from abc import abstractproperty

from ..hdl import *
from ..lib.cdc import ResetSynchronizer
from ..build import *


__all__ = ["QuicklogicPlatform"]


class QuicklogicPlatform(TemplatedPlatform):
    """
    Symbiflow toolchain
    -------------------
    Required tools:
        * ``symbiflow_synth``
        * ``symbiflow_pack``
        * ``symbiflow_place``
        * ``symbiflow_route``
        * ``symbiflow_write_fasm``
        * ``symbiflow_write_bitstream``
    The environment is populated by running the script specified in the environment variable
    ``NMIGEN_ENV_QLSymbiflow``, if present.
    Available overrides:
        * ``add_constraints``: inserts commands in XDC file.
    """

    device  = abstractproperty()
    part    = abstractproperty()

    # Since the QuickLogic version of SymbiFlow toolchain is not upstreamed yet
    # we should distinguish the QuickLogic version from mainline one.
    # QuickLogic toolchain: https://github.com/QuickLogic-Corp/quicklogic-fpga-toolchain/releases
    toolchain = "QLSymbiflow"

    required_tools = [
        "symbiflow_synth",
        "symbiflow_pack",
        "symbiflow_place",
        "symbiflow_route",
        "symbiflow_write_fasm",
        "symbiflow_write_bitstream"
    ]
    file_templates = {
        **TemplatedPlatform.build_script_templates,
        "{{name}}.v": r"""
            /* {{autogenerated}} */
            {{emit_verilog()}}
        """,
        "{{name}}.debug.v": r"""
            /* {{autogenerated}} */
            {{emit_debug_verilog()}}
        """,
        "{{name}}.pcf": r"""
            # {{autogenerated}}
            {% for port_name, pin_name, attrs in platform.iter_port_constraints_bits() -%}
                set_io {{port_name}} {{pin_name}}
            {% endfor %}
        """,
        "{{name}}.xdc": r"""
            # {{autogenerated}}
            {% for port_name, pin_name, attrs in platform.iter_port_constraints_bits() -%}
                {% for attr_name, attr_value in attrs.items() -%}
                    set_property {{attr_name}} {{attr_value}} [get_ports {{port_name|tcl_escape}} }]
                {% endfor %}
            {% endfor %}
            {{get_override("add_constraints")|default("# (add_constraints placeholder)")}}
        """,
        "{{name}}.sdc": r"""
            # {{autogenerated}}
            {% for net_signal, port_signal, frequency in platform.iter_clock_constraints() -%}
                {% if port_signal is not none -%}
                    create_clock -period {{100000000/frequency}} {{port_signal.name|ascii_escape}}
                {% endif %}
            {% endfor %}
        """
    }
    command_templates = [
        r"""
        {{invoke_tool("symbiflow_synth")}}
            -t {{name}}
            -v {% for file in platform.iter_extra_files(".v", ".sv", ".vhd", ".vhdl") -%} {{file}} {% endfor %} {{name}}.v
            -d {{platform.device}}
            -p {{name}}.pcf
            -P {{platform.part}}
            -x {{name}}.xdc
        """,
        r"""
        {{invoke_tool("symbiflow_pack")}}
            -e {{name}}.eblif
            -d {{platform.device}}
            -s {{name}}.sdc
        """,
        r"""
        {{invoke_tool("symbiflow_place")}}
            -e {{name}}.eblif
            -d {{platform.device}}
            -p {{name}}.pcf
            -n {{name}}.net
            -P {{platform.part}}
            -s {{name}}.sdc
        """,
        r"""
        {{invoke_tool("symbiflow_route")}}
            -e {{name}}.eblif
            -d {{platform.device}}
            -s {{name}}.sdc
        """,
        r"""
        {{invoke_tool("symbiflow_write_fasm")}}
            -e {{name}}.eblif
            -d {{platform.device}}
            -s {{name}}.sdc
        """,
        r"""
        {{invoke_tool("symbiflow_write_bitstream")}}
            -f {{name}}.fasm
            -d {{platform.device}}
            -P {{platform.part}}
            -b {{name}}.bit
        """
    ]

    # Common logic

    def __init__(self):
        super().__init__()

    def add_clock_constraint(self, clock, frequency):
        super().add_clock_constraint(clock, frequency)
        clock.attrs["keep"] = "TRUE"