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use Taurus::Seconds;
use Taurus::Timestamp;

use CSV::Parser;
use Terminal::UI 'ui';
use Terminal::ANSI::OO 't';

# If no arguments are passed then run USAGE & exit.
proto MAIN(|) is export {unless so @*ARGS {put $*USAGE; exit}; {*}}

#| parses Call Logs
multi sub MAIN (
    Str $log where *.IO.f, #= input log file to parse
    UInt :$digits = 10, #= number of significant digits
) is export {
    my @logs;
    my Str %contacts{Str};

    my Instant $timed = now;
    my Promise $initial = start {
        my $p = CSV::Parser.new();
        # 0: Name, 1: Phone number, 2: Call Type,
        # 3: Timestamp, 4: Duration, 5: Sim used.

        # Turn the Hash to an Array.
        @logs = @($log.IO.lines.skip.hyper.map({$p.parse($_)})>>.{0..4}
                  # Discard invalid phone numbers.
                  .grep(*.[1].chars >= $digits));

        for @logs {
            # Discard non-significant digits from phone numbers.
            .[1] .= substr(*-10);

            # Removing leading/trailing whitespaces from names.
            .[0] .= trim;

            # Build contact list.
            %contacts{.[1]} = .[0] if .[0].chars > 0;

            # Store Duration in seconds.
            .[4] = (.[4].split(":")[0] * 60) + .[4].split(":")[1];

            # Store DateTime.
            .[3] = timestamp-to-date .[3];
        }
    };

    ui.setup: :2panes;
    my $p0 = ui.panes[0];
    my $p1 = ui.panes[1];

    until $initial.status {
        $p0.splash: "Parsing logs" ~ (".  ", ".. ", "...")[$++ % 3];
        sleep 1;
    }
    $p0.splash: "Parsed {@logs.elems} entries in {now - $timed}s.";
    $p0.select-last;
    ui.get-key;
    $p0.clear;

    $p0.put: t.bold ~ t.bg-cyan ~ t.black ~ t.underline ~ "Taurus v" ~ $?DISTRIBUTION.meta<version>;
    $p0.put: "";

    $p0.put: "- Show Records", :meta(:all);
    $p0.put: "";
    $p0.put: "Yearly Records";
    $p0.put: "  - $_ Records", :meta(:year($_)) for @logs.map(*.[3].year).unique;
    $p0.put: "";
    # First list Contacts, then sorted phone numbers.
    for @logs.race.map(*.[1]).unique.sort({%contacts{$_} // "Z", $_}) {
        $p0.put: "- " ~ $_ ~ "  {%contacts{$_} // ''}", :meta(:number($_));
    }

    $p1.clear;
    $p0.select-first;
    $p0.select(2);
    $p0.on: select => -> :%meta {
        my Int $fmt = 16;
        if %meta.keys.elems > 0 {
            ui.focus(:pane(1));
            $p1.clear;
        }

        print-basic-stats($p1, @logs) with %meta<all>;

        with %meta<year> -> $year {
            print-yearly-record($p1, @logs, $year);
        }

        with %meta<number> -> $num {
            $p1.put: "Name:   " ~ $_ with %contacts{$num};
            $p1.put: "Number: " ~ $num;
            $p1.put: "";
            print-basic-stats($p1, @logs.grep(*.[1] eqv $num));

            for @logs.map(*.[3].year).unique -> $year {
                print-yearly-record($p1, @logs, $year);
            }
        }
        $p1.select-first;
    }

    ui.interact;
    ui.shutdown;
}

sub print-yearly-record($p1, @logs, $year) {
    constant $fmt = 16;
    my Str @month-name = <Month January February March April May June
                         July August September October November December>;
    $p1.put: "";
    $p1.put: "Year: " ~ $year;
    with @logs.grep(*.[3].year eqv $year).cache {
        for .map(*.[3].month).unique.sort -> $month {
            $p1.put: "  %-*s %s".sprintf($fmt, @month-name[$month] ~ ":",
                                         seconds-to-str(.grep(*.[3].month eqv $month).map(*.[4]).sum));
        }
    }
}

sub print-basic-stats($p1, @logs) {
    constant $fmt = 16;
    with @logs {
        my $outgoing = .grep(*.[2] eqv "Outgoing Call").map(*.[4]).sum;
        my $incoming = .grep(*.[2] eqv "Incoming Call").map(*.[4]).sum;

        $p1.put: "%-*s %s".sprintf($fmt, "Outgoing:", seconds-to-str($outgoing));
        $p1.put: "%-*s %s".sprintf($fmt, "Incoming:", seconds-to-str($incoming));
        $p1.put: "%-*s %s".sprintf($fmt, "Total:", seconds-to-str($outgoing + $incoming));
        $p1.put: "";

        $p1.put: "%-*s %d".sprintf($fmt, "You Rejected:",
                                   .grep({$_.[2] eqv "Rejected Call" and $_.[4] == 0}).elems);
        $p1.put: "%-*s %d".sprintf($fmt, "Missed Calls:",
                                   .grep(*.[2] eqv "Missed Call").elems);
        $p1.put: "%-*s %d".sprintf($fmt, "Missed (they):", # Covers Not in network, Rejected.
                                   .grep({$_.[2] eqv "Outgoing Call" and $_.[4] == 0}).elems);
    }
}

multi sub MAIN(
    Bool :$version #= print version
) is export { put "Taurus v" ~ $?DISTRIBUTION.meta<version>; }