import asyncio
import json
from pathlib import Path
from typing import Dict, List, Optional
from datetime import datetime
from collections import deque

from fastapi import FastAPI, HTTPException, Request, BackgroundTasks, UploadFile, File
from fastapi.staticfiles import StaticFiles
from fastapi.responses import HTMLResponse
from pydantic import BaseModel
import uvicorn
import sys

app = FastAPI(title="Pipeline Dashboard")

BASE_DIR = Path(__file__).parent
OUTPUT_DIR = BASE_DIR / "output"
DB_PATH = BASE_DIR / "db_requirements.json"
PROMPTS_DIR = BASE_DIR / "prompts"

# In-memory storage for active runs
class ActiveRun:
    def __init__(self):
        self.process: Optional[asyncio.subprocess.Process] = None
        self.logs: deque = deque(maxlen=200)  # Keep last 200 lines
        self.status: str = "starting"
        self.start_time: str = datetime.now().isoformat()

active_runs: Dict[int, ActiveRun] = {}

@app.post("/api/requirements/{index}/upload_source_ex")
async def upload_source_ex(index: int, file: UploadFile = File(...)):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str / "raw_cases"
    dir_path.mkdir(parents=True, exist_ok=True)
    
    file_path = dir_path / "source_ex.json"
    content = await file.read()
    with open(file_path, "wb") as f:
        f.write(content)
        
    return {"status": "success", "filename": "source_ex.json"}

class RunRequest(BaseModel):
    platforms: Optional[str] = None
    use_claude_sdk: bool = False
    restart_mode: Optional[str] = None
    phase: Optional[int] = None
    only_step: Optional[str] = None
    start_from: Optional[str] = None
    end_at: Optional[str] = None
    case_index: Optional[int] = None

class MemoRequest(BaseModel):
    memo: str

class RequirementUpdateRequest(BaseModel):
    requirement: str

class PromptRequest(BaseModel):
    content: str
    schema_content: Optional[str] = None

class ImportExternalRequest(BaseModel):
    case_id: str

class CaseFilterRequest(BaseModel):
    case_id: str
    reason: Optional[str] = "manual_delete"

@app.post("/api/requirements/{index}/import_source_ex")
def import_source_ex(index: int, req: ImportExternalRequest):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str / "raw_cases"
    source_ex_path = dir_path / "source_ex.json"
    source_path = dir_path / "source.json"
    
    if not source_ex_path.exists():
        raise HTTPException(status_code=404, detail="source_ex.json not found")
        
    with open(source_ex_path, "r", encoding="utf-8") as f:
        ex_data = json.load(f)
        
    ex_cases = ex_data if isinstance(ex_data, list) else (ex_data.get("cases") or ex_data.get("sources") or [])
    
    target_case = None
    for c in ex_cases:
        cId = c.get("case_id") or (c.get("_raw") and c["_raw"].get("case_id")) or (c.get("post") and c["post"].get("channel_content_id"))
        if cId == req.case_id:
            target_case = c
            break
            
    if not target_case:
        raise HTTPException(status_code=404, detail="Case not found in external sources")
        
    source_cases = []
    if source_path.exists():
        with open(source_path, "r", encoding="utf-8") as f:
            s_data = json.load(f)
            source_cases = s_data if isinstance(s_data, list) else (s_data.get("cases") or s_data.get("sources") or [])
            
    # Check if already exists
    for c in source_cases:
        cId = c.get("case_id") or (c.get("_raw") and c["_raw"].get("case_id")) or (c.get("post") and c["post"].get("channel_content_id"))
        if cId == req.case_id:
            return {"status": "success", "message": "Already imported"}
            
    # Append
    source_cases.append(target_case)
    
    with open(source_path, "w", encoding="utf-8") as f:
        # Save as object format for source.json
        json.dump({"total": len(source_cases), "sources": source_cases}, f, ensure_ascii=False, indent=2)
        
    return {"status": "success"}

@app.post("/api/requirements/{index}/import_all_source_ex")
def import_all_source_ex(index: int):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str / "raw_cases"
    source_ex_path = dir_path / "source_ex.json"
    source_path = dir_path / "source.json"
    
    if not source_ex_path.exists():
        raise HTTPException(status_code=404, detail="source_ex.json not found")
        
    with open(source_ex_path, "r", encoding="utf-8") as f:
        ex_data = json.load(f)
        
    ex_cases = ex_data if isinstance(ex_data, list) else (ex_data.get("cases") or ex_data.get("sources") or [])
    
