from datetime import datetime, timedelta, timezone
import hashlib
import json
import logging
import os
import os.path
import re
import urllib.parse
import urllib.request

from PIL import Image, ImageDraw, ImageFont

def whenStr(date, now):
    if date < now + timedelta(days=1):
        if date.minute <= 9:
            return f"{date.hour}h0{date.minute}"
        else:
            return f"{date.hour}h{date.minute}"
    elif date < now + timedelta(days=7):
        weekday = date.weekday()
        if weekday == 0:
            return "lundi"
        elif weekday == 1:
            return "mardi"
        elif weekday == 2:
            return "mercredi"
        elif weekday == 3:
            return "jeudi"
        elif weekday == 4:
            return "vendredi"
        elif weekday == 5:
            return "samedi"
        else:
            return "dimanche"
    else:
        return date.strftime("%d %b")

class IDFMAPI:

    fnt_R_path = "Parisine-Regular.ttf"
    fnt_RB_path = "Parisine-Bold.ttf"

    lines = {
        "metros": {
            "1": "C01371",
            "2": "C01372",
            "3": "C01373",
            "4": "C01374",
            "5": "C01375",
            "6": "C01376",
            "7": "C01377",
            "8": "C01378",
            "9": "C01379",
            "10": "C01380",
            "11": "C01381",
            "12": "C01382",
            "13": "C01383",
            "14": "C01384",
            "3B": "C01386",
            "7B": "C01387",
        },
        "buses": {
            "57": "C01094",
            "125": "C01154",
            #"131": "C01159",
            "184": "C01205",
        },
        "rers": {
            "A": "C01742",
            "B": "C01743",
            "C": "C01727",
            "D": "C01728",
            "E": "C01729"
        },
        "tramways": {
            "T2": "C01390",
            "T3A": "C01391",
            "T3B": "C01679",
            "T7": "C01774",
            "T9": "C02317",
        },
    }



    def __init__(self, config, apikey=None):
        self.fnt_R_path = os.path.join(config.fonts_dir, IDFMAPI.fnt_R_path)
        self.fnt_RB_path = os.path.join(config.fonts_dir, IDFMAPI.fnt_RB_path)

        self.baseurl = "https://prim.iledefrance-mobilites.fr/marketplace/disruptions_bulk"
        self.apikey = apikey or os.environ["TOKEN_IDFM"]

        self._cached_file = ".ratp-%s.cache"
        self.cache_timeout = config.cache_timeout
        self.max_cache_timeout = config.max_cache_timeout

    def fromHTMLDisruption(src):
        cleanr = re.compile('<.*?>')
        cleanrA = re.compile('<a.*?>.*?</a>')
        period = re.compile('Période :[^.]+. ')
        period2 = re.compile('Dates? :[^.]+. ')
        more = re.compile(" Plus d'informations sur [^.]+.")
        return re.sub(cleanr, '', re.sub(cleanrA, '', re.sub(period, '', re.sub(period2, '', re.sub(more, '', src.replace('&nbsp;', ' ').replace('&#160;', ' ').replace('&#8217;', "'").replace('&#224;', 'à').replace('&#233;', 'é').replace('&#232;', 'è').replace('&#234;', 'ê').replace('&#251;', 'û').replace('&#206;', 'Î').replace('<br>', ' ').replace('</p>', '  ').replace('Information Ile de France Mobilités :', '').replace("Les horaires du calculateur d'itinéraire tiennent compte des travaux. ", '').replace("à la demande de la Préfecture de Police et d'Île-de-France Mobilités, et ", '')))))).replace(" Pour plus d'informations,.", '').replace(" Pour plus d'informations, .", '').strip()

    def get_schedules(self, mode, line, station, way="A+R"):
        if mode == "M":
            mode = "metros"
        elif mode == "R":
            mode = "rers"
        elif mode == "T":
            mode = "tramways"
            line = line[1:]
        elif mode == "B":
            mode = "buses"
        elif mode == "N":
            mode = "noctiliens"

        cache_file = self._cached_file % ("schedule-" + mode + "-" + line + "-" + hashlib.md5((mode + line + station + way).encode()).hexdigest())

        req = urllib.request.Request("https://ratp.p0m.fr/api/schedules/%s/%s/%s/%s" % (mode, line, station, way))
        try:
            with urllib.request.urlopen(req) as f:
                with open(cache_file, 'wb') as fd:
                    fd.write(f.read())
        except ConnectionResetError as e:
            logging.exception(e)
        except urllib.error.URLError as e:
            logging.exception(e)
        except urllib.error.HTTPError as e:
            logging.exception(e)

        with open(cache_file) as f:
            res = json.load(f)

