"""FastAPI server for the multi-agent content generation system.

All agents run on port 7860 with different API endpoints:
- /api/agents/showrunner - Generate episode directive
- /api/agents/story-editor - Generate episode outline
- /api/agents/cultural-consultant - Review for cultural accuracy
- /api/agents/lead-writer - Write episode script
- /api/agents/dialogue-specialist - Polish dialogue
- /api/agents/comedy-writer - Add humor and punch-ups
- /api/agents/proofreader - Final quality control
- /api/pipeline - Execute full pipeline
"""
import logging
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import Optional
from orchestrator import PipelineOrchestrator
from config import settings
from instructor import Instructor
from fastapi.responses import HTMLResponse
import requests


# Configure logging
logging.basicConfig(
    level=settings.log_level,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
)
logger = logging.getLogger(__name__)

# Initialize FastAPI app
app = FastAPI(
    title="Multi-Agent Content Generation System",
    description="API-first system for collaborative content generation using poolside/laguna-m.1:free. All agents on port 7860.",
    version="1.0.0",
)

# Initialize orchestrator and instructor
orchestrator = PipelineOrchestrator()
instructor = Instructor()
latest_briefs = {} # Store by session or just global for now


# Request/Response Models
class PipelineRequest(BaseModel):
    """Request model for pipeline execution."""
    user_brief: str
    season_arc_document: str
    character_bible: str
    world_building_document: str
    character_voice_guide: str
    style_guide: str
    continuity_log: str
    hook_brief: Optional[str] = None


class PipelineResponse(BaseModel):
    """Response model for pipeline execution."""
    run_id: str
    status: str
    final_output: dict
    hf_output_url: str
    hf_metadata_url: str


class HealthResponse(BaseModel):
    """Health check response."""
    status: str
    run_id: str
    port: int


# ─────────────────────────────────────────────────────────────────────────────
# HEALTH & STATUS ENDPOINTS
# ─────────────────────────────────────────────────────────────────────────────

@app.get("/health", response_model=HealthResponse)
async def health_check():
    """Health check endpoint."""
    return {
        "status": "healthy",
        "run_id": orchestrator.run_id,
        "port": settings.port,
    }


@app.get("/", response_class=HTMLResponse)
async def root():
    """Root endpoint redirects to Instructor UI."""
    return await get_instructor_ui()


# ─────────────────────────────────────────────────────────────────────────────
# PIPELINE ENDPOINTS (Port 7860)
# ─────────────────────────────────────────────────────────────────────────────

@app.post("/api/pipeline/execute", response_model=PipelineResponse)
async def execute_pipeline(request: PipelineRequest):
    """Execute the full content generation pipeline.
    
    Endpoint: POST /api/pipeline/execute
    Port: 7860

    Args:
        request: Pipeline execution request with all required inputs

    Returns:
        Pipeline execution result with final output and URLs
    """
    try:
        logger.info(f"[PIPELINE] Received execution request: {request.user_brief[:50]}...")
        
        result = orchestrator.execute_pipeline(
            user_brief=request.user_brief,
            season_arc_document=request.season_arc_document,
            character_bible=request.character_bible,
            world_building_document=request.world_building_document,
            character_voice_guide=request.character_voice_guide,
            style_guide=request.style_guide,
            continuity_log=request.continuity_log,
            hook_brief=request.hook_brief,
        )
        
        return {
            "run_id": result["run_id"],
            "status": result["status"],
            "final_output": result["final_output"],
            "hf_output_url": result["hf_output_url"],
            "hf_metadata_url": result["hf_metadata_url"],
        }
        
    except Exception as e:
        logger.error(f"[PIPELINE] Execution error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.get("/api/pipeline/status/{run_id}")
async def get_pipeline_status(run_id: str):
    """Get the status of a pipeline run.
    
