from fastapi import APIRouter, Request, HTTPException
from service_config import ServiceConfig
import datetime
import json

router = APIRouter()
service_config = ServiceConfig()
service_config.load()

def get_utc_now():
    return datetime.datetime.utcnow().isoformat()

@router.get("/list")
def list_projects():
    return service_config.projects

@router.post("/add")
async def add_project(request: Request):
    data = await request.json()
    project_name = data.get("project_name")
    if not project_name:
        raise HTTPException(status_code=400, detail="project_name cannot be empty")
    if project_name in service_config.projects:
        raise HTTPException(status_code=400, detail="Project already exists")

    service_config.projects[project_name] = {
        "enabled": False,
        "versions": [],
        "last_updated": get_utc_now()
    }
    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)
    return {"message": f"Project {project_name} added"}

@router.post("/update")
async def update_project(request: Request):
    data = await request.json()
    project_name = data.get("project_name")
    client_last_updated = data.get("client_last_updated")

    project = service_config.projects.get(project_name)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")

    if project["last_updated"] != client_last_updated:
        raise HTTPException(status_code=409, detail="This record has been updated by another user. Please reload.")

    # örnek update: sadece enable/disable flag güncelliyoruz
    project["enabled"] = data.get("enabled", project["enabled"])

    project["last_updated"] = get_utc_now()
    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)
    return {"message": f"Project {project_name} updated"}

@router.post("/publish")
async def publish_project(request: Request):
    data = await request.json()
    project_name = data.get("project_name")
    client_last_updated = data.get("client_last_updated")

    project = service_config.projects.get(project_name)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")

    if project["last_updated"] != client_last_updated:
        raise HTTPException(status_code=409, detail="This record has been updated by another user. Please reload.")

    latest_version = project["versions"][-1] if project["versions"] else None
    if not latest_version:
        raise HTTPException(status_code=400, detail="No version exists to publish")

    llm = latest_version.get("llm", {})
    if not llm.get("repo_id"):
        raise HTTPException(status_code=400, detail="repo_id is required")
    if llm.get("use_fine_tune") and not llm.get("fine_tune_zip"):
        raise HTTPException(status_code=400, detail="fine_tune_zip is required when use_fine_tune is true")

    latest_version["published"] = True
    latest_version["last_updated"] = get_utc_now()
    project["last_updated"] = get_utc_now()

    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)

    return {"message": f"Project {project_name} version published"}

@router.post("/add_intent")
async def add_intent(request: Request):
    data = await request.json()
    project_name = data.get("project_name")
    version_number = data.get("version_number")
    intent = data.get("intent")
    client_last_updated = data.get("client_last_updated")

    project = service_config.projects.get(project_name)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")

    if project["last_updated"] != client_last_updated:
        raise HTTPException(status_code=409, detail="This record has been updated by another user. Please reload.")

    version = next((v for v in project["versions"] if v["version_number"] == version_number), None)
    if not version:
        raise HTTPException(status_code=404, detail="Version not found")

    if any(i["name"] == intent["name"] for i in version.get("intents", [])):
        raise HTTPException(status_code=400, detail="Intent already exists")

    version.setdefault("intents", []).append(intent)
    version["last_updated"] = get_utc_now()
    project["last_updated"] = get_utc_now()

    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)

    return {"message": f"Intent {intent['name']} added to project {project_name}, version {version_number}"}

@router.post("/delete_intent")
async def delete_intent(request: Request):
    data = await request.json()
    project_name = data.get("project_name")
    version_number = data.get("version_number")
    intent_name = data.get("intent_name")
    client_last_updated = data.get("client_last_updated")

    project = service_config.projects.get(project_name)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")

    if project["last_updated"] != client_last_updated:
        raise HTTPException(status_code=409, detail="This record has been updated by another user. Please reload.")

    version = next((v for v in project["versions"] if v["version_number"] == version_number), None)
    if not version:
        raise HTTPException(status_code=404, detail="Version not found")

    version["intents"] = [i for i in version.get("intents", []) if i["name"] != intent_name]
    version["last_updated"] = get_utc_now()
    project["last_updated"] = get_utc_now()

    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)

    return {"message": f"Intent {intent_name} deleted from project {project_name}, version {version_number}"}

@router.post("/add_api")
async def add_api(request: Request):
    data = await request.json()
    api_name = data.get("api_name")
    api_def = data.get("api_def")

    if api_name in service_config.apis:
        raise HTTPException(status_code=400, detail="API already exists")

    service_config.apis[api_name] = api_def

    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)

    return {"message": f"API {api_name} added"}

@router.post("/delete_api")
async def delete_api(request: Request):
    data = await request.json()
    api_name = data.get("api_name")
    if api_name not in service_config.apis:
        raise HTTPException(status_code=404, detail="API not found")

    del service_config.apis[api_name]

    with open(service_config.config_path, "w", encoding="utf-8") as f:
        json.dump(service_config, f, indent=2)

    return {"message": f"API {api_name} deleted"}