#!/usr/bin/python
# -*- coding: latin-1 -*-
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.

"Módulo para manejo de archivos SQL"

__author__ = "Mariano Reingart (reingart@gmail.com)"
__copyright__ = "Copyright (C) 2014 Mariano Reingart"
__license__ = "GPL 3.0"

from decimal import Decimal

DEBUG = False
CAE_NULL = None
FECHA_VTO_NULL = None
RESULTADO_NULL = None
NULL = None


def esquema_sql(tipos_registro, conf={}):
    from .formato_txt import A, N, I

    for tabla, formato in tipos_registro:
        sql = []
        sql.append("CREATE TABLE %s (" % tabla)
        if tabla != 'encabezado':
            # agrego id como fk
            id = [('id', 15, N)]
        else:
            id = []
        for (clave, longitud, tipo) in id + formato:
            clave_orig = clave
            if conf:
                if tabla == 'encabezado':
                    clave = conf["encabezado"].get(clave, clave)
                if tabla == 'detalle':
                    clave = conf["detalle"].get(clave, clave)
                if tabla == 'iva':
                    clave = conf["iva"].get(clave, clave)
                if tabla == 'tributo':
                    clave = conf["tributo"].get(clave, clave)
                if tabla == 'cmp_asoc':
                    clave = conf["cmp_asoc"].get(clave, clave)
                if tabla == 'permiso':
                    clave = conf["permiso"].get(clave, clave)
            if isinstance(longitud, (tuple, list)):
                longitud, decimales = longitud
            else:
                decimales = 2
            sql.append("    %s %s %s%s%s" % (
                clave,
                {N: 'INTEGER', I: 'NUMERIC', A: 'VARCHAR'}[tipo],
                {I: "(%s, %s)" % (longitud, decimales), A: '(%s)' % longitud, N: ''}[tipo],
                clave == 'id' and (tabla == 'encabezado' and " PRIMARY KEY" or " FOREING KEY encabezado") or "",
                formato[-1][0] != clave_orig and "," or ""))
        sql.append(")")
        sql.append(";")
        if DEBUG:
            print('\n'.join(sql))
        yield '\n'.join(sql)


def configurar(schema):
    tablas = {}
    campos = {}
    campos_rev = {}
    if not schema:
        for tabla in "encabezado", "detalle", "cmp_asoc", "permiso", "tributo", "iva":
            tablas[tabla] = tabla
            campos[tabla] = {"id": "id"}
            campos_rev[tabla] = dict([(v, k) for k, v in list(campos[tabla].items())])
    return tablas, campos, campos_rev


def ejecutar(cur, sql, params=None):
    # print sql, params
    if params is None:
        return cur.execute(sql)
    else:
        return cur.execute(sql, params)


def max_id(db, schema={}):
    cur = db.cursor()
    tablas, campos, campos_rev = configurar(schema)
    query = ("SELECT MAX(%%(id)s) FROM %(encabezado)s" % tablas) % campos["encabezado"]
    if DEBUG:
        print("ejecutando", query)
    ret = None
    try:
        ejecutar(cur, query)
        for row in cur:
            ret = row[0]
        if not ret:
            ret = 0
        # print "MAX_ID = ", ret
        return ret
    finally:
        cur.close()


def redondear(formato, clave, valor):
    from .formato_txt import A, N, I
    # corregir redondeo (aparentemente sqlite no guarda correctamente los decimal)
    import decimal
    try:
        long = [fmt[1] for fmt in formato if fmt[0] == clave]
        tipo = [fmt[2] for fmt in formato if fmt[0] == clave]
        if not tipo:
            return valor
        tipo = tipo[0]
        if DEBUG:
            print("tipo", tipo, clave, valor, int)
        if valor is None:
            return None
        if valor == "":
            return ""
        if tipo == A:
            return valor
        if tipo == N:
            return int(valor)
        if isinstance(valor, (int, float)):
            valor = str(valor)
        if isinstance(valor, str):
            valor = Decimal(valor)
        if int and isinstance(int[0], (tuple, list)):
            decimales = Decimal('1') / Decimal(10**(int[0][1]))
        else:
            decimales = Decimal('.01')
        valor1 = valor.quantize(decimales, rounding=decimal.ROUND_DOWN)
        if valor != valor1 and DEBUG:
            print("REDONDEANDO ", clave, decimales, valor, valor1)
        return valor1
    except Exception as e:
        print("IMPOSIBLE REDONDEAR:", clave, valor, e)


