# Convert all of the following country data in to a Hash, like that of Angola

# Angola
angola = {
  "id" => "AGO",
  "name" => "Angola",
  "population" => 21_471_618,
  "capital" => "Luanda",
  "latitude" => -8.81155,
  "longitude" => 13.242,
  "income_level" => "Upper Middle",
  "high_income" => false
}

# Antigua and Barbuda
# id: "ATG"
# name: "Antigua and Barbuda"
# population: 89_985
# capital: "Saint John's"
# latitude: 17.1175
# longitude: -61.8456
# income_level: "High"
# high_income: true
antigua_and_barbuda = {
  "id" => "ATG",
  "name" => "Antigua and Barbuda",
  "population" => 89_985,
  "capital" => "Saint John's",
  "latitude" => 17.1175,
  "longitude" => -61.8456,
  "income_level" => "High",
  "high_income" => true
}


# Belarus
# id: "BLR"
# name: "Belarus"
# population: 9_466_000
# capital: "Minsk"
# latitude: 53.9678
# longitude: 27.5766
# income_level: "Upper Middle"
# high_income: false
belarus = {
  "id" => "BLR",
  "name" => "Belarus",
  "population" => 9_466_000,
  "capital" => "Minsk",
  "latitude" => 53.9678,
  "longitude" => 27.5766,
  "income_level" => "Upper Middle",
  "high_income" => false
}

# Central African Republic
# id: "CAF"
# name: "Central African Republic"
# population: 4_616_417
# capital: "Bangui"
# latitude: 5.63056
# longitude: 21.6407
# income_level: "Low"
# high_income: false
central_african_republic = {
  "id" => "CAF",
  "name" => "Central African Republic",
  "population" => 4_616_417,
  "capital" => "Bangui",
  "latitude" => 5.63056,
  "longitude" => 21.6407,
  "income_level" => "Low",
  "high_income" => false
}


# Switzerland
# id: "CHE"
# name: "Switzerland"
# population: 8_081_482
# capital: "Bern"
# latitude: 46.948
# longitude: 7.44821
# income_level: "High"
# high_income: true
switzerland = {
  "id" => "CHE",
  "name" => "Switzerland",
  "population" => 8_081_482,
  "capital" => "Bern",
  "latitude" => 46.948,
  "longitude" => 7.44821,
  "income_level" => "High",
  "high_income" => true
}


# Output Angola
puts angola

# Output each key/value pair for Angola
angola.each_pair { |key, value| puts "#{key},#{value}" }

# Output each key/value pair for Switzerland
switzerland.each_pair{|k,v|puts"#{k},#{v}"}

# Output each key/value pair for Belarus
belarus.each_pair do |key, value|
  puts "#{key},#{value}"
end

# a list of countries
countries = [
  angola,
  switzerland,
  belarus,
  antigua_and_barbuda,
  central_african_republic
]

# loop through each country in the list
countries.each_with_index do |country, index|
  puts "#{country["name"]} at index #{index}"
  puts "---"

  # for each country (Hash), loop through each key and value
  country.each_pair do |key, value|
    puts "#{key},#{value}"
  end
end

puts "---"
puts "CSV"
puts "---"

# Super neat CSV / Spreadsheet example!!!
headers = countries.first.keys
puts %("#{headers.join("\",\"")}")

countries.each do |country|
  puts %("#{country.values.join("\",\"")}")
end


headers = countries.first.keys.map { |key| %("#{key}") }.join(",")
puts headers

countries.each do |country|
  values = country.values.map do |value|
    %("#{value}")
  end
  puts values.join(",")
end