local terminals = {}

local function toggle(name)
	return function()
		terminals[name]:toggle()
	end
end

return {
	"akinsho/toggleterm.nvim",
	version = "*",
	keys = {
		{ "<C-T>", "<cmd>ToggleTerm name=toggleterm<cr>", desc = "Toggle terminal" },
		{ "<leader>-", "<cmd>ToggleTerm direction=horizontal<cr>", desc = "Toggle horizontal terminal" },
		{ "<leader>|", "<cmd>ToggleTerm direction=vertical<cr>", desc = "Toggle vertical terminal" },
		{ "<leader>ob", toggle("btop"), desc = "Open btop" },
		{ "<leader>od", toggle("lazydocker"), desc = "Open Lazydocker" },
		{
			"<leader>oh",
			"<cmd>ToggleTerm direction=horizontal name=toggleterm-hori<cr>",
			desc = "Open horizontal terminal",
		},
		{ "<leader>oi", toggle("iotop"), desc = "Open iotop" },
		{ "<leader>on", toggle("rmpc"), desc = "Open rmpc" },
		{ "<leader>oN", toggle("nvtop"), desc = "Open nvtop" },
		{ "<leader>op", toggle("ipython"), desc = "Open IPython" },
		{ "<leader>oP", toggle("ipython-full"), desc = "Open full IPython" },
		{ "<leader>ot", "<cmd>ToggleTerm name=toggleterm<cr>", desc = "Open terminal" },
		{ "<leader>oT", "<cmd>ToggleTerm name=toggleterm-full direction=tab<cr>", desc = "Open full terminal" },
		{
			"<leader>ov",
			"<cmd>ToggleTerm direction=vertical name=toggleterm-vert<cr>",
			desc = "Open vertical terminal",
		},
		{ "<leader>tf", "<cmd>ToggleTerm name=toggleterm<cr>", desc = "Toggle terminal" },
		{
			"<leader>th",
			"<cmd>ToggleTerm direction=horizontal name=toggleterm-hori<cr>",
			desc = "Toggle horizontal terminal",
		},
		{ "<leader>ts", "<cmd>TermSelect<cr>", desc = "Select terminal" },
		{ "<leader>tt", "<cmd>ToggleTerm name=toggleterm<cr>", desc = "Toggle terminal" },
		{ "<leader>tT", "<cmd>ToggleTerm name=toggleterm-full direction=tab<cr>", desc = "Toggle full terminal" },
		{
			"<leader>tv",
			"<cmd>ToggleTerm direction=vertical name=toggleterm-vert<cr>",
			desc = "Toggle vertical terminal",
		},
	},
	opts = {
		-- size can be a number or function which is passed the current terminal
		size = function(term)
			if term.direction == "horizontal" then
				return 20
			elseif term.direction == "vertical" then
				return vim.o.columns * 0.45
			end
		end,
		-- on_create = fun(t: Terminal), -- function to run when the terminal is first created
		-- on_open = fun(t: Terminal), -- function to run when the terminal opens
		-- on_close = fun(t: Terminal), -- function to run when the terminal closes
		-- on_stdout = fun(t: Terminal, job: number, data: string[], name: string) -- callback for processing output on stdout
		-- on_stderr = fun(t: Terminal, job: number, data: string[], name: string) -- callback for processing output on stderr
		-- on_exit = fun(t: Terminal, job: number, exit_code: number, name: string) -- function to run when terminal process exits
		hide_numbers = true, -- hide the number column in toggleterm buffers
		-- shade_filetypes = {},
		autochdir = false, -- when neovim changes it current directory the terminal will change it's own when next it's opened
		highlights = {
			-- highlights which map to a highlight group name and a table of it's values
			-- NOTE: this is only a subset of values, any group placed here will be set for the terminal window split
			Normal = {
				guibg = "#24273A",
			},
			NormalFloat = {
				link = "Normal",
			},
			-- FloatBorder = {
			--   guifg = "<VALUE-HERE>",
			--   guibg = "<VALUE-HERE>",
			-- },
		},
		shade_terminals = false, -- NOTE: this option takes priority over highlights specified so if you specify Normal highlights you should set this to false
		-- shading_factor = '-10',   -- the percentage by which to lighten dark terminal background, default: -30
		-- shading_ratio = '-3',     -- the ratio of shading factor for light/dark terminal background, default: -3
		start_in_insert = true,
		insert_mappings = true, -- whether or not the open mapping applies in insert mode
		terminal_mappings = true, -- whether or not the open mapping applies in the opened terminals
		persist_size = false,
		persist_mode = true, -- if set to true (default) the previous terminal mode will be remembered
		-- direction = 'vertical' | 'horizontal' | 'tab' | 'float',
		direction = "float",
		-- close_on_exit = true, -- close the terminal window when the process exits
		-- clear_env = false, -- use only environmental variables from `env`, passed to jobstart()
		-- Change the default shell. Can be a string or a function returning a string
		shell = vim.o.shell,
		auto_scroll = true, -- automatically scroll to the bottom on terminal output
		-- This field is only relevant if direction is set to 'float'
		float_opts = {
			-- The border key is *almost* the same as 'nvim_open_win'
			-- see :h nvim_open_win for details on borders however
			-- the 'curved' border is a custom border type
			-- not natively supported but implemented in this plugin.
			-- border = 'single' | 'double' | 'shadow' | 'curved' | ... other options supported by win open
			border = "curved",
			-- like `size`, width, height, row, and col can be a number or function which is passed the current terminal
			width = function()
				return vim.o.columns - 35
			end,
			-- height = 75,
			-- row = <value>,
			-- col = vim.o.columns * 0.8,
			winblend = 3,
			zindex = 10,
			-- title_pos = 'left' | 'center' | 'right', position of the title of the floating window
			title_pos = "center",
		},
		winbar = {
			enabled = false,
			name_formatter = function(term) --  term: Terminal
				return term.name
			end,
		},
		responsiveness = {
			-- breakpoint in terms of `vim.o.columns` at which terminals will start to stack on top of each other
			-- instead of next to each other
			-- default = 0 which means the feature is turned off
			horizontal_breakpoint = 135,
		},
	},
	config = function(_, opts)
		require("toggleterm").setup(opts)
		local Terminal = require("toggleterm.terminal").Terminal

