import os
import json
import shutil
from datetime import datetime
from flask import Blueprint, render_template, request, redirect, url_for, flash
from flask_login import login_required, current_user
from web.db import db, Project, Run
from web.helpers import is_project_locked
from core import config, utils
from ai import models as ai_models
from ai import setup as ai_setup
from story import planner, bible_tracker
from web.tasks import generate_book_task, refine_bible_task

project_bp = Blueprint('project', __name__)


@project_bp.route('/')
@login_required
def index():
    projects = Project.query.filter_by(user_id=current_user.id).all()
    return render_template('dashboard.html', projects=projects, user=current_user)


@project_bp.route('/project/setup', methods=['POST'])
@login_required
def project_setup_wizard():
    concept = request.form.get('concept')

    try: ai_setup.init_models()
    except: pass

    if not ai_models.model_logic:
        flash("AI models not initialized.")
        return redirect(url_for('project.index'))

    prompt = f"""
    ROLE: Publishing Analyst
    TASK: Suggest metadata for a story concept.

    CONCEPT: {concept}

    OUTPUT_FORMAT (JSON):
    {{
        "title": "String",
        "genre": "String",
        "target_audience": "String",
        "tone": "String",
        "length_category": "String (Select code: '01'=Chapter Book, '1'=Flash Fiction, '2'=Short Story, '2b'=Young Adult, '3'=Novella, '4'=Novel, '5'=Epic)",
        "estimated_chapters": Int,
        "estimated_word_count": "String (e.g. '75,000')",
        "include_prologue": Bool,
        "include_epilogue": Bool,
        "tropes": ["String"],
        "pov_style": "String",
        "time_period": "String",
        "spice": "String",
        "violence": "String",
        "is_series": Bool,
        "series_title": "String",
        "narrative_tense": "String",
        "language_style": "String",
        "dialogue_style": "String",
        "page_orientation": "Portrait|Landscape|Square",
        "formatting_rules": ["String (e.g. 'Chapter Headers: Number + Title')"],
        "author_bio": "String"
    }}
    """

    suggestions = {}
    try:
        response = ai_models.model_logic.generate_content(prompt)
        suggestions = json.loads(utils.clean_json(response.text))
    except Exception as e:
        flash(f"AI Analysis failed: {e}")
        suggestions = {"title": "New Project", "genre": "Fiction"}

    personas = {}
    if os.path.exists(config.PERSONAS_FILE):
        try:
            with open(config.PERSONAS_FILE, 'r') as f: personas = json.load(f)
        except: pass

    return render_template('project_setup.html', s=suggestions, concept=concept, personas=personas, lengths=config.LENGTH_DEFINITIONS)


@project_bp.route('/project/setup/refine', methods=['POST'])
@login_required
def project_setup_refine():
    concept = request.form.get('concept')
    instruction = request.form.get('refine_instruction')

    current_state = {
        "title": request.form.get('title'),
        "genre": request.form.get('genre'),
        "target_audience": request.form.get('audience'),
        "tone": request.form.get('tone'),
    }

    try: ai_setup.init_models()
    except: pass

    prompt = f"""
    ROLE: Publishing Analyst
    TASK: Refine project metadata based on user instruction.

    INPUT_DATA:
    - ORIGINAL_CONCEPT: {concept}
    - CURRENT_TITLE: {current_state['title']}
    - INSTRUCTION: {instruction}

    OUTPUT_FORMAT (JSON): Same structure as the initial analysis (title, genre, length_category, etc). Ensure length_category matches the word count.
    """

    suggestions = {}
    try:
        response = ai_models.model_logic.generate_content(prompt)
        suggestions = json.loads(utils.clean_json(response.text))
    except Exception as e:
        flash(f"Refinement failed: {e}")
        return redirect(url_for('project.index'))

    personas = {}
    if os.path.exists(config.PERSONAS_FILE):
        try:
            with open(config.PERSONAS_FILE, 'r') as f: personas = json.load(f)
        except: pass

    return render_template('project_setup.html', s=suggestions, concept=concept, personas=personas, lengths=config.LENGTH_DEFINITIONS)