    Endpoint: GET /api/pipeline/status/{run_id}
    Port: 7860

    Args:
        run_id: The run ID to check

    Returns:
        Pipeline status and state
    """
    try:
        if run_id == orchestrator.run_id:
            return {
                "run_id": run_id,
                "status": orchestrator.pipeline_state.get("status", "unknown"),
                "pipeline_state": orchestrator.pipeline_state,
            }
        else:
            raise HTTPException(status_code=404, detail="Run ID not found")
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))


# ─────────────────────────────────────────────────────────────────────────────
# INSTRUCTOR ENDPOINTS (Port 7860)
# ─────────────────────────────────────────────────────────────────────────────

@app.get("/instructor", response_class=HTMLResponse)
async def get_instructor_ui():
    """Instructor UI for brief approval."""
    html_content = """
    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Instructor Module - Brief Approval</title>
        <script src="https://cdn.tailwindcss.com"></script>
        <style>
            .loading { display: none; }
            .loading.active { display: flex; }
        </style>
    </head>
    <body class="bg-gray-100 min-h-screen p-8">
        <div class="max-w-4xl mx-auto bg-white rounded-xl shadow-md overflow-hidden p-6">
            <h1 class="text-3xl font-bold text-gray-800 mb-6">Instructor Module</h1>
            
            <div id="setup-section" class="mb-8">
                <h2 class="text-xl font-semibold mb-4">Generate New Brief</h2>
                <div class="flex flex-col gap-4">
                    <p class="text-sm text-gray-600">Enter trending topics or news items to fuse into a storytelling brief.</p>
                    <div class="flex gap-4">
                        <input type="text" id="topics-input" placeholder="e.g. AI agents, TikTok trends, Summer Olympics" 
                               class="flex-1 p-2 border rounded-lg focus:ring-2 focus:ring-blue-500 outline-none">
                        <button onclick="generateBrief()" id="gen-btn"
                                class="bg-blue-600 text-white px-6 py-2 rounded-lg hover:bg-blue-700 transition">
                            Generate
                        </button>
                    </div>
                </div>
            </div>

            <div id="loading-spinner" class="loading flex-col items-center justify-center py-12">
                <div class="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600"></div>
                <span class="ml-4 mt-4 text-gray-600">Instructor is fusing trends into a story...</span>
            </div>

            <div id="brief-section" class="hidden">
                <div class="flex justify-between items-center mb-4">
                    <h2 class="text-xl font-semibold text-blue-600">Proposed Storytelling Brief</h2>
                    <span class="bg-blue-100 text-blue-800 text-xs font-medium px-2.5 py-0.5 rounded">LLM Generated</span>
                </div>
                <div id="brief-content" class="space-y-4 bg-gray-50 p-6 rounded-lg border border-gray-200 mb-6 max-h-[500px] overflow-y-auto">
                    <!-- Brief fields will be injected here -->
                </div>
                <div class="flex gap-4">
                    <button onclick="approveBrief(true)" id="approve-btn"
                            class="bg-green-600 text-white px-8 py-3 rounded-lg font-bold hover:bg-green-700 transition flex-1 shadow-lg">
                        Approve & Execute Pipeline
                    </button>
                    <button onclick="approveBrief(false)" 
                            class="bg-gray-400 text-white px-8 py-3 rounded-lg font-bold hover:bg-gray-500 transition">
                        Discard
                    </button>
                </div>
            </div>

            <div id="status-section" class="mt-8 p-4 rounded-lg hidden">
                <p id="status-message" class="font-medium"></p>
                <div id="status-details" class="mt-2 text-sm"></div>
            </div>
        </div>

