local template = [[local common_fg = "$common_fg"
local inactive_bg = "$inactive_bg"
local inactive_fg = "$inactive_fg"

return {
	normal = {
		a = { bg = "$normal_a_bg", fg = common_fg, gui = "bold" },
		b = { bg = "$normal_b_bg", fg = common_fg },
		c = { bg = "$normal_c_bg", fg = "$normal_c_fg" },
	},

	insert = {
		a = { bg = "$insert_a_bg", fg = common_fg, gui = "bold" },
	},

	command = {
		a = { bg = "$command_a_bg", fg = common_fg, gui = "bold" },
	},

	visual = {
		a = { bg = "$visual_a_bg", fg = common_fg, gui = "bold" },
	},

	replace = {
		a = { bg = "$replace_a_bg", fg = common_fg, gui = "bold" },
	},

	inactive = {
		a = { bg = inactive_bg, fg = inactive_fg, gui = "bold" },
		b = { bg = inactive_bg, fg = inactive_fg },
		c = { bg = inactive_bg, fg = inactive_fg },
	},
}]]

local helpers = require "shipwright.transform.helpers"

local check_keys = {
	"common_fg",
	"inactive_bg",
	"inactive_fg",
	"normal_a_bg",
	"normal_b_bg",
	"normal_c_bg",
	"normal_c_fg",
	"insert_a_bg",
	"command_a_bg",
	"visual_a_bg",
	"replace_a_bg",
}

local function to_lualine(colors)
	for _, key in ipairs(check_keys) do
		assert(colors[key], "lualine colors table missing key: " .. key)
	end

	local text = helpers.apply_template(template, colors)
	return { text }
end

local function specs_to_colors(colorscheme)
	local specs, background = unpack(colorscheme)
	local da = background == "light" and -3 or 3
	return {
		common_fg = specs.Folded.fg,
		inactive_bg = specs.StatusLineNC.bg,
		inactive_fg = specs.StatusLineNC.fg,
		normal_a_bg = specs.PmenuSbar.bg.abs_da(da),
		normal_b_bg = specs.PmenuSel.bg.abs_da(da),
		normal_c_bg = specs.StatusLine.bg.abs_da(da),
		normal_c_fg = specs.StatusLine.fg,
		insert_a_bg = specs.DiffText.bg,
		command_a_bg = specs.Search.bg,
		visual_a_bg = specs.Visual.bg,
		replace_a_bg = specs.DiffDelete.bg,
	}
end

local ness_list = { "dim", "bright", "stark", "warm", "default" }

for _, ness in ipairs(ness_list) do
	local specs_name = ness ~= "default" and "specs_" .. ness or "specs"
	local specs = getfenv()[specs_name]
	if specs then
		---@diagnostic disable: undefined-global
		-- selene: allow(undefined_variable)
		run(
			{ specs, background },
			specs_to_colors,
			to_lualine,
			{ prepend, "-- This file is auto-generated by shipwright.nvim" },
			{ overwrite, string.format("lua/lualine/themes/%s_%s.lua", name, ness) }
		)
		-- selene: deny(undefined_variable)
		---@diagnostic enable: undefined-global
	end
end