# ============================================
# File: bookscraper/app.py  (ASYNC SCRAPING)
# ============================================
from dotenv import load_dotenv

load_dotenv()

import os
from flask import (
    Flask,
    render_template,
    request,
    jsonify,
    send_from_directory,
    redirect,
    url_for,
)

print(">>> [WEB] Importing celery_app …")
from celery_app import celery_app
from celery.result import AsyncResult

from db.db import init_db
from db.repository import (
    get_registered_books,
    fetch_book,
    fetch_all_books,
    get_progress,
)

from logbus.publisher import log
from scraper.logger import log_debug
from scraper.abort import set_abort
from scraper.ui_log import get_ui_logs, reset_ui_logs
from scraper.state import state as r
from scraper.logger_decorators import logcall
from scraper.utils.state_sync import sync_books_from_redis
from scraper.services.init_service import InitService


# INIT DB
init_db()

app = Flask(__name__)

# =====================================================
# STATIC FILE SERVING
# =====================================================
OUTPUT_ROOT = os.getenv("BOOKSCRAPER_OUTPUT_DIR", "output")


@app.route("/output/<path:filename>")
@logcall
def serve_output(filename):
    return send_from_directory(OUTPUT_ROOT, filename, as_attachment=False)


# =====================================================
# SECTION 1 — NAVIGATION / HTML PAGES
# =====================================================


@app.route("/", methods=["GET"])
@logcall
def index():
    return redirect(url_for("dashboard"))


@app.route("/dashboard", methods=["GET"])
@logcall
def dashboard():
    logs_list = get_ui_logs() or []
    registered_books = get_registered_books()
    log(f"[WEB] Registered books: {registered_books}")
    from db.repository import fetch_all_books
    from pprint import pprint

    pprint(fetch_all_books())
    pprint(get_registered_books())

    # reg = [b for b in get_registered_books() if b.get("status") != "hidden"]

    return render_template(
        "dashboard/dashboard.html",
        books=list_active_books(),
        registered=registered_books,
        logs=logs_list,
    )


@app.route("/book/<book_idx>")
@logcall
def book_detail(book_idx):
    title = r.get(f"book:{book_idx}:title") or book_idx
    return render_template(
        "dashboard/book_detail.html",
        book_id=book_idx,
        title=title,
        logs=get_ui_logs(),
    )


# =====================================================
# SECTION 2 — ACTION ROUTES (INIT, START, ABORT, HIDE)
# =====================================================


@app.route("/init", methods=["POST"])
@logcall
def init_book():
    # -------------------------------------------------
    # Accept single URL (legacy) OR multi-line URLs
    # -------------------------------------------------
    raw_urls = request.form.get("urls") or request.form.get("url") or ""

    urls = [line.strip() for line in raw_urls.splitlines() if line.strip()]

    if not urls:
        return render_template(
            "dashboard/dashboard.html",
            error="Geen URL(s) opgegeven.",
            books=list_active_books(),
            registered=get_registered_books(),
            logs=get_ui_logs(),
        )

    # -------------------------------------------------
    # Duplicate check: existing book_ids
    # -------------------------------------------------
    existing_books = {b["book_idx"] for b in fetch_all_books()}
    results = []

    # -------------------------------------------------
    # Process each URL independently
    # -------------------------------------------------
    for url in urls:
        try:
            book_id = InitService.derive_book_id(url)

            if book_id in existing_books:
                results.append(
                    {
                        "url": url,
                        "status": "skipped",
                        "book_id": book_id,
                        "message": "Al geregistreerd",
                    }
                )
                continue

            result = InitService.execute(url)

            results.append(
                {
                    "url": url,
                    "status": "registered",
                    "book_id": result.get("book_id"),
                    "title": result.get("title"),
                }
            )

        except Exception as e:
            log_debug(f"[INIT] ERROR for url={url}: {e}")
            results.append(
                {
                    "url": url,
                    "status": "error",
                    "error": str(e),
                }
            )

    # -------------------------------------------------
    # Summary message
    # -------------------------------------------------
    ok = sum(1 for r in results if r["status"] == "registered")
    skipped = sum(1 for r in results if r["status"] == "skipped")
    failed = sum(1 for r in results if r["status"] == "error")

    message = f"Geregistreerd: {ok}, overgeslagen: {skipped}, fouten: {failed}"

    reg = [b for b in get_registered_books() if b.get("status") != "hidden"]

    return render_template(
        "dashboard/dashboard.html",
        message=message,
        init_results=results,  # optioneel voor UI-weergave
        books=list_active_books(),
        registered=reg,
        logs=get_ui_logs(),
    )