@project_bp.route('/project/create', methods=['POST'])
@login_required
def create_project_final():
    title = request.form.get('title')
    safe_title = utils.sanitize_filename(title)

    user_dir = os.path.join(config.DATA_DIR, "users", str(current_user.id))
    os.makedirs(user_dir, exist_ok=True)

    proj_path = os.path.join(user_dir, safe_title)
    if os.path.exists(proj_path):
        safe_title += f"_{int(datetime.utcnow().timestamp())}"
        proj_path = os.path.join(user_dir, safe_title)
    os.makedirs(proj_path, exist_ok=True)

    length_cat = request.form.get('length_category')
    len_def = config.LENGTH_DEFINITIONS.get(length_cat, config.LENGTH_DEFINITIONS['4']).copy()

    try: len_def['chapters'] = int(request.form.get('chapters'))
    except: pass
    len_def['words'] = request.form.get('words')
    len_def['include_prologue'] = 'include_prologue' in request.form
    len_def['include_epilogue'] = 'include_epilogue' in request.form

    is_series = 'is_series' in request.form

    style = {
        "tone": request.form.get('tone'),
        "pov_style": request.form.get('pov_style'),
        "time_period": request.form.get('time_period'),
        "spice": request.form.get('spice'),
        "violence": request.form.get('violence'),
        "narrative_tense": request.form.get('narrative_tense'),
        "language_style": request.form.get('language_style'),
        "dialogue_style": request.form.get('dialogue_style'),
        "page_orientation": request.form.get('page_orientation'),
        "tropes": [x.strip() for x in request.form.get('tropes', '').split(',') if x.strip()],
        "formatting_rules": [x.strip() for x in request.form.get('formatting_rules', '').split(',') if x.strip()]
    }

    bible = {
        "project_metadata": {
            "title": title,
            "author": request.form.get('author'),
            "author_bio": request.form.get('author_bio'),
            "genre": request.form.get('genre'),
            "target_audience": request.form.get('audience'),
            "is_series": is_series,
            "length_settings": len_def,
            "style": style
        },
        "books": [],
        "characters": []
    }

    count = 1
    if is_series:
        try: count = int(request.form.get('series_count', 1))
        except: count = 3

    concept = request.form.get('concept', '')

    for i in range(count):
        bible['books'].append({
            "book_number": i+1,
            "title": f"{title} - Book {i+1}" if is_series else title,
            "manual_instruction": concept if i==0 else "",
            "plot_beats": []
        })

    try:
        ai_setup.init_models()
        bible = planner.enrich(bible, proj_path)
    except: pass

    with open(os.path.join(proj_path, "bible.json"), 'w') as f:
        json.dump(bible, f, indent=2)

    new_proj = Project(user_id=current_user.id, name=title, folder_path=proj_path)
    db.session.add(new_proj)
    db.session.commit()

    return redirect(url_for('project.view_project', id=new_proj.id))


@project_bp.route('/project/import', methods=['POST'])
@login_required
def import_project():
    if 'bible_file' not in request.files:
        flash('No file part')
        return redirect(url_for('project.index'))

    file = request.files['bible_file']
    if file.filename == '':
        flash('No selected file')
        return redirect(url_for('project.index'))

    if file:
        try:
            bible = json.load(file)
            if 'project_metadata' not in bible or 'title' not in bible['project_metadata']:
                flash("Invalid Bible format: Missing project_metadata or title.")
                return redirect(url_for('project.index'))

            title = bible['project_metadata']['title']
            safe_title = utils.sanitize_filename(title)

            user_dir = os.path.join(config.DATA_DIR, "users", str(current_user.id))
            os.makedirs(user_dir, exist_ok=True)

            proj_path = os.path.join(user_dir, safe_title)
            if os.path.exists(proj_path):
                safe_title += f"_{int(datetime.utcnow().timestamp())}"
                proj_path = os.path.join(user_dir, safe_title)
            os.makedirs(proj_path)

