# Introduction to Programming, 27.11.2023
print("Welcome!")

# CREATE A NEW TEXTFILE, weekdays.txt, contents:
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

# NEW FILE

# open a file: weekdays.txt, r-mode => read
file_handle = open("weekdays.txt", "r")

# read the contents of a file into a variable
contents = file_handle.read()
file_handle.close()

# print the contents
print(contents)

# NEW FILE

# open a file: weekdays.txt, r-mode => read
file_handle = open("weekdays.txt", "r")

counter = 1

# read line by line
while True:
    # we might get some weird numbering
    # issues because of all the newlines
    line = file_handle.readline()
    print(f"{counter}. {line}")

    counter = counter + 1

    # if we reach the end of the file
    # => break out of loop
    if not line:
        break

file_handle.close()

# NEW FILE

# open a file: weekdays.txt, r-mode => read
file_handle = open("weekdays.txt", "r")

# read data as usual and use split()
# to make a list of the data
content = file_handle.read()
file_handle.close()

# this is now a plain Python list,
# we can use any method we learnt
# earlier in the course
lines = content.split("\n")

# get amount of lines in list
amount = len(lines)

# loop through weekdays
# with a row number
for index in range(amount):
    line = lines[index]
    print(f"{index + 1}. {line}")

# NEW FILE

# open a file: mynotes.txt, w-mode => write
# write completely replaces the file content
# if something is saved into the file
file_handle = open("mynotes.txt", "w", encoding="utf-8")

# ask text from user
message = input("Write your message:\n")

# write data into the file
file_handle.write(message)
file_handle.close()

# NEW FILE

# open a file: mynotes.txt, a-mode => append
# append places the new data into the end
# of the previous data
file_handle = open("mynotes.txt", "a", encoding="utf-8")

# ask text from user
message = input("Write your message:\n")

# write new data into the file
# let's add a new line to add the data
# into separate lines in the file
file_handle.write(message + "\n")
file_handle.close()

# NEW TEXT FILE: app_data.json, contents:

{
    "name": "Rovaniemi",
    "population": 62933,
    "county": "Lapland"
}

# NEW FILE

import var_dump as vd
import json

# open a file: app_data.json, r-mode => read
file_handle = open("app_data.json", "r")
content = file_handle.read()
file_handle.close()

# convert JSON (which is text) to Python data
city = json.loads(content)

print(city['name'])
print(city['population'])

# vd.var_dump(content)
# print()
# vd.var_dump(city)

# NEW FILE

import json

# test data in Python format
phone = {
    "name": "Nokia 3310",
    "release_year": 2000,
    "battery": "1200mAh",
    "camera": False,
    "weight": 133
}

# convert Python data => JSON format (which is text)
content = json.dumps(phone)

# open a file and save the JSON into it
file_handle = open("myphone.json", "w")
file_handle.write(content)
file_handle.close()

print("Thank you for adding your phone!")

# NEW TEXT FILE: cities.json , contents:

[
   {
   "name": "Finland",
   "population": 5536146,
   "capital": "Helsinki"
   },
   {
   "name": "Sweden",
   "population": 10402070,
   "capital": "Stockholm"
   },
   {
   "name": "France",
   "population": 67413000,
   "capital": "Paris"
   }
]

# NEW FILE

import json

# open a file: cities.json, r-mode => read
file_handle = open("cities.json", "r")
content = file_handle.read()
file_handle.close()

# convert JSON (which is text) to Python data
# this file is a list of dictionaries
cities = json.loads(content)

# cities is a list, for-loop =>
for city in cities:
    print(city['name'])
    print(city['population'])
    print()

# NEW TEXT FILE : americancities.json, contents:

[
   {
   "name": "Los Angeles",
   "population": 3898747,
   "state": "California"
   },
   {
   "name": "Miami",
   "population": 6166488,
   "state": "Florida"
   },
   {
   "name": "Denver",
   "population": 715522,
   "state": "Colorado"
   }
]

# NEW FILE

import json


# PART 1: Read original data from a file
# open a file: app_data.json, r-mode => read
file_handle = open("americancities.json", "r")
content = file_handle.read()
file_handle.close()

# convert JSON (which is text) to Python data
cities = json.loads(content)

# loop through the cities and print out
# details of each city
for city in cities:
    print(city['name'])
    print(city['state'])
    print(city['population'])
    print()


# PART 2 : Ask the user for the new city
# and build the data

city_name = input("New city, name:\n")
city_population = input("New city, population:\n")
city_population = int(city_population)
city_state = input("New city, state:\n")

# combine all variables to a new dictionary
new_city = {
    "name": city_name,
    "population": city_population,
    "state": city_state
}

# add the new city as a new city
# to the original list of cities
cities.append(new_city)

# PART 3: Save the new version of the data
# and replace the old version
raw_data = json.dumps(cities)

# save the new version to file
file_handle = open("americancities.json", "w")
file_handle.write(raw_data)
file_handle.close()

print("New city saved! Thank you!")