#!/usr/bin/env python3

import os
import time
import requests
import json

LAYER_API_URL = "https://layers.openembedded.org/layerindex/api/layers/?filter=yp_compatible_version__isnull:false&format=json"
LAYERDATA = "layerdata.json"
RELEASE_URL = "https://docs.yoctoproject.org/releases.json"
RELEASEDATA = "releasedata.json"

def fetch_data(url, file_path, cache):
    if os.path.isfile(file_path):
        modification_time = os.path.getmtime(file_path)
        time_difference = time.time() - modification_time
    else:
        time_difference = 1000000
    
    # Re-download if the time difference is greater than cache value
    if time_difference > cache:
        response = requests.get(url)
        if response.status_code == 200:
            with open(file_path, 'w') as file:
                file.write(response.text)
            return json.loads(response.text)
    else:
        with open(file_path, 'r') as file:
            return json.load(file)

layers = fetch_data(LAYER_API_URL, LAYERDATA, 600)
releases = fetch_data(RELEASE_URL, RELEASEDATA, 600)

# grab the recent release branches and add master, so we can ignore old branches
active_releases = [e['release_codename'].lower() for e in releases if e['series'] !='full']
active_releases.append('master')
active_releases.append('main')

header = dict()
header['layer'] = 'Layer'
header['branches'] = "Branches"
header['desc'] = "Description"
header['maintainers'] = ["Maintainer(s)"]
header['url'] = "Source Code"
parsed_layers = {'header': header}

for layer in layers:
    name = layer['layer']['name']
    if layer['branch']['name'] not in active_releases:
        continue
    if name in parsed_layers:
        parsed_layers[name]['branches'] += ", " + layer['branch']['name']
        output['maintainers'].union(set([e['name'] for e in layer['maintainers']]))
    else:
        output = dict()
        output['layer'] = name
        output['branches'] = layer['branch']['name']
        if len(layer['layer']['description']) > 80:
            output['desc'] = layer['layer']['summary']
        else:
            output['desc'] = layer['layer']['description']
        output['maintainers'] = set([e['name'] for e in layer['maintainers']])
        output['url'] = '<a href="{u}">{u}</a>'.format(u=layer['layer']['vcs_web_url'])
        parsed_layers[name] = output

# Convert the lists of maintainers to a pretty string
for layer in parsed_layers:
    maintainers = list(parsed_layers[layer]['maintainers'])
    if len(maintainers) == 1:
        parsed_layers[layer]['maintainers'] = maintainers.pop()
    else:
        print(maintainers)
        parsed_layers[layer]['maintainers'] = '{} and {}'.format(', '.join(maintainers[:-1]), maintainers[-1])

with open('parsed-layers.json', 'w') as file:
    json.dump(parsed_layers, file)