            # Convert time to hours
            now = datetime.fromisoformat(res["_metadata"]["date"] if len(res["_metadata"]["date"]) <= 25 else res["_metadata"]["date"][0:19] + res["_metadata"]["date"][len(res["_metadata"]["date"])-6:])

            for i in range(len(res["result"]["schedules"])):
                if "message" in res["result"]["schedules"][i]:
                    if res["result"]["schedules"][i]["message"] == "Train a l'approche" or res["result"]["schedules"][i]["message"] == "Train à l'approche" or res["result"]["schedules"][i]["message"] == "Train à quai" or res["result"]["schedules"][i]["message"] == "Train a quai" or res["result"]["schedules"][i]["message"] == "A l'approche" or res["result"]["schedules"][i]["message"] == "A l'arret" or res["result"]["schedules"][i]["message"] == "A l'arrêt" or res["result"]["schedules"][i]["message"] == "A quai":
                        res["result"]["schedules"][i]["message"] = now.strftime("%H:%M")
                    elif res["result"]["schedules"][i]["message"].endswith(" mn"):
                        res["result"]["schedules"][i]["message"] = (now + timedelta(minutes=int(res["result"]["schedules"][i]["message"].split(" ")[0]))).strftime("%H:%M")
                    res["result"]["schedules"][i]["message"] = res["result"]["schedules"][i]["message"].replace(" Retardé", "+").replace("Train retardé", "++").replace("Retardé", "++")

            return [m for m in res["result"]["schedules"] if "message" in m and m["message"] != "Train sans arrêt"]

    def get_weather(self):
        cache_file = self._cached_file % ("ratp-disruptions")
        # Read the mod time
        statinfo = None
        try:
            statinfo = os.stat(cache_file)
        except:
            pass

        if statinfo is None or datetime.fromtimestamp(statinfo.st_mtime, tz=timezone.utc) + timedelta(minutes=self.cache_timeout) < datetime.now(tz=timezone.utc):
            # Do the request and save it
            req = urllib.request.Request(self.baseurl + "/disruptions/v2")
            req.headers["apikey"] = self.apikey
            try:
                with urllib.request.urlopen(req) as f:
                    with open(cache_file, 'wb') as fd:
                        fd.write(f.read())
            except ConnectionResetError:
                pass

        try:
            statinfo = os.stat(cache_file)
        except:
            pass

        if statinfo is None or datetime.fromtimestamp(statinfo.st_mtime, tz=timezone.utc) + timedelta(minutes=self.max_cache_timeout) < datetime.now(tz=timezone.utc):
            raise Exception("File too old")

        # Retrieve cached data
        res = {}
        with open(cache_file) as f:
            res = json.load(f)

        disruptions = {}
        for d in res["disruptions"]:
            disruptions[d["id"]] = d

        ret = {}

        for mode in IDFMAPI.lines:
            ret[mode] = {}
            for line in IDFMAPI.lines[mode]:
                ret[mode][line] = self.get_line_weather(res, disruptions, mode, line)

        return ret

    def get_line_weather(self, res, disruptions, mode, line):
        for l in res["lines"]:
            if l["id"] == "line:IDFM:" + IDFMAPI.lines[mode][line]:
                disruptionIds = []
                disruptionTypes = {}
                for impactedObject in l["impactedObjects"]:
                    for disruptionId in impactedObject["disruptionIds"]:
                        if disruptionId not in disruptionIds:
                            disruptionTypes[disruptionId] = impactedObject["type"]
                            disruptionIds.append(disruptionId)

                for disruptionId in disruptionIds:
                        impactType = disruptionTypes[disruptionId]
                        status = "past"
                        for ap in disruptions[disruptionId]["applicationPeriods"]:
                            end = datetime.strptime(ap["end"], "%Y%m%dT%H%M%S")
                            if end < datetime.now():
                                continue