    source_cases = []
    if source_path.exists():
        with open(source_path, "r", encoding="utf-8") as f:
            s_data = json.load(f)
            source_cases = s_data if isinstance(s_data, list) else (s_data.get("cases") or s_data.get("sources") or [])
            
    existing_ids = set()
    for c in source_cases:
        cId = c.get("case_id") or (c.get("_raw") and c["_raw"].get("case_id")) or (c.get("post") and c["post"].get("channel_content_id"))
        if cId:
            existing_ids.add(cId)
            
    added_count = 0
    for c in ex_cases:
        cId = c.get("case_id") or (c.get("_raw") and c["_raw"].get("case_id")) or (c.get("post") and c["post"].get("channel_content_id"))
        if cId and cId not in existing_ids:
            source_cases.append(c)
            existing_ids.add(cId)
            added_count += 1
            
    if added_count > 0:
        with open(source_path, "w", encoding="utf-8") as f:
            json.dump({"total": len(source_cases), "sources": source_cases}, f, ensure_ascii=False, indent=2)
            
    return {"status": "success", "count": added_count}


@app.get("/api/requirements")
def get_requirements():
    if not DB_PATH.exists():
        raise HTTPException(status_code=404, detail="db_requirements.json not found")
        
    with open(DB_PATH, "r", encoding="utf-8") as f:
        reqs = json.load(f)
        
    results = []
    for i, req in enumerate(reqs):
        idx_str = f"{(i+1):03d}"
        dir_path = OUTPUT_DIR / idx_str
        
        has_strategy = (dir_path / "strategy.json").exists()
        has_blueprint = (dir_path / "blueprint.json").exists()
        has_caps = (dir_path / "capabilities_extracted.json").exists()
        
        raw_cases_count = 0
        case_json_path = dir_path / "case.json"
        if case_json_path.exists():
            try:
                with open(case_json_path, 'r', encoding='utf-8') as f:
                    case_data = json.load(f)
                    raw_cases_count = len(case_data.get('cases', []))
            except Exception:
                pass
        
        if raw_cases_count == 0:
            raw_cases_dir = dir_path / "raw_cases"
            if raw_cases_dir.exists():
                raw_cases_count = len(list(raw_cases_dir.glob("case_*.json")))
            
        status = "completed" if has_strategy else ("partial" if raw_cases_count > 0 else "pending")
        if i in active_runs and active_runs[i].status == "running":
            status = "running"
            
        memo_content = ""
        memo_path = dir_path / "memo.txt"
        if memo_path.exists():
            with open(memo_path, "r", encoding="utf-8") as fm:
                memo_content = fm.read().strip()

        results.append({
            "index": i,
            "id": idx_str,
            "requirement": req,
            "status": status,
            "has_strategy": has_strategy,
            "has_blueprint": has_blueprint,
            "has_caps": has_caps,
            "raw_cases_count": raw_cases_count,
            "memo": memo_content
        })
        
    return results

@app.put("/api/requirements/{index}")
def update_requirement(index: int, req: RequirementUpdateRequest):
    if not DB_PATH.exists():
        raise HTTPException(status_code=404, detail="db_requirements.json not found")
        
    with open(DB_PATH, "r", encoding="utf-8") as f:
        reqs = json.load(f)
        
    if index < 0 or index >= len(reqs):
        raise HTTPException(status_code=404, detail="Requirement index out of range")
        
    reqs[index] = req.requirement
    
    with open(DB_PATH, "w", encoding="utf-8") as f:
        json.dump(reqs, f, ensure_ascii=False, indent=2)
        
    return {"status": "success", "requirement": req.requirement}

@app.post("/api/requirements/{index}/cases/filter")
def filter_case(index: int, req: CaseFilterRequest):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str / "raw_cases"
    source_path = dir_path / "source.json"
    filtered_path = dir_path / "filtered_cases.json"
    
    if not source_path.exists():
        raise HTTPException(status_code=404, detail="source.json not found")
        
    with open(source_path, "r", encoding="utf-8") as f:
        source_data = json.load(f)
        
    target_case = None
    new_sources = []
    for c in source_data.get("sources", []):
        c_id = c.get("case_id") or (c.get("_raw", {}).get("case_id")) or (c.get("post", {}).get("channel_content_id"))
        if c_id == req.case_id:
            target_case = c
        else:
            new_sources.append(c)
            