@app.route("/hide/<book_idx>", methods=["POST"])
@logcall
def hide_registered_book(book_idx):
    # intentionally left disabled
    pass


@app.route("/start", methods=["POST"])
@logcall
def start_scraping():
    # 1) Form field: book_idx
    book_idx = request.form.get("book_idx")
    log(f"[WEB][START] Received start request for book_idx={book_idx}")
    if not book_idx:
        msg = "book_idx ontbreekt in formulier"
        log(f"[WEB][START] ERROR: {msg}")
        return jsonify({"status": "error", "message": msg}), 400

    # 2) Fetch boek uit SQLite
    try:
        book = fetch_book(book_idx)
        log(f"[WEB][START] Fetched book from DB: {book}")
    except Exception as e:
        log(f"[WEB][START] DB ERROR: {e}")
        return jsonify({"status": "error", "message": "DB fout"}), 500

    if not book:
        msg = f"Boek '{book_idx}' niet gevonden in DB"
        log(f"[WEB][START] ERROR: {msg}")
        return jsonify({"status": "error", "message": msg}), 404

    # 3) Boek moet een URL hebben
    url = book.get("book_url")
    if not url:
        msg = f"Boek '{book_idx}' heeft geen book_url in DB"
        log(f"[WEB][START] ERROR: {msg}")
        return jsonify({"status": "error", "message": msg}), 500

    # 4) Reset UI logs
    reset_ui_logs()

    # 5) Logging
    log(f"[WEB][START] Starting full scrape book_idx={book_idx}, url={url}")
    log_debug(f"[WEB][START] DEBUG: book data = {book}")

    # 6) Celery controller taak starten
    try:
        async_result = celery_app.send_task(
            "scraper.tasks.controller_tasks.start_full_scrape",
            args=[book_idx],
            queue="controller",
        )
    except Exception as e:
        log(f"[WEB][START] Celery ERROR: {e}")
        return jsonify({"status": "error", "message": f"Celery fout: {e}"}), 500

    # 7) Successfully dispatched task
    log(f"[WEB][START] Task dispatched: {async_result.id}")

    reg = [b for b in get_registered_books() if b.get("status") != "hidden"]

    return render_template(
        "dashboard/dashboard.html",
        scraping_task_id=async_result.id,
        books=list_active_books(),
        registered=reg,
        logs=get_ui_logs(),
    )


@app.route("/abort/<book_idx>", methods=["POST"])
@logcall
def abort_download(book_idx):
    log_debug(f"[WEB] Abort requested for book: {book_idx}")
    set_abort(book_idx)
    return jsonify({"status": "ok", "aborted": book_idx})


# =====================================================
# SECTION 3 — API ROUTES (JSON)
# =====================================================


@app.route("/api/state/all", methods=["GET"])
@logcall
def api_state_all():
    """
    Returns the merged SQL + Redis state for all books
    (same logic as /debug/inspect_state but JSON-only).
    """
    from scraper.utils.state_sync import inspect_books_state

    return jsonify(inspect_books_state())


@app.route("/api/books")
@logcall
def api_books():
    return jsonify(list_active_books())


@app.route("/api/book/<book_idx>/status")
@logcall
def api_book_status(book_idx):
    return jsonify(getStatus(book_idx))


@app.route("/api/book/<book_idx>/logs")
@logcall
def api_book_logs(book_idx):
    logs = r.lrange(f"logs:{book_idx}", 0, -1) or []
    return jsonify(logs)


@app.route("/progress/<book_idx>")
@logcall
def progress(book_idx):
    return jsonify(get_progress(book_idx))


@app.route("/celery-result/<task_id>")
@logcall
def celery_result(task_id):
    result = AsyncResult(task_id, app=celery_app)
    if result.successful():
        return jsonify({"ready": True, "result": result.get()})
    if result.failed():
        return jsonify({"ready": True, "error": "failed"})
    return jsonify({"ready": False})


@app.route("/clear-logs", methods=["POST"])
@logcall
def clear_logs():
    reset_ui_logs()
    return jsonify({"status": "ok"})


