import json
import os
from core import utils
from ai import models as ai_models
from story.style_persona import get_style_guidelines


def evaluate_chapter_quality(text, chapter_title, genre, model, folder):
    guidelines = get_style_guidelines()
    ai_isms = "', '".join(guidelines['ai_isms'])
    fw_examples = ", ".join([f"'He {w}'" for w in guidelines['filter_words'][:5]])

    word_count = len(text.split()) if text else 0
    min_sugg = max(3, int(word_count / 500))
    max_sugg = min_sugg + 2
    suggestion_range = f"{min_sugg}-{max_sugg}"

    prompt = f"""
    ROLE: Senior Literary Editor
    TASK: Critique chapter draft.

    METADATA:
    - TITLE: {chapter_title}
    - GENRE: {genre}

    PROHIBITED_PATTERNS:
    - AI_ISMS: {ai_isms}
    - FILTER_WORDS: {fw_examples}
    - CLICHES: White Room, As You Know Bob, Summary Mode, Anachronisms.
    - SYNTAX: Repetitive structure, Passive Voice, Adverb Reliance.

    QUALITY_RUBRIC (1-10):
    1. ENGAGEMENT & TENSION: Does the story grip the reader from the first line? Is there conflict or tension in every scene?
    2. SCENE EXECUTION: Is the middle of the chapter fully fleshed out? Does it avoid "sagging" or summarizing key moments?
    3. VOICE & TONE: Is the narrative voice distinct? Does it match the genre?
    4. SENSORY IMMERSION: Does the text use sensory details effectively without being overwhelming?
    5. SHOW, DON'T TELL: Are emotions shown through physical reactions and subtext?
    6. CHARACTER AGENCY: Do characters drive the plot through active choices?
    7. PACING: Does the chapter feel rushed? Does the ending land with impact, or does it cut off too abruptly?
    8. GENRE APPROPRIATENESS: Are introductions of characters, places, items, or actions consistent with the {genre} conventions?
    9. DIALOGUE AUTHENTICITY: Do characters sound distinct? Is there subtext? Avoids "on-the-nose" dialogue.
    10. PLOT RELEVANCE: Does the chapter advance the plot or character arcs significantly? Avoids filler.
    11. STAGING & FLOW: Do characters enter/exit physically? Do paragraphs transition logically (Action -> Reaction)?
    12. PROSE DYNAMICS: Is there sentence variety? Avoids purple prose, adjective stacking, and excessive modification.
    13. CLARITY & READABILITY: Is the text easy to follow? Are sentences clear and concise?

    SCORING_SCALE:
    - 10 (Masterpiece): Flawless, impactful, ready for print.
    - 9 (Bestseller): Exceptional quality, minor style tweaks only.
    - 7-8 (Professional): Good draft, solid structure, needs editing.
    - 6 (Passable): Average, has issues with pacing or voice. Needs heavy refinement.
    - 1-5 (Fail): Structural flaws, boring, or incoherent. Needs rewrite.

    OUTPUT_FORMAT (JSON):
    {{
        "score": int,
        "critique": "Detailed analysis of flaws, citing specific examples from the text.",
        "actionable_feedback": "List of {suggestion_range} specific, ruthless instructions for the rewrite (e.g. 'Expand the middle dialogue', 'Add sensory details about the rain', 'Dramatize the argument instead of summarizing it')."
    }}
    """
    try:
        response = model.generate_content([prompt, text[:30000]])
        model_name = getattr(model, 'name', ai_models.logic_model_name)
        utils.log_usage(folder, model_name, response.usage_metadata)
        data = json.loads(utils.clean_json(response.text))

        critique_text = data.get('critique', 'No critique provided.')
        if data.get('actionable_feedback'):
            critique_text += "\n\nREQUIRED FIXES:\n" + str(data.get('actionable_feedback'))

        return data.get('score', 0), critique_text
    except Exception as e:
        return 0, f"Evaluation error: {str(e)}"


def check_pacing(bp, summary, last_chapter_text, last_chapter_data, remaining_chapters, folder):
    utils.log("ARCHITECT", "Checking pacing and structure health...")

    if not remaining_chapters:
        return None

    meta = bp.get('book_metadata', {})

    prompt = f"""
    ROLE: Structural Editor
    TASK: Analyze pacing.

