#define DJSTD_BASIC_ENTRY
#include "./djstdlib/core.c"

int djstd_entry(Arena *arena, StringList args) {
    string input = os_readEntireFile(arena, s("./day1-input"));

    int64 dial = 50;
    int64 lineNo = 0;
    StringList split = strSplit(arena, s("\n"), input);

    int32 password = 0;

    for (EachEl(split, string, line)) {
        if (!strEql(*line, s(""))) {
            bool lineValid = false;
            if (line->length > 1) {
                char dir = line->str[0];
                Int32Result numStrParsed = parsePositiveInt32(strChopStart(*line, 1));
                if (numStrParsed.valid) {
                    lineValid = true;

                    int32 dialPrev = dial;
                    int32 pwPrev = password;

                    int32 turns = (+numStrParsed.result)/100;
                    password += turns;

                    int32 remainder = numStrParsed.result - (numStrParsed.result/100)*100;

                    if (dir == 'L') {
                        dial -= remainder;
                    } else if (dir == 'R') {
                        dial += remainder;
                    }

                    if (dialPrev != 0 && (dial >= 100 || dial <= 0)) {
                        password += 1;
                    }

                    println("turn: %S, %d => %d, %d", *line, dialPrev, dial, password - pwPrev);

                    dial %= 100;
                    if (dial < 0) {
                        dial += 100;
                    }
                }
            }
            if (!lineValid) {
                println("Input corrupted at line %d", lineNo);
                return 1;
            }
        }
        lineNo++;
    }

    println("%d", password);

    return 0;
}