import logging
import os

from fastapi import FastAPI, Request
from fastapi.exceptions import RequestValidationError
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from fastapi.staticfiles import StaticFiles
from sqlalchemy import select, text

from src.api.auth import router as auth_router
from src.api.dashboard import router as dashboard_router
from src.api.git_repositories import router as git_repositories_router
from src.api.health import router as health_router
from src.api.projects import router as projects_router
from src.api.ssh_keys import router as ssh_keys_router
from src.api.terminal import router as terminal_router
from src.api.instance_proxy import router as instance_proxy_router
from src.api.tool_configs import router as tool_configs_router
from src.api.tool_instances import router as tool_instances_router
from src.api.tool_instances import sessions_router
from src.api.tool_types import router as tool_types_router
from src.api.user_config import router as user_config_router
from src.api.users import router as users_router
from src.config import Settings
from src.database import SessionLocal, init_database
from src.logging_config import (
    ExceptionLoggingMiddleware,
    RequestLoggingMiddleware,
    configure_logging,
)
from src.models.tool_type import ToolType

# Configure logging early
log_level = os.getenv("LOG_LEVEL", "INFO").upper()
configure_logging(level=getattr(logging, log_level, logging.INFO))

logger = logging.getLogger(__name__)
settings = Settings()
app = FastAPI(title="Headquarter API")

# Configure CORS - must be before other middleware
# Build allowed origins list including web and api domains
cors_origins = [settings.web_base_url]
if settings.api_base_url != settings.web_base_url:
    cors_origins.append(settings.api_base_url)
logger.info("CORS configured with origins: %s", cors_origins)

app.add_middleware(
    CORSMiddleware,
    allow_origins=cors_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.add_middleware(RequestLoggingMiddleware)
app.add_middleware(ExceptionLoggingMiddleware)


@app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request, exc: RequestValidationError):
    """Log validation errors and return detailed response."""
    errors = exc.errors()
    logger.warning(
        "Validation error for %s %s: %s",
        request.method,
        request.url.path,
        errors,
    )
    return JSONResponse(
        status_code=422,
        content={"detail": errors},
    )


async def _table_exists(session, table_name: str) -> bool:
    """Check if a table exists in the database."""
    try:
        result = await session.execute(
            text("""
                SELECT EXISTS (
                    SELECT FROM information_schema.tables
                    WHERE table_schema = 'public'
                    AND table_name = :table_name
                )
            """),
            {"table_name": table_name},
        )
        return result.scalar() or False
    except Exception:
        return False


async def seed_builtin_tool_types():
    async with SessionLocal() as session:
        # Check if tool_types table exists before attempting to seed
        if not await _table_exists(session, "tool_types"):
            logger.warning(
                "tool_types table does not exist. Skipping seeding. "
                "Migrations may not have run yet."
            )
            return

        builtin_types = [
            {
                "name": "code-server",
                "display_name": "VS Code Server",
                "description": "VS Code running in the browser via code-server",
                "category": "editor",
                "interfaces": ["web"],
                "compose_template": """version: "3.8"
services:
  code-server:
    image: lscr.io/linuxserver/code-server:latest
    container_name: {{TOOL_NAME}}
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/London
    volumes:
      - {{REPO_PATH}}:/config/workspace
    ports:
      - "8443:8443"
    restart: unless-stopped""",
                "default_port": 8443,
                "required_variables": ["REPO_PATH", "TOOL_NAME"],
            },
            {
                "name": "jupyter-notebook",
                "display_name": "Jupyter Notebook",
                "description": "Jupyter Lab for interactive development",
                "category": "notebook",
                "interfaces": ["web"],
                "default_port": 8888,
                "compose_template": """version: "3.8"
services:
  jupyter:
    image: jupyter/scipy-notebook:latest
    container_name: {{TOOL_NAME}}
    environment:
      - JUPYTER_ENABLE_LAB=yes
    volumes:
      - {{REPO_PATH}}:/home/jovyan/work
    ports:
      - "8888:8888"
    restart: unless-stopped""",
                "required_variables": ["REPO_PATH", "TOOL_NAME"],
            },
            {
                "name": "opencode",
                "display_name": "OpenCode",
                "description": "AI coding assistant - run opencode in terminal",
                "category": "ai-assistant",
                "interfaces": ["terminal"],
                "default_port": 3000,
                "compose_template": """version: "3.8"
services:
  opencode:
    image: node:20-slim
    container_name: {{TOOL_NAME}}
    working_dir: /workspace
    environment:
      - HOME=/tmp
    volumes:
      - {{REPO_PATH}}:/workspace
      - opencode_home:/tmp
    ports:
      - "3000:3000"
    command: >
      sh -c "set -x &&
             apt-get update && apt-get install -y git ca-certificates &&
             echo 'Installing opencode...' &&
             npm install -g opencode-ai 2>&1 || echo 'ERROR: npm install failed' &&
             which opencode || echo 'ERROR: opencode not in PATH' &&
             npm bin -g &&
             ls -la $(npm bin -g) || echo 'ERROR: global bin dir not found' &&
             echo 'export PATH=\"$(npm bin -g):\$PATH\"' >> /root/.bashrc &&
             echo 'cd /workspace' >> /root/.bashrc &&
             echo 'OpenCode installation complete' &&
             cd /workspace &&
             exec tail -f /dev/null"
    stdin_open: true
    tty: true
    restart: unless-stopped

volumes:
  opencode_home:""",
                "required_variables": ["REPO_PATH", "TOOL_NAME"],
            },
        ]

        for tool_data in builtin_types:
            existing = await session.scalar(select(ToolType).where(ToolType.name == tool_data["name"]))
            if not existing:
                tool_type = ToolType(
                    name=tool_data["name"],
                    display_name=tool_data["display_name"],
                    description=tool_data["description"],
                    category=tool_data["category"],
                    interfaces=tool_data["interfaces"],
                    compose_template=tool_data["compose_template"],
                    required_variables=tool_data["required_variables"],
                    default_port=tool_data.get("default_port"),
                    is_builtin=True,
                )
                session.add(tool_type)
                logger.info("Created built-in tool type: %s", tool_data["name"])
            else:
                # Update existing built-in tool types to reflect code changes
                existing.display_name = tool_data["display_name"]
                existing.description = tool_data["description"]
                existing.category = tool_data["category"]
                existing.interfaces = tool_data["interfaces"]
                existing.compose_template = tool_data["compose_template"]
                existing.required_variables = tool_data["required_variables"]
                existing.default_port = tool_data.get("default_port")
                logger.info("Updated built-in tool type: %s", tool_data["name"])

        await session.commit()
        logger.info("Built-in tool types seeded successfully.")


@app.on_event("startup")
async def on_startup():
    logger.info("Starting up Headquarter API...")

    # Initialize database (run migrations)
    db_ready = await init_database()
    if not db_ready:
        logger.error("Database initialization failed. Shutting down.")
        import sys
        sys.exit(1)

    # Seed built-in data
    await seed_builtin_tool_types()
    logger.info("Startup complete.")

app.include_router(health_router)
app.include_router(auth_router)
app.include_router(dashboard_router)
app.include_router(projects_router)
app.include_router(users_router)
app.include_router(ssh_keys_router)
app.include_router(git_repositories_router)
app.include_router(user_config_router)
app.include_router(tool_types_router)
app.include_router(tool_instances_router)
app.include_router(tool_configs_router)
app.include_router(sessions_router)
app.include_router(instance_proxy_router)
app.include_router(terminal_router)
app.mount("/uploads", StaticFiles(directory="uploads"), name="uploads")