    CONTEXT:
    - PREVIOUS_SUMMARY: {summary[-3000:]}
    - CURRENT_CHAPTER: {last_chapter_text[-2000:]}
    - UPCOMING: {json.dumps([c['title'] for c in remaining_chapters[:3]])}
    - REMAINING_COUNT: {len(remaining_chapters)}

    LOGIC:
    - IF skipped major beats -> ADD_BRIDGE
    - IF covered next chapter's beats -> CUT_NEXT
    - ELSE -> OK

    OUTPUT_FORMAT (JSON):
    {{
        "status": "ok" or "add_bridge" or "cut_next",
        "reason": "Explanation...",
        "new_chapter": {{ "title": "...", "beats": ["..."], "pov_character": "..." }} (Required if add_bridge)
    }}
    """
    try:
        response = ai_models.model_logic.generate_content(prompt)
        utils.log_usage(folder, ai_models.model_logic.name, response.usage_metadata)
        return json.loads(utils.clean_json(response.text))
    except Exception as e:
        utils.log("ARCHITECT", f"Pacing check failed: {e}")
        return None


def analyze_consistency(bp, manuscript, folder):
    utils.log("EDITOR", "Analyzing manuscript for continuity errors...")

    if not manuscript: return {"issues": ["No manuscript found."], "score": 0}
    if not bp: return {"issues": ["No blueprint found."], "score": 0}

    chapter_summaries = []
    for ch in manuscript:
        text = ch.get('content', '')
        excerpt = text[:1000] + "\n...\n" + text[-1000:] if len(text) > 2000 else text
        chapter_summaries.append(f"Ch {ch.get('num')}: {excerpt}")

    context = "\n".join(chapter_summaries)

    prompt = f"""
    ROLE: Continuity Editor
    TASK: Analyze book summary for plot holes.

    INPUT_DATA:
    - CHARACTERS: {json.dumps(bp.get('characters', []))}
    - SUMMARIES:
    {context}

    OUTPUT_FORMAT (JSON): {{ "issues": ["Issue 1", "Issue 2"], "score": 8, "summary": "Brief overall assessment." }}
    """
    try:
        response = ai_models.model_logic.generate_content(prompt)
        utils.log_usage(folder, ai_models.model_logic.name, response.usage_metadata)
        return json.loads(utils.clean_json(response.text))
    except Exception as e:
        return {"issues": [f"Analysis failed: {e}"], "score": 0, "summary": "Error during analysis."}


def rewrite_chapter_content(bp, manuscript, chapter_num, instruction, folder):
    utils.log("WRITER", f"Rewriting Ch {chapter_num} with instruction: {instruction}")

    target_chap = next((c for c in manuscript if str(c.get('num')) == str(chapter_num)), None)
    if not target_chap: return None

    prev_text = ""
    prev_chap = None
    if isinstance(chapter_num, int):
        prev_chap = next((c for c in manuscript if c['num'] == chapter_num - 1), None)
    elif str(chapter_num).lower() == "epilogue":
        numbered_chaps = [c for c in manuscript if isinstance(c['num'], int)]
        if numbered_chaps:
            prev_chap = max(numbered_chaps, key=lambda x: x['num'])

    if prev_chap:
        prev_text = prev_chap.get('content', '')[-3000:]

    meta = bp.get('book_metadata', {})

    ad = meta.get('author_details', {})
    if not ad and 'author_bio' in meta:
        persona_info = meta['author_bio']
    else:
        persona_info = f"Name: {ad.get('name', meta.get('author', 'Unknown'))}\n"
        if ad.get('bio'): persona_info += f"Style/Bio: {ad['bio']}\n"

    char_visuals = ""
    from core import config
    tracking_path = os.path.join(folder, "tracking_characters.json")
    if os.path.exists(tracking_path):
        try:
            tracking_chars = utils.load_json(tracking_path)
            if tracking_chars:
                char_visuals = "\nCHARACTER TRACKING (Visuals & Preferences):\n"
                for name, data in tracking_chars.items():
                    desc = ", ".join(data.get('descriptors', []))
                    speech = data.get('speech_style', 'Unknown')
                    char_visuals += f"- {name}: {desc}\n  * Speech: {speech}\n"
        except: pass

    guidelines = get_style_guidelines()
    fw_list = '", "'.join(guidelines['filter_words'])

    prompt = f"""
    You are an expert fiction writing AI. Your task is to rewrite a specific chapter based on a user directive.