                            begin = datetime.strptime(ap["begin"], "%Y%m%dT%H%M%S")
                            if begin > datetime.now():
                                status = "future"
                                continue

                            status = "active"
                            break

                        if "cause" in disruptions and disruptions["cause"] == "INFORMATION":
                            continue

                        disruptions[disruptionId]["status"] = status
                        disruptions[disruptionId]["scope"] = impactType
                        yield disruptions[disruptionId]

        return None

    def get_line_icon(config, mode, line, size, fill="gray", state=""):
        if mode == "M" or mode == "metros":
            icon_mode = "metro"
            mode = "metros"
            line = line.replace("B", "bis")
        elif mode == "T" or mode == "tramways":
            icon_mode = "tram"
            mode = "tramways"
            line = line.replace("T", "").lower()
        elif mode == "R" or mode == "rers":
            icon_mode = "RER"
            mode = "rers"
        elif mode == "B":
            mode = "buses"

        img_line = None
        if mode == "rers" and fill != "white":
            img = Image.new('RGBA', (size * 2, int(size * 2 * 1.25)), '#fff0')
            draw = ImageDraw.Draw(img)

            fnt_icon = ImageFont.truetype(os.path.join(config.fonts_dir, IDFMAPI.fnt_RB_path), size*2-9)
            draw.rounded_rectangle((0, 0, size*2-1, size*2-1), 7, outline=fill, width=2)
            draw.text((size, size), line, fill=fill, anchor="mm", font=fnt_icon)

        elif mode == "buses":
            width = int(size * 1.38)
            img = Image.new('RGBA', (width, width), '#fff0')
            draw = ImageDraw.Draw(img)

            fnt_icon = ImageFont.truetype(os.path.join(config.fonts_dir, IDFMAPI.fnt_RB_path), size-3)
            draw.rectangle((0, 0, width, size), fill)
            draw.text((int(width / 2), int(size / 2)), line, fill="white", anchor="mm", font=fnt_icon)

        elif fill == "white":
            img = Image.open(os.path.join(config.icons_dir, "ratp", "lignes", icon_mode + "_" + line + "_NB" + state + "_RVB.png"))
            return img.resize((int(size), int(img.height * size / img.width)))

        else:
            img_line = Image.open(os.path.join(config.icons_dir, "ratp", "lignes", icon_mode + "_" + line + "_NB_RVB.png"))
            img = Image.new(img_line.mode, (img_line.width, int(img_line.height * 1.4)))
            if mode != "rers":
                img.paste(Image.new("RGB", (img_line.width, img_line.height), fill), (0,0), img_line)
            else:
                img.paste(img_line, (0,0))

        if state != "":
            if state.endswith("petit"):
                coeff = 2.5
            elif state.endswith("moyen"):
                coeff = 2
            else:
                coeff = 1.5

            img_perturb = Image.open(os.path.join(config.icons_dir, "ratp", "Perturbation_travaux_NB_RVB.png" if state.startswith("_travaux") else "Perturbation_trafic_NB_RVB.png"))
            img_perturb = img_perturb.resize((int(img.width / coeff), int(img_perturb.height * img.width / (coeff * img_perturb.width))))
            if img_line is not None:
                img.paste(img_perturb, (img.width-img_perturb.width,img_line.height-int(img_perturb.height/coeff)))
            else:
                img.paste(img_perturb, (img.width-img_perturb.width,img.height-img_perturb.height))

        return img.resize((int(size), int(img.height * size / img.width)))



class RATPWeatherModule:

    def __init__(self, major_lines=["M7", "M5", "M14", "RB", "T3A"]):
        self.major_lines = major_lines

    def gen_alerts(self, config):
        alerts = []

        weather = IDFMAPI(config).get_weather()
        id_seens = []
        for mode in weather:
            for line in weather[mode]:
                if mode[0].upper() + line not in self.major_lines:
                    continue

                def alert_icon(mode, line, state):
                    def icon(size=64):
                        image = Image.new('RGB', (size, size), '#000')

