# ============================================
# File: bookscraper/app.py  (ASYNC SCRAPING)
# ============================================

from dotenv import load_dotenv

load_dotenv()

print(">>> [WEB] Importing celery_app …")
from celery_app import celery_app

from flask import Flask, render_template, request, jsonify
from scraper.logger import log_debug

# Abort + Progress (per book_id)
from scraper.abort import set_abort
from scraper.progress import get_progress

# UI LOGS (GLOBAL — no book_id)
from scraper.ui_log import get_ui_logs, reset_ui_logs

from celery.result import AsyncResult
from scraper.state import state as r

# Cover serving
from flask import send_from_directory
import os

import redis

# Flask
app = Flask(__name__)

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


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


# =====================================================
# HOME PAGE
# =====================================================
@app.route("/", methods=["GET"])
def index():
    return render_template("index.html")


# =====================================================
# START SCRAPING (async via Celery)
# =====================================================
@app.route("/start", methods=["POST"])
def start_scraping():
    url = request.form.get("url", "").strip()

    if not url:
        # ★ FIX: dashboard moet altijd books + logs meekrijgen
        return render_template(
            "dashboard/dashboard.html",
            error="Geen URL opgegeven.",
            books=list_active_books(),
            logs=get_ui_logs(),
        )

    reset_ui_logs()
    log_debug(f"[WEB] Scraping via Celery: {url}")

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

    # ★ FIX: direct dashboard tonen met actuele data
    return render_template(
        "dashboard/dashboard.html",
        scraping_task_id=async_result.id,
        books=list_active_books(),
        logs=get_ui_logs(),
    )


# =====================================================
# CLEAR UI LOGS
# =====================================================
@app.route("/clear-logs", methods=["POST"])
def clear_logs():
    reset_ui_logs()
    return jsonify({"status": "ok", "message": "UI logs cleared"})


# =====================================================
# ABORT (per book_id)
# =====================================================
@app.route("/abort/<book_id>", methods=["POST"])
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})


# =====================================================
# PROGRESS (per book_id)
# =====================================================
@app.route("/progress/<book_id>", methods=["GET"])
def progress(book_id):
    return jsonify(get_progress(book_id))


# =====================================================
# LOGS — GLOBAL UI LOGS
# =====================================================
@app.route("/logs", methods=["GET"])
def logs():
    return jsonify({"logs": get_ui_logs()})


# =====================================================
# CELERY RESULT → return book_id
# =====================================================
@app.route("/celery-result/<task_id>", methods=["GET"])
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})


# =====================================================
# REDIS BACKEND — BOOK STATE MODEL
# =====================================================
REDIS_URL = os.getenv("REDIS_BROKER", "redis://redis:6379/0")
r = redis.Redis.from_url(REDIS_URL, decode_responses=True)


def list_active_books():
    """Return list of active books from Redis Book State Model."""
    keys = r.keys("book:*:status")
    books = []

    for key in keys:
        book_id = key.split(":")[1]
        status = r.get(f"book:{book_id}:status") or "unknown"
        title = r.get(f"book:{book_id}:title") or book_id

        dl_done = int(r.get(f"book:{book_id}:download:done") or 0)
        dl_total = int(r.get(f"book:{book_id}:download:total") or 0)
        au_done = int(r.get(f"book:{book_id}:audio:done") or 0)
        au_total = dl_total

        books.append(
            {
                "book_id": book_id,
                "title": title,
                "status": status,
                "download_done": dl_done,
                "download_total": dl_total,
                "audio_done": au_done,
                "audio_total": au_total,
            }
        )

    return books


# =====================================================
# API: list all active books
# =====================================================
@app.route("/api/books")
def api_books():
    return jsonify(list_active_books())


# =====================================================
# API: book status
# =====================================================
@app.route("/api/book/<book_id>/status")
def api_book_status(book_id):
    status = r.get(f"book:{book_id}:status") or "unknown"
    dl_done = int(r.get(f"book:{book_id}:download:done") or 0)
    dl_total = int(r.get(f"book:{book_id}:download:total") or 0)
    au_done = int(r.get(f"book:{book_id}:audio:done") or 0)
    au_total = dl_total

    return jsonify(
        {
            "book_id": book_id,
            "status": status,
            "download_done": dl_done,
            "download_total": dl_total,
            "audio_done": au_done,
            "audio_total": au_total,
        }
    )


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


# =====================================================
# VIEW: DASHBOARD
# =====================================================
@app.route("/dashboard")
def dashboard():
    # ★ FIX: dashboard moet altijd books + logs krijgen
    return render_template(
        "dashboard/dashboard.html",
        books=list_active_books(),
        logs=get_ui_logs(),
    )


# =====================================================
# VIEW: BOOK DETAIL PAGE
# =====================================================
@app.route("/book/<book_id>")
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(),
    )


@app.route("/debug/redis-keys")
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)


# =====================================================
# RUN FLASK
# =====================================================
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)