local template = [[let s:p = {'normal': {}, 'inactive': {}, 'insert': {}, 'replace': {}, 'visual': {}, 'tabline': {}}

let s:p.normal.left = [ [ "$common_fg", "$normal_a_bg", "bold" ], [ "$common_fg", "$normal_b_bg" ] ]
let s:p.normal.middle = [ [ "$normal_c_fg", "$normal_c_bg" ] ]
let s:p.normal.right = [ [ "$common_fg", "$normal_b_bg" ], [ "$common_fg", "$normal_b_bg" ] ]
let s:p.normal.warning = [ [ "$warning_fg", "$warning_bg" ] ]
let s:p.normal.error = [ [ "$error_fg", "$error_bg" ] ]

let s:p.inactive.left =  [ [ "$inactive_fg", "$inactive_bg" ], [ "$inactive_fg", "$inactive_bg" ] ]
let s:p.inactive.middle = [ [ "$inactive_fg", "$inactive_bg" ] ]
let s:p.inactive.right = [ [ "$inactive_fg", "$inactive_bg" ] ]

let s:p.insert.left = [ [ "$common_fg", "$insert_a_bg", "bold" ], [ "$common_fg", "$normal_b_bg" ] ]
let s:p.replace.left = [ [ "$common_fg", "$replace_a_bg", "bold" ], [ "$common_fg", "$normal_b_bg" ] ]
let s:p.visual.left = [ [ "$common_fg", "$visual_a_bg", "bold" ], [ "$common_fg", "$normal_b_bg" ] ]

let s:p.tabline.left = [ [ "$tabline_left_fg", "$tabline_left_bg", "italic" ] ]
let s:p.tabline.middle = [ [ "$inactive_fg", "$inactive_bg" ] ]
let s:p.tabline.right = [ [ "$tabline_right_fg", "$tabline_right_bg" ] ]
let s:p.tabline.tabsel = [ [ "$tabsel_fg", "$tabsel_bg", "bold" ] ]

let g:lightline#colorscheme#$name#palette = lightline#colorscheme#fill(s:p)]]

local helpers = require "shipwright.transform.helpers"

local check_keys = {
	"name",
	"common_fg",
	"inactive_bg",
	"inactive_fg",
	"normal_a_bg",
	"normal_b_bg",
	"normal_c_bg",
	"normal_c_fg",
	"insert_a_bg",
	"visual_a_bg",
	"replace_a_bg",
	"tabline_left_bg",
	"tabline_left_fg",
	"tabline_right_bg",
	"tabline_right_fg",
	"tabsel_bg",
	"tabsel_fg",
	"warning_bg",
	"warning_fg",
	"error_bg",
	"error_fg",
}

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

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

local function specs_to_colors(colorscheme)
	local specs, name, background = unpack(colorscheme)
	local da = background == "light" and -3 or 3
	return {
		name = name,
		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,
		visual_a_bg = specs.Visual.bg,
		replace_a_bg = specs.DiffDelete.bg,
		tabline_left_bg = specs.PmenuSel.bg.abs_da(da),
		tabline_left_fg = specs.Normal.fg,
		tabline_right_bg = specs.PmenuSel.bg.abs_da(da),
		tabline_right_fg = specs.Normal.fg,
		tabsel_bg = specs.Normal.bg,
		tabsel_fg = specs.Normal.fg,
		warning_bg = specs.DiagnosticVirtualTextWarn.bg,
		warning_fg = specs.DiagnosticVirtualTextWarn.fg,
		error_bg = specs.DiagnosticVirtualTextError.bg,
		error_fg = specs.DiagnosticVirtualTextError.fg,
	}
end

---@diagnostic disable: undefined-global
-- selene: allow(undefined_variable)
run(
	{ specs, name, background },
	specs_to_colors,
	transform,
	{ prepend, [[" This file is auto-generated by shipwright.nvim]] },
	{ overwrite, string.format("autoload/lightline/colorscheme/%s.vim", name) }
)
-- selene: deny(undefined_variable)
---@diagnostic enable: undefined-global