                        line_icon = IDFMAPI.get_line_icon(config, mode, line, int(size/2), fill="white", state=state)
                        if state == "":
                            white = Image.new('RGB', (line_icon.width, line_icon.height), '#fff')
                            image.paste(white, (int(size/4),0), line_icon)
                        else:
                            image.paste(line_icon, (int(size/4),0), line_icon)

                        return image
                    return icon

                for disruption in weather[mode][line]:
                    if "message" not in disruption:
                        continue

                    if disruption["id"] in id_seens:
                        continue

                    if disruption["status"] != "active" and "applicationPeriods" not in disruption:
                        continue

                    subtitle = ""
                    oneline = False
                    state_type = ""
                    state_importance = ""

                    if "applicationPeriods" in disruption:
                        now = datetime.now()
                        yesterday = now + timedelta(days=-1)
                        nextweek = now + timedelta(days=1)

                        application_periods = []
                        for ap in disruption["applicationPeriods"]:
                            begin = datetime.strptime(ap["begin"], "%Y%m%dT%H%M%S")
                            end = datetime.strptime(ap["end"], "%Y%m%dT%H%M%S")

                            if end < now:
                                continue
                            elif begin > nextweek:
                                continue
                            elif len(application_periods) > 0 and application_periods[0]["begin"] + timedelta(hours=16) < begin:
                                continue
                            else:
                                application_periods.append({"begin": begin, "end": end})

                            if begin < yesterday:
                                oneline = True

                            if "cause" in disruption and disruption["cause"].lower() == "travaux" and begin > now:
                                oneline = True
                                state_type = "travaux"
                            elif "cause" in disruption and disruption["cause"].lower() == "travaux":
                                state_type = "travaux"
                            else:
                                state_type = "trafic"

                            if "severity" in disruption:
                                if disruption["severity"] == "NO_SERVICE" or disruption["severity"] == "BLOQUANTE":
                                    state_importance = "grand"
                                elif disruption["severity"] == "REDUCED_SERVICE" or disruption["severity"] == "UNKNOWN_EFFECT" or disruption["severity"] == "OTHER_EFFECT":
                                    state_importance = "moyen"
                                else:
                                    state_importance = "petit"

                        if len(application_periods) == 0:
                            continue
                        elif len(application_periods) == 1:
                            if application_periods[0]["begin"] > now:
                                subtitle = "De " + whenStr(application_periods[0]["begin"], now) + " à " + whenStr(application_periods[0]["end"], now)
                            elif application_periods[0]["end"] > now:
                                subtitle = "Fin " + whenStr(application_periods[0]["end"], now)

                    id_seens.append(disruption["id"])
                    yield {
                        "title": disruption["title"],
                        "subtitle": subtitle,
                        "description": IDFMAPI.fromHTMLDisruption(disruption["message"]),
                        "icon": alert_icon(mode, line, ("_" + state_type + "_" + state_importance) if state_type != "" else ""),
                        "oneline": oneline,
                    }

    def draw_module(self, config, width, height, line_height=22):
        image = Image.new('RGB', (width, height), '#fff')
        draw = ImageDraw.Draw(image)

        weather = IDFMAPI(config).get_weather()

        align_x = 0
        align_y = 0
        for mode in ["metros", "rers", "tramways", "buses"]:
            if mode != "rers" and mode != "buses":
                align_x = 0

            for line in weather[mode]:
                if align_x + line_height >= width:
                    align_x = 0
                    align_y += int(1.5 * line_height)

                states = []
                for disruption in weather[mode][line]:
                    status = "past"
                    for ap in disruption["applicationPeriods"]:
                        end = datetime.strptime(ap["end"], "%Y%m%dT%H%M%S")
                        if end < datetime.now():
                            continue

                        begin = datetime.strptime(ap["begin"], "%Y%m%dT%H%M%S")
                        if begin > datetime.now():
                            status = "future"
                            continue

