local cmp = require("cmp")
local cmp_lsp = require("cmp_nvim_lsp")

local M = {}

M.capabilities = vim.tbl_deep_extend(
    "force",
    {},
    vim.lsp.protocol.make_client_capabilities(),
    cmp_lsp.default_capabilities()
)

local cmp_kinds = {
    Text = '  ',
    Method = '  ',
    Function = '  ',
    Constructor = '  ',
    Field = '  ',
    Variable = '  ',
    Class = '  ',
    Interface = '  ',
    Module = '  ',
    Property = '  ',
    Unit = '  ',
    Value = '  ',
    Enum = '  ',
    Keyword = '  ',
    Snippet = '  ',
    Color = '  ',
    File = '  ',
    Reference = '  ',
    Folder = '  ',
    EnumMember = '  ',
    Constant = '  ',
    Struct = '  ',
    Event = '  ',
    Operator = '  ',
    TypeParameter = '  '
}

cmp.setup {
    formatting = {
        fields = {'kind', 'abbr'},
        format = function(entry, vim_item)
            vim_item.kind = cmp_kinds[vim_item.kind] or ''
            if entry.completion_item.detail then
                vim_item.menu = entry.completion_item.detail
            end
            return vim_item
        end
    },
    completion = {completeopt = "menu,menuone"},
    snippet = {
        expand = function(args) require("luasnip").lsp_expand(args.body) end
    },
    mapping = { -- change later zach is ????
        ["<C-d>"] = cmp.mapping.scroll_docs(-4),
        ["<C-f>"] = cmp.mapping.scroll_docs(4),
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<C-e>"] = cmp.mapping.close(),
        ["<CR>"] = cmp.mapping.confirm {
            behavior = cmp.ConfirmBehavior.Insert,
            select = true
        },
        ["<Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif require("luasnip").expand_or_jumpable() then
                require("luasnip").expand_or_jump()
            else
                fallback()
            end
        end, {"i", "s"}),
        ["<S-Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_prev_item()
            elseif require("luasnip").jumpable(-1) then
                require("luasnip").jump(-1)
            else
                fallback()
            end
        end, {"i", "s"})
    },

    sources = cmp.config.sources({
        {name = "path"}, {name = "nvim_lsp"}, {name = "luasnip"}, -- snip snip
        {name = "buffer"}, {name = "nvim_lua"}
    })
}

return M