"""CLI entry point for the AI Research Oracle.

Single command with subcommands for all operations.
Replaces scattered root scripts with one unified interface.

Usage:
    python -m oracle <command> [args]

Commands:
    ingest        Run the ingestion pipeline (fetch + store + score)
    summarize     Generate summaries for unscored entries
    query         Query the database (top, search, recent, stats, snapshot)
    render        Render static site from clickability index
    archive       Soft-cap archival of old entries
    themes        Theme-based trend tracking
    recency       Recency guard analysis
    health        System health check
"""
import argparse
import json
import os
import sys
from datetime import datetime, timezone

# Ensure project root is on path
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from oracle.config import DB_PATH, SCHEMA_PATH, ENABLED_SOURCES, DEFAULT_LIMIT, SOURCE_TIERS, VERDICT_THRESHOLDS
from oracle.db import get_connection, init_db, get_stats, query_top, query_recent, query_search, query_by_tag, migrate_world_monitor
from oracle.scoring import attach_scoring, migrate as scoring_migrate
from oracle.summarize import run_summarization
from oracle.render import render as render_site
from oracle.archive import archive as archive_entries
from oracle.themes import scan as theme_scan
from oracle.clickability import fetch_items, compute_index, decay_index
from oracle.recency import filter_fresh
from oracle.dedup import content_hash, compute_verdict, tier_adjusted_score, backfill_hashes, apply_verdicts, get_source_tier


def cmd_ingest(args):
    """Run the ingestion pipeline."""
    import time
    import sqlite3
    import signal

    from adapters import SourceAdapter
    from adapters._store import upsert_entries

    sources = args.sources.split(",") if args.sources else ENABLED_SOURCES
    now = datetime.now(timezone.utc)
    print(f"=== AI Research Oracle Pipeline ===")
    print(f"  Sources: {', '.join(sources)}")
    print(f"  Limit: {args.limit}/source")
    print(f"  Dry run: {args.dry_run}")
    print()

    # Import adapters dynamically
    adapter_modules = {
        "github": "adapters.github",
        "arxiv": "adapters.arxiv",
        "reddit": "adapters.reddit",
        "hackernews": "adapters.hackernews",
        "huggingface": "adapters.huggingface",
        "rss": "adapters.rss_feeds",
    }
    adapter_classes = {
        "github": "GitHubAdapter",
        "arxiv": "ArxivAdapter",
        "reddit": "RedditAdapter",
        "hackernews": "HackerNewsAdapter",
        "huggingface": "HuggingFaceAdapter",
        "rss": "RSSFeedsAdapter",
    }

    db_path = str(DB_PATH)
    schema_path = str(SCHEMA_PATH)

    all_entries = []
    source_stats = {}

    for source_name in sources:
        if source_name not in adapter_modules:
            print(f"  ⚠ Unknown source: {source_name}")
            continue

        print(f"  [{source_name}]")
        mod = __import__(adapter_modules[source_name], fromlist=[adapter_classes[source_name]])
        adapter = getattr(mod, adapter_classes[source_name])()

        # Fetch with per-adapter timeout (prevents blocking on slow endpoints)
        entries = []
        error = None
        try:
            entries = adapter.fetch(limit=args.limit, timeout=10)
        except TypeError:
            # Old adapter signature without timeout param — use thread-based fallback
            import threading
            result = {"entries": [], "error": None}
            def _fetch():
                try:
                    result["entries"] = adapter.fetch(limit=args.limit)
                except Exception as e:
                    result["error"] = str(e)
            t = threading.Thread(target=_fetch, daemon=True)
            t.start()
            t.join(timeout=10)
            if t.is_alive():
                error = f"timeout after 10s"
            else:
                entries = result["entries"]
                error = result["error"]
        except Exception as e:
            error = str(e)

        if error:
            print(f"  ✗ {source_name} failed: {error}")
            source_stats[source_name] = {"fetched": 0, "stored": 0, "error": error}
            continue

        for entry in entries:
            meta = json.loads(entry["raw_metadata"]) if isinstance(entry["raw_metadata"], str) else entry["raw_metadata"]
            meta["adapter_version"] = "1.0"
            entry["raw_metadata"] = json.dumps(meta)

        all_entries.extend(entries)
        source_stats[source_name] = {"fetched": len(entries), "stored": 0}
        print(f"    Fetched: {len(entries)} entries")
        time.sleep(0.5)

    if not args.dry_run and all_entries:
        conn = init_db(db_path, schema_path)
        stored = upsert_entries(conn, all_entries)

        for entry in all_entries:
            src = entry["source"]
            if src in source_stats:
                source_stats[src]["stored"] += 1

