local http = require "socket.http";
local url = require "socket.url";

local couchapi = module:require("couchdb/couchapi");
local json = module:require("couchdb/json");

local couchdb_url = assert(module:get_option("couchdb_url"), "Option couchdb_url not specified");
local db = couchapi.db(couchdb_url);

local function couchdb_get(key)
	local a,b = db:doc(key):get()
	print(json.encode(a));
	if b == 404 then return nil; end
	if b == 200 then b = nil; end
	return a.payload,b;
end

local function couchdb_put(key, value)
	local a,b = db:doc(key):get();
	return db:doc(key):put({ payload = value, _rev = a and a._rev });
end

local st = require "util.stanza";

local handlers = {};

handlers.accounts = {
	get = function(self, user)
		return couchdb_get(self.host.."/"..user.."/account");
	end;
	set = function(self, user, data)
		return couchdb_put(self.host.."/"..user.."/account", data);
	end;
};
handlers.vcard = {
	get = function(self, user)
		return couchdb_get(self.host.."/"..user.."/vcard");
	end;
	set = function(self, user, data)
		return couchdb_put(self.host.."/"..user.."/vcard", data);
	end;
};
handlers.private = {
	get = function(self, user)
		return couchdb_get(self.host.."/"..user.."/private");
	end;
	set = function(self, user, data)
		return couchdb_put(self.host.."/"..user.."/private", data);
	end;
};
handlers.roster = {
	get = function(self, user)
		return couchdb_get(self.host.."/"..user.."/roster");
	end;
	set = function(self, user, data)
		return couchdb_put(self.host.."/"..user.."/roster", data);
	end;
};

-----------------------------
local driver = {};

function driver:open(datastore, typ)
	local handler = handlers[datastore];
	if not handler then return nil; end
	local host = module.host;
	--local cache_key = host.." "..datastore;
	--if self.ds_cache[cache_key] then return self.ds_cache[cache_key]; end
	local instance = setmetatable({ host = host, datastore = datastore }, { __index = handler });
	--for key,val in pairs(handler) do
	--	instance[key] = val;
	--end
	--if instance.init then instance:init(); end
	--self.ds_cache[cache_key] = instance;
	return instance;
end

module:provides("storage", driver);