            with open(os.path.join(proj_path, "bible.json"), 'w') as f:
                json.dump(bible, f, indent=2)

            new_proj = Project(user_id=current_user.id, name=title, folder_path=proj_path)
            db.session.add(new_proj)
            db.session.commit()

            flash(f"Project '{title}' imported successfully.")
            return redirect(url_for('project.view_project', id=new_proj.id))

        except Exception as e:
            flash(f"Import failed: {str(e)}")
            return redirect(url_for('project.index'))


@project_bp.route('/project/<int:id>')
@login_required
def view_project(id):
    proj = db.session.get(Project, id)
    if not proj: return "Project not found", 404

    if proj.user_id != current_user.id: return "Unauthorized", 403

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible_data = utils.load_json(bible_path)

    draft_path = os.path.join(proj.folder_path, "bible_draft.json")
    has_draft = os.path.exists(draft_path)
    is_refining = os.path.exists(os.path.join(proj.folder_path, ".refining"))

    personas = {}
    if os.path.exists(config.PERSONAS_FILE):
        try:
            with open(config.PERSONAS_FILE, 'r') as f: personas = json.load(f)
        except: pass

    runs = Run.query.filter_by(project_id=id).order_by(Run.id.desc()).all()
    latest_run = runs[0] if runs else None

    other_projects = Project.query.filter(Project.user_id == current_user.id, Project.id != id).all()

    artifacts = []
    cover_image = None
    generated_books = {}
    locked = is_project_locked(id)

    for r in runs:
        if r.status == 'completed':
            run_dir = os.path.join(proj.folder_path, "runs", f"run_{r.id}")
            if os.path.exists(run_dir):
                for d in os.listdir(run_dir):
                    if d.startswith("Book_") and os.path.isdir(os.path.join(run_dir, d)):
                        if os.path.exists(os.path.join(run_dir, d, "manuscript.json")):
                            try:
                                parts = d.split('_')
                                if len(parts) > 1 and parts[1].isdigit():
                                    b_num = int(parts[1])
                                    if b_num not in generated_books:
                                        book_path = os.path.join(run_dir, d)
                                        epub_file = next((f for f in os.listdir(book_path) if f.endswith('.epub')), None)
                                        docx_file = next((f for f in os.listdir(book_path) if f.endswith('.docx')), None)
                                        generated_books[b_num] = {'status': 'generated', 'run_id': r.id, 'folder': d, 'epub': os.path.join(d, epub_file).replace("\\", "/") if epub_file else None, 'docx': os.path.join(d, docx_file).replace("\\", "/") if docx_file else None}
                            except: pass

    if latest_run:
        run_dir = os.path.join(proj.folder_path, "runs", f"run_{latest_run.id}")
        if os.path.exists(run_dir):
            if os.path.exists(os.path.join(run_dir, "cover.png")):
                cover_image = "cover.png"
            else:
                subdirs = utils.get_sorted_book_folders(run_dir)
                for d in subdirs:
                    if os.path.exists(os.path.join(run_dir, d, "cover.png")):
                        cover_image = os.path.join(d, "cover.png").replace("\\", "/")
                        break

            for root, dirs, files in os.walk(run_dir):
                for f in files:
                    if f.lower().endswith(('.epub', '.docx')):
                        rel_path = os.path.relpath(os.path.join(root, f), run_dir)
                        artifacts.append({
                            'name': f,
                            'path': rel_path.replace("\\", "/"),
                            'type': f.split('.')[-1].upper()
                        })

    return render_template('project.html', project=proj, bible=bible_data, runs=runs, active_run=latest_run, artifacts=artifacts, cover_image=cover_image, personas=personas, generated_books=generated_books, other_projects=other_projects, locked=locked, has_draft=has_draft, is_refining=is_refining)


