#!/usr/bin/env python

enums = {
    # OFX spec version
    "OfxVersion": (["102", "103", "151", "160", "200", "201", "202", "203", "210", "211", "220"], "the OFX specification version in use"),

    # Bank/general
    "AcctType": (["Checking", "Savings", "MoneyMrkt", "CreditLine", "CD"], "types of bank accounts"),
    "TrnType": (["Credit", "Debit", "Int", "Div", "Fee", "SrvChg", "Dep", "ATM", "POS", "Xfer", "Check", "Payment", "Cash", "DirectDep", "DirectDebit", "RepeatPmt", "Hold", "Other"], "types of transactions. INT, ATM, and POS depend on the signage of the account."),
    "ImageType": (["Statement", "Transaction", "Tax"], "what this image contains"),
    "ImageRefType": (["Opaque", "URL", "FormURL"], "the type of reference to the image"),
    "CheckSup": (["FrontOnly", "BackOnly", "FrontAndBack"], "what portions of the check this image contains"),
    "CorrectAction": (["Delete", "Replace"], "whether this transaction correction replaces or deletes the transaction matching its CORRECTFITID"),
    "BalType": (["Dollar", "Percent", "Number"], "how this BAL's VALUE field should be interpreted"),

    # InvStmt
    "Inv401kSource": (["PreTax", "AfterTax", "Match", "ProfitSharing", "Rollover", "OtherVest", "OtherNonVest"], "the source of money used for this security in a 401(k) account. Default if not present is OTHERNONVEST. The following cash source types are subject to vesting: MATCH, PROFITSHARING, and OTHERVEST."),
    "SubAcctType": (["Cash", "Margin", "Short", "Other"], "the sub-account type for a source and/or destination of a transaction. Used in fields named SubAcctFrom, SubAcctTo, SubAcctSec, SubAcctFund, HeldInAcct."),
    "BuyType": (["Buy", "BuyToCover"], "types of purchases"),
    "OptAction": (["Exercise", "Assign", "Expire"], "types of actions for options"),
    "TferAction": (["In", "Out"], "whether the transfer is into or out of this account"),
    "PosType": (["Long", "Short"], "position type"),
    "Secured": (["Naked", "Covered"], "how an option is secured"),
    "Duration": (["Day", "GoodTilCancel", "Immediate"], "how long the investment order is good for"),
    "Restriction": (["AllOrNone", "MinUnits", "None"], "a special restriction on an investment order"),
    "UnitType": (["Shares", "Currency"], "type of the UNITS value"),
    "OptBuyType": (["BuyToOpen", "BuyToClose"], "types of purchases for options"),
    "SellType": (["Sell", "SellShort"], "types of sales"),
    "LoanPmtFreq": (["Weekly", "Biweekly", "TwiceMonthly", "Monthly", "FourWeeks", "BiMonthly", "Quarterly", "Semiannually", "Annually", "Other"], "the frequency of loan payments"),
    "IncomeType": (["CGLong", "CGShort", "Div", "Interest", "Misc"], "types of investment income"),
 "SellReason": (["Call", "Sell", "Maturity"], "the reason the sell of a debt security was generated: CALL (the debt was called), SELL (the debt was sold), MATURITY (the debt reached maturity)"),
    "OptSellType": (["SellToClose", "SellToOpen"], "types of sales for options"),
    "RelType": (["Spread", "Straddle", "None", "Other"], "related option transaction types"),

    # Prof
    "CharType": (["AlphaOnly", "NumericOnly", "AlphaOrNumeric", "AlphaAndNumeric"], "types of characters allowed in password"),
    "SyncMode": (["Full", "Lite"], "data synchronization mode supported (see OFX spec for more details)"),
    "OfxSec": (["None", "Type 1"], "the type of application-level security required for the message set"),

    # SecList
    "DebtType": (["Coupon", "Zero"], "debt type"),
    "DebtClass": (["Treasury", "Municipal", "Corporate", "Other"], "the class of debt"),
    "CouponFreq": (["Monthly", "Quarterly", "Semiannual", "Annual", "Other"], "when debt coupons mature"),
    "CallType": (["Call", "Put", "Prefund", "Maturity"], "type of next call (for a debt)"),
    "AssetClass": (["DomesticBond", "IntlBond", "LargeStock", "SmallStock", "IntlStock", "MoneyMrkt", "Other"], "type of asset classes"),
    "MfType": (["OpenEnd", "CloseEnd", "Other"], "types of mutual funds"),
    "OptType": (["Put", "Call"], "whether the option is a PUT or a CALL"),
    "StockType": (["Common", "Preferred", "Convertible", "Other"], "types of stock"),

    # Signup
    "HolderType": (["Individual", "Joint", "Custodial", "Trust", "Other"], "how the account is held"),
    "AcctClassification": (["Personal", "Business", "Corporate", "Other"], "the type of an account"),
    "SvcStatus": (["Avail", "Pend", "Active"], "the status of the account: AVAIL = Available, but not yet requested, PEND = Requested, but not yet available, ACTIVE = In use"),
    "UsProductType": (["401K", "403B", "IRA", "KEOGH", "Other", "SARSEP", "Simple", "Normal", "TDA", "Trust", "UGMA"], "type of investment account (in the US)"),
}

header = """package ofxgo

/*
 * Do not edit this file by hand. It is auto-generated by calling `go generate`.
 * To make changes, edit generate_constants.py, re-run `go generate`, and check
 * in the result.
 */

