from kivy.app import App
from kivy.factory import Factory
from kivy.properties import ObjectProperty
from kivy.lang import Builder
from kivy.clock import Clock
from kivy.uix.label import Label

from electrum_gui.kivy.i18n import _
from datetime import datetime
from electrum.util import InvalidPassword

Builder.load_string('''

<TxDialog>
    id: popup
    title: _('Transaction')
    is_mine: True
    can_sign: False
    can_broadcast: False
    can_rbf: False
    fee_str: ''
    date_str: ''
    amount_str: ''
    tx_hash: ''
    status_str: ''
    description: ''
    outputs_str: ''
    BoxLayout:
        orientation: 'vertical'
        ScrollView:
            GridLayout:
                height: self.minimum_height
                size_hint_y: None
                cols: 1
                spacing: '10dp'
                padding: '10dp'
                GridLayout:
                    height: self.minimum_height
                    size_hint_y: None
                    cols: 1
                    spacing: '10dp'
                    BoxLabel:
                        text: _('Status')
                        value: root.status_str
                    BoxLabel:
                        text: _('Description') if root.description else ''
                        value: root.description
                    BoxLabel:
                        text: _('Date') if root.date_str else ''
                        value: root.date_str
                    BoxLabel:
                        text: _('Amount sent') if root.is_mine else _('Amount received')
                        value: root.amount_str
                    BoxLabel:
                        text: _('Transaction fee') if root.fee_str else ''
                        value: root.fee_str
                TopLabel:
                    text: _('Outputs') + ':'
                OutputList:
                    height: self.minimum_height
                    size_hint: 1, None
                    id: output_list
                TopLabel:
                    text: _('Transaction ID') + ':' if root.tx_hash else ''
                TxHashLabel:
                    data: root.tx_hash
                    name: _('Transaction ID')
        Widget:
            size_hint: 1, 0.1

        BoxLayout:
            size_hint: 1, None
            height: '48dp'
            Button:
                size_hint: 0.5, None
                height: '48dp'
                text: _('Sign') if root.can_sign else _('Broadcast') if root.can_broadcast else _('Bump fee') if root.can_rbf else ''
                disabled: not(root.can_sign or root.can_broadcast or root.can_rbf)
                opacity: 0 if self.disabled else 1
                on_release:
                    if root.can_sign: root.do_sign()
                    if root.can_broadcast: root.do_broadcast()
                    if root.can_rbf: root.do_rbf()
            IconButton:
                size_hint: 0.5, None
                height: '48dp'
                icon: 'atlas://gui/kivy/theming/light/qrcode'
                on_release: root.show_qr()
            Button:
                size_hint: 0.5, None
                height: '48dp'
                text: _('Close')
                on_release: root.dismiss()
''')


class TxDialog(Factory.Popup):

    def __init__(self, app, tx):
        Factory.Popup.__init__(self)
        self.app = app
        self.wallet = self.app.wallet
        self.tx = tx

    def on_open(self):
        self.update()

    def update(self):
        format_amount = self.app.format_amount_and_units
        tx_hash, self.status_str, self.description, self.can_broadcast, self.can_rbf, amount, fee, height, conf, timestamp, exp_n = self.wallet.get_tx_info(self.tx)
        self.tx_hash = tx_hash or ''
        if timestamp:
            self.date_str = datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
        elif exp_n:
            self.date_str = _('Within %d blocks') % exp_n if exp_n > 0 else _('unknown (low fee)')
        else:
            self.date_str = ''

        if amount is None:
            self.amount_str = _("Transaction unrelated to your wallet")
        elif amount > 0:
            self.is_mine = False
            self.amount_str = format_amount(amount)
        else:
            self.is_mine = True
            self.amount_str = format_amount(-amount)
        self.fee_str = format_amount(fee) if fee is not None else _('unknown')
        self.can_sign = self.wallet.can_sign(self.tx)
        self.ids.output_list.update(self.tx.outputs())

    def do_rbf(self):
        from .bump_fee_dialog import BumpFeeDialog
        is_relevant, is_mine, v, fee = self.wallet.get_wallet_delta(self.tx)
        size = self.tx.estimated_size()
        d = BumpFeeDialog(self.app, fee, size, self._do_rbf)
        d.open()

    def _do_rbf(self, old_fee, new_fee, is_final):
        if new_fee is None:
            return
        delta = new_fee - old_fee
        if delta < 0:
            self.app.show_error("fee too low")
            return
        try:
            new_tx = self.wallet.bump_fee(self.tx, delta)
        except BaseException as e:
            self.app.show_error(str(e))
            return
        if is_final:
            new_tx.set_rbf(False)
        self.tx = new_tx
        self.update()
        self.do_sign()

    def do_sign(self):
        self.app.protected(_("Enter your PIN code in order to sign this transaction"), self._do_sign, ())

    def _do_sign(self, password):
        self.status_str = _('Signing') + '...'
        Clock.schedule_once(lambda dt: self.__do_sign(password), 0.1)

    def __do_sign(self, password):
        try:
            self.app.wallet.sign_transaction(self.tx, password)
        except InvalidPassword:
            self.app.show_error(_("Invalid PIN"))
        self.update()

    def do_broadcast(self):
        self.app.broadcast(self.tx)

    def show_qr(self):
        from electrum.bitcoin import base_encode, bfh
        text = bfh(str(self.tx))
        text = base_encode(text, base=43)
        self.app.qr_dialog(_("Raw Transaction"), text)