    if not target_case:
        raise HTTPException(status_code=404, detail="Case not found in source.json")
        
    source_data["sources"] = new_sources
    source_data["total"] = len(new_sources)
    with open(source_path, "w", encoding="utf-8") as f:
        json.dump(source_data, f, ensure_ascii=False, indent=2)
        
    filtered_data = {"total": 0, "by_reason": {}}
    if filtered_path.exists():
        with open(filtered_path, "r", encoding="utf-8") as f:
            filtered_data = json.load(f)
            
    reason = req.reason or "manual_delete"
    if reason not in filtered_data["by_reason"]:
        filtered_data["by_reason"][reason] = {"total": 0, "sources": []}
        
    # Copy and add filter_reason
    target_case["filter_reason"] = reason
    filtered_data["by_reason"][reason]["sources"].append(target_case)
    filtered_data["by_reason"][reason]["total"] = len(filtered_data["by_reason"][reason]["sources"])
    
    total_filtered = sum(r.get("total", 0) for r in filtered_data["by_reason"].values())
    filtered_data["total"] = total_filtered
    
    with open(filtered_path, "w", encoding="utf-8") as f:
        json.dump(filtered_data, f, ensure_ascii=False, indent=2)
        
    # Also attempt to remove from case.json if it exists
    case_path = dir_path.parent / "case.json"
    if case_path.exists():
        with open(case_path, "r", encoding="utf-8") as f:
            case_data = json.load(f)
        if "cases" in case_data:
            original_len = len(case_data["cases"])
            case_data["cases"] = [c for c in case_data["cases"] if c.get("case_id") != req.case_id and c.get("_raw", {}).get("case_id") != req.case_id]
            if len(case_data["cases"]) != original_len:
                with open(case_path, "w", encoding="utf-8") as f:
                    json.dump(case_data, f, ensure_ascii=False, indent=2)
        
    return {"status": "success"}

@app.post("/api/requirements/{index}/cases/restore")
def restore_case(index: int, req: CaseFilterRequest):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str / "raw_cases"
    source_path = dir_path / "source.json"
    filtered_path = dir_path / "filtered_cases.json"
    
    if not filtered_path.exists():
        raise HTTPException(status_code=404, detail="filtered_cases.json not found")
        
    with open(filtered_path, "r", encoding="utf-8") as f:
        filtered_data = json.load(f)
        
    target_case = None
    # Find and remove
    for reason, reason_obj in filtered_data.get("by_reason", {}).items():
        new_sources = []
        for c in reason_obj.get("sources", []):
            c_id = c.get("case_id") or (c.get("_raw", {}).get("case_id")) or (c.get("post", {}).get("channel_content_id"))
            if c_id == req.case_id:
                target_case = c
            else:
                new_sources.append(c)
        if target_case:
            reason_obj["sources"] = new_sources
            reason_obj["total"] = len(new_sources)
            break
            
    if not target_case:
        raise HTTPException(status_code=404, detail="Case not found in filtered_cases.json")
        
    total_filtered = sum(r.get("total", 0) for r in filtered_data.get("by_reason", {}).values())
    filtered_data["total"] = total_filtered
    
    with open(filtered_path, "w", encoding="utf-8") as f:
        json.dump(filtered_data, f, ensure_ascii=False, indent=2)
        
    source_data = {"total": 0, "sources": []}
    if source_path.exists():
        with open(source_path, "r", encoding="utf-8") as f:
            source_data = json.load(f)
            
    # Clean up filter_reason
    target_case.pop("filter_reason", None)
    
    source_data["sources"].append(target_case)
    source_data["total"] = len(source_data["sources"])
    
    with open(source_path, "w", encoding="utf-8") as f:
        json.dump(source_data, f, ensure_ascii=False, indent=2)
        
    # Note: We do not automatically inject it back into case.json because case.json 
    # requires format normalization (which generate_case.py does). The user must rerun step 1.6.
        
    return {"status": "success"}

@app.post("/api/requirements/{index}/upload_cluster")
async def upload_cluster(index: int, file: UploadFile = File(...)):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str
    dir_path.mkdir(parents=True, exist_ok=True)
    cluster_path = dir_path / "cluster.json"
    
    content = await file.read()
    try:
        json_data = json.loads(content)
        
