package analyzer

import "path/filepath"

// locator uniquely identifies a section in the section table.
type locator struct {
	modulePath string
	name string
}

func (where locator) ToString () (output string) {
	output += where.modulePath + "." + where.name
	return
}

// SectionTable stores a list of semantically analized sections from one module,
// and all sections that it requires from other modules.
type SectionTable map[locator] Section

// ToString returns the data stored in the table as a string.
func (table SectionTable) ToString (indent int) (output string) {
	for _, section := range table {
		output += section.ToString(indent)
	}

	return
} 

// Section is a semantically analyzed section.
type Section interface {
	// Provided by sectionBase
	Name       () (name string)
	Complete   () (complete bool)
	ModulePath () (path string)
	ModuleName () (path string)

	// Must be implemented by each individual section
	ToString (indent int) (output string)
}

// sectionBase is a struct that all sections must embed.
type sectionBase struct {
	where    locator
	complete bool
}

// Name returns the name of the section.
func (section sectionBase) Name () (name string) {
	name = section.where.name
	return
}

// ModulePath returns the full path of the module the section came from.
func (section sectionBase) ModulePath () (path string) {
	path = section.where.modulePath
	return
}

// ModuleName returns the name of the module where the section came from.
func (section sectionBase) ModuleName () (name string) {
	name = filepath.Base(section.where.modulePath)
	return
}

// Complete returns wether the section has been completed.
func (section sectionBase) Complete () (complete bool) {
	complete = section.complete
	return
}