require "spec"
require "./src/context.cr"
require "./src/recipe.cr"

extend Package

# FIXME: recipe.clean? context autoclean?
context = Context.new()
context.packaging_backend = "apk"

recipes = [] of Package::Recipe

class SpecFileParser
	def get_string?(id) : String?
		entry = self.assignments[id]?

		unless entry.is_a? StringContainer
			nil
		else
			entry.value
		end
	end
	def get_string(id) : String
		entry = self.assignments[id]?

		unless entry.is_a? StringContainer
			raise Exception.new "`#{id}` was expected to be a string, but was a #{entry.class}."
		end

		entry.value
	end

	def get_long_string?(id) : String?
		entry = self.assignments[id]?

		unless entry.is_a? LongStringContainer
			nil
		else
			entry.value
		end
	end

	def get_string_any?(id) : String?
		get_string?(id) || get_long_string?(id)
	end

	def get_list?(id) : Array(String)?
		entry = assignments[id]?
		
		case entry
		when SpecFileParser::ArrayContainer
			entry.value
		when SpecFileParser::StringContainer
			entry.value.split(",")
		when Nil
			return nil
		else
			raise Exception.new "`#{id}` was expected to be a list (string), but was a `#{entry.class}`"
		end
	end
end

class Package::Recipe
	def initialize(@context, specs : SpecFileParser)
		pp! specs

		@name = specs.get_string "name"
		@version = specs.get_string "version"
		@release = specs.get_string?("release").try(&.to_i) || 1

		@url = specs.get_string? "url"
		@description = specs.get_string_any? "description"
		@packager = specs.get_string? "packager"
		@maintainer = specs.get_string? "packager"

		specs.get_string_any?("configure").try do |script|
			@instructions.configure << script
		end

		specs.get_string_any?("build").try do |script|
			@instructions.build << script
		end

		specs.get_string_any?("install").try do |script|
			@instructions.install << script
		end

		specs.get_list?("dependencies").try &.each do |atom|
			@dependencies << atom
		end

		specs.get_list?("conflicts").try &.each do |atom|
			@conflicts << atom
		end

		specs.get_list?("provides").try &.each do |atom|
			@provides << atom
		end

		specs.get_list?("sources").try &.each do |source|
			@sources << source
		end

		specs.get_list?("options").try &.each do |option|
			match  = option.match /\(.*\) *= *\(.*\)/
			unless match
				puts "WARNING: misformed option: #{option}"
				next
			end
			
			name, value = match

			puts "OPTION: #{name} -> #{value}"

			@options[name] = value
		end
	end
end

class Package::Context
	def read_recipe(filename : String)
		specs = SpecFileParser.parse filename

		if specs.nil?
			raise Exception.new "file could not be parsed"
		end

		Recipe.new self, specs
	end
end

pp! context.read_recipe "test.spec"

if ARGV.size == 0 || ARGV[0]? == "-h"
	pp recipes.map &.name
	exit 0
end


recipes.each do |recipe|
	pp recipe

	raise "oh no, download failed" unless recipe.download
	raise "oh no, extraction failed" unless recipe.extract

	raise "oh no, build failed" unless recipe.build
	raise "oh no, packaging failed" unless recipe.package

	recipe.clean
end