# -*- coding: utf-8 -*-

# Copyright (c) 2020 tecnovert
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.

import json
import time
import urllib.parse

from .util import format8
from .basicswap import (
    strBidState,
)
from .ui import (
    PAGE_LIMIT,
    inputAmount,
    describeBid,
    setCoinFilter,
)


def js_error(self, error_str):
    error_str_json = json.dumps({'error': error_str})
    return bytes(error_str_json, 'UTF-8')


def js_wallets(self, url_split, post_string):
    return bytes(json.dumps(self.server.swap_client.getWalletsInfo()), 'UTF-8')


def js_offers(self, url_split, post_string, sent=False):
    if len(url_split) > 3:
        if url_split[3] == 'new':
            if post_string == '':
                raise ValueError('No post data')
            form_data = urllib.parse.parse_qs(post_string)
            offer_id = self.postNewOffer(form_data)
            rv = {'offer_id': offer_id.hex()}
            return bytes(json.dumps(rv), 'UTF-8')
        offer_id = bytes.fromhex(url_split[3])

    filters = {
        'coin_from': -1,
        'coin_to': -1,
        'page_no': 1,
        'limit': PAGE_LIMIT,
        'sort_by': 'created_at',
        'sort_dir': 'desc',
    }
    if post_string != '':
        post_data = urllib.parse.parse_qs(post_string)
        filters['coin_from'] = setCoinFilter(form_data, b'coin_from')
        filters['coin_to'] = setCoinFilter(form_data, b'coin_to')

        if b'sort_by' in post_data:
            sort_by = post_data[b'sort_by'][0].decode('utf-8')
            assert(sort_by in ['created_at', 'rate']), 'Invalid sort by'
            filters['sort_by'] = sort_by
        if b'sort_dir' in post_data:
            sort_dir = post_data[b'sort_dir'][0].decode('utf-8')
            assert(sort_dir in ['asc', 'desc']), 'Invalid sort dir'
            filters['sort_dir'] = sort_dir

        if b'offset' in post_data:
            filters['offset'] = int(post_data[b'offset'][0])
        if b'limit' in post_data:
            filters['limit'] = int(post_data[b'limit'][0])
            assert(filters['limit'] > 0 and filters['limit'] <= PAGE_LIMIT), 'Invalid limit'

    offers = self.server.swap_client.listOffers(sent, filters)
    rv = []
    for o in offers:
        ci_from = self.server.swap_client.ci(o.coin_from)
        ci_to = self.server.swap_client.ci(o.coin_to)
        rv.append({
            'offer_id': o.offer_id.hex(),
            'created_at': time.strftime('%Y-%m-%d %H:%M', time.localtime(o.created_at)),
            'coin_from': ci_from.coin_name(),
            'coin_to': ci_to.coin_name(),
            'amount_from': ci_from.format_amount(o.amount_from),
            'amount_to': ci_to.format_amount((o.amount_from * o.rate) // ci_from.COIN()),
            'rate': ci_to.format_amount(o.rate)
        })

    return bytes(json.dumps(rv), 'UTF-8')


def js_sentoffers(self, url_split, post_string):
    return self.js_offers(url_split, post_string, True)


def js_bids(self, url_split, post_string):
    swap_client = self.server.swap_client
    if len(url_split) > 3:
        if url_split[3] == 'new':
            if post_string == '':
                raise ValueError('No post data')
            post_data = urllib.parse.parse_qs(post_string)

            offer_id = bytes.fromhex(post_data[b'offer_id'][0].decode('utf-8'))
            assert(len(offer_id) == 28)

            amount_from = inputAmount(post_data[b'amount_from'][0].decode('utf-8'))

            addr_from = None
            if b'addr_from' in post_data:
                addr_from = post_data[b'addr_from'][0].decode('utf-8')
                if addr_from == '-1':
                    addr_from = None

            bid_id = swap_client.postBid(offer_id, amount_from, addr_send_from=addr_from).hex()

            rv = {'bid_id': bid_id}
            return bytes(json.dumps(rv), 'UTF-8')

        bid_id = bytes.fromhex(url_split[3])
        assert(len(bid_id) == 28)

        if post_string != '':
            post_data = urllib.parse.parse_qs(post_string)
            if b'accept' in post_data:
                swap_client.acceptBid(bid_id)

        bid, offer = swap_client.getBidAndOffer(bid_id)
        assert(bid), 'Unknown bid ID'

        edit_bid = False
        show_txns = False
        data = describeBid(swap_client, bid, offer, edit_bid, show_txns)

        return bytes(json.dumps(data), 'UTF-8')

    bids = swap_client.listBids()
    return bytes(json.dumps([{
        'bid_id': b[1].hex(),
        'offer_id': b[2].hex(),
        'created_at': time.strftime('%Y-%m-%d %H:%M', time.localtime(b[0])),
        'amount_from': format8(b[3]),
        'bid_state': strBidState(b[4])
    } for b in bids]), 'UTF-8')


def js_sentbids(self, url_split, post_string):
    return bytes(json.dumps(self.server.swap_client.listBids(sent=True)), 'UTF-8')


def js_index(self, url_split, post_string):
    return bytes(json.dumps(self.server.swap_client.getSummary()), 'UTF-8')