from __future__ import annotations

from uuid import uuid4

from sqlalchemy.orm import Session

from app.core.time import format_now
from app.models.app_metadata import AppMetadata
from app.repositories.metadata_repository import AppMetadataRepository


class MetadataService:
    DEMO_ITEMS = [
        {
            "app_code": "order-service",
            "env": "test",
            "process_name": "java",
            "command_contains": "order-service",
            "health_check_url": "http://127.0.0.1:18080/actuator/health",
            "log_path": "sample-apps/order-service/runtime/logs/order-service.log",
            "listen_port": 18080,
            "startup_keyword": "Started order-service",
        },
        {
            "app_code": "order-service",
            "env": "prod",
            "process_name": "java",
            "command_contains": "order-service",
            "health_check_url": "http://order-service.prod.demo/actuator/health",
            "log_path": "logs/order-service.log",
            "listen_port": 8080,
            "startup_keyword": "Started order-service",
        },
        {
            "app_code": "payment-service",
            "env": "test",
            "process_name": "java",
            "command_contains": "payment-service",
            "health_check_url": "http://payment-service.test.demo/actuator/health",
            "log_path": "logs/payment-service.log",
            "listen_port": 8081,
            "startup_keyword": "Started payment-service",
        },
    ]

    def __init__(self, db: Session, timezone_name: str) -> None:
        self.db = db
        self.timezone_name = timezone_name
        self.repository = AppMetadataRepository(db)

    def ensure_demo_metadata(self) -> None:
        for item in self.DEMO_ITEMS:
            existing = self.repository.get_by_app_env(item["app_code"], item["env"])
            if existing:
                continue
            current_time = format_now(self.timezone_name)
            self.repository.add(
                AppMetadata(
                    app_metadata_id=f"app-meta-{uuid4().hex[:12]}",
                    app_code=item["app_code"],
                    env=item["env"],
                    process_name=item["process_name"],
                    command_contains=item["command_contains"],
                    health_check_url=item["health_check_url"],
                    log_path=item["log_path"],
                    listen_port=item["listen_port"],
                    startup_keyword=item["startup_keyword"],
                    created_at=current_time,
                    updated_at=current_time,
                )
            )

    def get_app_metadata(self, app_code: str | None, env: str | None) -> AppMetadata | None:
        if not app_code or not env:
            return None
        return self.repository.get_by_app_env(app_code, env)