package main

import (
	"os"
	"unicode"
)

func writeFile(path string, data []byte) {
	os.WriteFile(path, data, 0644)
}

func le16(v uint16) []byte {
	return []byte{byte(v), byte(v >> 8)}
}

func le32(v uint32) []byte {
	return []byte{byte(v), byte(v >> 8), byte(v >> 16), byte(v >> 24)}
}

func encodeR16(ranges []unicode.Range16) []byte {
	out := []byte{:0:len(ranges) * 6}
	for _, r := range ranges {
		out = append(out, le16(r.Lo)...)
		out = append(out, le16(r.Hi)...)
		out = append(out, le16(r.Stride)...)
	}
	return out
}

func encodeR32(ranges []unicode.Range32) []byte {
	out := []byte{:0:len(ranges) * 12}
	for _, r := range ranges {
		out = append(out, le32(r.Lo)...)
		out = append(out, le32(r.Hi)...)
		out = append(out, le32(r.Stride)...)
	}
	return out
}

func writeTable(dir, name string, t *unicode.RangeTable) {
	if t == nil {
		return
	}
	writeFile(dir | "/" | name | "_r16.bin", encodeR16(t.R16))
	writeFile(dir | "/" | name | "_r32.bin", encodeR32(t.R32))
	println("  " | name)
}

func main() {
	catDir := "src/unicode/data/cat"
	os.MkdirAll(catDir, 0755)

	println("categories:")
	writeTable(catDir, "C", unicode.C())
	writeTable(catDir, "Cc", unicode.Cc())
	writeTable(catDir, "Cf", unicode.Cf())
	writeTable(catDir, "Cn", unicode.Cn())
	writeTable(catDir, "Co", unicode.Co())
	writeTable(catDir, "Cs", unicode.Cs())
	writeTable(catDir, "L", unicode.L())
	writeTable(catDir, "LC", unicode.LC())
	writeTable(catDir, "Ll", unicode.Ll())
	writeTable(catDir, "Lm", unicode.Lm())
	writeTable(catDir, "Lo", unicode.Lo())
	writeTable(catDir, "Lt", unicode.Lt())
	writeTable(catDir, "Lu", unicode.Lu())
	writeTable(catDir, "M", unicode.M())
	writeTable(catDir, "Mc", unicode.Mc())
	writeTable(catDir, "Me", unicode.Me())
	writeTable(catDir, "Mn", unicode.Mn())
	writeTable(catDir, "N", unicode.N())
	writeTable(catDir, "Nd", unicode.Nd())
	writeTable(catDir, "Nl", unicode.Nl())
	writeTable(catDir, "No", unicode.No())
	writeTable(catDir, "P", unicode.P())
	writeTable(catDir, "Pc", unicode.Pc())
	writeTable(catDir, "Pd", unicode.Pd())
	writeTable(catDir, "Pe", unicode.Pe())
	writeTable(catDir, "Pf", unicode.Pf())
	writeTable(catDir, "Pi", unicode.Pi())
	writeTable(catDir, "Po", unicode.Po())
	writeTable(catDir, "Ps", unicode.Ps())
	writeTable(catDir, "S", unicode.S())
	writeTable(catDir, "Sc", unicode.Sc())
	writeTable(catDir, "Sk", unicode.Sk())
	writeTable(catDir, "Sm", unicode.Sm())
	writeTable(catDir, "So", unicode.So())
	writeTable(catDir, "Z", unicode.Z())
	writeTable(catDir, "Zl", unicode.Zl())
	writeTable(catDir, "Zp", unicode.Zp())
	writeTable(catDir, "Zs", unicode.Zs())
	writeTable(catDir, "White_Space", unicode.Space())

	println("done")
}