        # Score new entries
        try:
            attach_scoring(db_path)
        except Exception as e:
            print(f"  ⚠ scoring attach failed: {e}")

        conn.close()
        print(f"  Total stored: {stored} entries")
    else:
        print(f"  Total fetched: {len(all_entries)} entries (dry run)")

    print(f"\n  Source summary:")
    for src, stats in source_stats.items():
        error = stats.get("error", "")
        error_str = f" ✗ {error}" if error else ""
        print(f"    {src}: {stats['fetched']} fetched, {stats.get('stored', '—')} stored{error_str}")

    if all_entries:
        print(f"\n  Top entries by signal score:")
        sorted_entries = sorted(all_entries, key=lambda e: e["signal_score"], reverse=True)
        for i, entry in enumerate(sorted_entries[:5]):
            print(f"    [{i+1}] {entry['source'].upper():6} score={entry['signal_score']:.2f} {entry['title'][:70]}")

    print(f"\n  Done.")


def cmd_summarize(args):
    """Run the summarization engine."""
    run_summarization(source=args.source, limit=args.limit)


def cmd_query(args):
    """Query the database."""
    conn = get_connection()
    qc = getattr(args, "query_command", None)

    if qc == "top":
        entries = query_top(conn, n=args.n, source=args.source, min_score=args.min_score)
        print(f"Top {len(entries)} entries:")
        _print_entries(entries)

    elif qc == "search":
        entries = query_search(conn, args.query_text, limit=args.limit)
        print(f"Search results for '{args.query_text}':")
        _print_entries(entries)

    elif qc == "recent":
        entries = query_recent(conn, hours=args.hours)
        print(f"Entries from last {args.hours}h:")
        _print_entries(entries)

    elif qc == "by-tag":
        entries = query_by_tag(conn, args.tag, limit=args.limit)
        print(f"Entries tagged '{args.tag}':")
        _print_entries(entries)

    elif qc == "stats":
        stats = get_stats(conn)
        print(f"Database: {DB_PATH}")
        print(f"Total entries: {stats['total_entries']}")
        print(f"Summarized: {stats['summarized']}")
        print(f"Pending summary: {stats['pending_summary']}")
        if stats.get("buckets"):
            print(f"\nBucket distribution:")
            for bucket, count in sorted(stats["buckets"].items(), key=lambda x: -x[1]):
                print(f"  {bucket}: {count}")

    elif qc == "snapshot":
        stats = get_stats(conn)
        top = query_top(conn, n=10)
        print("=" * 70)
        print("AI RESEARCH ORACLE — SNAPSHOT")
        print("=" * 70)
        print(f"Time: {datetime.now(timezone.utc).strftime('%Y-%m-%dT%H:%M:%SZ')}")
        print(f"Total entries: {stats['total_entries']}")
        print()
        print("Source breakdown:")
        for src, s in stats["sources"].items():
            print(f"  {src}: {s['cnt']} entries, avg score {s['avg_score']}")
        print()
        print("Top 10 by signal score:")
        _print_entries(top)

    conn.close()


def _print_entries(entries):
    """Pretty-print a list of entries."""
    if not entries:
        print("  (no results)")
        return
    for i, e in enumerate(entries, 1):
        summary = json.loads(e["summary"]) if e.get("summary") else {}
        meta = json.loads(e["raw_metadata"]) if e.get("raw_metadata") else {}
        print(f"  [{i}] {e['source'].upper():10} | score={e['signal_score']:.2f}")
        print(f"      {e['title'][:80]}")
        if summary.get("one_liner"):
            print(f"      → {summary['one_liner'][:100]}")
        print()