        <script>
            let currentBrief = null;

            async function generateBrief() {
                const topicsInput = document.getElementById('topics-input').value;
                const topics = topicsInput.split(',').map(t => t.trim()).filter(t => t);
                
                if (topics.length === 0) {
                    alert('Please enter at least one topic');
                    return;
                }

                showLoading(true);
                document.getElementById('brief-section').classList.add('hidden');
                document.getElementById('status-section').classList.add('hidden');

                try {
                    const response = await fetch('/api/instructor/generate', {
                        method: 'POST',
                        headers: { 'Content-Type': 'application/json' },
                        body: JSON.stringify({ topics })
                    });
                    
                    const data = await response.json();
                    if (data.status === 'success') {
                        currentBrief = data.brief;
                        displayBrief(currentBrief);
                    } else {
                        throw new Error(data.detail || 'Generation failed');
                    }
                } catch (error) {
                    showStatus('Error generating brief: ' + error.message, 'bg-red-100 text-red-700');
                } finally {
                    showLoading(false);
                }
            }

            function displayBrief(brief) {
                const content = document.getElementById('brief-content');
                content.innerHTML = '';
                
                const fieldOrder = [
                    'user_brief', 'hook_brief', 'style_guide', 
                    'character_bible', 'world_building_document', 
                    'season_arc_document', 'character_voice_guide', 'continuity_log'
                ];

                fieldOrder.forEach(key => {
                    if (brief[key]) {
                        const div = document.createElement('div');
                        div.className = 'mb-6 border-b border-gray-200 pb-4 last:border-0';
                        div.innerHTML = `
                            <h3 class="text-xs font-bold text-blue-500 uppercase tracking-widest mb-1">${key.replace(/_/g, ' ')}</h3>
                            <p class="text-gray-800 leading-relaxed">${brief[key]}</p>
                        `;
                        content.appendChild(div);
                    }
                });
                
                document.getElementById('brief-section').classList.remove('hidden');
                content.scrollTop = 0;
            }

            async function approveBrief(approved) {
                if (!approved) {
                    document.getElementById('brief-section').classList.add('hidden');
                    return;
                }

                const btn = document.getElementById('approve-btn');
                btn.disabled = true;
                btn.innerHTML = `
                    <svg class="animate-spin -ml-1 mr-3 h-5 w-5 text-white inline" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                        <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
                        <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                    </svg>
                    Executing Pipeline...
                `;

                try {
                    const response = await fetch('/api/instructor/approve', {
                        method: 'POST',
                        headers: { 'Content-Type': 'application/json' },
                        body: JSON.stringify({ approved: true })
                    });
                    
                    const data = await response.json();
                    if (response.ok) {
                        showStatus('Success! Pipeline execution started.', 'bg-green-100 text-green-700');
                        const details = document.getElementById('status-details');
                        details.innerHTML = `
                            <p><strong>Run ID:</strong> ${data.run_id}</p>
                            <p class="mt-2"><a href="${data.hf_output_url}" target="_blank" class="text-blue-600 underline">View Output on Hugging Face</a></p>
                        `;
                        document.getElementById('brief-section').classList.add('hidden');
                    } else {
                        showStatus('Error: ' + (data.detail || 'Failed to start pipeline'), 'bg-red-100 text-red-700');
                    }
                } catch (error) {
                    showStatus('Connection error: ' + error.message, 'bg-red-100 text-red-700');
                } finally {
                    btn.disabled = false;
                    btn.innerText = 'Approve & Execute Pipeline';
                }
            }

            function showLoading(show) {
                document.getElementById('loading-spinner').classList.toggle('active', show);
                document.getElementById('gen-btn').disabled = show;
            }

            function showStatus(msg, classes) {
                const section = document.getElementById('status-section');
                section.className = 'mt-8 p-4 rounded-lg ' + classes;
                document.getElementById('status-message').innerText = msg;
                section.classList.remove('hidden');
            }
        </script>
    </body>
    </html>
    """
    return HTMLResponse(content=html_content)

@app.post("/api/instructor/generate")
async def api_generate_brief(request: dict):
    """API endpoint to generate a brief from trending topics."""
    try:
        topics = request.get("topics", [])
        if not topics:
            raise HTTPException(status_code=400, detail="No topics provided")
        
        logger.info(f"[INSTRUCTOR] Generating brief for topics: {topics}")
        brief = instructor.generate_brief(topics)
        
