import os.path
from doit.exceptions import TaskFailed
from doit.tools import check_timestamp_unchanged
from configclass import Config

class KicadDoitTasks(object):
    config = Config({
        "sch": None,
        "kicad_pcb": None,
        "gerber_dir": None,
        "gerber_zip": None,
        "components_dir": None,
        })

    def __init__(self, *args, **kwargs):
        self.config = self.config.make(kwargs)

    def echo(*args, **kwargs):
        print("_task: args={}, kwars={}".format(args, kwargs))

    def tasks(self, *args, **kwargs):
        import ee.kicad
        kicad_pcb = self.config["kicad_pcb"]
        sch = self.config["sch"]
        tasks = []

        gerber_dir = self.config["gerber_dir"]
        if gerber_dir:
            gerber_zip = self.config["gerber_zip"] or "{}.zip".format(gerber_dir)
            #print("gerber_zip={}".format(gerber_zip))

            eg = next((p for p in (os.path.join(p, "export_gerber.py") for p in ee.kicad.__path__) if os.path.isfile(p)), None)
            if not eg:
                raise Exception("Could not find export_gerber.py")

            # TODO: replace with python
            mkdir = "mkdir -p {}".format(gerber_dir)
            export_gerber = " ".join([
                eg,
                "--pcb", kicad_pcb,
                "--output-directory", gerber_dir,
                "--protel-extensions",
            ])
            def make_zip():
                import zipfile
                from pathlib import Path
                with zipfile.ZipFile(gerber_zip, "w") as z:
                    for p in Path(gerber_dir).iterdir():
                        if not p.is_file():
                            continue
                        z.write(p, arcname=p.relative_to(gerber_dir))

            tasks.append({
                "name": "kicad_gerber",
                "targets": [gerber_zip],
                "actions": [mkdir, export_gerber, make_zip],
                "file_dep": [kicad_pcb],
            })

        components_dir = self.config["components_dir"]
        if sch and components_dir:
            tasks.append(task_sch_to_component_files(sch, components_dir))

        for t in tasks:
            yield t


def task_sch_to_component_files(sch, components_dir):
    def action():
        import ee.kicad
        from ee.kicad.model import Component, ComponentField
        import csv
        import configparser
        from ee.fact import Fact

        schematics = ee.kicad.read_schematics(sch)
        cs = [c for c in schematics.components]
        os.makedirs(components_dir, exist_ok=True)
        # TODO: remove directory?
        for c in cs:
            path = os.path.join(components_dir, "{}.ini".format(c.timestamp))
            ini = configparser.ConfigParser(interpolation = None)
            if os.path.isfile(path) and ini.read(path) != [path]:
                print("Could not load component file: {}".format(path))
                return False
#            if ini.has_section("kicad-schematic"):
#                ini.remove_section("kicad-schematic")
#            ini.add_section("kicad-schematic")
#            ini.set("kicad-schematic", "ref", c.ref)
#            ini.set("kicad-schematic", "ref-type", c.ref_type)
            fact = Fact("schematic-symbol")
            ks = fact.view("kicad-schematic")
            ks.set("ref", c.ref)
            ks.set("ref-type", c.ref_type)
            if c.has_ref_num:
#                ini.set("kicad-schematic", "ref-num", str(c.ref_num))
                ks.set("ref-num", str(c.ref_num))
#            ini.set("kicad-schematic", "value", c.value)
            ks.set("value", c.value)
            if c.footprint:
#                ini.set("kicad-schematic", "footprint", c.footprint)
                ks.set("footprint", c.footprint)

            fields = [f for f in c.fields if f.value and f.name not in ComponentField.names]

            if fields:
#                if ini.has_section("kicad-fields"):
#                    ini.remove_section("kicad-fields")
#                ini.add_section("kicad-fields")
                kf = fact.kv("kicad-fields")
                for f in fields:
                    kf.set(f.name, str(f.value))
            
            with open(path, "w", newline="") as f:
#                ini.write(f)
                fact.write(f)

    component_files_cookie = "{}/components.cookie".format(components_dir)
    gen_cookie = "date > %(targets)s"
    return {
        "name": "sch_to_component_files",
        "file_dep": [sch],
        "actions": [action, gen_cookie],
        "targets": [component_files_cookie],
    }