def cmd_render(args):
    """Render static site — single variant or all variants."""
    from oracle.variants import load_variant, list_variants, render_variant

    if args.list:
        print("Available variants:")
        for v in list_variants():
            print(f"  {v}")
        return

    if args.all_variants:
        variants = list_variants()
        if not variants:
            print("No variants found in variants/")
            return
        print(f"=== Rendering all {len(variants)} variants ===\n")
        for vname in variants:
            try:
                config = load_variant(vname)
                render_variant(config, dry_run=args.dry_run, webroot=args.webroot)
            except Exception as e:
                print(f"[variant:{vname}] ERROR: {e}")
            print()
        return

    # Single variant (default = 'default' if not specified)
    vname = args.variant or "default"
    try:
        config = load_variant(vname)
        render_variant(config, dry_run=args.dry_run, webroot=args.webroot)
    except FileNotFoundError as e:
        print(f"Error: {e}")


def cmd_archive(args):
    """Archive old entries."""
    archive_entries(days=args.days, cap=args.cap, dry_run=args.dry_run)


def cmd_themes(args):
    """Run theme scan."""
    results = theme_scan(history=args.history)
    print(f"=== Theme trend scan ===")
    print(f"  Fresh entries this cycle: {results['fresh_count']}")
    if results["new_arrivals"]:
        print("  NEW theme arrivals this cycle:")
        for theme, count in results["new_arrivals"].items():
            print(f"    {theme}: +{count}")
    else:
        print("  NEW theme arrivals this cycle: 0")
    print(f"  Cumulative totals: {results['cumulative']}")

    if args.history and results.get("history"):
        print("\n  Per-cycle history:")
        for day, theme, count in results["history"]:
            print(f"    {day}  {theme}: {count}")


def cmd_dedup(args):
    """World Monitor migration: tiers, hashes, verdicts."""
    print("=== World Monitor Migration ===\n")

    conn = get_connection()

    # Show source tier config
    if args.show_tiers:
        print("Source tier configuration:")
        for src, info in SOURCE_TIERS.items():
            print(f"  {src:12} Tier {info['tier']} ({info['label']}) - {info['description']}")
        print()

    # Show verdict thresholds
    if args.show_verdicts:
        print("Verdict thresholds:")
        for verdict, thresholds in VERDICT_THRESHOLDS.items():
            print(f"  {verdict:8} score >= {thresholds['min_score']}, age <= {thresholds['max_age_h']}h")
        print()

    # Run migration
    if args.migrate:
        print("Running schema migration + backfill...\n")
        result = migrate_world_monitor(conn)
        print(f"  Columns added:       {result['columns_added']}")
        print(f"  Hashes backfilled:   {result['hashes_backfilled']}")
        print(f"  Verdicts set:        {result['verdicts_set']}")
        print()

    # Show verdict distribution
    cur = conn.cursor()
    try:
        cur.execute("PRAGMA table_info(entries)")
        columns = {r[1] for r in cur.fetchall()}
    except Exception:
        conn.close()
        return

    if "verdict" in columns:
        cur.execute("SELECT verdict, COUNT(*) as cnt FROM entries WHERE verdict != '' GROUP BY verdict ORDER BY cnt DESC")
        rows = cur.fetchall()
        if rows:
            print("Verdict distribution:")
            for r in rows:
                print(f"  {r['verdict']:8} {r['cnt']}")
        print()

    if "content_hash" in columns:
        cur.execute("SELECT COUNT(*) FROM entries WHERE content_hash != '' AND content_hash IS NOT NULL")
        hashed = cur.fetchone()[0]
        cur.execute("SELECT COUNT(*) FROM entries")
        total = cur.fetchone()[0]
        print(f"Content hashes: {hashed}/{total} entries hashed")

    if "source_tier" in columns:
        cur.execute("SELECT source_tier, COUNT(*) as cnt FROM entries GROUP BY source_tier ORDER BY source_tier")
        rows = cur.fetchall()
        if rows:
            print(f"\nSource tier distribution:")
            for r in rows:
                print(f"  Tier {r['source_tier']}: {r['cnt']}")

