package schema

// Column represents a single column in a table.
type Column struct {
	TableName              string `db:"table_name"`
	Name                   string `db:"column_name"`
	Type                   string `db:"column_type"`
	IsNotNull              bool   `db:"notnull"`
	HasDefaultValue        bool   `db:"has_default_value"`
	DefaultValue           string `db:"dflt_value"`
	IsPrimaryKey           bool   `db:"is_primary_key"`
	PrimaryKeyRank         uint   `db:"primary_key_rank"`
	IsForeignKey           bool   `db:"is_foreign_key"`
	ForeignKeyTargetTable  string `db:"fk_target_table"`
	ForeignKeyTargetColumn string `db:"fk_target_column"`
}

// IsNullableForeignKey is a helper function.
func (c Column) IsNullableForeignKey() bool {
	return !c.IsNotNull && !c.IsPrimaryKey && c.IsForeignKey
}

// Table is a single SQLite table.
type Table struct {
	TableName      string `db:"name"`
	IsStrict       bool   `db:"is_strict"`
	IsWithoutRowid bool   `db:"is_without_rowid"`

	Columns []Column

	TypeIDName string
	VarName    string
	TypeName   string
}

type Index struct {
	Name      string `db:"index_name"`
	TableName string `db:"table_name"`
	Columns   []string
	IsUnique  bool `db:"is_unique"`
	// TODO: `where ...` for partial indexes
}

type Schema struct {
	Tables  map[string]Table
	Indexes map[string]Index
}