package meta

import "core:fmt"
import "core:os"

Command :: struct {
	name:        string,
	description: string,
	run:         proc() -> bool,
}

COMMANDS :: []Command {
	{
		name = "gen-shaders",
		description = "Compile GLSL shaders to SPIR-V and Metal Shading Language.",
		run = proc() -> bool {
			return gen_shaders("draw/shaders/source", "draw/shaders/generated")
		},
	},
}

main :: proc() {
	args := os.args[1:]

	if len(args) == 0 {
		print_usage()
		return
	}

	command_name := args[0]
	for command in COMMANDS {
		if command.name == command_name {
			if !command.run() do os.exit(1)
			return
		}
	}

	fmt.eprintfln("Unknown command '%s'.", command_name)
	fmt.eprintln()
	print_usage()
	os.exit(1)
}

print_usage :: proc() {
	fmt.eprintln("Usage: meta <command>")
	fmt.eprintln()
	fmt.eprintln("Commands:")
	for command in COMMANDS {
		fmt.eprintfln("  %-20s %s", command.name, command.description)
	}
}