    conn.close()
    print()


def cmd_brief(args):
    """Generate morning intelligence briefing."""
    from oracle.brief import generate_brief, generate_brief_json, get_connection

    db = args.db or str(DB_PATH)
    conn = get_connection(db)
    try:
        brief = generate_brief_json(conn, max_items=args.max_items, max_age_h=args.max_age_h)
        if args.json:
            import json as _json
            print(_json.dumps(brief, indent=2, default=str))
        elif args.output:
            generate_brief(conn, max_items=args.max_items, max_age_h=args.max_age_h, output_path=args.output)
            print(f"Saved: {args.output}")
        else:
            print(brief.get("markdown", brief.get("error", "No brief generated")))
    finally:
        conn.close()


def cmd_weekly(args):
    """Generate weekly review."""
    from oracle.weekly import generate_weekly, get_connection

    db = args.db or str(DB_PATH)
    conn = get_connection(db)
    try:
        review = generate_weekly(conn, days=args.days)
        if args.json:
            import json as _json
            print(_json.dumps({k: v for k, v in review.items() if k != "markdown"}, indent=2, default=str))
        elif args.output:
            generate_weekly(conn, days=args.days, output_path=args.output)
            print(f"Saved: {args.output}")
        else:
            print(review.get("markdown", "No review generated"))
    finally:
        conn.close()


def cmd_health(args):
    """System health check."""
    print("=== System Health Check ===\n")

    # Database
    try:
        conn = get_connection()
        stats = get_stats(conn)
        conn.close()
        print(f"✓ Database: {DB_PATH}")
        print(f"  Total entries: {stats['total_entries']}")
        print(f"  Summarized: {stats['summarized']}")
        print(f"  Pending: {stats['pending_summary']}")
    except Exception as e:
        print(f"✗ Database error: {e}")

    # Schema columns
    try:
        conn = get_connection()
        cur = conn.cursor()
        cur.execute("PRAGMA table_info(entries)")
        columns = [r[1] for r in cur.fetchall()]
        conn.close()
        print(f"  Schema columns: {len(columns)}")
    except Exception as e:
        print(f"  Schema check: {e}")

    # Run log
    try:
        conn = get_connection()
        cur = conn.cursor()
        cur.execute("SELECT COUNT(*) FROM run_log")
        runs = cur.fetchone()[0]
        cur.execute("SELECT run_time, failure_class FROM run_log ORDER BY id DESC LIMIT 3")
        recent = cur.fetchall()
        conn.close()
        print(f"  Pipeline runs logged: {runs}")
        for r in recent:
            print(f"    {r[0]}  class={r[1]}")
    except Exception as e:
        print(f"  Run log: {e}")

    print()


def main():
    parser = argparse.ArgumentParser(
        description="AI Research Oracle — Unified CLI",
        formatter_class=argparse.RawDescriptionHelpFormatter,
    )
    sub = parser.add_subparsers(dest="command", help="Available commands")

    # ingest
    p_ingest = sub.add_parser("ingest", help="Run the ingestion pipeline")
    p_ingest.add_argument("--sources", default=None, help="Comma-separated sources")
    p_ingest.add_argument("--limit", type=int, default=DEFAULT_LIMIT, help="Entries per source")
    p_ingest.add_argument("--dry-run", action="store_true", help="Fetch but don't store")

    # summarize
    p_summarize = sub.add_parser("summarize", help="Generate summaries")
    p_summarize.add_argument("--source", default=None, help="Filter by source")
    p_summarize.add_argument("--limit", type=int, default=0, help="Max entries (0=all)")

