#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2013  Étienne Loks  <etienne.loks_AT_peacefrogsDOTnet>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# See the file COPYING for details.

DELIMITER = ";"
QUOTECHAR = '"'

import datetime
import re

from django.conf import settings
from django.core.exceptions import ObjectDoesNotExist
from django.template.defaultfilters import slugify

from django.contrib.auth.models import User
from ishtar_common.models import (
    Town,
    Person,
    PersonType,
    OrganizationType,
    Organization,
    SourceType,
)
from archaeological_files.models import PermitType
from archaeological_operations.models import OperationType, Period, ActType


def get_default_person():
    return User.objects.order_by("pk").all()[0]


def _get_parse_string(trunc_number=None):
    def parse_string(value):
        value = value.strip()
        if value == "#EMPTY":
            value = ""
        value = value.replace("  ", " ")
        if trunc_number:
            value = value[:trunc_number]
        return value

    return parse_string


parse_string = _get_parse_string()


def parse_multivalue(value):
    s1 = re.sub("(.)([A-Z][a-z]+)", r"\1 \2", value)
    s1 = re.sub("([a-z0-9])([A-Z])", r"\1 \2", s1)
    return re.sub("([0-9])([a-z])", r"\1 \2", s1)


ope_types = {}


def _init_ope_types():
    for k in settings.ISHTAR_OPE_TYPES.keys():
        ot, created = OperationType.objects.get_or_create(
            txt_idx=settings.ISHTAR_OPE_TYPES[k][0],
            defaults={
                "label": settings.ISHTAR_OPE_TYPES[k][1],
                "preventive": k[0] == "préventive",
            },
        )
        ope_types[k] = ot


def parse_operationtype(value, preventive, owner):
    value = (preventive.strip(), value.strip())
    if not ope_types:
        _init_ope_types()
    if value not in ope_types:
        return None
    return ope_types[value]


periods = {}
periods_keys = []


def _init_period():
    for k in settings.ISHTAR_PERIODS.keys():
        periods[k] = Period.objects.get(txt_idx=settings.ISHTAR_PERIODS[k])
    periods_keys = periods.keys()
    periods_keys.sort(key=len)
    periods_keys.reverse()
    for k in settings.ISHTAR_PERIODS.keys():
        period = Period.objects.get(txt_idx=settings.ISHTAR_PERIODS[k])
        slug = slugify(period.label)
        period_names[slug] = period
        for k in REPLACED_PERIOD_DCT.keys():
            if k in slug:
                period_names[slug.replace(k, REPLACED_PERIOD_DCT[k])] = period
    period_names_keys = period_names.keys()
    period_names_keys.sort(key=len)
    period_names_keys.reverse()


def parse_period(value):
    value = parse_string(value)
    value = value[3:] if value.startswith("EUR") else value
    while value.endswith("-"):
        value = value[:-1]
    value = value[3:] if value.startswith("EUR") else value
    if not periods:
        _init_period()
    if not value:
        return [periods[""]]
    period, old_val = [], ""
    while value and old_val != value:
        old_val = value
        for k in periods_keys:
            if value.startswith(k):
                period.append(periods[k])
                value = value[len(k) :]
                break
    return period


_REPLACED_PERIOD = [("deuxieme", "second")]
_REPLACED_PERIOD += [(y, x) for x, y in _REPLACED_PERIOD]
REPLACED_PERIOD_DCT = dict(_REPLACED_PERIOD)

period_names = {}
period_names_keys = {}


def parse_period_name(value):
    if not period_names:
        _init_period()
    value = parse_string(value)
    if not value:
        return [period_names[""]]
    period, old_val = [], ""
    value = slugify(value)
    while value and old_val != value:
        old_val = value
        for k in period_names_keys:
            if value.startswith(k):
                period.append(period_names[k])
                value = value[len(k) :]
                break
    return period


_CACHED_PERMIT_TYPES = {}


def _init_permit_type():
    for k in settings.ISHTAR_PERMIT_TYPES:
        txt_idx, label = settings.ISHTAR_PERMIT_TYPES[k]
        permit_type, created = PermitType.objects.get_or_create(
            txt_idx=txt_idx, defaults={"label": label, "available": True}
        )
        _CACHED_PERMIT_TYPES[k] = permit_type


def parse_permittype(value):
    value = parse_string(value).lower()
    if not _CACHED_PERMIT_TYPES:
        _init_permit_type()
    if value not in _CACHED_PERMIT_TYPES:
        if "" not in _CACHED_PERMIT_TYPES:
            return
        value = ""
    return _CACHED_PERMIT_TYPES[value]