@project_bp.route('/project/<int:id>/run', methods=['POST'])
@login_required
def run_project(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)

    new_run = Run(project_id=id, status="queued")
    db.session.add(new_run)
    db.session.commit()

    bible_path = os.path.join(proj.folder_path, "bible.json")
    generate_book_task(new_run.id, proj.folder_path, bible_path, allow_copy=True)

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/review')
@login_required
def review_project(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible = utils.load_json(bible_path)

    return render_template('project_review.html', project=proj, bible=bible)


@project_bp.route('/project/<int:id>/update', methods=['POST'])
@login_required
def update_project_metadata(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    new_title = request.form.get('title')
    new_author = request.form.get('author')

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible = utils.load_json(bible_path)

    if bible:
        if new_title:
            bible['project_metadata']['title'] = new_title
            proj.name = new_title
        if new_author:
            bible['project_metadata']['author'] = new_author

        with open(bible_path, 'w') as f: json.dump(bible, f, indent=2)
        db.session.commit()

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/clone', methods=['POST'])
@login_required
def clone_project(id):
    source_proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if source_proj.user_id != current_user.id: return "Unauthorized", 403

    new_name = request.form.get('new_name')
    instruction = request.form.get('instruction')

    safe_title = utils.sanitize_filename(new_name)
    user_dir = os.path.join(config.DATA_DIR, "users", str(current_user.id))
    new_path = os.path.join(user_dir, safe_title)
    if os.path.exists(new_path):
        safe_title += f"_{int(datetime.utcnow().timestamp())}"
        new_path = os.path.join(user_dir, safe_title)
    os.makedirs(new_path)

    source_bible_path = os.path.join(source_proj.folder_path, "bible.json")
    if os.path.exists(source_bible_path):
        bible = utils.load_json(source_bible_path)
        bible['project_metadata']['title'] = new_name

        if instruction:
            try:
                ai_setup.init_models()
                bible = bible_tracker.refine_bible(bible, instruction, new_path) or bible
            except: pass

        with open(os.path.join(new_path, "bible.json"), 'w') as f: json.dump(bible, f, indent=2)

    new_proj = Project(user_id=current_user.id, name=new_name, folder_path=new_path)
    db.session.add(new_proj)
    db.session.commit()

    flash(f"Project cloned as '{new_name}'.")
    return redirect(url_for('project.view_project', id=new_proj.id))


@project_bp.route('/project/<int:id>/bible_comparison')
@login_required
def bible_comparison(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    bible_path = os.path.join(proj.folder_path, "bible.json")
    draft_path = os.path.join(proj.folder_path, "bible_draft.json")

    if not os.path.exists(draft_path):
        flash("No draft found. Please refine the bible first.")
        return redirect(url_for('project.review_project', id=id))

    original = utils.load_json(bible_path)
    new_draft = utils.load_json(draft_path)

    if not original or not new_draft:
        flash("Error loading bible data. Draft may be corrupt.")
        return redirect(url_for('project.review_project', id=id))

    return render_template('bible_comparison.html', project=proj, original=original, new=new_draft)


@project_bp.route('/project/<int:id>/refine_bible', methods=['POST'])
@login_required
def refine_bible_route(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    data = request.json if request.is_json else request.form
    instruction = data.get('instruction')

    if not instruction:
        return {"error": "Instruction required"}, 400

    source_type = data.get('source', 'original')
    selected_keys = data.get('selected_keys')
    if isinstance(selected_keys, str):
        try: selected_keys = json.loads(selected_keys) if selected_keys.strip() else []
        except: selected_keys = []

    task = refine_bible_task(proj.folder_path, instruction, source_type, selected_keys)

    return {"status": "queued", "task_id": task.id}


@project_bp.route('/project/<int:id>/is_refining')
@login_required
def check_refinement_status(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403
    is_refining = os.path.exists(os.path.join(proj.folder_path, ".refining"))
    return {"is_refining": is_refining}


