#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright © 2017-2019 Xavier G. <xavier.boobank@kindwolf.org>
# This work is free. You can redistribute it and/or modify it under the
# terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See the COPYING file for more details.
"""
boobank-history takes a JSON file, as created by boobank-cacher when running
and caching a "boobank history" command, and display its contents.
"""

import time
import argparse
from prettytable import PrettyTable
from termcolor import colored
from boobank_utils import format_amount, load_json, format_timestamp_colored
from boobank_utils import MAX_AGE, DEFAULT_CURRENCY, COLORING_SIMPLE

def parse_args():
    """
    Parse command-line arguments.
    """
    description = 'Display the contents of a cached "boobank history" JSON file.'
    args_parser = argparse.ArgumentParser(description=description)
    args_parser.add_argument('json_file', nargs='?', default='-', help='JSON file to display')
    args_parser.add_argument('-c', '--count', default=None, type=int,
                             help='Maximum number of operations to display.')
    return args_parser.parse_args()

def main():
    """
    Main function.
    """
    args = parse_args()
    filepath = args.json_file
    max_operations = args.count
    history = load_json(filepath)
    timestamp = history.get('timestamp', time.time())
    table = get_table(timestamp)
    i = 0
    for operation in history.get('data', []):
        add_operation(table, operation)
        i += 1
        if max_operations and i == max_operations:
            break
    print(table)

def get_table(timestamp):
    """
    Create and return the PrettyTable instance used to display data.
    """
    ptable = PrettyTable()
    field_names = ['Date', 'Label', 'Amount']
    field_names = [colored(x, 'white', attrs=['bold']) for x in field_names]
    timestamp = format_timestamp_colored(timestamp, MAX_AGE)
    field_names[1] += ' -- data cached on %s' % timestamp
    ptable.field_names = field_names
    ptable.align = 'l'
    ptable.align[ptable.field_names[2]] = 'r'
    return ptable

def add_operation(table, operation):
    """
    Add the given bank operation to the given PrettyTable instance.
    """
    date = colored(operation.get('date'), 'cyan')
    label = colored(operation.get('label')[:80], 'cyan')
    currency = operation.get('currency', DEFAULT_CURRENCY)
    amount = format_amount(float(operation['amount']), currency, COLORING_SIMPLE)
    table.add_row([date, label, amount])

if __name__ == '__main__':
    main()