_CACHED_ADMIN_ACT_TYPES = {}


def parse_admin_act_typ(value, code, owner):
    value = parse_string(value).lower()
    code = parse_string(code).lower()
    if not value or not code:
        return
    if code not in _CACHED_ADMIN_ACT_TYPES:
        act_type, created = ActType.objects.get_or_create(
            txt_idx=code, defaults={"label": value}
        )
        _CACHED_ADMIN_ACT_TYPES[code] = act_type
    return _CACHED_ADMIN_ACT_TYPES[code]


def parse_fileref(value):
    value = parse_string(value).split("/")[0]
    value = value.split(".")[0]
    match = re.search("[0-9].[0-9]*", value)
    if not match:
        return None
    return int(match.group())


def parse_orga(value, alternate_value, owner):
    value = parse_string(value)
    if not value:
        value = parse_string(alternate_value)
        if not value:
            return
    q = Organization.objects.filter(name__iexact=value)
    if q.count():
        return q.all()[0]
    try:
        organization_type = OrganizationType.objects.get(label__iexact=value)
    except ObjectDoesNotExist:
        organization_type = OrganizationType.objects.get(txt_idx="undefined")
    orga = Organization.objects.create(
        name=value, organization_type=organization_type, history_modifier=owner
    )
    return orga


def parse_bool(value):
    value = parse_string(value)
    if value.lower() in ("yes", "oui"):
        value = True
    elif value.lower() in ("no", "non"):
        value = False
    else:
        value = None
    return value


def parse_date(value):
    value = parse_string(value).split(" ")[0]
    try:
        return datetime.datetime.strptime(value, "%d/%m/%Y")
    except:
        return None


def parse_yearref(value):
    value = parse_string(value).split(".")[0]
    match = re.search("[0-9].[0-9]*", value)
    if not match:
        return None
    return int(match.group())


def parse_surface(value):
    value = parse_string(value)
    value = value.replace(",", ".")
    try:
        # hectare en metre carrés
        value = float(value) * 10000
        if value:
            return value
        return None
    except:
        return None


def parse_year(value):
    value = parse_string(value)
    try:
        yr = int(value)
    except ValueError:
        return None
    if yr < 1000 or yr > 2100:
        return None
    return yr


def parse_trunc_patriarche(value):
    value = parse_string(value)
    if not value:
        return
    value = value.replace(" ", "")
    try:
        int(value)
    except ValueError:
        return
    return "18" + str(value)


def parse_operation_code(value):
    value = parse_string(value)
    code = value.split(".")[-1]
    try:
        return int(code)
    except:
        return


def parse_title(value):
    value = parse_string(value)
    if not value:
        return
    return value.title()


def parse_name_surname(value, owner):
    value = parse_string(value)
    items = value.split(" ")
    name = items[0]
    surname = ""
    if len(items) > 1:
        name = " ".join(items[:-1])
        surname = items[-1]
    values = {"surname": parse_title(surname)[:30], "name": parse_title(name)[:30]}
    if not values["surname"] and not values["name"]:
        return
    q = Person.objects.filter(**values)
    if q.count():
        return q.all()[0]
    else:
        defaults = {"history_modifier": owner, "title": ""}
        defaults.update(values)
        p = Person.objects.create(**defaults)
        p.person_types.add(PersonType.objects.get(txt_idx="head_scientist"))
        return p


def parse_person(surname, name, old_ref, owner):
    values = {"surname": parse_title(surname), "name": parse_title(name)}
    if not values["surname"] and not values["name"]:
        return
    q = Person.objects.filter(**values)
    if q.count():
        return q.all()[0]
    else:
        defaults = {"history_modifier": owner, "title": ""}
        defaults.update(values)
        p = Person.objects.create(**defaults)
        p.person_types.add(PersonType.objects.get(txt_idx="head_scientist"))
        return p


def parse_comment_addr_nature(nature, addr, owner):
    addr = parse_string(addr)
    nature = parse_string(nature)
    comments = []
    if nature:
        comments += ["Aménagement :", nature]
    if addr:
        comments += ["Adresse :", addr]
    if not comments:
        return ""
    return "\n".join(comments)


# si pas de start date : premier janvier de year

ope_types = {
    "AET": ("other_study", "Autre étude", True),
    "APP": (
        "assistance_preparation_help",
        "Aide à la préparation de publication",
        True,
    ),
    "DOC": ("documents_study", "Étude documentaire", True),
    "EV": ("evaluation", "Fouille d'évaluation", True),
    "FOU": ("ancient_excavation", "Fouille ancienne", True),
    "FP": ("prog_excavation", "Fouille programmée", False),
    "MH": ("building_study", "Fouille avant MH", True),
    "OPD": ("arch_diagnostic", "Diagnostic archéologique", True),
    "PAN": ("analysis_program", "Programme d'analyses", False),
    "PCR": ("collective_research_project", "Projet collectif de recherche", False),
    "PMS": (
        "specialized_eqp_prospection",
        "Prospection avec matériel spécialisé",
        False,
    ),
    "PRD": ("diachronic_prospection", "Prospection diachronique", False),
    "PI": ("diachronic_prospection", "Prospection diachronique", False),
    "PRM": ("metal_detector_prospection", "Prospection détecteur de métaux", False),
    "PRT": ("thematic_prospection", "Prospection thématique", False),
    "PT": ("thematic_prospection", "Prospection thématique", False),
    "RAR": ("cave_art_record", "Relevé d'art rupestre", False),
    "SD": ("sampling_research", "Sondage", False),
    "SP": ("prev_excavation", "Fouille préventive", True),
    "SU": ("emergency_excavation", "Fouille préventive d'urgence", True),
}

