#!/bin/bash
# ref_resolvers/lua.sh
# Resolves a Lua manual section reference to its full URL.
# The reference name is read from stdin.
# Outputs the URL to stdout.
reference="$(cat)"
webroot="https://www.lua.org/manual/5.2/manual.html"

case $(echo $reference | tr '[:upper:]' '[:lower:]') in

	"introduction")
		printf "%s#%s" "$webroot" "1"
		exit 0
		;;

	"basic concepts")
		printf "%s#%s" "$webroot" "2"
		exit 0
		;;

	"values and types")
		printf "%s#%s" "$webroot" "2.1"
		exit 0
		;;

	"environments and the global environment")
		printf "%s#%s" "$webroot" "2.2"
		exit 0
		;;

	"error handling")
		printf "%s#%s" "$webroot" "2.3"
		exit 0
		;;

	"metatables and metamethods")
		printf "%s#%s" "$webroot" "2.4"
		exit 0
		;;

	"garbage collection")
		printf "%s#%s" "$webroot" "2.5"
		exit 0
		;;

	"garbage-collection metamethods")
		printf "%s#%s" "$webroot" "2.5.1"
		exit 0
		;;

	"weak tables")
		printf "%s#%s" "$webroot" "2.5.2"
		exit 0
		;;

	"coroutines")
		printf "%s#%s" "$webroot" "2.6"
		exit 0
		;;

	"the language")
		printf "%s#%s" "$webroot" "3"
		exit 0
		;;

	"lexical conventions")
		printf "%s#%s" "$webroot" "3.1"
		exit 0
		;;

	"variables")
		printf "%s#%s" "$webroot" "3.2"
		exit 0
		;;

	"statements")
		printf "%s#%s" "$webroot" "3.3"
		exit 0
		;;

	"blocks")
		printf "%s#%s" "$webroot" "3.3.1"
		exit 0
		;;

	"chunks")
		printf "%s#%s" "$webroot" "3.3.2"
		exit 0
		;;

	"assignment")
		printf "%s#%s" "$webroot" "3.3.3"
		exit 0
		;;

	"control structures")
		printf "%s#%s" "$webroot" "3.3.4"
		exit 0
		;;

	"for statement")
		printf "%s#%s" "$webroot" "3.3.5"
		exit 0
		;;

	"function calls as statements")
		printf "%s#%s" "$webroot" "3.3.6"
		exit 0
		;;

	"local declarations")
		printf "%s#%s" "$webroot" "3.3.7"
		exit 0
		;;

	"expressions")
		printf "%s#%s" "$webroot" "3.4"
		exit 0
		;;

	"arithmetic operators")
		printf "%s#%s" "$webroot" "3.4.1"
		exit 0
		;;

	"coercion")
		printf "%s#%s" "$webroot" "3.4.2"
		exit 0
		;;

	"relational operators")
		printf "%s#%s" "$webroot" "3.4.3"
		exit 0
		;;

	"logical operators")
		printf "%s#%s" "$webroot" "3.4.4"
		exit 0
		;;

	"concatenation")
		printf "%s#%s" "$webroot" "3.4.5"
		exit 0
		;;

	"the length operator")
		printf "%s#%s" "$webroot" "3.4.6"
		exit 0
		;;

	"precedence")
		printf "%s#%s" "$webroot" "3.4.7"
		exit 0
		;;

	"table constructors")
		printf "%s#%s" "$webroot" "3.4.8"
		exit 0
		;;

	"function calls")
		printf "%s#%s" "$webroot" "3.4.9"
		exit 0
		;;

	"function definitions")
		printf "%s#%s" "$webroot" "3.4.10"
		exit 0
		;;

	"visibility rules")
		printf "%s#%s" "$webroot" "3.5"
		exit 0
		;;

	"the application program interface")
		printf "%s#%s" "$webroot" "4"
		exit 0
		;;

	"the stack")
		printf "%s#%s" "$webroot" "4.1"
		exit 0
		;;

	"stack size")
		printf "%s#%s" "$webroot" "4.2"
		exit 0
		;;

	"valid and acceptable indices")
		printf "%s#%s" "$webroot" "4.3"
		exit 0
		;;

	"c closures")
		printf "%s#%s" "$webroot" "4.4"
		exit 0
		;;

	"registry")
		printf "%s#%s" "$webroot" "4.5"
		exit 0
		;;

	"error handling in c")
		printf "%s#%s" "$webroot" "4.6"
		exit 0
		;;

	"handling yields in c")
		printf "%s#%s" "$webroot" "4.7"
		exit 0
		;;

	"functions and types")
		# Matches section 4.8 (C API). Section 5.1 (Auxiliary Library) has the
		# same title; this entry resolves to the first occurrence.
		printf "%s#%s" "$webroot" "4.8"
		exit 0
		;;

	"the debug interface")
		printf "%s#%s" "$webroot" "4.9"
		exit 0
		;;

	"the auxiliary library")
		printf "%s#%s" "$webroot" "5"
		exit 0
		;;

	"standard libraries")
		printf "%s#%s" "$webroot" "6"
		exit 0
		;;

	"basic functions")
		printf "%s#%s" "$webroot" "6.1"
		exit 0
		;;

	"coroutine manipulation")
		printf "%s#%s" "$webroot" "6.2"
		exit 0
		;;

	"modules")
		printf "%s#%s" "$webroot" "6.3"
		exit 0
		;;

	"string manipulation")
		printf "%s#%s" "$webroot" "6.4"
		exit 0
		;;

	"patterns")
		printf "%s#%s" "$webroot" "6.4.1"
		exit 0
		;;

	"table manipulation")
		printf "%s#%s" "$webroot" "6.5"
		exit 0
		;;

	"mathematical functions")
		printf "%s#%s" "$webroot" "6.6"
		exit 0
		;;

	"bitwise operations")
		printf "%s#%s" "$webroot" "6.7"
		exit 0
		;;

	"input and output facilities")
		printf "%s#%s" "$webroot" "6.8"
		exit 0
		;;

	"operating system facilities")
		printf "%s#%s" "$webroot" "6.9"
		exit 0
		;;

	"the debug library")
		printf "%s#%s" "$webroot" "6.10"
		exit 0
		;;

	"lua standalone")
		printf "%s#%s" "$webroot" "7"
		exit 0
		;;

	"incompatibilities with the previous version")
		printf "%s#%s" "$webroot" "8"
		exit 0
		;;

	"changes in the language")
		printf "%s#%s" "$webroot" "8.1"
		exit 0
		;;

	"changes in the libraries")
		printf "%s#%s" "$webroot" "8.2"
		exit 0
		;;

	"changes in the api")
		printf "%s#%s" "$webroot" "8.3"
		exit 0
		;;

	"the complete syntax of lua")
		printf "%s#%s" "$webroot" "9"
		exit 0
		;;

	# Lua type names — resolve to the Values and Types section (2.1)
	"nil" \
	| "boolean" \
	| "number" \
	| "string" \
	| "function" \
	| "userdata" \
	| "thread" \
	| "table")
		printf "%s#%s" "$webroot" "2.1"
		exit 0
		;;

	# Alternative lowercase spelling for coroutines
	"coroutines")
		printf "%s#%s" "$webroot" "2.6"
		exit 0
		;;

esac