// -*- mode: C++; c-file-style: "cc-mode" -*-
//*************************************************************************
//
// Copyright 2010-2011 by Wilson Snyder. This program is free software; you can
// redistribute it and/or modify it under the terms of either the GNU
// Lesser General Public License Version 3 or the Perl Artistic License
// Version 2.0.
// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
//
//*************************************************************************

#ifdef IS_VPI

#include "sv_vpi_user.h"

#include <cstdlib>

#else

#include "verilated.h"
#include "verilated_vcd_c.h"
#include "verilated_vpi.h"

#include "Vt_vpi_package.h"
#include "Vt_vpi_package__Dpi.h"
#include "svdpi.h"

#endif

#include <cstdio>
#include <cstring>
#include <iostream>

// These require the above. Comment prevents clang-format moving them
#include "TestSimulator.h"
#include "TestVpi.h"

// __FILE__ is too long
#define FILENM "t_vpi_package.cpp"

#define DEBUG \
    if (0) printf

#define CHECK_RESULT_NZ(got) \
    if (!(got)) { \
        printf("%%Error: %s:%d: GOT = NULL  EXP = !NULL\n", FILENM, __LINE__); \
        return __LINE__; \
    }

#define CHECK_RESULT_Z(got) \
    if (got) { \
        printf("%%Error: %s:%d: GOT = !NULL  EXP = NULL\n", FILENM, __LINE__); \
        return __LINE__; \
    }

#define CHECK_RESULT(got, exp) \
    if ((got) != (exp)) { \
        std::cout << std::dec << "%Error: " << FILENM << ":" << __LINE__ << ": GOT = " << (got) \
                  << "   EXP = " << (exp) << std::endl; \
        return __LINE__; \
    }

#define CHECK_RESULT_CSTR(got, exp) \
    if (std::strcmp((got), (exp))) { \
        printf("%%Error: %s:%d: GOT = '%s'   EXP = '%s'\n", FILENM, __LINE__, \
               (got) ? (got) : "<null>", (exp) ? (exp) : "<null>"); \
        return __LINE__; \
    }

extern "C" {
int count_params(TestVpiHandle& handle, int expectedParams) {
    TestVpiHandle it = vpi_iterate(vpiParameter, handle);
    CHECK_RESULT_NZ(it)

    int params = 0;
    while (true) {
        TestVpiHandle handle = vpi_scan(it);
        if (!handle) break;
        const int vpi_type = vpi_get(vpiType, handle);
        CHECK_RESULT(vpi_type, vpiParameter);
        params++;
    }
    it.freed();
    CHECK_RESULT(params, expectedParams);

    return 0;
}

int check_handle(char* name, vpiHandle scopeHandle) {
    const TestVpiHandle handle = vpi_handle_by_name(name, scopeHandle);
    CHECK_RESULT_NZ(handle)
    return 0;
}

int mon_check() {
#ifdef TEST_VERBOSE
    printf("-mon_check()\n");
#endif

    TestVpiHandle it = vpi_iterate(vpiModule, NULL);
    CHECK_RESULT_NZ(it)

    bool found_t = false;
    while (true) {
        TestVpiHandle handle = vpi_scan(it);
        if (handle == NULL) break;
        CHECK_RESULT_CSTR("t", vpi_get_str(vpiName, handle))
        CHECK_RESULT_Z(found_t)
        found_t = true;
    }
    it.freed();
    CHECK_RESULT_NZ(found_t);

    it = vpi_iterate(vpiInstance, NULL);
    CHECK_RESULT_NZ(it)

