import os
from wtforms.validators import ValidationError
import platform, re, readline
currOS = platform.platform()
if currOS.find('Windows') == 0:
    LOCALBASE = 'D:/website/'
else:
    LOCALBASE = '/mnt/d/website/'

#LOCALBASE would normally be '' (a contributors directory) when this is
#in production mode.
#This would be a separate app from the main website, launched in a
#separate directory, with perhaps a few links to certain files in 
#the main website base directory. The user would have read access
#to template.ft3 but rw access only to files in their own subdirectory.

# GLOBALS
NAMESFILE = LOCALBASE + "names.tsv"
INSTSFILE = LOCALBASE + "insts.tsv"
TYPESFILE = LOCALBASE + "types.tsv"
CONTRIBDIR = LOCALBASE + 'contributors/'
#This will change when everything is debugged
#PERSONALDIR = CONTRIBDIR + lastName + firstName[0]
PERSONDIR = CONTRIBDIR
TEMPLATE = LOCALBASE + 'contributors/template.ft3'

def make_list(flList):
    liOut = []
    stList = flList.read()
    lsIn = stList.split('\n')
    for line in lsIn:
        stOut = ''
        line = line.strip()
        lsRec = line.split('\t')
        if flList == flNames:
            if len(lsRec) < 2:
                stOut = lsRec[0]
            else:
                stOut = lsRec[1] + ' ' + lsRec[0]
            liOut.append(stOut)
        elif flList == flInsts: # it's an instrument list
            if len(lsRec) >= 2:
                liOut.append(lsRec[1])
        else: #it's a music type list
            liOut.append(lsRec[0])
    return liOut

flNames = open(NAMESFILE, 'r', encoding='latin1')
if not flNames:
    print("Cannot open ", NAMESFILE)
else:
    liNames = make_list(flNames)
flInsts = open(INSTSFILE, 'r', encoding='latin1')
if not flInsts:
    print("Cannot open ", INSTSFILE)
else:
    liInsts = make_list(flInsts)
flTypes = open(TYPESFILE, 'r', encoding='latin1')
if not flTypes:
    print("Cannot open ", TYPESFILE)
else:
    liTypes = make_list(flTypes)

def strip_list(liIn):
    n = 0
    for item in liIn:
        item = item.strip()
        liIn[n] = item
        n += 1
    return liIn

def key_val(form, field):
    stIn = field.data
    stIn = stIn.strip()
    liKeyList = strip_list(stIn.split(','))
    badKeys = []
    goodKeys = []
    for mKey in liKeyList:
        if not re.fullmatch('[A-G][#b]?[Mm]', mKey):
            badKeys.append(mKey)
        else:
            goodKeys.append(mKey)
    if len(badKeys) > 0:
        stErr = ','.join(badKeys)
        stErr = 'Bad Keys: ' + stErr
        raise ValidationError(stErr)

def type_val(form, field):
    global liTypes
    stTypes = field.data
    typeList = stTypes.strip()
    liTypeList = typeList.split(',')
    liTypeList = strip_list(liTypeList)
    badTypes = []
    goodTypes = []
    for mtype in liTypeList:
        if not mtype in liTypes:
            badTypes.append(mtype)
        else:
            goodTypes.append(mtype)
    if len(badTypes) > 0:
        stBad = ','.join(badTypes)
        stErr = 'Invalid music type[s]: ' + stBad
        raise ValidationError(stErr)

def ensemble_val(form, field):
    global liInsts
    stInsts = field.data
    stInsts = stInsts.strip()
    liEnsemble = stInsts.split(',')
    liEnsemble = strip_list(liEnsemble)
    badInsts = []
    goodInsts = []
    for inst in liEnsemble:
        if not inst in liInsts:
            badInsts.append(inst)
        else:
            goodInsts.append(inst)
    if len(badInsts) > 0:
        stBad = ','.join(badInsts)
        stErr = 'Invalid instrument[s]: ' + stBad
        raise ValidationError(stErr)


def source_val(form, field):
    stIn = field.data
    stIn = stIn.strip()
#   if not re.fullmatch('A', stIn):
    if re.match('[A-Z]{1,2}-', stIn):
        if not re.match('[A-Z]{1,2}-[A-Z]{1,3}[a-z]*:?', stIn):
            stErr = 'Mangled library siglum: ' + stIn
            raise ValidationError(stErr)

def page_val(form, field):
    stIn = field.data
    stIn = stIn.strip()
    liPageList = strip_list(stIn.split(','))
    badPages = []
    goodPages = []
    for stPage in liPageList:
        if re.match('[0-9]', stPage):
            if not re.fullmatch('[0-9]+v?[a-m]?', stPage):
                badPages.append(stPage)
            else:
                goodPages.append(stPage)
        elif re.match('[%#]', stPage):
            if not re.fullmatch('[%#][0-9]*', stPage):
                badPages.append(stPage)
            else:
                goodPages.append(stPage)
        elif re.match('[a-zA-Z]', stPage):
            val = re.fullmatch('([a-zA-Z])([a-zA-Z]?)[1-8]v?[a-m]?', stPage)
            if not val:
                badPages.append(stPage)
            elif val.group(2) and (val.group(1) != val.group(2)):
                badPages.append(stPage)
            else:
                goodPages.append(stPage)
        else:
            badPages.append(stPage)
    if len(badPages) > 0:
        stErr = ','.join(badPages)
        stErr = 'Bad pages: ' + stErr
        raise ValidationError(stErr)

def section_val(form, field):
    stIn = field.data
    stIn = stIn.strip()
    if not re.fullmatch('[1-9][0-9]*\. [A-Z].*', stIn):
        raise ValidationError("Section name must start with a number, followed by a . and a space")

def find_file(stFile):
    return os.path.exists(stFile)

def name_val(form, field):
    return True
    stInput = latin1_to_ascii(field.data)
    val = re.search('([^ ][^ ]*) *([A-Za-z])..*', stInput)
    if not val:
        stErr = 'Cannot parse name: "' + stInput + '". Need <first name> + space + <last name>.'
        raise ValidationError(stErr)
    stInput =val.group(2) + val.group(1).upper()[0]
    if os.path_writeable(stInput):
        return True
    else:
        print('No home directory for ', stInput)
        return False

def output_val(form, field):
    stOutput = field.data
    if stOutput.find('/') != -1 or stOutput.find('\\') != -1:
        stErr = 'Cannot have a slash in the file name.'
        raise ValidationError(stErr)
    stOutput = PERSONDIR + stOutput
    if not stOutput.endswith('.ft3'):
        stOutput = stOutput + '.ft3'
    if os.access(PERSONDIR, os.F_OK) and os.access(PERSONDIR, os.W_OK):
        f = open(stOutput, 'w')
        if not f:
            stErr = 'Camnnot write to ' + stOutput + '.'
            raise ValidationError(stErr)
        else:
            # Close here and remove, because it will be opened in proc.py
            f.close()
            os.remove(stOutput)
    else:
        stErr = 'Directory ' + PERSONDIR + 'not writable or executable.'
        raise ValidationError(stErr)

def input_val(form, field):
    stInput = field.data
    if stInput == '':
        stInput = TEMPLATE
    if not find_file(stInput):
        stErr = 'Input file: ' + stInput + ' not found.'
        raise ValidationError(stErr)