# ============================================
# 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 scraper.logger import log_debug
from scraper.abort import set_abort
from scraper.ui_log import get_ui_logs, reset_ui_logs, get_ui_logs_delta
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 []

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

    return render_template(
        "dashboard/dashboard.html",
        books=list_active_books(),  # Redis
        registered=reg,  # SQLite (filtered)
        logs=logs_list,
    )


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


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


@app.route("/init", methods=["POST"])
@logcall
def init_book():
    """
    INIT-flow:
    - user enters URL
    - metadata fetch
    - insert into SQLite as 'registered'
    - return dashboard
    """
    url = request.form.get("url", "").strip()

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

    try:
        result = InitService.execute(url)
        msg = f"Boek geregistreerd: {result.get('title')}"

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

        return render_template(
            "dashboard/dashboard.html",
            message=msg,
            books=list_active_books(),
            registered=reg,
            logs=get_ui_logs(),
        )

    except Exception as e:
        log_debug(f"[INIT] ERROR: {e}")
        reg = [b for b in get_registered_books() if b.get("status") != "hidden"]
        return render_template(
            "dashboard/dashboard.html",
            error=f"INIT mislukt: {e}",
            books=list_active_books(),
            registered=reg,
            logs=get_ui_logs(),
        )


@app.route("/hide/<book_id>", methods=["POST"])
@logcall
def hide_registered_book(book_id):
    """
    Soft-delete/hide voor GUI.
    De DB blijft intact.
    """
    # try:
    #     hide_book(book_id)
    #     return redirect("/dashboard")
    #     # return jsonify({"status": "ok", "hidden": book_id})
    # except Exception as e:
    #     return jsonify({"status": "error", "message": str(e)}), 500


@app.route("/start", methods=["POST"])
@logcall
def start_scraping():
    """
    Start FULL scraping vanuit een geregistreerd INIT-record.
    """
    book_id = request.form.get("book_id")
    if not book_id:
        return jsonify({"status": "error", "message": "book_id ontbreekt"}), 400

    book = fetch_book(book_id)
    if not book:
        return jsonify({"status": "error", "message": "Boek niet gevonden"}), 404

    url = book.get("book_url")
    if not url:
        return jsonify({"status": "error", "message": "book_url ontbreekt"}), 500

    reset_ui_logs()
    log_debug(f"[WEB] Starting FULL scrape for book_id={book_id}, url={url}")

    async_result = celery_app.send_task(
        "scraper.tasks.scraping.start_scrape_book",
        args=[url],
        queue="scraping",
    )

    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_id>", methods=["POST"])
@logcall
def abort_download(book_id):
    log_debug(f"[WEB] Abort requested for book: {book_id}")
    set_abort(book_id)
    return jsonify({"status": "ok", "aborted": book_id})


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


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


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


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


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


@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():
    # LAST_LOG_INDEX vanuit de client (default = -1 bij eerste call)
    try:
        last_index = int(request.args.get("last_index", -1))
    except:
        last_index = -1

    # Haal volledige huidige loglijst op
    all_logs = get_ui_logs() or []

    # Delta: alle regels met index > last_index
    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():
    """
    Shows:
      - raw SQLite values,
      - raw Redis values,
      - what the merged result WOULD be.
    No writes happen.
    """
    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
import os
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 connection ----
    redis_url = os.getenv("REDIS_BROKER")
    parsed = urlparse(redis_url)

    r = 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": r.llen(key),
                    "items": r.lrange(key, 0, 30),  # first 30 entries
                }
            )
        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_id):
    state = r.hgetall(f"book:{book_id}: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_id

    return {
        "book_id": book_id,
        "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_id = key[first + 1 : second]
        books.append(getStatus(book_id))
    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)