                        status = "active"
                        break

                    if status != "active":
                        continue
                    if "severity" in disruption:
                        if disruption["cause"] == "TRAVAUX":
                            states.append(disruption["severity"] + " " + disruption["cause"])
                        else:
                            states.append(disruption["severity"])

                state = ""
                fill = "darkgray"
                if disruption["scope"] == "line" and ("NO_SERVICE" in states or "BLOQUANTE" in states):
                    fill = "black"
                    state = "_trafic_grand"
                elif "PERTURBEE" in states:
                    fill = "brown"
                    state = "_trafic_moyen"
                elif "REDUCED_SERVICE" in states or "UNKNOWN_EFFECT" in states or "OTHER_EFFECT" in states or "NO_SERVICE" in states or "BLOQUANTE" in states:
                    fill = "teal"
                    state = "_trafic_moyen"
                elif "BLOQUANTE TRAVAUX" in states:
                    fill = "teal"
                    state = "_travaux_moyen"
                elif "INFORMATION" in states:
                    state = "_travaux_petit"
                elif len(states) > 0:
                    fill = "gray"
                    state = "_trafic_petit"

                icon = IDFMAPI.get_line_icon(config, mode, line, line_height, fill=fill, state=state)
                image.paste(icon, (align_x, align_y), icon)

                align_x += icon.width + 5

            if mode != "metros" and mode != "tramways":
                align_y += int(1.5 * line_height)
            else:
                align_x += int(1.5 * line_height)

        return image


class RATPNextStopModule:

    def draw_module(self, config, stops, width, height, line_height=17):
        image = Image.new('RGB', (width, height), '#fff')
        draw = ImageDraw.Draw(image)

        alerts = []

        fnt_R = ImageFont.truetype(os.path.join(config.fonts_dir, IDFMAPI.fnt_R_path), line_height)
        fnt_B = ImageFont.truetype(os.path.join(config.fonts_dir, IDFMAPI.fnt_RB_path), line_height)

        align = 0

        mint = datetime.now() + timedelta(minutes=10)

        api = IDFMAPI(config)
        for stop in stops:
            tmp = stop.split("/", 2)
            mode = tmp[0][0]
            line = tmp[0][1:]
            try:
                if 1 < len(tmp) < 4:
                    prep = {}
                    for s in api.get_schedules(mode, line, *tmp[1:]):
                        # Skip too close items
                        try:
                            t = datetime.strptime(datetime.now().strftime("%Y-%m-%dT") + s["message"][0:5], "%Y-%m-%dT%H:%M")
                            if t < mint:
                                continue
                        except:
                            pass

                        if s["destination"] not in prep:
                            prep[s["destination"]] = []
                        prep[s["destination"]].append(s)

                    icon = IDFMAPI.get_line_icon(config, mode, line, int(line_height*(1.5 if len(prep.keys()) > 1 else 1)))
                    image.paste(icon, (0, align), icon)

                    max_dest = 64
                    for dest, msgs in prep.items():
                        if len(msgs) == 0:
                            continue

                        align_x = line_height * 2

                        sz = fnt_B.getlength(dest)
                        while sz > max_dest:
                            dest = dest[:-1]
                            sz = fnt_B.getlength(dest)

                        draw.text(
                            (align_x, align),
                            dest,
                            font=fnt_B, anchor="lt", fill="black"
                        )

                        align_x += max_dest + int(line_height/2.5)

                        for msg in [] + msgs:
                            draw.text(
                                (align_x, align),
                                msg["message"],
                                font=fnt_R, anchor="lt", fill="black"
                            )
                            align_x += fnt_R.getlength(msg["message"]) + int(line_height/2.5)

                        align += line_height
                    align += int(line_height * 0.33)
            except Exception as e:
                alerts.append({
                    "title": "Impossible de récupérer les horaires du " + mode + line + " pour " + tmp[1],
                    "description": type(e).__name__ + ": " + (e.message if hasattr(e, 'message') else str(e)),
                    "icon": "weather/wi-earthquake.png",
                })

        align -= int(line_height * 0.33)
        if align < 0:
            align = 0
        image = image.crop((0,0,width, min(align, height)))

        return image, alerts