_CACHED_OPE_TYPES = {}


def _prepare_ope_types():
    for k in ope_types.keys():
        txt_idx, label, preventive = ope_types[k]
        ot, created = OperationType.objects.get_or_create(
            txt_idx=txt_idx, defaults={"label": label, "preventive": preventive}
        )
        if k not in _CACHED_OPE_TYPES.keys():
            _CACHED_OPE_TYPES[k] = ot


def parse_patriarche_operationtype(value):
    if value not in _CACHED_OPE_TYPES.keys():
        return None
    return _CACHED_OPE_TYPES[value]


_dpt_re_filter = re.compile("^\([0-9]*\) ")


def parse_ope_name(value):
    if not value:
        return ""
    value = value.strip()
    if value.lower() == "null":
        return ""
    value = _dpt_re_filter.sub("", value)
    return value


def parse_ha(value):
    value = parse_string(value)
    try:
        value = float(value) * 10000
    except:
        value = None
    return value


def parse_rapp_index(value):
    value = parse_string(value)
    items = re.findall(r"[0-9]+$", value)
    if items:
        return int(items[-1])


_CACHED_DOC_TYPES = {}


def parse_doc_types(value):
    value = parse_string(value)
    if value not in _CACHED_DOC_TYPES:
        if value not in settings.ISHTAR_DOC_TYPES:
            return
        _CACHED_DOC_TYPES[value], created = SourceType.objects.get_or_create(
            txt_idx=value, defaults={"label": settings.ISHTAR_DOC_TYPES[value]}
        )
    return _CACHED_DOC_TYPES[value]


def parse_insee(value):
    value = parse_string(value)
    values = []
    while len(value) > 4:
        values.append(value[:5])
        value = value[5:]
    towns = []
    for value in values:
        try:
            town = Town.objects.get(numero_insee=value)
            towns.append(town)
        except:
            # sys.stderr.write('Numero INSEE : %s non existant en base'
            # % value)
            continue
    return towns


PARCEL_YEAR_REGEXP = re.compile(r"^([0-9]{4})[ :]+")
PARCEL_SECTION_REGEXP = re.compile(
    r"(?: )*(?:[Ss]ection(?:s)?)?(?: )*([A-Z][A-Z0-9]{0,3})[ :]*"
    r"((?:(?: |;|,|[Pp]arcelle(?:s)?|n°|et|à|to)*[0-9]+[p]?)+)"
)
PARCEL_NB_RANGE_REGEXP = re.compile(r"([0-9]+[p]?) (?:à|to) ([0-9]+[p]?)")
PARCEL_NB_REGEXP = re.compile(r"(?: |;|,|[Pp]arcelle(?:s)?|n°|et|à|to)*([0-9]+[p]?)")


def parse_parcels(parcel_str, insee_code=None, owner=None):
    parcels, town = [], None
    if insee_code:
        town = parse_insee(insee_code)
        # manage only one town at a time
        assert len(town) < 2
        if not town:
            return parcels
        town = town[0]
    m = PARCEL_YEAR_REGEXP.match(parcel_str)
    year = None
    if m:
        year = m.groups()[0]
        parcel_str = parcel_str[m.span()[1] :]
    for parcel in PARCEL_SECTION_REGEXP.findall(parcel_str):
        sector, nums = parcel[0], parcel[1]
        for num in PARCEL_NB_REGEXP.findall(nums):
            if len(str(num)) > 6:
                continue
            dct = {"year": year, "section": sector, "parcel_number": num}
            if town:
                dct["town"] = town
            if owner:
                dct["history_modifier"] = owner
            parcels.append(dct)
        for parcel_ranges in PARCEL_NB_RANGE_REGEXP.findall(nums):
            lower_range, higher_range = parcel_ranges
            try:
                # the lower range itself has been already kept
                lower_range = int(lower_range) + 1
                higher_range = int(higher_range)
            except ValueError:
                continue
            for num in range(lower_range, higher_range):
                dct = {"year": year, "section": sector, "parcel_number": str(num)}
                if town:
                    dct["town"] = town
                if owner:
                    dct["history_modifier"] = owner
                parcels.append(dct)
    return parcels