from pb.models import IRBInfo, IRBStatus, RequiredDocument, StudyDetails, SelectedUser, Study, IRBInfoEvent, IRBInfoStatus
from pb.forms import StudyTable
from pb import BASE_HREF, app, db, session

from flask import g, render_template, redirect, url_for
from io import TextIOWrapper
from sqlalchemy import func

import datetime
import csv
import requests
import json


def _is_development():
    return 'DEVELOPMENT' in app.config and app.config['DEVELOPMENT']


def _is_production():
    return 'PRODUCTION' in app.config and app.config['PRODUCTION']


def _get_request_uid(req):
    uid = None
    if _is_production():
        if 'user' in g and g.user is not None:
            return g.user.uid
        uid = req.headers.get("Uid")
        if not uid:
            uid = req.headers.get("X-Remote-Uid")
    else:
        uid = 'current_user'

    return uid


def get_current_user(request):
    current_user = _get_request_uid(request)
    return current_user


def get_selected_user(current_user):
    result = db.session.query(SelectedUser).filter(SelectedUser.user_id == current_user).first()
    if result:
        selected_user = result.selected_user
        return selected_user


def update_selected_user(user, selected_user):
    model = SelectedUser(user_id=user, selected_user=selected_user)
    db_selected_user = db.session.query(SelectedUser).filter(SelectedUser.user_id==user).first()
    if db_selected_user:
        db_selected_user.selected_user = selected_user
    else:
        db_selected_user = model
        db.session.add(db_selected_user)
    db.session.commit()
    return db_selected_user


def render_study_template(studies, uva_id):
    table = StudyTable(studies)
    users = []
    [users.append(study.NETBADGEID) for study in db.session.query(Study).all() if study.NETBADGEID not in users]
    return render_template(
        'index.html',
        table=table,
        base_href=BASE_HREF,
        users=users,
        selected_user=uva_id
    )


def _update_study(study, form):
    if study.STUDYID is None:
        # quick hack to get auto-increment without creating a bunch of hassle, this is not
        # production code by any stretch of the imagination, but this is a throw away library.
        max_id = db.session.query(func.max(Study.STUDYID)).scalar() or 1

        study.STUDYID = max_id + 1
    else:
        # Delete existing required documents for this study.
        db.session.query(RequiredDocument).filter(RequiredDocument.STUDYID == study.STUDYID).delete()

    study.TITLE = form.TITLE.data
    study.NETBADGEID = form.NETBADGEID.data
    study.DATE_MODIFIED = datetime.datetime.now()

    for r in form.requirements:
        if r.checked:
            requirement = RequiredDocument(SS_AUXILIARY_DOC_TYPE_ID=r.data, AUXILIARY_DOC=r.label.text, study=study)
            db.session.add(requirement)
            if r.data == 39:
                requirement_2 = RequiredDocument(SS_AUXILIARY_DOC_TYPE_ID=39, AUXILIARY_DOC='Consent-Age of Majority Cover Letter', study=study)
                db.session.add(requirement_2)

    q_data = eval(form.Q_COMPLETE.data)
    if q_data:
        q_data_status = q_data[0]
        q_data_detail = q_data[1]
        q_status = db.session.query(IRBStatus).filter(IRBStatus.STUDYID == study.STUDYID).first()
        if q_status:
            q_status.STATUS = q_data_status
            q_status.DETAIL = q_data_detail
        else:
            q_status = IRBStatus(STATUS=q_data_status, DETAIL=q_data_detail, STUDYID=study.STUDYID)
        db.session.add(q_status)

    db.session.add(study)
    db.session.commit()


def _update_irb_info(study_id, irb_info, form):
    if irb_info is None:
        irb_info = IRBInfo(SS_STUDY_ID=study_id)
        db.session.add(irb_info)
        db.session.commit()
    irb_info.UVA_STUDY_TRACKING = form.UVA_STUDY_TRACKING.data
    irb_info.DATE_MODIFIED = form.DATE_MODIFIED.data
    irb_info.IRB_ADMINISTRATIVE_REVIEWER = form.IRB_ADMINISTRATIVE_REVIEWER.data
    irb_info.AGENDA_DATE = form.AGENDA_DATE.data
    irb_info.IRB_REVIEW_TYPE = form.IRB_REVIEW_TYPE.data
    irb_info.IRB_ONLINE_STATUS = form.IRB_ONLINE_STATUS.data

    # irb_info.IRBEVENT = irb_info_event
    if form.IRBEVENT.data:
        event_data = eval(form.IRBEVENT.data)
        if event_data:
            event_id = event_data[0]
            event = event_data[1]
            irb_info_event = db.session.query(IRBInfoEvent).filter(IRBInfoEvent.STUDY_ID == study_id).first()
            if irb_info_event:
                irb_info_event.EVENT_ID = event_id
                irb_info_event.EVENT = event
            else:
                irb_info_event = IRBInfoEvent(STUDY_ID=study_id, EVENT_ID=event_id, EVENT=event)
            db.session.add(irb_info_event)

