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import deimos.ncurses;
import std.string : toStringz;
import core.stdc.locale;
import std.format;
import std.stdio;
import board;
import spots;
import portals;

void main() {
    setlocale(LC_CTYPE, ""); // ncurses locales are weird

    auto stdscr = initscr();
    scope (exit)
        endwin();
    cbreak(); // disables line buffering for input
    noecho(); // input doesn't display on-screen
    intrflush(stdscr, true);
    keypad(stdscr, true); // allows arrow keys to work
    scrollok(stdscr, true); // allows scrolling in up/down arrows
    nonl(); // "return" goes through input

    auto source = new OverlaySource(new RandomSource());
    auto portals = new Portals(source);
    auto board = new Board(source);
    auto disp = new BoardDisplay(board, stdscr);
    disp.print();
    int rocks = 0;
    disp.status = "Press [space] to pick up and set down rocks";
    refresh();

    import std.bigint : BigInt;

    BigInt[][int] portal;
    int lastPortalId;

    outer: while (true) {
        auto c = getch();
        switch (c) {
        case ',':
        case KEY_UP:
            disp.up();
            break;
        case 'o':
        case KEY_DOWN:
            disp.down();
            break;
        case 'e':
        case KEY_RIGHT:
            disp.right();
            break;
        case 'a':
        case KEY_LEFT:
            disp.left();
            break;
        case KEY_RESIZE:
            disp.getdims();
            break;
        case ' ':
            if (source[disp.y, disp.x].isRock()) {
                source[disp.y, disp.x] = Spot(' ');
                rocks++;
                disp.status = format("%d", rocks);
                disp.print();
            } else if (rocks > 0 && source[disp.y, disp.x].isSpace()) {
                source[disp.y, disp.x] = Spot('*');
                rocks--;
                disp.status = format("%d", rocks);
                disp.print();
            }
            break;
        case 'q':
            break outer;
        case 's':
            auto filename = stdscr.readquery("Save:");
            if (filename) {
                try {
                    auto file = File(filename, "wb");
                    file.writefln!"%s %s"(disp.y, disp.x);
                    file.writefln!"%d"(rocks);
                    source.save(file);
                    portals.save(file);
                } catch (Exception e) {
                }
            }
            break;
        case 'l':
            auto filename = stdscr.readquery("Load:");
            if (filename) {
                try {
                    import std.algorithm.iteration : splitter, map;
                    import std.conv : to;

                    auto file = File(filename);
                    auto coord = file.readln.splitter().map!(to!BigInt);
                    disp.y = coord.front;
                    coord.popFront;
                    disp.x = coord.front;
                    file.readf!"%d\n"(rocks);
                    disp.status = format("%d", rocks);
                    source.load(file);
                    portals.load(file);
                } catch (Exception e) {
                }
            }
            disp.print();
            break;
        case '/':
            auto sp = source[disp.y, disp.x];
            if (sp.isSpace) {
                if (rocks >= 10) {
                    rocks -= 10;
                    portals.add(disp.y, disp.x);
                }
            } else if (sp.isPortal) {
                rocks += 10;
                portals.remove(disp.y, disp.x);
            }
            disp.status = format("%d", rocks);
            disp.print();
            break;
        case 'g':
            auto sp = source[disp.y, disp.x];
            if (sp.isPortal) {
                auto dest = portals.get(sp.id).pair;
                if (dest != null) {
                    disp.y = dest.y;
                    disp.x = dest.x;
                }
            }
            disp.print();
            break;
        default:
            continue;
        }
    }
}

immutable char ESC = 27;

string readquery(WINDOW* stdscr, string query) {
    import std.range : replicate;
    import std.conv : to;
    import std.array : appender;

    int height;
    int width;
    getmaxyx(stdscr, height, width);

    mvprintw(height, 0, toStringz(query ~ " ".replicate(width - query.length)));
    move(height, cast(int) query.length + 1);

    scrollok(stdscr, false);
    scope (success)
        scrollok(stdscr, true);
    auto build = appender!(char[]);

    int p = cast(int) query.length + 1;
    while (auto ch = getch()) {
        if (ch == '\r' || ch == EOF)
            break;
        if (ch == '\b' || ch == KEY_BACKSPACE || ch == 127) {
            if (build[].length > 0) {
                p--;
                mvaddch(height, p, ' ');
                build.shrinkTo(build[].length - 1);
                move(height, p);
            }
        } else if (ch == ESC) {
            return null;
        } else {
            build ~= cast(char) ch;
            addch(ch);
            p++;
        }
    }

    return cast(string) build[];
}