        # Load existing data or start new list
        existing_data = []
        if cluster_path.exists():
            with open(cluster_path, "r", encoding="utf-8") as f:
                try:
                    existing = json.load(f)
                    if isinstance(existing, list):
                        existing_data = existing
                    else:
                        existing_data = [existing] # Wrap old format
                except:
                    pass
                    
        existing_data.append(json_data)
        
        with open(cluster_path, "w", encoding="utf-8") as f:
            json.dump(existing_data, f, ensure_ascii=False, indent=2)
            
        return {"status": "success"}
    except Exception as e:
        raise HTTPException(status_code=400, detail=f"Invalid JSON: {str(e)}")

@app.post("/api/requirements/{index}/save_cluster")
async def save_cluster(index: int, request: Request):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str
    dir_path.mkdir(parents=True, exist_ok=True)
    cluster_path = dir_path / "cluster.json"
    
    try:
        data = await request.json()
        with open(cluster_path, "w", encoding="utf-8") as f:
            json.dump(data, f, ensure_ascii=False, indent=2)
        return {"status": "success"}
    except Exception as e:
        raise HTTPException(status_code=400, detail=f"Failed to save JSON: {str(e)}")

@app.post("/api/requirements")
def add_requirement(req: RequirementUpdateRequest):
    if not DB_PATH.exists():
        raise HTTPException(status_code=404, detail="db_requirements.json not found")
        
    with open(DB_PATH, "r", encoding="utf-8") as f:
        reqs = json.load(f)
        
    reqs.append(req.requirement)
    new_index = len(reqs) - 1
    
    with open(DB_PATH, "w", encoding="utf-8") as f:
        json.dump(reqs, f, ensure_ascii=False, indent=2)
        
    # Pre-create output directory
    idx_str = f"{(new_index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str
    dir_path.mkdir(parents=True, exist_ok=True)
    
    return {"status": "success", "index": new_index, "requirement": req.requirement}

@app.get("/api/requirements/{index}/data")
def get_requirement_data(index: int):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str
    
    def safe_load_json(p: Path):
        if not p.exists():
            return None
        content = ""
        try:
            with open(p, "r", encoding="utf-8") as f:
                content = f.read()
                return json.loads(content)
        except Exception as e:
            return {"error": "Failed to parse JSON", "raw_content": content, "details": str(e)}

    data = {
        "strategy": safe_load_json(dir_path / "strategy.json"),
        "blueprint": safe_load_json(dir_path / "process.json") or safe_load_json(dir_path / "blueprint.json"),
        "blueprint_temp": safe_load_json(dir_path / "blueprint_temp.json"),
        "cluster": safe_load_json(dir_path / "cluster.json"),
        "capabilities": safe_load_json(dir_path / "capabilities.json") or safe_load_json(dir_path / "capabilities_extracted.json"),
        "capabilities_temp": safe_load_json(dir_path / "capabilities_temp.json"),
        "raw_cases": {
            "case": safe_load_json(dir_path / "case.json")
        }
    }
    
    raw_cases_dir = dir_path / "raw_cases"
    if raw_cases_dir.exists():
        for f in raw_cases_dir.glob("*.json"):
            data["raw_cases"][f.stem] = safe_load_json(f)
            
    return data

@app.get("/api/requirements/{index}/memo")
def get_memo(index: int):
    idx_str = f"{(index+1):03d}"
    memo_path = OUTPUT_DIR / idx_str / "memo.txt"
    if memo_path.exists():
        with open(memo_path, "r", encoding="utf-8") as f:
            return {"memo": f.read()}
    return {"memo": ""}

@app.get("/api/requirements/{index}/pipeline-status")
def get_pipeline_status(index: int):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str
    raw_cases_dir = dir_path / "raw_cases"
    
    status = {
        "research": False,
        "source": False,
        "generate-case": False,
        "workflow-extract": False,
        "capability-extract-1": False,
        "process-cluster": False,
        "process-score": False,
        "capability-extract": False,
        "capability-enrich": False,
        "strategy": False
    }
    
    if raw_cases_dir.exists():
        if list(raw_cases_dir.glob("case_*.json")):
            status["research"] = True
        if (raw_cases_dir / "source.json").exists():
            status["source"] = True
            
        case_file = dir_path / "case.json"
        legacy_detailed = raw_cases_dir / "case_detailed.json"
        
        has_workflow = False
        has_capability = False
        
        if case_file.exists():
            status["generate-case"] = True
            try:
                with open(case_file, "r", encoding="utf-8") as f:
                    cdata = json.load(f)
                    if cdata.get("cases"):
                        for c in cdata["cases"]:
                            if c.get("workflow"):
                                has_workflow = True
                            if c.get("capability"):
                                has_capability = True
                            if has_workflow and has_capability:
                                break
            except Exception:
                pass
                