    INPUT DATA:
    - TITLE: {meta.get('title')}
    - GENRE: {meta.get('genre')}
    - TONE: {meta.get('style', {}).get('tone')}
    - AUTHOR_VOICE: {persona_info}
    - PREVIOUS_CONTEXT: {prev_text}
    - CURRENT_DRAFT: {target_chap.get('content', '')[:5000]}
    - CHARACTERS: {json.dumps(bp.get('characters', []))}
    {char_visuals}

    PRIMARY DIRECTIVE (USER INSTRUCTION):
    {instruction}

    EXECUTION RULES:
    1. CONTINUITY: The new text must flow logically from PREVIOUS_CONTEXT.
    2. ADHERENCE: The PRIMARY DIRECTIVE overrides any conflicting details in CURRENT_DRAFT.
    3. VOICE: Strictly emulate the AUTHOR_VOICE.
    4. GENRE: Enforce {meta.get('genre')} conventions. No anachronisms.
    5. LOGIC: Enforce strict causality (Action -> Reaction). No teleporting characters.

    PROSE OPTIMIZATION RULES (STRICT ENFORCEMENT):
    - FILTER_REMOVAL: Scan for words [{fw_list}]. If found, rewrite the sentence to remove the filter and describe the sensation directly.
    - SENTENCE_VARIETY: Penalize consecutive sentences starting with the same pronoun or article. Vary structure.
    - SHOW_DONT_TELL: Convert internal summaries of emotion into physical actions or subtextual dialogue.
    - ACTIVE_VOICE: Convert passive voice ("was [verb]ed") to active voice.
    - SENSORY_ANCHORING: The first paragraph must establish the setting using at least one non-visual sense (smell, sound, touch).
    - SUBTEXT: Dialogue must imply meaning rather than stating it outright.

    RETURN JSON:
    {{
        "content": "The full chapter text in Markdown...",
        "summary": "A concise summary of the chapter's events and ending state (for continuity checks)."
    }}
    """

    try:
        response = ai_models.model_logic.generate_content(prompt)
        utils.log_usage(folder, ai_models.model_logic.name, response.usage_metadata)
        try:
            data = json.loads(utils.clean_json(response.text))
            return data.get('content'), data.get('summary')
        except:
            return response.text, None
    except Exception as e:
        utils.log("WRITER", f"Rewrite failed: {e}")
        return None, None


def check_and_propagate(bp, manuscript, changed_chap_num, folder, change_summary=None):
    utils.log("WRITER", f"Checking ripple effects from Ch {changed_chap_num}...")

    changed_chap = next((c for c in manuscript if c['num'] == changed_chap_num), None)
    if not changed_chap: return None

    if change_summary:
        current_context = change_summary
    else:
        change_summary_prompt = f"""
        ROLE: Summarizer
        TASK: Summarize the key events and ending state of this chapter for continuity tracking.

        TEXT:
        {changed_chap.get('content', '')[:10000]}

        FOCUS:
        - Major plot points.
        - Character status changes (injuries, items acquired, location changes).
        - New information revealed.

        OUTPUT: Concise text summary.
        """
        try:
            resp = ai_models.model_writer.generate_content(change_summary_prompt)
            utils.log_usage(folder, ai_models.model_writer.name, resp.usage_metadata)
            current_context = resp.text
        except:
            current_context = changed_chap.get('content', '')[-2000:]

    original_change_context = current_context
    sorted_ms = sorted(manuscript, key=utils.chapter_sort_key)
    start_index = -1
    for i, c in enumerate(sorted_ms):
        if str(c['num']) == str(changed_chap_num):
            start_index = i
            break

    if start_index == -1 or start_index == len(sorted_ms) - 1:
        return None

    changes_made = False
    consecutive_no_changes = 0
    potential_impact_chapters = []

    for i in range(start_index + 1, len(sorted_ms)):
        target_chap = sorted_ms[i]

        if consecutive_no_changes >= 2:
            if target_chap['num'] not in potential_impact_chapters:
                future_flags = [n for n in potential_impact_chapters if isinstance(n, int) and isinstance(target_chap['num'], int) and n > target_chap['num']]

                if not future_flags:
                    remaining_chaps = sorted_ms[i:]
                    if not remaining_chaps: break

                    utils.log("WRITER", "  -> Short-term ripple dissipated. Scanning remaining chapters for long-range impacts...")

                    chapter_summaries = []
                    for rc in remaining_chaps:
                        text = rc.get('content', '')
                        excerpt = text[:500] + "\n...\n" + text[-500:] if len(text) > 1000 else text
                        chapter_summaries.append(f"Ch {rc['num']}: {excerpt}")

                    scan_prompt = f"""
                    ROLE: Continuity Scanner
                    TASK: Identify chapters impacted by a change.

