# Copyright 2026 Paul Griffioen
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import petri_net;

include net_behavior;

# ------------------------------------------------------------------------------
# Simple net
#
# A test net with three places and three transitions:
#                    
#                    ____
#       +---------->/ p1 \----------+
#       |           \____/          |
#       |                           |
#       |        +---------+        |
#       |        |   t0    |        |
#       |        +---------+        |
#       |             |             v
#   +--------+       _v__       +--------+ 
#   |   t1   |<---->/ p0 \<---->|   t2   |
#   +--------+      \____/      +--------+ 
#       ^                          |   |
#       |            ____          |   |
#       +-----------/ p2 \<--------+---+
#                   \____/
#
#
# - Initially only t0 is enabled
# - If p0 contains no tokens then t1 and t2 cannot run
# - If p0 contains one token then t1 and t2 cannot run in parallel
# - If p0 contains n tokens then t1 and t2 can run in parallel. The sum of
#   their frequencies is bounded by n.
#
# ------------------------------------------------------------------------------

defunit token "tkn";

defindex Place = {p0, p1, p2};

defindex Transition = {t0, t1, t2};

defmatrix pre :: token * Place! per Transition! = {
    p0, t1 -> 1,
    p2, t1 -> 1,
    p0, t2 -> 1,
    p1, t2 -> 1
};

defmatrix post :: token * Place! per Transition! = {
    p0, t0 -> 1,
    p0, t1 -> 1,
    p1, t1 -> 1,
    p0, t2 -> 1,
    p2, t2 -> 2
};

defmatrix initial_state :: token * Place! = {
  p1 -> 1,
  p2 -> 1
};

declare test_net ::
    PetriNet(token, Place!, Transition!);

define test_net =
    make_petri_net(pre, post, initial_state);

# ------------------------------------------------------------------------------
# A test run
# ------------------------------------------------------------------------------

define my_trace = parallel_trace([
    [tuple(Transition@t0, 2)],
    [tuple(Transition@t1, 1), tuple(Transition@t2, 1)],
    [tuple(Transition@t1, 2)]
]);

print_summary(run_petri_net_trace_verbose(test_net, my_trace));