#!/usr/bin/env python3
"""Generate SecureCodePairs v1.1.0 statistics: CSV reports + ASCII bar charts (no deps)."""
import csv
import json
import os
from collections import Counter

ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
DATASET_DIR = os.path.join(ROOT, "dataset")
STAT_DIR = os.path.join(ROOT, "statistics")
SPLITS = ("train", "validation", "test", "benchmark")


def load_all():
    recs = []
    for name in SPLITS:
        with open(os.path.join(DATASET_DIR, f"{name}.jsonl"), encoding="utf-8") as f:
            for line in f:
                line = line.strip()
                if line:
                    recs.append(json.loads(line))
    return recs


def write_csv(path, rows, header):
    with open(path, "w", newline="", encoding="utf-8") as f:
        w = csv.writer(f)
        w.writerow(header)
        w.writerows(rows)


def bar(label, count, total, width=40):
    n = max(1, int(round(count / max(total, 1) * width)))
    return f"{label[:24]:<24} | {'#' * n} {count} ({count / max(total, 1) * 100:.0f}%)"


def main():
    recs = load_all()
    total = len(recs)
    os.makedirs(STAT_DIR, exist_ok=True)

    langs = Counter(r["language"] for r in recs)
    fw = Counter(r["framework"] for r in recs)
    sev = Counter(r["severity"] for r in recs)
    cwe = Counter(r["cwe"] for r in recs)
    owasp = Counter(r["owasp"] for r in recs)
    diff = Counter(r["difficulty"] for r in recs)
    dom = Counter(r["metadata"].get("domain", "unknown") for r in recs)

    write_csv(os.path.join(STAT_DIR, "language_distribution.csv"),
              [(k, v) for k, v in langs.most_common()], ["language", "count"])
    write_csv(os.path.join(STAT_DIR, "framework_distribution.csv"),
              [(k, v) for k, v in fw.most_common()], ["framework", "count"])
    write_csv(os.path.join(STAT_DIR, "severity_distribution.csv"),
              [(k, v) for k, v in sev.most_common()], ["severity", "count"])
    write_csv(os.path.join(STAT_DIR, "difficulty_distribution.csv"),
              [(k, v) for k, v in diff.most_common()], ["difficulty", "count"])
    write_csv(os.path.join(STAT_DIR, "cwe_distribution.csv"),
              [(k, v) for k, v in cwe.most_common()], ["cwe", "count"])
    write_csv(os.path.join(STAT_DIR, "owasp_distribution.csv"),
              [(k, v) for k, v in owasp.most_common()], ["owasp", "count"])
    write_csv(os.path.join(STAT_DIR, "domain_distribution.csv"),
              [(k, v) for k, v in dom.most_common()], ["domain", "count"])

    # SecureCodePairs - Statistics (v1.2.0)
    lines.append(f"Total records: **{total}**\n")
    for title, ctr in (("Language", langs), ("Framework", fw),
                       ("Severity", sev), ("Difficulty", diff),
                       ("Domain", dom), ("CWE (top 25)", cwe), ("OWASP", owasp)):
        lines.append(f"## {title} distribution\n")
        top = ctr.most_common(25) if "CWE" in title else ctr.most_common()
        for k, v in top:
            lines.append(bar(k, v, total))
        lines.append("")

    with open(os.path.join(STAT_DIR, "charts.txt"), "w", encoding="utf-8") as f:
        f.write("\n".join(lines))

    print("\n".join(lines[:16]))
    print("\nCSV reports + charts written to", STAT_DIR)


if __name__ == "__main__":
    main()