    # irb_info.IRB_STATUS = form.IRB_STATUS.data
    if form.IRB_STATUS.data:
        status_data = eval(form.IRB_STATUS.data)
        if status_data:
            status_id = status_data[0]
            status = status_data[1]
            irb_info_status = db.session.query(IRBInfoStatus).filter(IRBInfoStatus.STUDY_ID == study_id).first()
            if irb_info_status:
                irb_info_status.STATUS_ID = status_id
                irb_info_status.STATUS = status
            else:
                irb_info_status = IRBInfoStatus(STUDY_ID=study_id, STATUS_ID=status_id, STATUS=status)
            db.session.add(irb_info_status)

    irb_info.IRB_OF_RECORD = form.IRB_OF_RECORD.data
    irb_info.UVA_IRB_HSR_IS_IRB_OF_RECORD_FOR_ALL_SITES = form.UVA_IRB_HSR_IS_IRB_OF_RECORD_FOR_ALL_SITES.data
    irb_info.STUDYIRBREVIEWERADMIN = form.STUDYIRBREVIEWERADMIN.data

    db.session.add(irb_info)
    db.session.commit()


def _allowed_file(filename):
    allowed_extensions = ['csv', 'xls', 'xlsx']
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in allowed_extensions


def process_csv_study_details(study_id, csv_file):
    study_details = db.session.query(StudyDetails).filter(StudyDetails.STUDYID == study_id).first()
    csv_file.seek(0)
    data = csv.DictReader(TextIOWrapper(csv_file))
    for row in data:
        if data.line_num == 2:

            for key in row.keys():
                if key != 'STUDYID':
                    if hasattr(study_details, key):
                        if key in row.keys():
                            val = row[key]
                            print(key, val)
                            if key == 'SPONSORS_PROTOCOL_REVISION_DATE':
                                print(type(val))
                            if val == '':
                                val = None
                            if val == 'null':
                                val = None
                            setattr(study_details, key, val)

    session.add(study_details)
    session.commit()


def has_no_empty_params(rule):
    defaults = rule.defaults if rule.defaults is not None else ()
    arguments = rule.arguments if rule.arguments is not None else ()
    return len(defaults) >= len(arguments)


def redirect_home():
    return redirect(url_for('index'))


def _get_required_document_list():
    document_list = []
    if _is_production():
        rv = requests.get('https://hrpp.irb.virginia.edu/webservices/crconnect/crconnect.cfc?method=CrConnectAuxDocList')
        if rv.ok:
            document_list = json.loads(rv.text)['CRCONNECTDOCS']

    elif _is_development():
        with open(r'pb/static/json/aux_doc_list.json') as file:
            data = file.read()
            obj = json.loads(data)
            document_list = obj['CRCONNECTDOCS']

    return document_list


def compare_the_lists(a, b):
    if len(a) != len(b):
        return False
    for x in a:
        if x not in b:
            return False
    for y in b:
        if y not in a:
            return False
    return True


def verify_required_document_list():
    """We can view the master list at https://hrpp.irb.virginia.edu/webservices/crconnect/crconnect.cfc?method=CrConnectAuxDocList
       Locally, the list is hardcoded into models.RequiredDocument.
       This is not good. We need to automate this."""

    # Grab the two lists--that are formatted differently,
    # and build something we can compare.
    local = RequiredDocument.all()
    local_documents_list = []
    for loc in local:
        local_documents_list.append({'SS_AUXILIARY_DOC_TYPE_ID': loc.SS_AUXILIARY_DOC_TYPE_ID, 'AUXILIARY_DOC': loc.AUXILIARY_DOC})

    required_documents_list = []
    master_list = _get_required_document_list()
    if master_list:
        for doc in master_list:
            doc['AUXILIARY_DOC'] = doc['AUXILIARY_DOC'].replace("\r", '')
            doc['AUXILIARY_DOC'] = doc['AUXILIARY_DOC'].replace("\n", '')
            required_documents_list.append({'SS_AUXILIARY_DOC_TYPE_ID': doc['SS_AUXILIARY_DOC_TYPE'], 'AUXILIARY_DOC': doc['AUXILIARY_DOC']})

    verify = compare_the_lists(required_documents_list, local_documents_list)
    if not verify:
        # Printing this so it is easier to update the hardcoded list in models.RequiredDocument
        to_print = '['
        for rd in required_documents_list:
            to_print += f"RequiredDocument(SS_AUXILIARY_DOC_TYPE_ID={rd['SS_AUXILIARY_DOC_TYPE_ID']}, AUXILIARY_DOC=\"{rd['AUXILIARY_DOC']}\"), "
        to_print += ']'
        print(to_print)
    return verify


def _get_study_details_list():
    details_list = []
    if _is_production():
        rv = requests.get('https://hrpp.irb.virginia.edu/webservices/crconnect/crconnect.cfc?method=Study&studyid=15370')
        if rv.ok:
            details_list = json.loads(rv.text)

    elif _is_development():
        with open(r'pb/static/json/study_details_list.json') as file:
            data = file.read()
            obj = json.loads(data)
            details_list = obj

    return details_list


def verify_study_details_list():
    study_details_list = _get_study_details_list()
    study_details = study_details_list[0]
    details = []
    for key in study_details.keys():
        details.append(key)
    column_statement = "select column_name from information_schema.columns where table_name = 'study_details'"
    result = session.execute(column_statement)
    column_names = []
    for row in result:
        column_names.append(row[0])
    verify = compare_the_lists(details, column_names)
    if not verify:
        missing_details, extra_columns = _process_study_details(details, column_names)
        # Print this to make it easier to update the table
        print(f'Missing Details: {missing_details}')
        print(f'Extra Columns: {extra_columns}')
    return verify


def _process_study_details(details, column_names):
    missing_details = []
    extra_columns = []
    for x in details:
        if x not in column_names:
            missing_details.append(x)
    for y in column_names:
        if y not in details:
            extra_columns.append(y)
    return missing_details, extra_columns