#!/usr/bin/env ruby

# Copyright, 2012, by Samuel G. D. Williams. <http://www.codeotaku.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

require 'teapot/command'
require 'time'

def track_time
	start_time = Time.now
	
	yield
ensure
	end_time = Time.now
	elapsed_time = end_time - start_time
	
	$stdout.flush
	$stderr.puts Rainbow("Elapsed Time: %0.3fs" % elapsed_time).magenta
end

def parse_argv
	if split_index = ARGV.index('--')
		ARGV.shift(split_index).tap{ARGV.shift}
	else
		ARGV.slice!(0..-1)
	end
end

# Get the arguments up until "--"
ARGUMENTS = parse_argv

OPTIONS = Trollop::options(ARGUMENTS) do
	banner Rainbow("Teapot: a decentralised package manager and build tool.").bright.blue
	version "teapot #{Teapot::VERSION}"
	
	opt :configuration, "Specify a specific build configuration.", :type => :string
	
	opt :limit, "Limit build to <i> concurrent processes at once where possible", :type => :integer
	
	opt :only, "Only compiled direct dependencies."
	opt :continuous, "Run the build graph continually (experimental).", :type => :boolean, :short => :n
	
	opt :in, "Work in the given directory.", :type => :string
	opt :unlock, "Don't use package lockfile when fetching."
	
	opt :force, "Force the operation if it would otherwise be be stopped due to a warning."
	
	opt :verbose, "Verbose output and error backtraces.", :type => :boolean
	
	opt :version, "Print version and exit", :short => :none
	opt :help, "Show this message"
end

track_time do
	begin
		Teapot::Command.new(ARGUMENTS, OPTIONS).invoke
	rescue Teapot::IncompatibleTeapotError => error
		$stderr.puts error.message.color(:red)
		$stderr.puts "Supported minimum version #{Teapot::MINIMUM_LOADER_VERSION.dump} to #{Teapot::LOADER_VERSION.dump}."
		
		exit -3
	rescue Teapot::Dependency::UnresolvedDependencyError => error
		$stderr.puts "Unresolved dependencies:"

		error.chain.unresolved.each do |(name, parent)|
			$stderr.puts "#{parent} depends on #{name.inspect}".color(:red)
		
			conflicts = error.chain.conflicts[name]
		
			if conflicts
				conflicts.each do |conflict|
					$stderr.puts " - provided by #{conflict.name}".color(:red)
				end
			end
		end
	
		$stderr.puts "Cannot continue due to unresolved dependencies!".color(:red)
		
		exit -5
	rescue StandardError => error
		$stderr.puts error.message.color(:red)
		
		# Could be nice to have some improved error reporting.
		if OPTIONS[:verbose]
			$stderr.puts error.backtrace
		else
			$stderr.puts "Run with --verbose for more details."
		end
		
		exit -10
	end
end