import json


class Component:
    def __init__(self):
        self.headers = []
        self.binaries = []
        return

    def add_headers(self, src, dest):
        for h in self.headers:
            if h['src'] == src and h['dest'] == dest:
                return

        headers = {}
        headers['src'] = src
        headers['dest'] = dest
        self.headers.append(headers)


    def add_binary(self, src, dest):
        for b in self.binaries:
            if b['src'] == src and b['dest'] == dest:
                return

        binary = {}
        binary['src']  = src
        binary['dest'] = dest
        self.binaries.append(binary)


    def serialise(self):
        data = {}
        if len(self.headers) > 0:
            data['headers'] = self.headers

        if len(self.binaries) > 0:
            data['binaries'] = self.binaries

        return data


    def deserialise(self, data):
        if 'headers' in data:
            self.headers = data['headers']
        if 'binaries' in data:
            self.binaries = data['binaries']


    def get_headers(self):
        return self.headers


    def get_binaries(self):
        return self.binaries


class Manifest:
    def __init__(self, path):
        self.path = path
        self.base = None
        self.components = {}

    def load(self):
            with open(self.path, 'r') as f:
                self.data = json.load(f)

            if 'components' in self.data:
                for n, t in self.data['components'].items():
                    component = Component()
                    component.deserialise(t)
                    self.components[n] = component

            if 'base' in self.data:
                self.base = self.data['base']


    def save(self):
            component_data = {}
            for n, t in self.components.items():
                d = t.serialise()
                component_data[n] = d

            self.data['components'] = component_data

            if self.base is not None:
                self.data['base'] = self.base

            with open(self.path, 'w') as f:
                json.dump(self.data, f, indent=4)


    def reset(self):
        self.data = {}


    def get_component(self, name):
        if name in self.components:
            return self.components[name]

        component = Component()
        self.components[name] = component
        return component


    def set_base(self, path):
        self.base = path


    def get_base(self):
        return self.base


    def get_all_components(self):
        return self.components