// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2025 ai-ad4 and the FreePDFEditor contributors
//
// Spike B step 1 main: run the glyph→Unicode ladder on a real PDF's embedded
// font and report coverage. Exit 0 if the ToUnicode path maps at least one
// glyph (proving the priority ladder's step 1 works on a real font); 1
// otherwise. The coverage and confidence numbers go in the JSON report's notes.
//
// Usage:
//   spike_b1_glyph_unicode <pdf_path>
//
// Defaults to a system PDF if none given.

#include "GlyphUnicode.h"
#include "../common/SpikeRunner.h"

#include <cstdio>
#include <cstdlib>
#include <string>

int main(int argc, char** argv)
{
    const std::string pdf_path = (argc >= 2) ? argv[1]
        : "/usr/share/doc/shared-mime-info/shared-mime-info-spec.pdf";

    auto r = freepdfeditor::spike::b1::map_glyphs(pdf_path);

    freepdfeditor::spike::SpikeResult sr{};
    sr.spike = "B1";
    sr.name = "glyph→Unicode via ToUnicode + cmap fallback";
    sr.total = r.mappings.size();
    sr.passed = r.mapped_via_tounicode;
    sr.failed = r.mapped_via_cmap;
    sr.errored = r.ok ? 0 : 1;
    sr.metric_name = "tounicode_coverage";
    sr.metric_value = r.coverage;
    sr.target = 0.0; // any ToUnicode mapping proves the ladder; no fixed gate
    sr.gate_met = r.ok && r.mapped_via_tounicode > 0;
    char buf[512];
    std::snprintf(buf, sizeof(buf),
        "pdf=%s glyphs=%zu via_tounicode=%zu via_cmap=%zu unmapped=%zu "
        "coverage=%.3f avg_confidence=%.3f; §4.1 step 1 ladder (step 1 ToUnicode, "
        "step 4 cmap fallback) exercised on a real embedded font",
        pdf_path.c_str(), r.mappings.size(),
        r.mapped_via_tounicode, r.mapped_via_cmap, r.unmapped,
        r.coverage, r.avg_confidence);
    sr.notes = buf;
    if (!r.ok) sr.notes += "; " + r.error;
    return freepdfeditor::spike::emit_json_report(sr);
}