        if legacy_detailed.exists():
            status["generate-case"] = True
            has_workflow = True
            
        if has_workflow:
            status["workflow-extract"] = True
        if has_capability:
            status["capability-extract-1"] = True
            
    if (dir_path / "blueprint_temp.json").exists():
        status["process-cluster"] = True
    if (dir_path / "process.json").exists():
        status["process-score"] = True
    if (dir_path / "capabilities_temp.json").exists():
        status["capability-extract"] = True
    if (dir_path / "capabilities.json").exists():
        status["capability-enrich"] = True
    if (dir_path / "strategy.json").exists():
        status["strategy"] = True
        
    return status

@app.post("/api/requirements/{index}/memo")
def save_memo(index: int, req: MemoRequest):
    idx_str = f"{(index+1):03d}"
    dir_path = OUTPUT_DIR / idx_str
    dir_path.mkdir(parents=True, exist_ok=True)
    memo_path = dir_path / "memo.txt"
    with open(memo_path, "w", encoding="utf-8") as f:
        f.write(req.memo)
    return {"status": "ok"}

@app.get("/api/prompts")
def list_prompts():
    if not PROMPTS_DIR.exists():
        return []
    return [f.name for f in PROMPTS_DIR.glob("*.prompt")]

@app.get("/api/prompts/{name}")
def get_prompt(name: str):
    if "/" in name or "\\" in name:
        raise HTTPException(status_code=400, detail="Invalid prompt name")
    prompt_path = PROMPTS_DIR / name
    if not prompt_path.exists() or not prompt_path.is_file():
        raise HTTPException(status_code=404, detail="Prompt not found")
        
    schema_name = name.replace(".prompt", ".schema.json")
    schema_path = PROMPTS_DIR / schema_name
    
    schema_content = ""
    if schema_path.exists() and schema_path.is_file():
        with open(schema_path, "r", encoding="utf-8") as f:
            schema_content = f.read()

    with open(prompt_path, "r", encoding="utf-8") as f:
        return {"content": f.read(), "schema_content": schema_content}

@app.post("/api/prompts/{name}")
def save_prompt(name: str, req: PromptRequest):
    if "/" in name or "\\" in name:
        raise HTTPException(status_code=400, detail="Invalid prompt name")
    prompt_path = PROMPTS_DIR / name
    if not prompt_path.exists() or not prompt_path.is_file():
        raise HTTPException(status_code=404, detail="Prompt not found")
        
    schema_name = name.replace(".prompt", ".schema.json")
    schema_path = PROMPTS_DIR / schema_name
    
    if req.schema_content is not None:
        if req.schema_content.strip():
            try:
                parsed_schema = json.loads(req.schema_content)
            except Exception as e:
                raise HTTPException(status_code=400, detail=f"Invalid Schema JSON: {str(e)}")
            with open(schema_path, "w", encoding="utf-8") as f:
                json.dump(parsed_schema, f, ensure_ascii=False, indent=2)
        else:
            if schema_path.exists():
                schema_path.unlink() # remove if empty
                
    with open(prompt_path, "w", encoding="utf-8", newline="\n") as f:
        # Enforce Unix LF line endings to avoid unnecessary git diffs
        # and format inconsistencies between the file system and UI.
        f.write(req.content.replace('\r\n', '\n'))
    return {"status": "ok"}

@app.post("/api/prompts/{name}/update_schema")
async def api_update_schema(name: str):
    if "/" in name or "\\" in name:
        raise HTTPException(status_code=400, detail="Invalid prompt name")
    prompt_name = name.replace(".prompt", "")
    
    from script.update_schema import update_schema as script_update_schema
    try:
        # Calls the script to update the schema (this writes to the file)
        await script_update_schema(prompt_name=prompt_name, model="openai/gpt-5.4", dry_run=False)
        
        schema_name = name.replace(".prompt", ".schema.json")
        schema_path = PROMPTS_DIR / schema_name
        
        schema_content = ""
        if schema_path.exists() and schema_path.is_file():
            with open(schema_path, "r", encoding="utf-8") as f:
                schema_content = f.read()
                
        return {"status": "ok", "schema_content": schema_content}
    except Exception as e:
        import traceback
        traceback.print_exc()
        raise HTTPException(status_code=500, detail=f"Failed to update schema: {str(e)}")


async def run_pipeline_task(index: int, run_req: RunRequest):
    run_state = active_runs[index]
    run_state.status = "running"
    
    dir_path = OUTPUT_DIR / f"{(index+1):03d}"
    
    # We no longer manually delete files here for most modes, 
    # run_pipeline.py handles overwriting when --only-step or --start-from is passed.
    
