local parser = require 'parser'
local matcher = require 'matcher'

rawset(_G, 'TEST', true)

function TEST(script)
    return function (expect)
        local start  = script:find('<?', 1, true)
        local finish = script:find('?>', 1, true)
        local pos = (start + finish) // 2 + 1
        local new_script = script:gsub('<[!?]', '  '):gsub('[!?]>', '  ')
        local ast = parser:ast(new_script)
        local vm = matcher.vm(ast)
        assert(vm)
        local result = matcher.hover(vm, pos)
        assert(result)
        expect = expect:gsub('^[\r\n]*(.-)[\r\n]*$', '%1'):gsub('\r\n', '\n')
        result = result:gsub('```lua[\r\n]*', ''):gsub('[\r\n]*```', ''):gsub('^[\r\n]*(.-)[\r\n]*$', '%1'):gsub('\r\n', '\n')
        assert(expect == result)
    end
end

TEST [[
local function <?x?>(a, b)
end
]]
"function x(a: any, b: any)"

TEST [[
local function x(a, b)
end
<?x?>()
]]
"function x(a: any, b: any)"

TEST [[
local mt = {}
mt.__index = mt

function mt:init(a, b, c)
    return {}
end

local obj = setmetatable({}, mt)

obj:<?init?>(1, '测试')
]]
[[
function mt:init(a: number, b: string, c: any)
  -> table
]]

TEST [[
local mt = {}
mt.__index = mt

function mt:init(a, b, c)
    return {}
end

local obj = setmetatable({}, mt)

obj:init(1, '测试')
obj.<?init?>(obj, 1, '测试')
]]
[[
function mt.init(self: table, a: number, b: string, c: any)
  -> table
]]

TEST [[
function obj.xxx()
end

obj.<?xxx?>()
]]
"function obj.xxx()"

TEST [[
obj.<?xxx?>()
]]
"function obj.xxx()"

TEST [[
local <?x?> = 1
]]
"number x = 1"

TEST [[
<?x?> = 1
]]
"number x = 1"

TEST [[
local t = {}
t.<?x?> = 1
]]
"number t.x = 1"

TEST [[
t = {}
t.<?x?> = 1
]]
"number t.x = 1"

TEST [[
local mt = {}
mt.__name = 'class'

local <?obj?> = setmetatable({}, mt)
]]
"*class obj"

TEST [[
local mt = {}
mt.name = 'class'
mt.__index = mt

local <?obj?> = setmetatable({}, mt)
]]
"*class obj"

TEST [[
local mt = {}
mt.TYPE = 'class'
mt.__index = mt

local <?obj?> = setmetatable({}, mt)
]]
"*class obj"

TEST [[
local mt = {}
mt.Class = 'class'
mt.__index = mt

local <?obj?> = setmetatable({}, mt)
]]
"*class obj"

TEST[[
local fs = require 'bee.filesystem'
local <?root?> = fs.current_path()
]]
"*bee::filesystem root"

TEST[[
('xx'):<?yy?>()
]]
"function *string:yy()"

TEST [[
local <?v?> = collectgarbage()
]]
"any v"

TEST [[
local type
w2l:get_default()[<?type?>]
]]
"any type"

TEST [[
<?load?>()
]]
[=[
function load(chunk: string/function [, chunkname: string [, mode: string [, env: table]]])
  -> function, error_message: string
Loads a chunk.
mode: string
   | "b" -- Only binary chunks.
   | "t" -- Only text chunks.
  -> "bt" -- Both binary and text.
]=]

TEST [[
string.<?lower?>()
]]
[[
function string.lower(string)
  -> string
Returns a copy of this string with all uppercase letters changed to lowercase.
]]

TEST [[
local function x(a, ...)
end

<?x?>(1, 2, 3, 4, 5, 6, 7)
]]
[[
function x(a: number, ...)
]]