    # query (nested subcommands)
    p_query = sub.add_parser("query", help="Query the database")
    query_sub = p_query.add_subparsers(dest="query_command")

    p_top = query_sub.add_parser("top", help="Top N entries")
    p_top.add_argument("n", type=int, nargs="?", default=10)
    p_top.add_argument("--source", default=None)
    p_top.add_argument("--min-score", type=float, default=0)

    p_search = query_sub.add_parser("search", help="Keyword search")
    p_search.add_argument("query_text")
    p_search.add_argument("--limit", type=int, default=20)

    p_recent = query_sub.add_parser("recent", help="Recent entries")
    p_recent.add_argument("--hours", type=int, default=24)

    p_tag = query_sub.add_parser("by-tag", help="Entries by tag")
    p_tag.add_argument("tag")
    p_tag.add_argument("--limit", type=int, default=20)

    query_sub.add_parser("stats", help="Database statistics")
    query_sub.add_parser("snapshot", help="Full snapshot")

    # render
    p_render = sub.add_parser("render", help="Render static site")
    p_render.add_argument("--variant", default=None, help="Variant name (default, research, devops, brief)")
    p_render.add_argument("--all", dest="all_variants", action="store_true", help="Render all variants")
    p_render.add_argument("--list", action="store_true", help="List available variants")
    p_render.add_argument("--dry-run", action="store_true")
    p_render.add_argument("--webroot", default=None, help="Output directory")

    # archive
    p_archive = sub.add_parser("archive", help="Archive old entries")
    p_archive.add_argument("--days", type=int, default=30)
    p_archive.add_argument("--cap", type=int, default=5000)
    p_archive.add_argument("--dry-run", action="store_true")

    # themes
    p_themes = sub.add_parser("themes", help="Theme trend tracking")
    p_themes.add_argument("--history", action="store_true")

    # dedup (World Monitor migration)
    p_dedup = sub.add_parser("dedup", help="World Monitor: tiers, hashes, verdicts")
    p_dedup.add_argument("--migrate", action="store_true", help="Run schema migration + backfill")
    p_dedup.add_argument("--show-tiers", action="store_true", help="Show source tier config")
    p_dedup.add_argument("--show-verdicts", action="store_true", help="Show verdict thresholds")

    # brief
    p_brief = sub.add_parser("brief", help="Generate morning intelligence briefing")
    p_brief.add_argument("--db", default=None, help="Database path")
    p_brief.add_argument("--max-items", type=int, default=8, help="Max items in brief")
    p_brief.add_argument("--max-age-h", type=float, default=48, help="Max age in hours")
    p_brief.add_argument("--output", "-o", help="Output path for markdown brief")
    p_brief.add_argument("--json", action="store_true", help="Output as JSON")

    # weekly
    p_weekly = sub.add_parser("weekly", help="Generate weekly review")
    p_weekly.add_argument("--db", default=None, help="Database path")
    p_weekly.add_argument("--days", type=int, default=7, help="Days to review")
    p_weekly.add_argument("--output", "-o", help="Output path for markdown review")
    p_weekly.add_argument("--json", action="store_true", help="Output as JSON")

    # metrics
    p_metrics = subparsers.add_parser("metrics", help="Pipeline metrics and adapter health")
    p_metrics.add_argument("--db", default="oracle.db")
    p_metrics.add_argument("--days", type=int, default=7)
    p_metrics.add_argument("--adapters", action="store_true", help="Show adapter health table")
    p_metrics.add_argument("--publish", action="store_true", help="Show PUBLISH rate trend")
    p_metrics.add_argument("--scores", action="store_true", help="Show score distribution")
    p_metrics.add_argument("--alerts", action="store_true", help="Show current alerts")
    p_metrics.add_argument("--all", action="store_true", help="Show everything")
    p_metrics.add_argument("--json", action="store_true", help="Output as JSON")
    sub.add_parser("health", help="System health check")

    args = parser.parse_args()

    commands = {
        "ingest": cmd_ingest,
        "summarize": cmd_summarize,
        "query": cmd_query,
        "render": cmd_render,
        "archive": cmd_archive,
        "themes": cmd_themes,
        "dedup": cmd_dedup,
        "brief": cmd_brief,
        "weekly": cmd_weekly,
        "health": cmd_health,
    }

    if args.command and args.command in commands:
        commands[args.command](args)
    else:
        parser.print_help()


if __name__ == "__main__":
    main()