// Package config defines PgTidy's formatter (and, later, linter) configuration.
//
// Defaults encode the project house style reverse-engineered from the corpus.
// A future change will load/merge these from a discovered .pgtidy.yaml file.
package config

// Case controls keyword/identifier casing.
type Case string

const (
	CaseUpper Case = "upper"
	CaseLower Case = "lower"
	// CasePreserve leaves the token text unchanged.
	CasePreserve Case = "preserve"
)

// CommaStyle controls where separators sit in multi-line lists.
type CommaStyle string

const (
	// CommaLeading puts the comma at the start of the continuation line
	// (",col"), the house style.
	CommaLeading CommaStyle = "leading"
	// CommaTrailing puts the comma at the end of the preceding line ("col,").
	CommaTrailing CommaStyle = "trailing"
)

// Style is the formatter configuration.
type Style struct {
	// Indent is one indentation level (default two spaces).
	Indent string
	// Newline is the line terminator emitted by the formatter.
	Newline string
	// KeywordCase controls SQL keyword casing (types excluded — see TypeCase).
	KeywordCase Case
	// IdentCase controls unquoted identifier casing (quoted identifiers are
	// never touched).
	IdentCase Case
	// TypeCase controls built-in type-name casing.
	TypeCase Case
	// Commas controls list separator placement.
	Commas CommaStyle
}

// Default returns the house-style configuration.
func Default() Style {
	return Style{
		Indent:      "  ",
		Newline:     "\n",
		KeywordCase: CaseUpper,
		IdentCase:   CaseLower,
		TypeCase:    CaseLower,
		Commas:      CommaLeading,
	}
}