package Hydra::Event::BuildFinished;
use strict;
use warnings;
sub parse :prototype(@) {
    if (@_ == 0) {
        die "build_finished: payload takes at least one argument, but ", scalar(@_), " were given";
    }
    my @failures = grep(!/^\d+$/, @_);
    if (@failures > 0) {
        die "build_finished: payload arguments should be integers, but we received the following non-integers:", @failures;
    }
    my ($build_id, @dependents) = map int, @_;
    return Hydra::Event::BuildFinished->new($build_id, \@dependents);
}
sub new {
    my ($self, $build_id, $dependencies) = @_;
    return bless { "build_id" => $build_id, "dependencies" => $dependencies }, $self;
}
1;

package Hydra::Event::BuildStarted;
use strict;
use warnings;
sub parse :prototype(@) {
    unless (@_ == 1) {
        die "build_started: payload takes only one argument, but ", scalar(@_), " were given";
    }
    my ($build_id) = @_;
    unless ($build_id =~ /^\d+$/) {
        die "build_started: payload argument should be an integer, but '", $build_id, "' was given"
    }
    return Hydra::Event::BuildStarted->new(int($build_id));
}
sub new {
    my ($self, $id) = @_;
    return bless { "build_id" => $id }, $self;
}
1;

package Hydra::Event::StepFinished;
use strict;
use warnings;
sub parse :prototype(@) {
    unless (@_ == 3) {
        die "step_finished: payload takes exactly three arguments, but ", scalar(@_), " were given";
    }
    my ($build_id, $step_number, $log_path) = @_;
    unless ($build_id =~ /^\d+$/) {
        die "step_finished: payload argument build_id should be an integer, but '", $build_id, "' was given"
    }
    unless ($step_number =~ /^\d+$/) {
        die "step_finished: payload argument step_number should be an integer, but '", $step_number, "' was given"
    }
    return Hydra::Event::StepFinished->new(int($build_id), int($step_number), $log_path);
}
sub new :prototype($$$) {
    my ($self, $build_id, $step_number, $log_path) = @_;
    return bless { "build_id" => $build_id, "step_number" => $step_number, "log_path" => $log_path }, $self;
}
1;

package Hydra::Event;
use strict;
use Hydra::Event::BuildFinished;
use Hydra::Event::BuildStarted;
use Hydra::Event::StepFinished;
our @ISA = qw(Exporter);
our @EXPORT = qw(
    parse_payload
);
my %channels_to_events = (
  build_started => \&Hydra::Event::BuildStarted::parse,
  step_finished => \&Hydra::Event::StepFinished::parse,
  build_finished => \&Hydra::Event::BuildFinished::parse,
);
sub parse_payload :prototype($$) {
    my ($channel_name, $payload) = @_;
    my @payload = split /\t/, $payload;
    my $parser = %channels_to_events{$channel_name};
    unless (defined $parser) {
      die "Invalid channel name: '$channel_name'";
    }
    return $parser->(@payload);
}

use strict;
use Hydra::Event;
use Hydra::Event::BuildFinished;
use Hydra::Event::BuildStarted;
use Hydra::Event::StepFinished;
use Test2::V0;
use Test2::Tools::Exception;
subtest "Payload type: build_started" => sub {
    like(
        dies { Hydra::Event::parse_payload("build_started", "") },
        qr/one argument/,
        "empty payload"
    );
    like(
        dies { Hydra::Event::parse_payload("build_started", "abc123\tabc123") },
        qr/only one argument/,
        "two arguments"
    );
    like(
        dies { Hydra::Event::parse_payload("build_started", "abc123") },
        qr/should be an integer/,
        "not an integer"
    );
    is(
        Hydra::Event::parse_payload("build_started", "19"),
        Hydra::Event::BuildStarted->new(19),
        "Valid parse"
    );
};
subtest "Payload type: step_finished" => sub {
    like(
        dies { Hydra::Event::parse_payload("step_finished", "") },
        qr/three arguments/,
        "empty payload"
    );
    like(
        dies { Hydra::Event::parse_payload("step_finished", "abc123") },
        qr/three arguments/,
        "one argument"
    );
    like(
        dies { Hydra::Event::parse_payload("step_finished", "abc123\tabc123") },
        qr/three arguments/,
        "two arguments"
    );
    like(
        dies { Hydra::Event::parse_payload("step_finished", "abc123\tabc123\tabc123\tabc123") },
        qr/three arguments/,
        "four arguments"
    );
    like(
        dies { Hydra::Event::parse_payload("step_finished", "abc123\t123\t/path/to/log") },
        qr/should be an integer/,
        "not an integer: first position"
    );
    like(
        dies { Hydra::Event::parse_payload("step_finished", "123\tabc123\t/path/to/log") },
        qr/should be an integer/,
        "not an integer: second argument"
    );
    is(
        Hydra::Event::parse_payload("step_finished", "123\t456\t/path/to/logfile"),
        Hydra::Event::StepFinished->new(123, 456, "/path/to/logfile")
    );
};
subtest "Payload type: build_finished" => sub {
    like(
        dies { Hydra::Event::parse_payload("build_finished", "") },
        qr/at least one argument/,
        "empty payload"
    );
    like(
        dies { Hydra::Event::parse_payload("build_finished", "abc123") },
        qr/should be integers/,
        "build ID should be an integer"
    );
    like(
        dies { Hydra::Event::parse_payload("build_finished", "123\tabc123") },
        qr/should be integers/,
        "dependent ID should be an integer"
    );
    is(
        Hydra::Event::parse_payload("build_finished", "123"),
        Hydra::Event::BuildFinished->new(123, []),
        "no dependent builds"
    );
    is(
        Hydra::Event::parse_payload("build_finished", "123\t456"),
        Hydra::Event::BuildFinished->new(123, [456]),
        "one dependent build"
    );
    is(
        Hydra::Event::parse_payload("build_finished", "123\t456\t789\t012\t345"),
        Hydra::Event::BuildFinished->new(123, [456, 789, 12, 345]),
        "four dependent builds"
    );
};
subtest "Payload type: bogus" => sub {
    like(
        dies { Hydra::Event::parse_payload("bogus", "") },
        qr/Invalid channel name/,
        "bogus channel"
    );
};
done_testing;