# Copyright, 2018, 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_relative 'statistics'
require_relative 'wrapper'

require 'rainbow'

module Covered
	class Summary
		def initialize(threshold: 1.0)
			@threshold = threshold
		end
		
		def each(wrapper)
			statistics = Statistics.new
			
			wrapper.each do |coverage|
				statistics << coverage
				
				if @threshold.nil? or coverage.ratio < @threshold
					yield coverage
				end
			end
			
			return statistics
		end
		
		def print_annotations(output, coverage, line, line_offset)
			if annotations = coverage.annotations[line_offset]
				output.write("#{line_offset}|".rjust(8))
				output.write("*|".rjust(8))
				
				output.write line.match(/^\s+/)
				output.write '# '
				
				output.puts Rainbow(annotations.join(", ")).bright
			end
		end
		
		# A coverage array gives, for each line, the number of line execution by the interpreter. A nil value means coverage is disabled for this line (lines like else and end).
		def call(wrapper, output = $stdout)
			statistics = self.each(wrapper) do |coverage|
				line_offset = 1
				
				path = wrapper.relative_path(coverage.path)
				output.puts "", Rainbow(path).bold.underline
				
				counts = coverage.counts
				
				coverage.read do |file|
					file.each_line do |line|
						count = counts[line_offset]
						
						print_annotations(output, coverage, line, line_offset)
						
						output.write("#{line_offset}|".rjust(8))
						output.write("#{count}|".rjust(8))
						
						if count == nil
							output.write Rainbow(line).faint
						elsif count == 0
							output.write Rainbow(line).red
						else
							output.write Rainbow(line).green
						end
						
						# If there was no newline at end of file, we add one:
						unless line.end_with? $/
							output.puts
						end
						
						line_offset += 1
					end
				end
				
				coverage.print(output)
			end
			
			statistics.print(output)
		end
	end
	
	class BriefSummary < Summary
		def call(wrapper, output = $stdout, before: 4, after: 4)
			ordered = []
			
			statistics = self.each(wrapper) do |coverage|
				ordered << coverage unless coverage.complete?
			end
			
			output.puts
			statistics.print(output)
			
			if ordered.any?
				output.puts "", "Least Coverage:"
				ordered.sort_by!(&:missing_count).reverse!
				
				ordered.first(5).each do |coverage|
					path = wrapper.relative_path(coverage.path)
					
					output.write Rainbow(path).orange
					output.puts ": #{coverage.missing_count} lines not executed!"
				end
			end
		end
	end
	
	class PartialSummary < Summary
		def call(wrapper, output = $stdout, before: 4, after: 4)
			statistics = self.each(wrapper) do |coverage|
				line_offset = 1
				
				path = wrapper.relative_path(coverage.path)
				output.puts "", Rainbow(path).bold.underline
				
				counts = coverage.counts
				last_line = nil
				
				unless coverage.zero?
					coverage.read do |file|
						file.each_line do |line|
							range = Range.new([line_offset - before, 0].max, line_offset+after)
							
							if counts[range]&.include?(0)
								count = counts[line_offset]
								
								if last_line and last_line != line_offset-1
									output.puts ":".rjust(16)
								end
								
								print_annotations(output, coverage, line, line_offset)
								
								prefix = "#{line_offset}|".rjust(8) + "#{count}|".rjust(8)
								
								if count == nil
									output.write prefix
									output.write Rainbow(line).faint
								elsif count == 0
									output.write Rainbow(prefix).background(:darkred)
									output.write Rainbow(line).red
								else
									output.write Rainbow(prefix).background(:darkgreen)
									output.write Rainbow(line).green
								end
								
								# If there was no newline at end of file, we add one:
								unless line.end_with? $/
									output.puts
								end
								
								last_line = line_offset
							end
							
							line_offset += 1
						end
					end
				end
				
				coverage.print(output)
			end
			
			output.puts
			statistics.print(output)
		end
	end
end