    TestVpiHandle pkgHandle = NULL;
    TestVpiHandle tHandle = NULL;
    TestVpiHandle unitHandle = NULL;
    while (true) {
        TestVpiHandle handle = vpi_scan(it);
        if (handle == NULL) break;
        const char* name = vpi_get_str(vpiName, handle);
        const char* fullname = vpi_get_str(vpiFullName, handle);
        if (!strcmp("t", name)) {
            CHECK_RESULT_CSTR("t", fullname)
            CHECK_RESULT_Z(tHandle)
            tHandle = handle;
            handle.freed();
        } else if (!strcmp("somepackage", name)) {
            CHECK_RESULT_CSTR("somepackage::", fullname)
            CHECK_RESULT_Z(pkgHandle)
            pkgHandle = handle;
            handle.freed();
        } else if (!strcmp("$unit", name)) {
            CHECK_RESULT_CSTR("$unit::", fullname)
            CHECK_RESULT_Z(unitHandle)
            unitHandle = handle;
            handle.freed();
        } else {
            CHECK_RESULT_NZ(0)
        }
    }
    it.freed();
    CHECK_RESULT_NZ(pkgHandle)
    CHECK_RESULT_NZ(tHandle)
    CHECK_RESULT_NZ(unitHandle)

    CHECK_RESULT_Z(count_params(unitHandle, 1));
    CHECK_RESULT_Z(count_params(pkgHandle, 2));
    CHECK_RESULT_Z(count_params(tHandle, 3));

    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("someOtherInt"), tHandle))
    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("t.someOtherInt"), NULL))
    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("someInt"), pkgHandle))
    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("somepackage::someInt"), NULL))
    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("dollarUnitInt"), unitHandle))
    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("$unit::dollarUnitInt"), NULL))
    CHECK_RESULT_Z(check_handle(const_cast<PLI_BYTE8*>("somepackage"), NULL))

    return 0;  // Ok
}
}
//======================================================================

#ifdef IS_VPI

static int mon_check_vpi() {
    TestVpiHandle href = vpi_handle(vpiSysTfCall, 0);
    s_vpi_value vpi_value;

    vpi_value.format = vpiIntVal;
    vpi_value.value.integer = mon_check();
    vpi_put_value(href, &vpi_value, NULL, vpiNoDelay);

    return 0;
}

static s_vpi_systf_data vpi_systf_data[] = {{vpiSysFunc, vpiIntFunc, (PLI_BYTE8*)"$mon_check",
                                             (PLI_INT32(*)(PLI_BYTE8*))mon_check_vpi, 0, 0, 0},
                                            0};

// cver entry
void vpi_compat_bootstrap(void) {
    p_vpi_systf_data systf_data_p;
    systf_data_p = &(vpi_systf_data[0]);
    while (systf_data_p->type != 0) vpi_register_systf(systf_data_p++);
}

// icarus entry
void (*vlog_startup_routines[])() = {vpi_compat_bootstrap, 0};

#else

int main(int argc, char** argv) {
    const std::unique_ptr<VerilatedContext> contextp{new VerilatedContext};

    uint64_t sim_time = 1100;
    contextp->debug(0);
    contextp->commandArgs(argc, argv);
    // We're going to be checking for these errors so don't crash out
    contextp->fatalOnVpiError(0);

    {
        // Construct and destroy
        const std::unique_ptr<VM_PREFIX> topp{
            new VM_PREFIX{contextp.get(),
                          // Note null name - we're flattening it out
                          ""}};
    }

    // Test second construction
    const std::unique_ptr<VM_PREFIX> topp{new VM_PREFIX{contextp.get(),
                                                        // Note null name - we're flattening it out
                                                        ""}};

#ifdef VERILATOR
#ifdef TEST_VERBOSE
    contextp->scopesDump();
#endif
#endif

#if VM_TRACE
    contextp->traceEverOn(true);
    VL_PRINTF("Enabling waves...\n");
    VerilatedVcdC* tfp = new VerilatedVcdC;
    topp->trace(tfp, 99);
    tfp->open(STRINGIFY(TEST_OBJ_DIR) "/simx.vcd");
#endif

    topp->eval();
    contextp->timeInc(10);

    while (contextp->time() < sim_time && !contextp->gotFinish()) {
        contextp->timeInc(1);
        topp->eval();
        VerilatedVpi::callValueCbs();
        // mon_do();
#if VM_TRACE
        if (tfp) tfp->dump(contextp->time());
#endif
    }
    if (!contextp->gotFinish()) {
        vl_fatal(FILENM, __LINE__, "main", "%Error: Timeout; never got a $finish");
    }
    topp->final();

#if VM_TRACE
    if (tfp) tfp->close();
#endif

    return 0;
}

#endif