &config));
}

/**
 * @brief Test PWM duty cycle
 */
void test_pwm_duty_cycle(void) {
    /* Set 50% duty cycle */
    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_set_duty_cycle(0, 0, 5000));
    TEST_ASSERT_EQUAL(5000, pwm_get_duty_cycle(0, 0));

    /* Set 0% duty cycle */
    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_set_duty_cycle(0, 0, 0));
    TEST_ASSERT_EQUAL(0, pwm_get_duty_cycle(0, 0));

    /* Set 100% duty cycle */
    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_set_duty_cycle(0, 0, 10000));
    TEST_ASSERT_EQUAL(10000, pwm_get_duty_cycle(0, 0));
}

/**
 * @brief Test PWM frequency
 */
void test_pwm_frequency(void) {
    /* Set frequency */
    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_set_frequency(0, 2000));
    TEST_ASSERT_EQUAL(2000, pwm_get_frequency(0));
}

/**
 * @brief Test PWM start/stop
 */
void test_pwm_start_stop(void) {
    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_start(0));
    TEST_ASSERT_EQUAL(KERNEL_OK, pwm_stop(0));
}

/* ============================================================================
 * Test Runner
 * ============================================================================ */
int main(void) {
    UNITY_BEGIN();

    RUN_TEST(test_pwm_init);
    RUN_TEST(test_pwm_duty_cycle);
    RUN_TEST(test_pwm_frequency);
    RUN_TEST(test_pwm_start_stop);

    return UNITY_END();
}