const std = @import("std");
const RngGen = std.rand.DefaultPrng;

// Generate words, by using sonorance - pass in the low/mid/high sonorance, and
// form the string like so:
// ~LMH~M~L
// Where ~ specifies the next char is optional.

pub fn randomIndex(rnd: std.rand.Random, arr: [][]const u8) usize {
    const index = @mod(rnd.int(usize), arr.*.len);
    return index;
}

pub fn main() !void {
    var rnd = RngGen.init(0);
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    const allocator = gpa.allocator();
    // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)

    // Generate words with sonorance rules taken into account
    const low_sonor = [_][]const u8{ "s", "z", "f", "v", "sh", "zh", "kh", "gh" };
    const mid_sonor = [_][]const u8{ "t", "d", "p", "b", "qu", "k", "g" };
    const high_sonor = [_][]const u8{ "a", "e", "i", "o", "u", "y" };
    const structure: []const u8 = "~LMH~M~L";
    var output = std.ArrayList(u8).init(allocator);
    // defer output.deinit();

    var optional = false;
    for (structure) |char| {
        if (char == '~') {
            optional = true;
            continue;
        }

        var skip = rnd.random().boolean();
        if (optional and skip) {
            optional = false;
            continue;
        }

        switch (char) {
            'L' => {
                output.append(low_sonor[randomIndex(rnd.random(), &low_sonor)]);
            },
            'M' => {
                output.append(mid_sonor[randomIndex(rnd.random(), &mid_sonor)]);
            },
            'H' => {
                output.append(high_sonor[randomIndex(rnd.random(), &high_sonor)]);
            },

            else => {
                std.debug.print("Invalid char {s}", .{char});
            },
        }
    }

    std.debug.print("Result: {}", .{output});
}