--[[

  pkgit - package it!

  Copyright (C) 2026 dacctal
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <https://www.gnu.org/licenses/>.

]]

local bldit = {}
bldit.version = "2.0.0"
bldit.package_version = bldit.version

-- fetchers; entirely made by the developer --
local fetchers = {}
fetchers.git = {
	get_source = function(url, version) return pkgit.run({
		"git clone "..url.." --branch "..version
	}) end,
	get_version = function(url) return io.popen(
		"git -c 'versionsort.suffix=-' \
		ls-remote --exit-code --refs --sort='version:refname' \
		--tags "..url.." '*.*.*' \
		| tail --lines=1 \
		| cut --delimiter='/' --fields=3"
	):read("*a") end,
}
-- fetchers; entirely made by the developer --

-- dependencies; completely optional --
bldit.dependencies = {
	luajit = {
		url = "https://luajit.org/git/luajit.git",
		version = "v2.1",
		fetcher = fetchers.git,
		recipe = bldit.recipe
	}
}
-- dependencies; completely optional --

bldit.opts = {}
if user == nil then
	bldit.opts.prefix = os.getenv("HOME").."/.local"
else
	bldit.opts.prefix = user.dirs.prefix
end
bldit.opts.CC = os.getenv("CC")
if bldit.opts.CC == nil then bldit.opts.CC = "cc" end
bldit.opts.LDFLAGS = os.getenv("LDFLAGS")
if bldit.opts.LDFLAGS == nil then bldit.opts.LDFLAGS = "" end
bldit.opts.CFLAGS = os.getenv("CFLAGS")
if bldit.opts.CFLAGS == nil then
	bldit.opts.CFLAGS = "$(pkg-config --cflags luajit) -I./include "
	.."-Wno-format-truncation -std=c99 -DVERSION='\""
	..bldit.version.."\"'"
else bldit.opts.CFLAGS = bldit.opts.CFLAGS
	.." $(pkg-config --cflags luajit) -I./include"
	.." -Wno-format-truncation -std=c99 -DVERSION='\""
	..bldit.version.."\"'"
end

local function build_cmd()
	return "mkdir -p obj \n"
		.."for f in src/*.c; do \\\n"
		.."echo \"\tCC\t$f\" \n"
		..bldit.opts.CC.." -c \"$f\" -o \"obj/$(basename \"${f%.c}\").o\" \\\n"
		..bldit.opts.CFLAGS.." || exit 1 \n"
		.."done \n"
		..bldit.opts.CC.." "..bldit.opts.CFLAGS
		.." $(pkg-config --libs luajit) "
		..bldit.opts.LDFLAGS.." obj/*.o -o pkgit"
end

local install_cmd = "echo \"\tINSTALL\t\""..bldit.opts.prefix.."\n"
	.."install -d "
	..bldit.opts.prefix.."/bin\n"
	.."install -m 755 pkgit "
	..bldit.opts.prefix.."/bin/pkgit\n"
	.."install -d "
	..bldit.opts.prefix.."/share/man/man1\n"
	.."install -m 644 docs/pkgit.1 "
	..bldit.opts.prefix.."/share/man/man1/pkgit.1"

local remove_cmd = "echo \"\tUNINSTALL\t\""..bldit.opts.prefix.."\n"
	.."rm -f "..bldit.opts.prefix.."/bin/pkgit \n"
	.."rm -f "..bldit.opts.prefix.."/share/man/man1/pkgit.1"

bldit.recipe = {
	clean = function()
		print("\tCLEAN")
		return os.execute("rm -rf obj && rm -f pkgit")
	end,

	build = function()
		return os.execute(build_cmd())
	end,

	gdb = function()
		bldit.opts.CFLAGS = bldit.opts.CFLAGS
			.." -g -O0 -Wall -Wextra -Werror -Wvla -pedantic"
		return os.execute(build_cmd())
	end,

	debug = function()
		bldit.opts.CFLAGS = bldit.opts.CFLAGS
			.." -g -O0 -Wall -Wextra -Werror -Wvla -pedantic -fsanitize=address"
		bldit.opts.LDFLAGS = bldit.opts.LDFLAGS
			.." -fsanitize=address"
		return os.execute(build_cmd())
	end,

	install = function()
		return os.execute(install_cmd)
	end,

	remove = function()
		return os.execute(remove_cmd)
	end,

	defconfig = function()
		return os.execute("if [ \"$(id -u)\" -eq 0 ]; then \\\n"
		.."dir=/etc/pkgit; else dir=\"$HOME/.config/pkgit\"; fi; \\\n"
		.."echo \"installing default config to $dir ...\"; \\\n"
		.."mkdir -p \"$dir/\"; \\\n"
		.."cp -r ./config/* \"$dir/\"; \\\n"
		.."echo 'default config installed'")
	end,

	rmconfig = function()
		return os.execute("if [ \"$(id -u)\" -eq 0 ]; then "
		.."dir=/etc/pkgit; else dir=\"$HOME/.config/pkgit\"; fi; \\\n"
		.."echo \"removing config from $dir ...\"; \\\n"
		.."rm -rf \"$dir/\"; \\\n"
		.."echo 'config successfully removed'")
	end,
}

return bldit