local dashboard = require("alpha.themes.dashboard")

-- 
--  header
--

local function section_fortune_lines()
	local fortune = vim.api.nvim_exec("silent !fortune", true)

	local tbl = {}
	local first = true
	for line in fortune:gmatch("[^\r\n]+") do
		if first then
			first = false
		else
			local entry = {
				type = "text",
				val = line,
				opts = { hl = "Number", position = "center" }
			}
			table.insert(tbl, entry)
		end
	end

	return { type = "group", val = tbl }
end



local section_fortune = {
	type = "group",
	val = {
		section_fortune_lines()
	}
}


--
--  sessions
--

local function section_sessions_entries()
	local session = require("session")

	local tbl = {}

	local s = session.list_sessions()
	local i = 1
	for _, v in pairs(s) do
		local item = v[1]
		local item_short = item:gsub(vim.env.HOME, "~")
		local item_escaped = item:gsub("([\\ $%%])", "\\%1")
		local cmd = "<cmd>SessionLoad " .. item_escaped .. "<CR>"
		table.insert(tbl, dashboard.button("s " .. i, item_short, cmd))
		i = i + 1
		if i > 9 then break end
	end

	return {
		type = "group",
		val = tbl,
		opts = {},
	}
end

local section_sessions = {
	type = "group",
	val = {
		{ type = "text", val = "Recent sessions", opts = { hl = "String", position = "center" } },
		{ type = "padding", val = 1 },
		section_sessions_entries(),
	},
}

-- 
--  actions
--

local section_buttons = {
	type = "group",
	val = {
		{ type = "text", val = "Actions", opts = { hl = "String", position = "center" } },
		{ type = "padding", val = 1 },
		dashboard.button("n", "New file", "<cmd>ene<CR>"),
		dashboard.button("q", "Quit", "<cmd>qa<CR>"),
	},
	position = "center",
}

-- 
--  config
--

return {
	layout = {
		{ type = "padding", val = 4 },
		section_fortune,
		{ type = "padding", val = 2 },
		section_sessions,
		{ type = "padding", val = 2 },
		section_buttons,
	},
	opts = {
		margin = 5,
		setup = function()
			vim.api.nvim_create_autocmd('DirChanged', {
				pattern = '*',
				group = "alpha_temp",
				callback = function () require('alpha').redraw() end,
			})
		end,
	},
}