local status, telescope = pcall(require, "telescope")
if (not status) then return end
local builtin = require("telescope.builtin")

local previewers = require('telescope.previewers')
local Job = require('plenary.job')
local new_maker = function(filepath, bufnr, opts)
    filepath = vim.fn.expand(filepath)
    Job:new({
        command = 'file',
        args = { '--mime-type', '-b', filepath },
        on_exit = function(j)
            local mime_type = vim.split(j:result()[1], '/')[1]
            if mime_type == "text" then
                previewers.buffer_previewer_maker(filepath, bufnr, opts)
            else
                -- maybe we want to write something to the buffer here
                vim.schedule(function()
                    vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { 'BINARY' })
                end)
            end
        end
    }):sync()
end

local fb_actions = require "telescope".extensions.file_browser.actions
local function telescope_buffer_dir()
  return vim.fn.expand('%:p:h')
end

telescope.setup {
    defaults = {
        buffer_previewer_maker = new_maker,
        file_ignore_patterns = { "**/*.pdf" },
        mappings = {
            n = {
                ['<c-d>'] = require('telescope.actions').delete_buffer
            }, -- n
            i = {
                ['<c-d>'] = require('telescope.actions').delete_buffer
            },
        },
    },
    extensions = {
        fzf = {
            fuzzy = true, -- false will only do exact matching
            override_generic_sorter = true, -- override the generic sorter
            override_file_sorter = true, -- override the file sorter
            case_mode = "smart_case", -- or "ignore_case" or "respect_case"
            -- the default case_mode is "smart_case"
        },
        file_browser = {
            theme = "dropdown",
            -- disables netrw and use telescope-file-browser in its place
            hijack_netrw = true,
            mappings = {
                ["n"] = {
                    -- your custom normal mode mappings
                    ["h"] = fb_actions.goto_parent_dir,
                },
            },
        },
    }
}

telescope.load_extension('fzf')
telescope.load_extension('file_browser')


-- keymaps
vim.keymap.set('n', '<leader>e',
    function()
        builtin.find_files({
        })
    end)
vim.keymap.set('n', '<leader>g', function()
    builtin.live_grep()
end)
vim.keymap.set('n', '<leader>b', function()
    builtin.buffers()
end)
vim.keymap.set('n', '<leader>h', function()
    builtin.resume()
end)
-- vim.keymap.set('n', '<leader>d', function()
--     builtin.diagnostics()
-- end)
vim.keymap.set("n", "<leader>fb", function()
  telescope.extensions.file_browser.file_browser({
    path = "%:p:h",
    cwd = telescope_buffer_dir(),
    respect_gitignore = false,
    hidden = true,
    grouped = true,
    previewer = false,
    initial_mode = "normal",
    layout_config = { height = 40 }
  })
end)