        # Store the brief for approval (using a simple global for this demo)
        global latest_briefs
        latest_briefs["current"] = brief
        
        return {"status": "success", "brief": brief}
    except Exception as e:
        logger.error(f"[INSTRUCTOR] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

@app.post("/api/instructor/approve")
async def api_approve_brief(request: dict):
    """API endpoint to approve and send the brief to the orchestrator."""
    if not request.get("approved"):
        return {"status": "discarded"}
    
    global latest_briefs
    brief = latest_briefs.get("current")
    
    if not brief:
        raise HTTPException(status_code=400, detail="No brief available to approve")

    try:
        logger.info("[INSTRUCTOR] Brief approved, executing pipeline")
        
        # We can call the orchestrator directly since we're in the same process
        result = orchestrator.execute_pipeline(
            user_brief=brief["user_brief"],
            season_arc_document=brief["season_arc_document"],
            character_bible=brief["character_bible"],
            world_building_document=brief["world_building_document"],
            character_voice_guide=brief["character_voice_guide"],
            style_guide=brief["style_guide"],
            continuity_log=brief["continuity_log"],
            hook_brief=brief.get("hook_brief"),
        )
        
        return {
            "status": "success",
            "run_id": result["run_id"],
            "hf_output_url": result["hf_output_url"]
        }
    except Exception as e:
        logger.error(f"[INSTRUCTOR] Pipeline error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

# ─────────────────────────────────────────────────────────────────────────────
# AGENT ENDPOINTS (Port 7860)
# ─────────────────────────────────────────────────────────────────────────────

@app.post("/api/agents/showrunner")
async def showrunner_endpoint(request: dict):
    """Showrunner Agent: Generate episode directive.
    
    Endpoint: POST /api/agents/showrunner
    Port: 7860
    
    Input:
        - user_brief: Initial user brief
        - season_arc_document: Season context
        - character_bible: Character definitions
    
    Output:
        - episode_directive: Generated directive
        - story_premise: Story premise
        - tone_brief: Tone brief
        - character_focus_notes: Character notes
    """
    try:
        logger.info("[SHOWRUNNER] Processing directive generation")
        result = orchestrator.showrunner.generate_directive(request)
        return result
    except Exception as e:
        logger.error(f"[SHOWRUNNER] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/api/agents/story-editor")
async def story_editor_endpoint(request: dict):
    """Story Editor Agent: Generate episode outline.
    
    Endpoint: POST /api/agents/story-editor
    Port: 7860
    
    Input:
        - episode_directive: From Showrunner
        - series_continuity_log: Continuity reference
        - character_list: Valid character names
    
    Output:
        - episode_outline: Generated outline
        - act_structure: Act breakdown
        - story_notes_for_writers: Story notes
    """
    try:
        logger.info("[STORY-EDITOR] Processing outline generation")
        result = orchestrator.story_editor.generate_outline(request)
        return result
    except Exception as e:
        logger.error(f"[STORY-EDITOR] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/api/agents/cultural-consultant")
async def cultural_consultant_endpoint(request: dict):
    """Cultural Consultant Agent: Review for cultural accuracy.
    
    Endpoint: POST /api/agents/cultural-consultant
    Port: 7860
    
    Input:
        - episode_outline: From Story Editor
        - world_building_document: World context
        - character_list: Valid character names
    
    Output:
        - cultural_accuracy_notes: Accuracy notes
        - flagged_inaccuracies: Issues found
        - approved_touchpoints: Approved elements
        - reference_suggestions: Suggestions
    """
    try:
        logger.info("[CULTURAL-CONSULTANT] Processing cultural review")
        result = orchestrator.cultural_consultant.review_outline(request)
        return result
    except Exception as e:
        logger.error(f"[CULTURAL-CONSULTANT] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/api/agents/lead-writer")
async def lead_writer_endpoint(request: dict):
    """Lead Writer Agent: Write episode script.
    