@project_bp.route('/project/<int:id>/refine_bible/confirm', methods=['POST'])
@login_required
def confirm_bible_refinement(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    action = request.form.get('action')
    draft_path = os.path.join(proj.folder_path, "bible_draft.json")
    bible_path = os.path.join(proj.folder_path, "bible.json")

    if action == 'accept' or action == 'accept_all':
        if os.path.exists(draft_path):
            shutil.move(draft_path, bible_path)
            flash("Bible updated successfully.")
        else:
            flash("Draft expired or missing.")

    elif action == 'accept_selected':
        if os.path.exists(draft_path) and os.path.exists(bible_path):
            selected_keys_json = request.form.get('selected_keys', '[]')
            try:
                selected_keys = json.loads(selected_keys_json)
                draft = utils.load_json(draft_path)
                original = utils.load_json(bible_path)

                original = bible_tracker.merge_selected_changes(original, draft, selected_keys)

                with open(bible_path, 'w') as f: json.dump(original, f, indent=2)
                os.remove(draft_path)
                flash(f"Merged {len(selected_keys)} changes into Bible.")

            except Exception as e:
                flash(f"Merge failed: {e}")
        else:
            flash("Files missing.")

    elif action == 'decline':
        if os.path.exists(draft_path):
            os.remove(draft_path)
            flash("Changes discarded.")

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/add_book', methods=['POST'])
@login_required
def add_book(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    title = request.form.get('title', 'Untitled')
    instruction = request.form.get('instruction', '')

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible = utils.load_json(bible_path)

    if bible:
        if 'books' not in bible: bible['books'] = []
        next_num = len(bible['books']) + 1

        new_book = {
            "book_number": next_num,
            "title": title,
            "manual_instruction": instruction,
            "plot_beats": []
        }
        bible['books'].append(new_book)

        if 'project_metadata' in bible:
            bible['project_metadata']['is_series'] = True

        with open(bible_path, 'w') as f: json.dump(bible, f, indent=2)
        flash(f"Added Book {next_num}: {title}")

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/book/<int:book_num>/update', methods=['POST'])
@login_required
def update_book_details(id, book_num):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    new_title = request.form.get('title')
    new_instruction = request.form.get('instruction')

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible = utils.load_json(bible_path)

    if bible and 'books' in bible:
        for b in bible['books']:
            if b.get('book_number') == book_num:
                if new_title: b['title'] = new_title
                if new_instruction is not None: b['manual_instruction'] = new_instruction
                break
        with open(bible_path, 'w') as f: json.dump(bible, f, indent=2)
        flash(f"Book {book_num} updated.")

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/delete_book/<int:book_num>', methods=['POST'])
@login_required
def delete_book(id, book_num):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible = utils.load_json(bible_path)

    if bible and 'books' in bible:
        bible['books'] = [b for b in bible['books'] if b.get('book_number') != book_num]
        for i, b in enumerate(bible['books']):
            b['book_number'] = i + 1

        if 'project_metadata' in bible:
            bible['project_metadata']['is_series'] = (len(bible['books']) > 1)

        with open(bible_path, 'w') as f: json.dump(bible, f, indent=2)
        flash("Book deleted from plan.")

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/import_characters', methods=['POST'])
@login_required
def import_characters(id):
    target_proj = db.session.get(Project, id)
    source_id = request.form.get('source_project_id')
    source_proj = db.session.get(Project, source_id)

    if not target_proj or not source_proj: return "Project not found", 404
    if target_proj.user_id != current_user.id or source_proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    target_bible = utils.load_json(os.path.join(target_proj.folder_path, "bible.json"))
    source_bible = utils.load_json(os.path.join(source_proj.folder_path, "bible.json"))

    if target_bible and source_bible:
        existing_names = {c['name'].lower() for c in target_bible.get('characters', [])}
        added_count = 0

        for char in source_bible.get('characters', []):
            if char['name'].lower() not in existing_names:
                target_bible['characters'].append(char)
                added_count += 1

        if added_count > 0:
            with open(os.path.join(target_proj.folder_path, "bible.json"), 'w') as f:
                json.dump(target_bible, f, indent=2)
            flash(f"Imported {added_count} characters from {source_proj.name}.")
        else:
            flash("No new characters found to import.")