    # build command
    script_path = BASE_DIR / "run_pipeline.py"
    cmd = [sys.executable, str(script_path), "--index", str(index)]
    
    if run_req.platforms:
        cmd.extend(["--platforms", run_req.platforms])
    if run_req.use_claude_sdk:
        cmd.append("--use-claude-sdk")
        
    if run_req.only_step:
        cmd.extend(["--only-step", run_req.only_step])
        if run_req.case_index is not None:
            cmd.extend(["--case-index", str(run_req.case_index)])
    elif run_req.phase is not None:
        cmd.extend(["--phase", str(run_req.phase)])
    else:
        if run_req.start_from:
            cmd.extend(["--start-from", run_req.start_from])
        if run_req.end_at:
            cmd.extend(["--end-at", run_req.end_at])
        if run_req.restart_mode and run_req.restart_mode == "smart":
            pass # Smart mode requires no extra args
        
    run_state.logs.append(f"Starting command: {' '.join(cmd)}\n")
    
    import threading
    import subprocess
    import os
    
    def run_process():
        try:
            process = subprocess.Popen(
                cmd,
                stdout=subprocess.PIPE,
                stderr=subprocess.STDOUT,
                text=True,
                encoding="utf-8",
                bufsize=1,
                cwd=str(BASE_DIR),
                env=dict(os.environ, PYTHONIOENCODING="utf-8")
            )
            run_state.process = process
            
            for line in iter(process.stdout.readline, ''):
                if line:
                    run_state.logs.append(line)
            
            process.stdout.close()
            return_code = process.wait()
            
            run_state.logs.append(f"\nProcess exited with code {return_code}")
            run_state.status = "completed" if return_code == 0 else "failed"
        except Exception as e:
            run_state.logs.append(f"\nException occurred: {repr(e)}")
            run_state.status = "failed"
            
    thread = threading.Thread(target=run_process)
    thread.start()

@app.post("/api/pipeline/run/{index}")
async def trigger_pipeline(index: int, req: RunRequest):
    if index in active_runs and active_runs[index].status == "running":
        raise HTTPException(status_code=400, detail="Pipeline already running for this index")
    
    active_runs[index] = ActiveRun()
    asyncio.create_task(run_pipeline_task(index, req))
    return {"message": "Pipeline started", "index": index}

@app.post("/api/pipeline/stop/{index}")
async def stop_pipeline(index: int):
    if index not in active_runs or active_runs[index].status != "running":
        raise HTTPException(status_code=400, detail="No running pipeline found for this index")
    
    process = active_runs[index].process
    if process:
        try:
            process.terminate()
            active_runs[index].logs.append("\n[System] 🛑 Pipeline forcefully terminated by user.\n")
            active_runs[index].status = "failed"
            return {"status": "stopped"}
        except Exception as e:
            raise HTTPException(status_code=500, detail=f"Failed to terminate: {str(e)}")
    raise HTTPException(status_code=500, detail="Process handle missing")

@app.get("/api/pipeline/status")
def get_all_status():
    res = {}
    for idx, run in active_runs.items():
        res[idx] = {
            "status": run.status,
            "start_time": run.start_time,
            "logs": list(run.logs)
        }
    return res

# Mount UI static files
ui_dir = BASE_DIR / "ui"
ui_dir.mkdir(exist_ok=True)
app.mount("/static", StaticFiles(directory=str(ui_dir)), name="static")

# Mount output directory for local resources (like images)
app.mount("/output", StaticFiles(directory=str(OUTPUT_DIR)), name="output")

@app.get("/")
def serve_ui():
    index_html = ui_dir / "index.html"
    if not index_html.exists():
        return HTMLResponse("UI not found. Please create ui/index.html", status_code=404)
    with open(index_html, "r", encoding="utf-8") as f:
        return HTMLResponse(f.read())

if __name__ == "__main__":
    print("Starting Pipeline Dashboard server on http://127.0.0.0:18080")
    uvicorn.run("server:app", host="0.0.0.0", port=18080, reload=False)