# Copyright edalize contributors
# Licensed under the 2-Clause BSD License, see LICENSE for details.
# SPDX-License-Identifier: BSD-2-Clause

import os
import logging

from edalize.edatool import Edatool

logger = logging.getLogger(__name__)

MAKEFILE_TEMPLATE = """
all: $(VPI_MODULES) $(TARGET)

$(TARGET):
	iverilog $(TOPLEVEL) -c $(TARGET).scr -o $@ $(IVERILOG_OPTIONS)

run: $(VPI_MODULES) $(TARGET)
	vvp -n -M. -l icarus.log $(patsubst %.vpi,-m%,$(VPI_MODULES)) $(VVP_OPTIONS) $(TARGET) -fst $(EXTRA_OPTIONS)

clean:
	$(RM) $(VPI_MODULES) $(TARGET)
"""

VPI_MAKE_SECTION = """
{name}_LIBS := {libs}
{name}_INCS := {incs}
{name}_SRCS := {srcs}

{name}.vpi: $({name}_SRCS)
	iverilog-vpi --name={name} $({name}_LIBS) $({name}_INCS) $?

clean_{name}:
	$(RM) {name}.vpi
"""


class Icarus(Edatool):

    argtypes = ["plusarg", "vlogdefine", "vlogparam"]

    @classmethod
    def get_doc(cls, api_ver):
        if api_ver == 0:
            return {
                "description": "Icarus Verilog is a Verilog simulation and synthesis tool. It operates as a compiler, compiling source code written in Verilog (IEEE-1364) into some target format",
                "members": [
                    {"name": "timescale", "type": "String", "desc": "Default timescale"}
                ],
                "lists": [
                    {
                        "name": "iverilog_options",
                        "type": "String",
                        "desc": "Additional options for iverilog",
                    },
                    {
                        "name": "vvp_options",
                        "type": "String",
                        "desc": "Additional options for vvp",
                    },
                ],
            }

    def configure_main(self):
        logger.warning(
            "This backend is deprecated and will eventually be removed. Please migrate to the flow API instead.  See https://edalize.readthedocs.io/en/latest/ref/migrations.html#migrating-from-the-tool-api-to-the-flow-api for more details."
        )
        f = open(os.path.join(self.work_root, self.name + ".scr"), "w")

        (src_files, incdirs) = self._get_fileset_files()
        for key, value in self.vlogdefine.items():
            f.write("+define+{}={}\n".format(key, self._param_value_str(value, "")))

        for key, value in self.vlogparam.items():
            for top in self.toplevel.split(" "):
                f.write(
                    "+parameter+{}.{}={}\n".format(
                        top, key, self._param_value_str(value, '"')
                    )
                )
        for id in incdirs:
            f.write("+incdir+" + id + "\n")
        timescale = self.tool_options.get("timescale")
        if timescale:
            with open(os.path.join(self.work_root, "timescale.v"), "w") as tsfile:
                tsfile.write("`timescale {}\n".format(timescale))
            f.write("timescale.v\n")

        supported_file_types = [
            "verilogSource",
            "verilogSource-95",
            "verilogSource-2001",
            "verilogSource-2005",
            "systemVerilogSource",
            "systemVerilogSource-3.0",
            "systemVerilogSource-3.1",
            "systemVerilogSource-3.1a",
        ]
        for src_file in src_files:
            if src_file.file_type in supported_file_types:
                f.write(src_file.name + "\n")
            elif src_file.file_type == "user":
                pass
            else:
                _s = "{} has unknown file type '{}'"
                logger.warning(_s.format(src_file.name, src_file.file_type))

        f.close()

        with open(os.path.join(self.work_root, "Makefile"), "w") as f:

            f.write("TARGET           := {}\n".format(self.name))
            _vpi_modules = " ".join([m["name"] + ".vpi" for m in self.vpi_modules])
            if _vpi_modules:
                f.write("VPI_MODULES      := {}\n".format(_vpi_modules))
            f.write(
                "TOPLEVEL         := {}\n".format(
                    " ".join(["-s" + x for x in self.toplevel.split()])
                )
            )
            f.write(
                "IVERILOG_OPTIONS := {}\n".format(
                    " ".join(self.tool_options.get("iverilog_options", []))
                )
            )
            f.write(
                "VVP_OPTIONS := {}\n".format(
                    " ".join(self.tool_options.get("vvp_options", []))
                )
            )
            if self.plusarg:
                plusargs = []
                for key, value in self.plusarg.items():
                    plusargs += ["+{}={}".format(key, self._param_value_str(value))]
                f.write("EXTRA_OPTIONS    ?= {}\n".format(" ".join(plusargs)))

            f.write(MAKEFILE_TEMPLATE)

            for vpi_module in self.vpi_modules:
                _incs = ["-I" + s for s in vpi_module["include_dirs"]]
                _libs = ["-l" + l for l in vpi_module["libs"]]
                _srcs = vpi_module["src_files"]
                f.write(
                    VPI_MAKE_SECTION.format(
                        name=vpi_module["name"],
                        libs=" ".join(_libs),
                        incs=" ".join(_incs),
                        srcs=" ".join(_srcs),
                    )
                )

    def run_main(self):
        args = ["run"]

        # Set plusargs
        if self.plusarg:
            plusargs = []
            for key, value in self.plusarg.items():
                plusargs += ["+{}={}".format(key, self._param_value_str(value))]
            args.append("EXTRA_OPTIONS=" + " ".join(plusargs))

        self._run_tool("make", args)
