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local ls = require("luasnip")

local snippet_from_nodes = ls.sn
local c = ls.choice_node
local t = ls.text_node
local d = ls.dynamic_node
local f = ls.function_node
local i = ls.insert_node
local fmt = require("luasnip.extras.fmt").fmt


function string.starts(String,Start)
   return string.sub(String,1,string.len(Start))==Start
end

local newline = function(text)
  return t { "", text }
end

local visibility = function (position, default)
    local possibles = {'private', 'public'}
    local options = {}

    for _, value in pairs(possibles) do
        if value == default then
            table.insert(options, 1, t(value))
        else
            table.insert(options, t(value))
        end
    end

    return c(position, options)
end

local namespace = function ()
    local dir = vim.fn.expand('%:h')
    local autoloads = vim.call('composer#query', 'autoload.psr-4')
    if autoloads == nil then
        return (dir:gsub("^%l", string.upper))
    end

    local globalNamespace
    for key, value in pairs(autoloads) do
        if string.starts(dir, value:sub(1, -2)) then
            globalNamespace = key:sub(1, -2);
            dir = dir:sub(#key + 1)
            break
        end
    end
    dir = dir:gsub("/", "\\")

    return string.format("%s\\%s",globalNamespace, dir )
end

local class_name = function ()
    local filename = vim.fn.expand('%:t:r')
    return filename
end
local M = {
    v = fmt(
[[
/**
 * @var {}
 */
{} ${};
]], {
            i(1, "type"),
            d(2, visibility, {}, "private"),
            i(3, "var")
        }),
    class = fmt(
[[
<?php

declare(strict_types=1);

namespace {};

class {}
{{
    {}
}}
]],
    {
        f(namespace),
        f(class_name),
        i(0),
    }),

    pro = fmt(
        [[{} {} ${},]],
        {
            visibility(1, "private"),
            i(2, 'Type'),
            f( function (args)
                return args[1][1]:gsub("^%u", string.lower)
            end, {2}),
        }
    ),

    _c = fmt(
[[{} function __construct({}) {{
    {}
}}]],
        {
            visibility(1, "public"),
            i(2),
            i(0)
        }
    ),

    _p = fmt(
[[{} function __construct(
    {}
) {{
}}]],
        {
            visibility(1, "public"),
            i(2),
        }
    ),

    fn = {
        visibility(1, "public"),
        t(" function "),
        i(2, "name"),
        t("("),
        i(3, "$arg"),
        t(")"),
        c(4, {
            t(""),
            snippet_from_nodes(nil, {
                t(': '),
                i(1, "void"),
            }),
        }),
        newline "{",
        newline "\t",
        i(0, ""),
        newline "}",
    },

    strict = t "declare(strict_types=1);",
}

return M