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/project/<int:id>/set_persona', methods=['POST'])
@login_required
def set_project_persona(id):
    proj = db.session.get(Project, id) or Project.query.get_or_404(id)
    if proj.user_id != current_user.id: return "Unauthorized", 403

    if is_project_locked(id):
        flash("Project is locked. Clone it to make changes.")
        return redirect(url_for('project.view_project', id=id))

    persona_name = request.form.get('persona_name')

    bible_path = os.path.join(proj.folder_path, "bible.json")
    bible = utils.load_json(bible_path)

    if bible:
        personas = {}
        if os.path.exists(config.PERSONAS_FILE):
            try:
                with open(config.PERSONAS_FILE, 'r') as f: personas = json.load(f)
            except: pass

        if persona_name in personas:
            bible['project_metadata']['author_details'] = personas[persona_name]
            with open(bible_path, 'w') as f: json.dump(bible, f, indent=2)
            flash(f"Project voice updated to persona: {persona_name}")
        else:
            flash("Persona not found.")

    return redirect(url_for('project.view_project', id=id))


@project_bp.route('/run/<int:id>/stop', methods=['POST'])
@login_required
def stop_run(id):
    run = db.session.get(Run, id) or Run.query.get_or_404(id)
    if run.project.user_id != current_user.id: return "Unauthorized", 403

    if run.status in ['queued', 'running']:
        run.status = 'cancelled'
        run.end_time = datetime.utcnow()
        db.session.commit()

        run_dir = os.path.join(run.project.folder_path, "runs", f"run_{run.id}")
        if os.path.exists(run_dir):
            with open(os.path.join(run_dir, ".stop"), 'w') as f: f.write("stop")

        flash(f"Run {id} marked as cancelled.")

    return redirect(url_for('project.view_project', id=run.project_id))


@project_bp.route('/run/<int:id>/restart', methods=['POST'])
@login_required
def restart_run(id):
    run = db.session.get(Run, id) or Run.query.get_or_404(id)
    if run.project.user_id != current_user.id: return "Unauthorized", 403

    new_run = Run(project_id=run.project_id, status="queued")
    db.session.add(new_run)
    db.session.commit()

    mode = request.form.get('mode', 'resume')
    feedback = request.form.get('feedback')
    keep_cover = 'keep_cover' in request.form
    force_regen = 'force_regenerate' in request.form
    allow_copy = (mode == 'resume' and not force_regen)
    if feedback: allow_copy = False

    generate_book_task(new_run.id, run.project.folder_path, os.path.join(run.project.folder_path, "bible.json"), allow_copy=allow_copy, feedback=feedback, source_run_id=id if feedback else None, keep_cover=keep_cover)
    flash(f"Started new Run #{new_run.id}" + (" with modifications." if feedback else "."))
    return redirect(url_for('project.view_project', id=run.project_id))


@project_bp.route('/project/<int:run_id>/revise_book/<string:book_folder>', methods=['POST'])
@login_required
def revise_book(run_id, book_folder):
    run = db.session.get(Run, run_id) or Run.query.get_or_404(run_id)
    if run.project.user_id != current_user.id: return "Unauthorized", 403

    instruction = request.form.get('instruction')

    new_run = Run(project_id=run.project_id, status="queued")
    db.session.add(new_run)
    db.session.commit()

    generate_book_task(
        new_run.id,
        run.project.folder_path,
        os.path.join(run.project.folder_path, "bible.json"),
        allow_copy=True,
        feedback=instruction,
        source_run_id=run.id,
        keep_cover=True,
        exclude_folders=[book_folder]
    )

    flash(f"Started Revision Run #{new_run.id}. Book '{book_folder}' will be regenerated.")
    return redirect(url_for('project.view_project', id=run.project_id))