		local programs = {
			btop = { cmd = "/usr/bin/btop", display_name = "btop", direction = "tab", hidden = true },
			ipython = { cmd = "ipython", display_name = "ipython", direction = "vertical", hidden = true },
			["ipython-full"] = { cmd = "ipython", display_name = "ipython-full", direction = "tab", hidden = true },
			iotop = { cmd = "sudo iotop", display_name = "iotop", direction = "tab", hidden = true },
			lazydocker = { cmd = "lazydocker", display_name = "lazydocker", direction = "tab", hidden = true },
			nvtop = { cmd = "nvtop", display_name = "nvtop", direction = "tab", hidden = true },
			rmpc = { cmd = "rmpc", display_name = "rmpc", direction = "tab", hidden = true },
		}

		for name, program in pairs(programs) do
			program.on_stderr = function(_, job, data, process_name)
				vim.notify(
					("%s encountered an error on job %d\n%s"):format(process_name, job, table.concat(data, "\n")),
					vim.log.levels.ERROR
				)
			end
			terminals[name] = Terminal:new(program)
		end

		local terminal_keys = vim.api.nvim_create_augroup("TerminalKeys", { clear = true })
		vim.api.nvim_create_autocmd("TermOpen", {
			group = terminal_keys,
			pattern = "term://*",
			callback = function(args)
				vim.keymap.set("t", "<esc>", [[<C-\><C-n>]], { buffer = args.buf })
				vim.keymap.set("t", "<C-w>", [[<C-\><C-n><C-w>]], { buffer = args.buf })
			end,
		})
	end,
}