#include <iostream>
#include <map>
#include <optional>

#include "aisa/aisa.h"
#include "git-tag.h"

int main(int argc, const char *argv[])
{
    std::cout << "Version " << GIT_TAG << "\n";

    aisa::Step step;
    const_cast<std::optional<std::pair<aisa::regnum_t, aisa::regval_t>> &>(step.predicate) = std::optional(std::make_pair(123, 456));
    const_cast<std::vector<aisa::regnum_t> &>(step.source_regs).emplace_back(12);
    const_cast<std::vector<aisa::regnum_t> &>(step.source_regs).emplace_back(34);
    const_cast<std::vector<aisa::regnum_t> &>(step.source_regs).emplace_back(56);

    struct State : public aisa::EvalState<State> {
        std::map<aisa::regnum_t, aisa::regval_t> regs;

        std::optional<aisa::regval_t> load_reg(aisa::regnum_t rn)
        {
            std::cout << "state.load_reg(" << rn << ") = ";
            if (auto x = regs.find(rn); x != regs.end()) {
                std::cout << x->second << "\n";
                return x->second;
            }
            std::cout << "(not available)\n";
            return {};
        }
    } state;

    auto t = state.async_load_reg(999);
    t();
    t();
    t();
    std::cout << "set regs[999] = 54321\n"; state.regs[999] = 54321;
    std::optional<aisa::regval_t> result;
    while (!result.has_value())
        result = t();
    std::cout << "result = " << *result << "\n";

    std::cout << "\n\n\n";

    auto w = step.evaluate(state);
    w();
    w();
    w();
    std::cout << "set predicate (valid)\n"; state.regs[step.predicate->first] = step.predicate->second;
    w();
    w();
    w();
    std::cout << "set regs (all)\n";
    for (int i = 10; i < 100; ++i)
        state.regs[i] = 1000 + i;
    for (bool done = false; !done; done = w())
        ;
    std::cout << "huzzah!\n";

    return 0;
}