                    CHANGE_CONTEXT:
                    {original_change_context}

                    CHAPTER_SUMMARIES:
                    {json.dumps(chapter_summaries)}

                    CRITERIA: Identify later chapters that mention items, characters, or locations involved in the Change Context.

                    OUTPUT_FORMAT (JSON): [Chapter_Number_Int, ...]
                    """

                    try:
                        resp = ai_models.model_logic.generate_content(scan_prompt)
                        utils.log_usage(folder, ai_models.model_logic.name, resp.usage_metadata)
                        potential_impact_chapters = json.loads(utils.clean_json(resp.text))
                        if not isinstance(potential_impact_chapters, list): potential_impact_chapters = []
                        potential_impact_chapters = [int(x) for x in potential_impact_chapters if str(x).isdigit()]
                    except Exception as e:
                        utils.log("WRITER", f"  -> Scan failed: {e}. Stopping.")
                        break

                    if not potential_impact_chapters:
                        utils.log("WRITER", "  -> No long-range impacts detected. Stopping.")
                        break
                    else:
                        utils.log("WRITER", f"  -> Detected potential impact in chapters: {potential_impact_chapters}")

                if isinstance(target_chap['num'], int) and target_chap['num'] not in potential_impact_chapters:
                    utils.log("WRITER", f"  -> Skipping Ch {target_chap['num']} (Not flagged).")
                    continue

        utils.log("WRITER", f"  -> Checking Ch {target_chap['num']} for continuity...")

        chap_word_count = len(target_chap.get('content', '').split())
        prompt = f"""
        ROLE: Continuity Checker
        TASK: Determine if a chapter contradicts a story change. If it does, rewrite it to fix the contradiction.

        CHANGED_CHAPTER: {changed_chap_num}
        CHANGE_SUMMARY: {current_context}

        CHAPTER_TO_CHECK (Ch {target_chap['num']}):
        {target_chap['content'][:12000]}

        DECISION_LOGIC:
        - If the chapter directly contradicts the change (references dead characters, items that no longer exist, events that didn't happen), status = REWRITE.
        - If the chapter is consistent or only tangentially related, status = NO_CHANGE.
        - Be conservative — only rewrite if there is a genuine contradiction.

        REWRITE_RULES (apply only if REWRITE):
        - Fix the specific contradiction. Preserve all other content.
        - The rewritten chapter MUST be approximately {chap_word_count} words (same length as original).
        - Include the chapter header formatted as Markdown H1.
        - Do not add new plot points not in the original.

        OUTPUT_FORMAT (JSON):
        {{
            "status": "NO_CHANGE" or "REWRITE",
            "reason": "Brief explanation of the contradiction or why it's consistent",
            "content": "Full Markdown rewritten chapter (ONLY if status is REWRITE, otherwise null)"
        }}
        """

        try:
            response = ai_models.model_writer.generate_content(prompt)
            utils.log_usage(folder, ai_models.model_writer.name, response.usage_metadata)
            data = json.loads(utils.clean_json(response.text))

            if data.get('status') == 'NO_CHANGE':
                utils.log("WRITER", f"  -> Ch {target_chap['num']} is consistent.")
                current_context = f"Ch {target_chap['num']} Summary: " + target_chap.get('content', '')[-2000:]
                consecutive_no_changes += 1
            elif data.get('status') == 'REWRITE' and data.get('content'):
                new_text = data.get('content')
                if new_text:
                    utils.log("WRITER", f"  -> Rewriting Ch {target_chap['num']} to fix continuity.")
                    target_chap['content'] = new_text
                    changes_made = True
                    current_context = f"Ch {target_chap['num']} Summary: " + new_text[-2000:]
                    consecutive_no_changes = 0

                    try:
                        with open(os.path.join(folder, "manuscript.json"), 'w') as f: json.dump(manuscript, f, indent=2)
                    except: pass

        except Exception as e:
            utils.log("WRITER", f"  -> Check failed: {e}")

    return manuscript if changes_made else None