# Copyright (C) 2023 Luigi Pertoldi <gipert@pm.me>
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import os
from datetime import datetime
from pathlib import Path
import time

from snakemake.logging import logger
from dbetto import AttrsDict

from legendsimflow import aggregate, nersc, patterns, utils
from legendsimflow.aggregate import gen_list_of_all_hpges_valid_for_modeling


logger.info("Initializing workflow context")

SIMFLOW_CONTEXT = utils.init_simflow_context(config, workflow)
config = SIMFLOW_CONTEXT.config

# it takes a while to generate the list of good HPGes of all channels, let's do
# it at the start and cache it for later
SIMFLOW_CONTEXT |= {
    "modelable_hpges": gen_list_of_all_hpges_valid_for_modeling(
        config, write_to_file=config.paths.pars / "modelable_hpge_detectors.yaml"
    ),
}

# sanitize the make_steps field
make_steps = config.get("make_steps", aggregate.STEPS_ORDERED)
make_steps = utils.sorted_by(make_steps, aggregate.STEPS_ORDERED)
config["make_steps"] = make_steps

logger.info("Done! Handing it over to Snakemake")


def dvs_ro(x):
    return nersc.dvs_ro(config, x)


wildcard_constraints:
    tier=r"\w+",
    simid=r"[-\w]+",
    jobid=r"\d+",
    runid=r"\w+(?:-\w+){3}",
    hpge_detector=r"[VPBC]\w{6}",
    hpge_voltage=r"\d+",


onstart:
    utils.setup_logdir_link(config)

    # make sure some packages are initialized before we begin to avoid race conditions
    # https://numba.readthedocs.io/en/stable/developer/caching.html#cache-sharing
    if not workflow.touch and "precompile_pkg" in config:
        logger.info(
            f"Pre-compiling Numba cache (NUMBA_CACHE_DIR={os.environ.get('NUMBA_CACHE_DIR')})"
        )
        for module in config.precompile_pkg:
            shell(f"python -c 'from {module} import *'")

    logger.info("Starting workflow")


include: "rules/aux.smk"


for step in make_steps:

    include: f"rules/{step}.smk"


# strategy: select the latest requested tier (in steps_ordered),
# then make the build cumulative by including all tiers up to it.
def gen_target_all():
    if config.get("simlist", "*") not in ("all", "*"):
        result = aggregate.process_simlist(config, make_steps=make_steps)
        result.append(patterns.plots_tarball_filename(config))
        return result

    inputs = []
    for step in make_steps:
        if step == "cvt":
            inputs.extend(rules.gen_all_tier_cvt.input)
        elif step == "evt":
            inputs.extend(rules.gen_all_tier_evt.input)
        elif step == "hit":
            inputs.extend(rules.gen_all_tier_hit.input)
        elif step == "opt":
            inputs.extend(rules.gen_all_tier_opt.input)
        elif step == "stp":
            inputs.extend(rules.gen_all_tier_stp.input)
        elif step in ("vtx", "par"):
            pass

    inputs.append(patterns.plots_tarball_filename(config))
    return inputs


rule all:
    """Default rule.

    Makes all output files of the highest tier specified in the `make_steps`
    configuration variable (holding a list of steps) and all the simids listed
    in the `simlist` configuration variable.
    """
    default_target: True
    input:
        gen_target_all(),