    Endpoint: POST /api/agents/lead-writer
    Port: 7860
    
    Input:
        - approved_outline: From Story Editor
        - cultural_consultant_notes: From Cultural Consultant
        - character_voice_guide: Character voice definitions
        - character_list: Valid character names
        - story_premise: Story premise from Showrunner
    
    Output:
        - full_episode_first_draft: Complete script
        - scene_descriptions: Scene descriptions
        - dialogue: Dialogue content
        - stage_directions: Stage directions
    """
    try:
        logger.info("[LEAD-WRITER] Processing script writing")
        result = orchestrator.lead_writer.write_script(request)
        return result
    except Exception as e:
        logger.error(f"[LEAD-WRITER] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/api/agents/dialogue-specialist")
async def dialogue_specialist_endpoint(request: dict):
    """Dialogue Specialist Agent: Polish dialogue.
    
    Endpoint: POST /api/agents/dialogue-specialist
    Port: 7860
    
    Input:
        - first_draft_script: From Lead Writer
        - character_voice_guide: Character voice definitions
        - character_list: Valid character names
        - dialect_slang_reference: Reference material
    
    Output:
        - dialogue_polished_script: Polished script
        - voice_consistency_notes: Voice notes
    """
    try:
        logger.info("[DIALOGUE-SPECIALIST] Processing dialogue polish")
        result = orchestrator.dialogue_specialist.polish_dialogue(request)
        return result
    except Exception as e:
        logger.error(f"[DIALOGUE-SPECIALIST] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/api/agents/comedy-writer")
async def comedy_writer_endpoint(request: dict):
    """Comedy Writer Agent: Add humor and punch-ups.
    
    Endpoint: POST /api/agents/comedy-writer
    Port: 7860
    
    Input:
        - dialogue_polished_script: From Dialogue Specialist
        - hook_brief_from_showrunner: Hook context
        - character_list: Valid character names
        - tone_brief: Tone reference
    
    Output:
        - comedy_sharpened_script: Comedy-enhanced script
        - punch_up_notes: Notes on changes
        - hook_rewrite_for_opening: Opening hook
    """
    try:
        logger.info("[COMEDY-WRITER] Processing humor addition")
        result = orchestrator.comedy_writer.add_humor(request)
        return result
    except Exception as e:
        logger.error(f"[COMEDY-WRITER] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/api/agents/proofreader")
async def proofreader_endpoint(request: dict):
    """Proofreader Agent: Final quality control.
    
    Endpoint: POST /api/agents/proofreader
    Port: 7860
    
    Input:
        - comedy_sharpened_script: From Comedy Writer
        - style_guide: Style reference
        - continuity_log: Continuity tracking
        - character_list: Valid character names
    
    Output:
        - final_locked_script: Final script
        - qc_report: Quality control report
        - continuity_log_update: Updated continuity log
    """
    try:
        logger.info("[PROOFREADER] Processing final QC")
        result = orchestrator.proofreader.final_qc(request)
        return result
    except Exception as e:
        logger.error(f"[PROOFREADER] Error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


# ─────────────────────────────────────────────────────────────────────────────
# SERVER STARTUP
# ─────────────────────────────────────────────────────────────────────────────

if __name__ == "__main__":
    import uvicorn
    
    logger.info(f"Starting Multi-Agent System on port {settings.port}")
    logger.info("All agents available at http://localhost:7860/api/agents/*")
    logger.info("Full pipeline available at http://localhost:7860/api/pipeline/execute")
    logger.info("API documentation at http://localhost:7860/docs")
    
    uvicorn.run(
        app,
        host=settings.host,
        port=settings.port,
        log_level=settings.log_level.lower(),
    )