#include <span>
#include <algorithm>
#include <ranges>
#include <string>
#include <string_view>
#include <utility>
#include <vector>

#include "fmt/std.h"

#include "aoc/types.hpp"
#include "aoc/utils.hpp"

using namespace std::string_view_literals;
using namespace aoc::types;

// starts at 50
[[maybe_unused]]constexpr auto raw_str = R"(
3-5
10-14
16-20
12-18

1
5
8
11
17
32
)";

static auto entry([[maybe_unused]]std::span<char const*> const& args) -> void {
    // std::string str{raw_str};
    auto str = aoc::read_text("./input.txt").value_or("");
    str = aoc::trim(str);

    fmt::print("INPUT\n");
    fmt::print("⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼\n");
    fmt::print("{}\n", str);
    fmt::print("{}\n", std::string(80, '-'));

    auto id_spec = str | std::views::split("\r\n\r\n"sv) | std::views::transform([](auto const& str) {
        return aoc::trim({std::begin(str), std::end(str)});
    }) | std::ranges::to<std::vector>();

    if (id_spec.size() < 2) throw std::runtime_error("ID specification is not valid");

    auto id_range = id_spec[0] | std::views::split("\n"sv) | std::views::transform([](auto const& str) {
        return std::ranges::fold_left(str | std::views::split("-"sv), std::vector<f64>{}, [](auto a, auto const& v) {
                a.push_back(std::stod(std::string({std::begin(v), std::end(v)})));
                return a;
            });
    }) | std::ranges::to<std::vector>();

    auto ids = id_spec[1] | std::views::split("\n"sv) | std::views::transform([](auto const& str) {
        return std::stod(std::string{std::begin(str), std::end(str)});
    }) | std::ranges::to<std::vector>();

    f64 sum = 0;

    for (usize i = 0; i < ids.size(); ++i) {
        auto const id = ids[i];
        bool is_valid = false;
        for (usize j = 0; j < id_range.size(); ++j) {
            auto const a = id_range[j][0];
            auto const b = id_range[j][1];

            if (id >= a && id <= b) {
                is_valid = true;
                break;
            }
        }

        fmt::print("id: {} is {}\n", id, is_valid ? "valid" : "not valid");

        if (is_valid) ++sum;
    }

    fmt::print("res: {}\n", sum);
}

auto main([[maybe_unused]]int argc, [[maybe_unused]]char const* argv[]) -> int {
    try {
        entry({argv, std::next(argv, argc)});
    } catch (std::exception const& e) {
        fmt::print(stderr, "{}\n", e.what());
        return 1;
    }
    return 0;
}