local config = require("config")
config.db = "data/unittest.db"
local mock = {}
local env = {}
mock.env = env
--Mirror print prior to lua 5.4
--local oldprint = print
local ntostring
print_table= function(...)
	print("Print called")
	local args = {...}
	local mapped_args = {}
	for k,v in ipairs(args) do
		print("mapping",v)
		mapped_args[k] = ntostring(v)
	end
	print(table.concat(mapped_args,"\t"))
end

local tables_called = {}
function ntostring(arg)
	io.stdout:write("Calling tostring with:",tostring(arg),"\n")
	if type(arg) ~= "table" then
		return tostring(arg)
	end
	local function tbl_to_string(tbl,indent)
		if tables_called[tbl] then
			return tostring(tbl)
		end
		tables_called[tbl] = true
		if type(tbl) ~= "table" then
			error("tbl_to_string must be called with a table, got a " .. type(tbl))
		end
		local lines = {string.rep("\t",indent) .. "{"}
		for k, v in pairs(tbl) do
			local kv = {}
			for i,n in pairs{k,v} do
				if type(n) == "table" then
					kv[i] = string.format("%q",tbl_to_string(n,indent+1))
				else
					kv[i] = string.format("%q",tostring(n))
				end
			end
			table.insert(
				lines,
				string.rep("\t",indent+1) .. kv[1] .. ":" .. kv[2]
			)
		end
		table.insert(lines,string.rep("\t",indent) .. "}")
		return table.concat(lines,"\n")
	end
	--It's a table
	local ret = tbl_to_string(arg,0)
	tables_called = {}
	return ret
end

local smr_mock_env = {
	--An empty function that gets called to set up databases and do other
	--startup-time stuff, runs once for each worker process.
	configure = spy.new(function(...) end),
	http_request_get_host = spy.new(function(req) return req.host or "test.host" end),
	http_request_get_path = spy.new(function(req) return req.path or "/" end),
	http_request_populate_qs = spy.new(function(req) req.qs_populated = true end),
	http_request_populate_post = spy.new(function(req) req.post_populated = true end),
	http_populate_multipart_form = spy.new(function(req) req.post_populated = true end),
	http_argument_get_string = spy.new(function(req,str)
		assert(req.args,"requests should have a .args table")
		assert(
			req.method == "GET" and req.qs_populated or
			req.method == "POST" and req.post_populated,[[
			http_argument_get_string() can only be called after
			the appropriate populate method has been called, either
			http_request_populate_qs(req) or
			http_request_populate_post(req)]]
		)
		return req.args[str]
	end),
	http_file_get = spy.new(function(req,filename)
		assert(req.multipart_forum_populated,[[
			http_file_get() can only be called after the approriate
			populate method has been called. (http_populate_multipart_form())
		]])
		return req.file["pass"]
	end),
	http_response = spy.new(function(req,errcode,html)
		req.responsecode = errcode
		req.response = html
	end),
	http_response_header = spy.new(function(req,name,value)
		req.response_headers = req.response_headers or {}
		req.response_headers[name] = value
	end),
	http_method_text = spy.new(function(req) return req.method end),
	http_populate_cookies = spy.new(function(req)
		req.cookies_populated = true
		req.cookies = req.cookies or {}
	end),
	http_request_cookie = spy.new(function(req,cookie_name)
		assert(req.cookies_populated,[[
			http_request_cookie() can only be called after
			http_populate_cookies() has been called.
		]])
		return req.cookies[cookie_name]
	end),
	http_response_cookie = spy.new(function(req,name,value) req.cookies = {[name] = value} end),
	log = spy.new(function(priority, message) end),
	sha3 = spy.new(function(message) return "digest" end),
}

local smr_mock_env_m = {
	__index = smr_mock_env,
	__newindex = function(self,key,value)
		local setter = debug.getinfo(2)
		if setter.source ~= "=[C]" and key ~= "configure" then
			error(string.format(
				"Tried to create a global %q with value %s\n%s",
				key,
				tostring(value),
				debug.traceback()
			),2)
		else
			rawset(self,key,value)
		end
	end
}

local sfmt = string.format
local string_fmt_override = {
	format = spy.new(function(fmt,...)
		local args = {...}
		for i = 1,#args do
			if args[i] == nil then
				args[i] = "nil"
			end
		end
		table.insert(args,1,fmt)
		return sfmt(unpack(args))
	end)
}
setmetatable(string_fmt_override,{__index = string})
local smr_override_env = {
	--Detour assert so we don't actually perform any checks
	assert = spy.new(function(bool,msg,level) return bool end),
	--Allow string.format to accept nil as arguments
	string = string_fmt_override
}

mock.olds = {}

function mock.setup()
	setmetatable(_G,smr_mock_env_m)
	for k,v in pairs(smr_override_env) do
		mock.olds[k] = _G[k]
		_G[k] = v
	end
end

function mock.mockdb()
	local config = require("config")
	config.db = "data/unittest.db"
	assert(os.execute("rm " .. config.db))
	local db = require("db")
end

function mock.teardown()
	setmetatable(_G,{})
	for k,v in pairs(mock.olds) do
		_G[k] = v
	end
end

local session_m = {__index = {
	login = function(self, who, pass)
		if not self.args then
			error("Request should have a .args table")
		end
		print("Right before requireing login_post endpoint, self.args is " .. tostring(self.args))
		print("After requireing login_post edpoint, self.args is " .. tostring(self.args))
		self.args.user = who
		self.args.pass = pass
		post_login(self)
		error("TODO")
	end,
	logout = function(self)
		error("TODO")
	end,
	req = function(self, args)
		
	end
}}

function mock.session(tbl)
	if not post_login_required then
		post_login = require("endpoints.login_post")
		post_login_required = true
	end
	tbl = tbl or {}
	tbl.args = tbl.args or {}
	local req = tbl or {
		host = "test.host",
	}
	return setmetatable(req,session_m)
end

return mock