from typing import Any

import httpx

from app.services.providers.base import Provider, ProviderConnection


class ProxmoxProvider(Provider):
    name = "proxmox"

    def auth_header(self, token: str) -> str:
        token = token.strip()
        if token.startswith("PVEAPIToken="):
            return token
        return f"PVEAPIToken={token}"

    async def test_connection(self, connection: ProviderConnection) -> dict[str, Any]:
        headers = {"Authorization": self.auth_header(connection.token)}
        async with httpx.AsyncClient(verify=connection.verify_tls, timeout=10) as client:
            response = await client.get(
                f"{connection.api_url.rstrip('/')}/api2/json/version",
                headers=headers,
            )
            response.raise_for_status()
            return response.json().get("data", {})

    async def sync_inventory(self, connection: ProviderConnection) -> dict[str, list[dict[str, Any]]]:
        base_url = connection.api_url.rstrip("/")
        headers = {"Authorization": self.auth_header(connection.token)}
        async with httpx.AsyncClient(verify=connection.verify_tls, timeout=20) as client:
            resources = await client.get(
                f"{base_url}/api2/json/cluster/resources",
                headers=headers,
            )
            resources.raise_for_status()
            data = resources.json().get("data", [])

        nodes = [item for item in data if item.get("type") == "node"]
        workloads = [item for item in data if item.get("type") in {"qemu", "lxc"}]
        async with httpx.AsyncClient(verify=connection.verify_tls, timeout=8) as client:
            for workload in workloads:
                await self.enrich_workload_ips(client, base_url, headers, workload)
        networks = await self.list_networks(connection)
        return {"nodes": nodes, "workloads": workloads, "networks": networks}

    async def enrich_workload_ips(
        self,
        client: httpx.AsyncClient,
        base_url: str,
        headers: dict[str, str],
        workload: dict[str, Any],
    ) -> None:
        node = workload.get("node")
        vmid = workload.get("vmid")
        kind = workload.get("type")
        workload["ip_addresses"] = []
        if not node or not vmid:
            return

        if kind == "qemu":
            try:
                response = await client.get(
                    f"{base_url}/api2/json/nodes/{node}/qemu/{vmid}/agent/network-get-interfaces",
                    headers=headers,
                )
                if response.status_code >= 400:
                    return
                interfaces = response.json().get("data", {}).get("result", [])
                for interface in interfaces:
                    for address in interface.get("ip-addresses", []):
                        ip_address = address.get("ip-address")
                        prefix = address.get("prefix")
                        if ip_address and ":" not in ip_address and prefix is not None:
                            workload["ip_addresses"].append(f"{ip_address}/{prefix}")
            except httpx.HTTPError:
                return

        if kind == "lxc":
            try:
                response = await client.get(
                    f"{base_url}/api2/json/nodes/{node}/lxc/{vmid}/config",
                    headers=headers,
                )
                if response.status_code >= 400:
                    return
                config = response.json().get("data", {})
                for key, value in config.items():
                    if key.startswith("net") and isinstance(value, str):
                        for part in value.split(","):
                            if part.startswith("ip="):
                                ip_address = part.removeprefix("ip=")
                                if ip_address != "dhcp" and ":" not in ip_address:
                                    workload["ip_addresses"].append(ip_address)
            except httpx.HTTPError:
                return

    async def list_networks(self, connection: ProviderConnection) -> list[dict[str, Any]]:
        headers = {"Authorization": self.auth_header(connection.token)}
        async with httpx.AsyncClient(verify=connection.verify_tls, timeout=20) as client:
            resources = await client.get(
                f"{connection.api_url.rstrip('/')}/api2/json/cluster/resources",
                headers=headers,
            )
            resources.raise_for_status()
            data = resources.json().get("data", [])
        return [item for item in data if item.get("type") in {"network", "sdn"}]

    async def preview_rules(self, connection: ProviderConnection, rules: list[dict[str, Any]]) -> dict[str, Any]:
        return {
            "provider": self.name,
            "read_only": connection.read_only,
            "generated": rules,
            "warnings": ["Preview only. No Proxmox firewall changes were sent."],
        }

    async def apply_rules(self, connection: ProviderConnection, rules: list[dict[str, Any]]) -> dict[str, Any]:
        if connection.read_only:
            return {"applied": False, "reason": "Cluster is read-only", "rules": rules}
        return {"applied": False, "reason": "Apply adapter intentionally requires explicit implementation", "rules": rules}