def escribir(facts, db, schema={}, commit=True):
    from .formato_txt import ENCABEZADO, DETALLE, TRIBUTO, IVA, CMP_ASOC, PERMISO, DATO
    tablas, campos, campos_rev = configurar(schema)
    cur = db.cursor()
    try:
        for dic in facts:
            if not 'id' in dic:
                dic['id'] = max_id(db, schema={}) + 1
            query = "INSERT INTO %(encabezado)s (%%s) VALUES (%%s)" % tablas
            fields = ','.join([campos["encabezado"].get(k, k) for k, t, n in ENCABEZADO if k in dic])
            values = ','.join(['?' for k, t, n in ENCABEZADO if k in dic])
            if DEBUG:
                print("Ejecutando2: %s %s" % (query % (fields, values), [dic[k] for k, t, n in ENCABEZADO if k in dic]))
            ejecutar(cur, query % (fields, values), [dic[k] for k, t, n in ENCABEZADO if k in dic])
            query = ("INSERT INTO %(detalle)s (%%(id)s, %%%%s) VALUES (?, %%%%s)" % tablas) % campos["detalle"]
            for item in dic['detalles']:
                fields = ','.join([campos["detalle"].get(k, k) for k, t, n in DETALLE if k in item])
                values = ','.join(['?' for k, t, n in DETALLE if k in item])
                if DEBUG:
                    print("Ejecutando: %s %s" % (query % (fields, values), [dic['id']] + [item[k] for k, t, n in DETALLE if k in item]))
                ejecutar(cur, query % (fields, values), [dic['id']] + [item[k] for k, t, n in DETALLE if k in item])
            if 'cbtes_asoc' in dic and tablas["cmp_asoc"]:
                query = ("INSERT INTO %(cmp_asoc)s (%%(id)s, %%%%s) VALUES (?, %%%%s)" % tablas) % campos["cmp_asoc"]
                for item in dic['cbtes_asoc']:
                    fields = ','.join([campos["cmp_asoc"].get(k, k) for k, t, n in CMP_ASOC if k in item])
                    values = ','.join(['?' for k, t, n in CMP_ASOC if k in item])
                    if DEBUG:
                        print("Ejecutando: %s %s" % (query % (fields, values), [dic['id']] + [item[k] for k, t, n in CMP_ASOC if k in item]))
                    ejecutar(cur, query % (fields, values), [dic['id']] + [item[k] for k, t, n in CMP_ASOC if k in item])
            if 'permisos' in dic:
                query = ("INSERT INTO %(permiso)s (%%(id)s, %%%%s) VALUES (?, %%%%s)" % tablas) % campos["permiso"]
                for item in dic['permisos']:
                    fields = ','.join([campos["permiso"].get(k, k) for k, t, n in PERMISO if k in item])
                    values = ','.join(['?' for k, t, n in PERMISO if k in item])
                    if DEBUG:
                        print("Ejecutando: %s %s" % (query % (fields, values), [dic['id']] + [item[k] for k, t, n in PERMISO if k in item]))
                    ejecutar(cur, query % (fields, values), [dic['id']] + [item[k] for k, t, n in PERMISO if k in item])
            if 'tributos' in dic:
                query = ("INSERT INTO %(tributo)s (%%(id)s, %%%%s) VALUES (?, %%%%s)" % tablas) % campos["tributo"]
                for item in dic['tributos']:
                    fields = ','.join([campos["tributo"].get(k, k) for k, t, n in TRIBUTO if k in item])
                    values = ','.join(['?' for k, t, n in TRIBUTO if k in item])
                    if DEBUG:
                        print("Ejecutando: %s %s" % (query % (fields, values), [dic['id']] + [item[k] for k, t, n in TRIBUTO if k in item]))
                    ejecutar(cur, query % (fields, values), [dic['id']] + [item[k] for k, t, n in TRIBUTO if k in item])
            if 'ivas' in dic:
                query = ("INSERT INTO %(iva)s (%%(id)s, %%%%s) VALUES (?, %%%%s)" % tablas) % campos["iva"]
                for item in dic['ivas']:
                    fields = ','.join([campos["iva"].get(k, k) for k, t, n in IVA if k in item])
                    values = ','.join(['?' for k, t, n in IVA if k in item])
                    if DEBUG:
                        print("Ejecutando: %s %s" % (query % (fields, values), [dic['id']] + [item[k] for k, t, n in IVA if k in item]))
                    ejecutar(cur, query % (fields, values), [dic['id']] + [item[k] for k, t, n in IVA if k in item])
        if commit:
            db.commit()
    finally:
        pass


