import csv

import re

def float2(value, default=0.0):
    if value is None:
        return default
    try:
        return float(value)
    except ValueError:
        return default

print("Detta program rapporterar skillnader mellan verifikat som refererar till varandra genom beskrivningen av verifikatet. Den utgår från krediter och hittar matchande debeter")

lines = []
result = []
with open("konto.csv", "r") as file:
    lines = file.readlines()

startLine = 12

# READING

for i, line in enumerate(lines):
    if "Konto" in line and "Verifikation" in line:
        startLine = i
        break

with open("konto.csv", "w") as file:
    file.writelines(lines[startLine:-1])

with open("konto.csv", "r") as file:
    csvreader = csv.DictReader(file, delimiter=";")
    for row in csvreader:
        result.append(row)
with open("konto.csv", "w") as file:
    file.writelines(lines)

# FILE RESTORED, PARSE DATA

krediter = {}
debeter = {}
verfs = {}
sums = {}
header = result.pop(0)
for line in result:
    if not line['"Verifikation"']:
        continue
    verf = line['"Verifikation"'].replace(" ","")
    if verf not in verfs.keys():
        verfs[verf] = line
        verfs[verf]['"Kredit"'] = float2(line['"Kredit"'].replace(",",".").replace(" ",""))
        verfs[verf]['"Debet"'] = float2(line['"Debet"'].replace(",",".").replace(" ",""))
    else:
        verfs[verf]['"Kredit"'] += float2(line['"Kredit"'].replace(",",".").replace(" ",""))
        verfs[verf]['"Debet"'] += float2(line['"Debet"'].replace(",",".").replace(" ",""))

## ELIMINATE CORRECTIONS

verfs = dict(reversed(sorted(verfs.items(), key = lambda x: int(x[0][1:]))))

print(f"All verfs {len(verfs)}")

corrections = []
for verf, line in verfs.items():
    if "Korrigering" in line['"Beskrivning"']:
        corrections.append(verf)
toDelete = []
missingVerfs = []
for verf, line in verfs.items():
    if verf in list(map(lambda x: x[0], toDelete)):
        continue
    if "Korrigering" in line['"Beskrivning"']:
        toRemove = re.findall("(A\d+)(?:\D){0,1}",line['"Beskrivning"'])[0]
        if toRemove not in verfs.keys():
            missingVerfs.append(toRemove)
        else:
            targetSum = verfs[toRemove]['"Debet"'] - verfs[toRemove]['"Kredit"']
            correctionSum = line['"Debet"'] - line['"Kredit"']
            if abs(targetSum + correctionSum) < 0.0001:
                #print(f"Deleting {verfs[toRemove]}")
                #print(f"because of {line}")
                #print("")
                toDelete.append((toRemove, verf))

print(f"VARNING! {missingVerfs} saknas i verifikat listan men refereras till av korrektioner!")

print(f"Tar bort {len(toDelete)} korrigeringspar...")
for v, k in toDelete:
    print(v, k)
    del verfs[v]
    del verfs[k]

print(f"All verfs {len(verfs)}, All corrections {len(toDelete)*2}")

## FINISH PARSING DATA
for verf, line in verfs.items():
    if line['"Kredit"'] > 0:
        krediter[verf] = line
    elif line['"Debet"'] > 0:
        debeter[verf] = line

# FIND DIFFS AND LOG INTO DATA STRUCTURE
for kVerf, kLine in krediter.items():
    sums[kVerf] = {"value": -kLine['"Kredit"'], "debets": [], "date": kLine['"Datum"']}
print(sums)
toDel = []
for dVerf, dLine in debeter.items():
    debetVal = dLine['"Debet"']
    for kVerf in re.findall("(A\d+)(?:\D){0,1}",dLine['"Beskrivning"']):
        if debetVal == 0:
            continue
        if kVerf not in sums:
            if kVerf not in corrections:
                print(f"oopsie, {kVerf} finns inte som kreditverifikat")
            continue
        sumVal = sums[kVerf]["value"] 
        if abs(sumVal + debetVal) < 0.0001:
            sums[kVerf]["value"] = 0
            debetVal = 0
            toDel.append(dVerf)
        elif sumVal + debetVal < 0:
            sums[kVerf]["value"] = sumVal + debetVal
            debetVal = 0
            toDel.append(dVerf)
        else:
            sums[kVerf]["value"] = sumVal + debetVal
            debetVal = debetVal - sumVal
        sums[kVerf]["debets"] = sums[kVerf]["debets"] + [dVerf] 
for dVerf in list(set(toDel)):
    #print(dVerf)
    del debeter[dVerf]


print(f"All verfs {len(debeter) + len(krediter)}, All corrections {len(toDelete)*2}, All matched debeter {len(toDel)}")



# PRINT!

total = 0

for verf, a in sums.items():
    if abs(a["value"]) > 0.0001:
        total += a["value"]
        print(verf, ": ", a)
    else:
        print(f"oki, paid verf {verf}: {a}")
print("Här kommer omatchade debeter")
for debet, debetLine in debeter.items():
    print(debet + ": " + debetLine['"Beskrivning"'] + " -- ", debetLine['"Debet"'])
    total += debetLine['"Debet"']
print(total)