// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: MIT

package io

// Benchmarks for the paths the coordinator's battery does not isolate.
// Every fixture is deterministic and built before the measured loop.

import (
	"os"
	"path/filepath"
	"testing"
)

// BenchmarkWaveFITSBinaryTextCells measures the character-column decode
// alone: one 8A column of four thousand rows, the per-cell work the
// binary-table benchmark mixes with seven numeric columns.
func BenchmarkWaveFITSBinaryTextCells(b *testing.B) {
	const rows = 4000
	path := filepath.Join(b.TempDir(), "textcells.fits")
	body := make([]byte, rows*8)
	for r := range rows {
		copy(body[r*8:], "star    ")
	}
	cards := []string{
		fitsStringCardRaw("XTENSION", "BINTABLE"),
		fitsIntCard("BITPIX", 8),
		fitsIntCard("NAXIS", 2),
		fitsIntCard("NAXIS1", 8),
		fitsIntCard("NAXIS2", rows),
		fitsIntCard("PCOUNT", 0),
		fitsIntCard("GCOUNT", 1),
		fitsIntCard("TFIELDS", 1),
		fitsStringCardRaw("TTYPE1", "STAR"),
		fitsStringCardRaw("TFORM1", "8A"),
		fitsEndCard(),
	}
	out := fitsAppendCards(nil, []string{
		fitsBoolCard("SIMPLE", true),
		fitsIntCard("BITPIX", 8),
		fitsIntCard("NAXIS", 0),
		fitsBoolCard("EXTEND", true),
		fitsEndCard(),
	})
	out = fitsAppendCards(out, cards)
	out = append(out, body...)
	out = fitsAppendZeroPad(out)
	if err := os.WriteFile(path, out, 0o644); err != nil {
		b.Fatal(err)
	}
	b.ReportAllocs()
	for b.Loop() {
		table, err := LoadFITSTable(path)
		if err != nil {
			b.Fatal(err)
		}
		if table.Rows != rows || table.Text[0] == nil || table.Text[0][0] != "star" {
			b.Fatalf("table came back as %s with %d rows", table.Kind, table.Rows)
		}
	}
}