import json
import datetime

# Load JSON data from a file
def load_json(file_path):
    with open(file_path, 'r', encoding='utf-8') as json_file:
        return json.load(json_file)


def get_list_of_last_names(data):
    processed_data = []
    for item in data:
        name_split = item.get('Name').split(" ")
        name_split_len = len(name_split)
        name = name_split[-1]
        if name not in processed_data and name_split_len > 1:
            processed_data.append(name)
    
    processed_data.sort()
    return processed_data

def get_people_by_lastname(data, lastname):
    processed_data = []
    for item in data:
        name_split = item.get('Name').split(" ")
        last_name = name_split[-1]
        name_split_len = len(name_split)

        if name_split_len == 1 and lastname == '[empty]':
            processed_data.append(item)

        if last_name == lastname:
            processed_data.append(item)
    
    return processed_data

def generate_html(data, output_file):
    last_names = get_list_of_last_names(data)

    # last_names.insert(0, '[empty]')

    html_content = ''
    for lastname in last_names:
        html_content += '<h2>'+ lastname +'</h2>'
        people = get_people_by_lastname(data, lastname)
        for person in people:
            name_split = person.get('Name').split(" ")
            first_and_middle_names = " ".join(name_split[:-1])
            last_name = name_split[-1]

            birthdate = datetime.datetime.strptime(person.get('Birthday'), "%Y-%m-%dT%H:%M:%S")
            dieddate = datetime.datetime.strptime(person.get('DiedDay'), "%Y-%m-%dT%H:%M:%S")

            if birthdate.year == 1 and dieddate.year == 1:
                html_content += '<p><a href="people/'+str(person.get('Id'))+'.html">' + last_name + ', ' + first_and_middle_names + '</a></p>'
            else:
                html_content += '<p><a href="people/'+str(person.get('Id'))+'.html">' + last_name + ', ' + first_and_middle_names + '</a> (' + (str(birthdate.year) if birthdate.year != 1 else '?') + ' - ' + (str(dieddate.year) if dieddate.year != 1 else '?') + ')</p>'

    html_content += '<br><p>This list contains ' + str(len(data)) + ' people</p>'
    html_content += '<p>Last updated ' + datetime.datetime.now().strftime('%d-%m-%Y') + '</p>'

    html_template = ''
    with open('templates/names_template.html', 'r') as file:
        html_template = file.read()

    html_template = html_template.replace('{{NAME_LIST}}', html_content)

    # Write the HTML content to a file
    with open(output_file, 'w', encoding='utf-8') as f:
        f.write(html_template)

def main():
    json_file_path = 'list.json'
    output_html_file = 'names.html'
    
    # Load JSON data directly into an array
    json_data = load_json(json_file_path)
    
    # Generate HTML from the loaded data
    generate_html(json_data, output_html_file)

if __name__ == '__main__':
    main()