use std;

import task;
import task::task;
import comm;
import comm::chan;
import comm::port;
import comm::send;
import comm::recv;

fn main() {
    test00();
    // test01();
    test02();
    test04();
    test05();
    test06();
}

fn test00_start(ch: chan<int>, message: int, count: int) {
    #debug("Starting test00_start");
    let i: int = 0;
    while i < count {
        #debug("Sending Message");
        send(ch, message + 0);
        i = i + 1;
    }
    #debug("Ending test00_start");
}

fn test00() {
    let number_of_tasks: int = 1;
    let number_of_messages: int = 4;
    #debug("Creating tasks");

    let po = port();
    let ch = chan(po);

    let i: int = 0;

    let tasks = [];
    while i < number_of_tasks {
        i = i + 1;
        tasks += [
            task::spawn_joinable {|| test00_start(ch, i, number_of_messages);}
        ];
    }
    let sum: int = 0;
    for t in tasks {
        i = 0;
        while i < number_of_messages { sum += recv(po); i = i + 1; }
    }

    for t in tasks { task::join(t); }

    #debug("Completed: Final number is: ");
    assert (sum ==
                number_of_messages *
                    (number_of_tasks * number_of_tasks + number_of_tasks) /
                    2);
}

fn test01() {
    let p = port();
    #debug("Reading from a port that is never written to.");
    let value: int = recv(p);
    log(debug, value);
}

fn test02() {
    let p = port();
    let c = chan(p);
    #debug("Writing to a local task channel.");
    send(c, 42);
    #debug("Reading from a local task port.");
    let value: int = recv(p);
    log(debug, value);
}

fn test04_start() {
    #debug("Started task");
    let i: int = 1024 * 1024;
    while i > 0 { i = i - 1; }
    #debug("Finished task");
}

fn test04() {
    #debug("Spawning lots of tasks.");
    let i: int = 4;
    while i > 0 { i = i - 1; task::spawn {|| test04_start(); }; }
    #debug("Finishing up.");
}

fn test05_start(ch: chan<int>) {
    send(ch, 10);
    send(ch, 20);
    send(ch, 30);
    send(ch, 30);
    send(ch, 30);
}

fn test05() {
    let po = comm::port();
    let ch = chan(po);
    task::spawn {|| test05_start(ch); };
    let value: int;
    value = recv(po);
    value = recv(po);
    value = recv(po);
    log(debug, value);
}

fn test06_start(&&task_number: int) {
    #debug("Started task.");
    let i: int = 0;
    while i < 1000000 { i = i + 1; }
    #debug("Finished task.");
}

fn test06() {
    let number_of_tasks: int = 4;
    #debug("Creating tasks");

    let i: int = 0;

    let tasks = [];
    while i < number_of_tasks {
        i = i + 1;
        tasks += [task::spawn_joinable {|| test06_start(i);}];
    }


    for t in tasks { task::join(t); }
}