from db import dbGetMany, dbGetOne
from loguru import logger
from decimal import Decimal
import datetime

def perform(dbh, params):
    try:
        createdAt = params['created_at']
    except KeyError:
        createdAt = datetime.datetime.today().strftime("%Y-%m-%d")

    tenants = dbGetMany(dbh, { "statement": "SELECT * FROM tenant_t", "params": () })
    for tenant in tenants:
        logger.info(f"Tenant: {tenant['firstname']} {tenant['lastname']}")

        # check tenancies
        tenancies = dbGetMany(dbh, { 
                "statement": "SELECT * FROM tenancy_t WHERE tenant = %s AND startdate < now() AND (enddate > now() or enddate is null)", 
                "params": (tenant['id'], )
            }
        )
        requests = []
        for tenancy in tenancies:
            fee = dbGetOne(dbh, {
                    "statement": """
                                    SELECT f.amount, f.fee_type
                                        FROM fee_t f, tenancy_fee_mapping_t t
                                        WHERE t.tenancy = %s AND
                                            f.id = t.fee AND
                                            f.startdate < now() AND
                                            (f.enddate > now() OR f.enddate is null)
                                 """,
                    "params": (tenancy['id'], )
                }
            )
            if (tenancy['flat']):
                logger.debug(f"   Flat tenancy: {tenancy['id']}, Fee: {fee['amount']}, Fee_Type: {fee['fee_type']}")
                flat = dbGetOne(dbh, { "statement": "SELECT area FROM flat_t WHERE id = %s", "params": (tenancy['flat'], ) })
                logger.debug(f"   Area: {flat['area']}")
                if (fee['fee_type'] == 'per_area'):
                    feeRequest = flat['area'] * fee['amount']
                else:
                    feeRequest = fee['amount']
                feeRequest = feeRequest.quantize(Decimal('1.00'))
                requests.append({ 
                    'description': f"Miete {tenancy['description']}",
                    'account': tenant['account'],
                    'created_at': createdAt,
                    'amount': feeRequest,
                    'category': 'Mietforderung'
                })
                overheadAdvance = dbGetOne(dbh, {
                        "statement": """
                                        SELECT o.amount
                                            FROM overhead_advance_t o, overhead_advance_flat_mapping_t m
                                            WHERE m.flat = %s AND
                                                o.id = m.overhead_advance AND
                                                o.startdate < now() AND
                                                (o.enddate > now() OR o.enddate is null)
                                     """,
                        "params": (tenancy['flat'], )
                    }
                )
                overheadAdvanceRequest = flat['area'] * overheadAdvance['amount'] 
                overheadAdvanceRequest = overheadAdvanceRequest.quantize(Decimal('1.00'))
                requests.append({ 
                    'description': f"Betriebskosten {tenancy['description']}",
                    'account': tenant['account'],
                    'created_at': createdAt,
                    'amount': overheadAdvanceRequest,
                    'category': 'Betriebskostenforderung'
                })
            if (tenancy['parking']):
                logger.debug(f"   Garage tenancy: {tenancy['id']}, Fee: {fee['amount']}, Fee_Type: {fee['fee_type']}")
                feeRequest = fee['amount']
                feeRequest = feeRequest.quantize(Decimal('1.00'))
                requests.append({ 
                    'description': f"Miete {tenancy['description']}",
                    'account': tenant['account'],
                    'created_at': createdAt,
                    'amount': feeRequest,
                    'category': 'Mietforderung'
                })
            if (tenancy['commercial_premise']):
                logger.debug(f"   Commercial premise tenancy: {tenancy['id']}, Fee: {fee['amount']}, Fee_Type: {fee['fee_type']}")
                feeRequest = fee['amount']
                feeRequest = feeRequest.quantize(Decimal('1.00'))
                requests.append({ 
                    'description': f"Miete {tenancy['description']}",
                    'account': tenant['account'],
                    'created_at': createdAt,
                    'amount': feeRequest,
                    'category': 'Mietforderung'
                })

        for request in requests:
            request['amount'] = Decimal('-1.0') * request['amount']
            logger.info(f"    {request['description']}, {request['account']}, {request['created_at']}, {request['amount']}, {request['category']}")
            accountEntry = dbGetOne(dbh, {
                    "statement": """
                                    INSERT INTO account_entry_t 
                                        (description, account, created_at, amount, account_entry_category)
                                        VALUES (%s, %s, %s, %s, (SELECT id FROM account_entry_category_t WHERE description = %s))
                                        RETURNING id
                                 """,
                    "params": (request['description'], request['account'], request['created_at'], request['amount'], request['category'])
                }
            )
            logger.info(f"    account entry entered with id {accountEntry['id']}")