def modificar(fact, db, schema={}, webservice="wsfev1", ids=None, conf_db={}):
    from .formato_txt import ENCABEZADO, DETALLE, TRIBUTO, IVA, CMP_ASOC, PERMISO, DATO
    update = ['cae', 'fecha_vto', 'resultado', 'reproceso', 'motivo_obs', 'err_code', 'err_msg', 'cbte_nro']
    tablas, campos, campos_rev = configurar(schema)
    cur = db.cursor()
    if fact['cae'] == 'NULL' or fact['cae'] == '' or fact['cae'] is None:
        fact['cae'] = CAE_NULL
        fact['fecha_vto'] = FECHA_VTO_NULL
    if 'null' in conf_db and fact['resultado'] is None or fact['resultado'] == '':
        fact['resultado'] = RESULTADO_NULL
    for k in ['reproceso', 'motivo_obs', 'err_code', 'err_msg']:
        if 'null' in conf_db and k in fact and fact[k] is None or fact[k] == '':
            if DEBUG:
                print(k, "NULL")
            fact[k] = NULL
    try:
        query = ("UPDATE %(encabezado)s SET %%%%s WHERE %%(id)s=?" % tablas) % campos["encabezado"]
        fields = [campos["encabezado"].get(k, k) for k, t, n in ENCABEZADO if k in update and k in fact]
        values = [fact[k] for k, t, n in ENCABEZADO if k in update and k in fact]
        query = query % ','.join(["%s=?" % f for f in fields])
        if DEBUG:
            print(query, values + [fact['id']])
        ejecutar(cur, query, values + [fact['id']])
        db.commit()
    except BaseException:
        raise
    finally:
        pass


def leer(db, schema={}, webservice="wsfev1", ids=None, **kwargs):
    from .formato_txt import ENCABEZADO, DETALLE, TRIBUTO, IVA, CMP_ASOC, PERMISO, DATO
    tablas, campos, campos_rev = configurar(schema)
    cur = db.cursor()
    if kwargs:
        query = ("SELECT * FROM %(encabezado)s" % tablas)
    elif not ids:
        query = ("SELECT * FROM %(encabezado)s WHERE (%%(resultado)s IS NULL OR %%(resultado)s='' OR %%(resultado)s=' ') AND (%%(id)s IS NOT NULL) AND %%(webservice)s=? ORDER BY %%(tipo_cbte)s, %%(punto_vta)s, %%(cbte_nro)s" % tablas) % campos["encabezado"]
        ids = [webservice]
    else:
        query = ("SELECT * FROM %(encabezado)s WHERE " % tablas) + " OR ".join(["%(id)s=?" % campos["encabezado"] for id in ids])
    if DEBUG:
        print("ejecutando", query, ids)
    try:
        ejecutar(cur, query, ids)
        rows = cur.fetchall()
        description = cur.description
        for row in rows:
            detalles = []
            encabezado = {}
            for i, k in enumerate(description):
                val = row[i]
                if isinstance(val, str):
                    val = val.decode(CHARSET)
                if isinstance(val, str):
                    val = val.strip()
                key = campos_rev["encabezado"].get(k[0], k[0].lower())
                val = redondear(ENCABEZADO, key, val)
                encabezado[key] = val
            # print encabezado
            detalles = []
            if DEBUG:
                print(("SELECT * FROM %(detalle)s WHERE %%(id)s = ?" % tablas) % campos["detalle"], [encabezado['id']])
            ejecutar(cur, ("SELECT * FROM %(detalle)s WHERE %%(id)s = ?" % tablas) % campos["detalle"], [encabezado['id']])
            for it in cur.fetchall():
                detalle = {}
                for i, k in enumerate(cur.description):
                    val = it[i]
                    if isinstance(val, str):
                        val = val.decode(CHARSET)
                    key = campos_rev["detalle"].get(k[0], k[0].lower())
                    val = redondear(DETALLE, key, val)
                    detalle[key] = val
                detalles.append(detalle)
            encabezado['detalles'] = detalles

