local utils = require("utils")

local oil = nil
local oil_window = nil
local oil_prev_path = nil

local function toggle_oil_window()
    assert(oil, "Oil is not loaded")

    if oil_window and vim.api.nvim_win_is_valid(oil_window) then
        local bufnr = vim.api.nvim_win_get_buf(oil_window)
        oil_prev_path = oil.get_current_dir(bufnr)

        vim.api.nvim_win_close(oil_window, true)
        oil_window = nil
        return
    end

    local term_width = vim.api.nvim_get_option("columns")
    local width_percentage = 0.1575
    local min_width = 30
    local max_width = 50
    local width = utils.calculate_split_size(term_width, width_percentage, min_width, max_width)

    vim.cmd("topleft vertical " .. width .. "vnew")
    oil_window = vim.api.nvim_get_current_win()
    vim.api.nvim_win_set_option(oil_window, "winfixwidth", true)
    vim.api.nvim_win_set_option(oil_window, "winhighlight", "Normal:EdgeTool,FloatBorder:EdgeTool")

    oil.open(oil_prev_path)
    utils.lock_buf_to_window(oil_window, vim.api.nvim_get_current_buf(), "oil")
end

return {
    "stevearc/oil.nvim",
    event = "VeryLazy",
    lazy = true,
    config = function()
        oil = require("oil")
        oil.setup({
            view_options = {
                show_hidden = true,
            },
            win_options = {
                wrap = true,
                signcolumn = "no",
                cursorcolumn = false,
                foldcolumn = "0",
                spell = false,
                list = false,
                conceallevel = 3,
                concealcursor = "nvic",
            },
            watch_for_changes = true,
        })

        local wm = require("window_management")
        utils.add_keymaps({
            n = {
                ["<leader>o"] = {
                    cmd = function()
                        toggle_oil_window()
                        wm.autosize_windows()
                    end,
                }
            }
        })
    end,
}