import (
	"errors"
	"fmt"
	"github.com/aclindsa/xml"
	"strings"
)
"""

template = """
type {enumLower} uint

// {enum}* constants represent {comment}
const (
{constNames})

var {enumLower}s = [...]string{{"{upperValueString}"}}

func (e {enumLower}) Valid() bool {{
	// This check is mostly out of paranoia, ensuring e != 0 should be
	// sufficient
	return e >= {firstValue} && e <= {lastValue}
}}

func (e {enumLower}) String() string {{
	if e.Valid() {{
		return {enumLower}s[e-1]
	}}
	return fmt.Sprintf("invalid {enumLower} (%d)", e)
}}

func (e *{enumLower}) FromString(in string) error {{
	value := strings.TrimSpace(in)

	for i, s := range {enumLower}s {{
		if s == value {{
			*e = {enumLower}(i + 1)
			return nil
		}}
	}}
	*e = 0
	return errors.New("Invalid {enum}: \\\"" + in + "\\\"")
}}

func (e *{enumLower}) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {{
	var value string
	err := d.DecodeElement(&value, &start)
	if err != nil {{
		return err
	}}

	return e.FromString(value)
}}

func (e *{enumLower}) MarshalXML(enc *xml.Encoder, start xml.StartElement) error {{
	if !e.Valid() {{
		return nil
	}}
	enc.EncodeElement({enumLower}s[*e-1], start)
	return nil
}}

// New{enum} returns returns an 'enum' value of type {enumLower} given its
// string representation
func New{enum}(s string) ({enumLower}, error) {{
	var e {enumLower}
	err := e.FromString(s)
	if err != nil {{
		return 0, err
	}}
	return e, nil
}}
"""

with open("constants.go", 'w') as f:
    f.write(header)

    for enum in enums:
        enumLower = enum[:1].lower() + enum[1:].replace(" ", "")
        firstValue = enum+enums[enum][0][0].replace(" ", "")
        lastValue = enum+enums[enum][0][-1].replace(" ", "")

        comment = enums[enum][1]

        constNames = "\t{firstValue} {enumLower} = 1 + iota\n".format(
            enum=enum,
            firstValue=firstValue,
            enumLower=enumLower)
        for value in enums[enum][0][1:]:
            constNames += "\t{enum}{value}\n".format(
                enum=enum,
                value=value.replace(" ", ""))

        upperValueString = "\", \"".join([s.upper() for s in enums[enum][0]])

        f.write(template.format(enum=enum,
                              enumLower=enumLower,
                              comment=comment,
                              firstValue=firstValue,
                              lastValue=lastValue,
                              constNames=constNames,
                              upperValueString=upperValueString))

test_header = """package ofxgo_test

/*
 * Do not edit this file by hand. It is auto-generated by calling `go generate`.
 * To make changes, edit generate_constants.py, re-run `go generate`, and check
 * in the result.
 */

import (
	"github.com/aclindsa/xml"
	"github.com/aclindsa/ofxgo"
	"strings"
	"testing"
)
"""

test_template = """
func Test{enum}(t *testing.T) {{
	e, err := ofxgo.New{enum}("{firstValueUpper}")
	if err != nil {{
		t.Fatalf("Unexpected error creating new {enum} from string \\\"{firstValueUpper}\\\"\\n")
	}}
	if !e.Valid() {{
		t.Fatalf("{enum} unexpectedly invalid\\n")
	}}
	err = e.FromString("{lastValueUpper}")
	if err != nil {{
		t.Fatalf("Unexpected error on {enum}.FromString(\\\"{lastValueUpper}\\\")\\n")
	}}
	if e.String() != "{lastValueUpper}" {{
		t.Fatalf("{enum}.String() expected to be \\\"{lastValueUpper}\\\"\\n")
	}}

	marshalHelper(t, "{lastValueUpper}", &e)

	overwritten, err := ofxgo.New{enum}("THISWILLNEVERBEAVALIDENUMSTRING")
	if err == nil {{
		t.Fatalf("Expected error creating new {enum} from string \\\"THISWILLNEVERBEAVALIDENUMSTRING\\\"\\n")
	}}
	if overwritten.Valid() {{
		t.Fatalf("{enum} created with string \\\"THISWILLNEVERBEAVALIDENUMSTRING\\\" should not be valid\\n")
	}}
	if !strings.Contains(strings.ToLower(overwritten.String()), "invalid") {{
		t.Fatalf("{enum} created with string \\\"THISWILLNEVERBEAVALIDENUMSTRING\\\" should not return valid string from String()\\n")
	}}

	b, err := xml.Marshal(&overwritten)
	if err != nil {{
		t.Fatalf("Unexpected error on xml.Marshal({enum}): %s\\n", err)
	}}
	if string(b) != "" {{
		t.Fatalf("Expected empty string, got '%s'\\n", string(b))
	}}

	unmarshalHelper(t, "{lastValueUpper}", &e, &overwritten)

	err = xml.Unmarshal([]byte("<GARBAGE><!LALDK>"), &overwritten)
	if err == nil {{
		t.Fatalf("Expected error unmarshalling garbage value\\n")
	}}
}}
"""

with open("constants_test.go", 'w') as f:
    f.write(test_header)

    for enum in enums:
        firstValueUpper = enums[enum][0][0].upper()
        lastValueUpper = enums[enum][0][-1].upper()
        f.write(test_template.format(enum=enum,
                              firstValueUpper=firstValueUpper,
                              lastValueUpper=lastValueUpper))