            cmps_asoc = []
            if DEBUG:
                print(("SELECT * FROM %(cmp_asoc)s WHERE %%(id)s = ?" % tablas) % campos["cmp_asoc"], [encabezado['id']])
            ejecutar(cur, ("SELECT * FROM %(cmp_asoc)s WHERE %%(id)s = ?" % tablas) % campos["cmp_asoc"], [encabezado['id']])
            for it in cur.fetchall():
                cmp_asoc = {}
                for i, k in enumerate(cur.description):
                    val = it[i]
                    key = campos_rev["cmp_asoc"].get(k[0], k[0].lower())
                    cmp_asoc[key] = val
                cmps_asoc.append(cmp_asoc)
            if cmps_asoc:
                encabezado['cbtes_asoc'] = cmps_asoc

            permisos = []
            if DEBUG:
                print(("SELECT * FROM %(permiso)s WHERE %%(id)s = ?" % tablas) % campos["permiso"], [encabezado['id']])
            ejecutar(cur, ("SELECT * FROM %(permiso)s WHERE %%(id)s = ?" % tablas) % campos["permiso"], [encabezado['id']])
            for it in cur.fetchall():
                permiso = {}
                for i, k in enumerate(cur.description):
                    val = it[i]
                    key = campos_rev["permiso"].get(k[0], k[0].lower())
                    permiso[key] = val
                permisos.append(permiso)
            if permisos:
                encabezado['permisos'] = permisos

            ivas = []
            if DEBUG:
                print(("SELECT * FROM %(iva)s WHERE %%(id)s = ?" % tablas) % campos["iva"], [encabezado['id']])
            ejecutar(cur, ("SELECT * FROM %(iva)s WHERE %%(id)s = ?" % tablas) % campos["iva"], [encabezado['id']])
            for it in cur.fetchall():
                iva = {}
                for i, k in enumerate(cur.description):
                    val = it[i]
                    key = campos_rev["iva"].get(k[0], k[0].lower())
                    val = redondear(IVA, key, val)
                    iva[key] = val
                ivas.append(iva)
            if ivas:
                encabezado['ivas'] = ivas

            tributos = []
            if DEBUG:
                print(("SELECT * FROM %(tributo)s WHERE %%(id)s = ?" % tablas) % campos["tributo"], [encabezado['id']])
            ejecutar(cur, ("SELECT * FROM %(tributo)s WHERE %%(id)s = ?" % tablas) % campos["tributo"], [encabezado['id']])
            for it in cur.fetchall():
                tributo = {}
                for i, k in enumerate(cur.description):
                    val = it[i]
                    key = campos_rev["tributo"].get(k[0], k[0].lower())
                    val = redondear(TRIBUTO, key, val)
                    tributo[key] = val
                tributos.append(tributo)
            if tributos:
                encabezado['tributos'] = tributos

            yield encabezado
        db.commit()
    finally:
        cur.close()


def ayuda():
    print("-- Formato:")
    from .formato_txt import ENCABEZADO, DETALLE, TRIBUTO, IVA, CMP_ASOC, DATO, PERMISO
    tipos_registro = [
        ('encabezado', ENCABEZADO),
        ('detalle', DETALLE),
        ('tributo', TRIBUTO),
        ('iva', IVA),
        ('cmp_asoc', CMP_ASOC),
        ('permiso', PERMISO),
        ('dato', DATO),
    ]
    print("-- Esquema:")
    for sql in esquema_sql(tipos_registro):
        print(sql)


if __name__ == "__main__":
    ayuda()