@app.route("/logs", methods=["GET"])
@logcall
def logs():
    try:
        last_index = int(request.args.get("last_index", -1))
    except:
        last_index = -1

    all_logs = get_ui_logs() or []

    new_lines = []
    new_last = last_index

    for idx, line in enumerate(all_logs):
        if idx > last_index:
            new_lines.append(line)
            new_last = idx

    return jsonify({"lines": new_lines, "last": new_last})


# =====================================================
# SECTION 4 — DEBUG ROUTES
# =====================================================


@app.route("/debug/sync_state", methods=["GET"])
def debug_sync_state():
    results = sync_books_from_redis()
    return {"status": "ok", "synced": results}


from scraper.utils.state_sync import inspect_books_state


@app.route("/debug/inspect_state", methods=["GET"])
def debug_inspect_state():
    results = inspect_books_state()
    return render_template("debug/inspect_state.html", results=results)


@app.route("/debug/redis-keys")
@logcall
def debug_redis_keys():
    cursor = 0
    results = {}
    while True:
        cursor, keys = r.scan(cursor, match="*", count=200)
        for k in keys:
            try:
                results[k] = r.get(k)
            except:
                results[k] = "<non-string value>"
        if cursor == 0:
            break
    return jsonify(results)


# =====================================================
# DB DEBUG
# =====================================================


@app.route("/api/db/books")
@logcall
def api_db_books():
    try:
        books = fetch_all_books()
        return jsonify({"status": "ok", "books": books})
    except Exception as e:
        return jsonify({"status": "error", "message": str(e)}), 500


# =============================================
# DEBUG QUEUE VIEW (HTML)
# =============================================

from flask import render_template
from urllib.parse import urlparse
import redis
from celery_app import celery_app


@app.route("/debug/queues")
def debug_queues():
    insp = celery_app.control.inspect()

    workers_active = insp.active() or {}
    workers_scheduled = insp.scheduled() or {}
    workers_reserved = insp.reserved() or {}

    redis_url = os.getenv("REDIS_BROKER")
    parsed = urlparse(redis_url)

    r2 = redis.Redis(
        host=parsed.hostname,
        port=parsed.port,
        db=int(parsed.path.strip("/") or 0),
        decode_responses=True,
    )

    queue_names = ["scraping", "controller", "download", "parse", "save", "audio"]

    queues = []
    for q in queue_names:
        key = f"celery:{q}"
        try:
            queues.append(
                {
                    "name": q,
                    "redis_key": key,
                    "length": r2.llen(key),
                    "items": r2.lrange(key, 0, 30),
                }
            )
        except Exception as e:
            queues.append(
                {
                    "name": q,
                    "redis_key": key,
                    "length": "ERR",
                    "items": [str(e)],
                }
            )

    return render_template(
        "debug/queues.html",
        queues=queues,
        workers_active=workers_active,
        workers_reserved=workers_reserved,
        workers_scheduled=workers_scheduled,
    )


# =====================================================
# SECTION 5 — INTERNAL HELPERS
# =====================================================


@logcall
def getStatus(book_idx):
    state = r.hgetall(f"book:{book_idx}:state")
    status = state.get("status") or "unknown"
    dl_done = int(state.get("chapters_download_done", 0))
    dl_skipped = int(state.get("chapters_download_skipped", 0))
    dl_total = int(state.get("chapters_total", 0))
    au_done = int(state.get("audio_done") or 0)
    title = state.get("title") or book_idx

    return {
        "book_id": book_idx,
        "title": title,
        "status": status,
        "download_done": dl_done,
        "download_skipped": dl_skipped,
        "download_total": dl_total,
        "audio_done": au_done,
        "audio_total": dl_total,
    }


@logcall
def list_active_books():
    books = []
    for key in r.scan_iter(match="book:*:state", count=1000):
        first = key.find(":")
        second = key.find(":", first + 1)
        book_idx = key[first + 1 : second]
        books.append(getStatus(book_idx))
    return books


# =====================================================
# SECTION 6 — FLASK RUNNER
# =====================================================

if __name__ == "__main__":
    debug = os.getenv("FLASK_DEBUG", "0") == "1"
    host = os.getenv("HOST", "0.0.0.0")
    port = int(os.getenv("PORT", "5000"))

    log_debug(f"[WEB] Starting Flask server on {host}:{port}, debug={debug}")
    app.run(host=host, port=port, debug=debug)