from __future__ import annotations

from fastapi import APIRouter, Header, HTTPException
from fastapi.concurrency import run_in_threadpool
from pydantic import BaseModel, Field

from services.auth_service import auth_service

from api.support import (
    require_admin,
    sanitize_cpa_pool,
    sanitize_cpa_pools,
    sanitize_sub2api_server,
    sanitize_sub2api_servers,
)
from services.account_service import account_service
from services.cpa_service import cpa_config, cpa_import_service, list_remote_files
from services.sub2api_service import (
    list_remote_accounts as sub2api_list_remote_accounts,
    list_remote_groups as sub2api_list_remote_groups,
    sub2api_config,
    sub2api_import_service,
)



class UserKeyCreateRequest(BaseModel):
    name: str = ""


class UserKeyUpdateRequest(BaseModel):
    name: str | None = None
    enabled: bool | None = None
    key: str | None = None


class AccountCreateRequest(BaseModel):
    tokens: list[str] = Field(default_factory=list)


class AccountDeleteRequest(BaseModel):
    tokens: list[str] = Field(default_factory=list)


class AccountRefreshRequest(BaseModel):
    access_tokens: list[str] = Field(default_factory=list)


class AccountUpdateRequest(BaseModel):
    access_token: str = ""
    type: str | None = None
    status: str | None = None
    quota: int | None = None


class CPAPoolCreateRequest(BaseModel):
    name: str = ""
    base_url: str = ""
    secret_key: str = ""


class CPAPoolUpdateRequest(BaseModel):
    name: str | None = None
    base_url: str | None = None
    secret_key: str | None = None


class CPAImportRequest(BaseModel):
    names: list[str] = Field(default_factory=list)


class Sub2APIServerCreateRequest(BaseModel):
    name: str = ""
    base_url: str = ""
    email: str = ""
    password: str = ""
    api_key: str = ""
    group_id: str = ""


class Sub2APIServerUpdateRequest(BaseModel):
    name: str | None = None
    base_url: str | None = None
    email: str | None = None
    password: str | None = None
    api_key: str | None = None
    group_id: str | None = None


class Sub2APIImportRequest(BaseModel):
    account_ids: list[str] = Field(default_factory=list)


def create_router() -> APIRouter:
    router = APIRouter()

    @router.get("/api/auth/users")
    async def list_user_keys(authorization: str | None = Header(default=None)):
        require_admin(authorization)
        return {"items": auth_service.list_keys(role="user")}

    @router.post("/api/auth/users")
    async def create_user_key(body: UserKeyCreateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        try:
            item, raw_key = auth_service.create_key(role="user", name=body.name)
        except ValueError as exc:
            raise HTTPException(status_code=400, detail={"error": str(exc)}) from exc
        return {"item": item, "key": raw_key, "items": auth_service.list_keys(role="user")}

    @router.post("/api/auth/users/{key_id}")
    async def update_user_key(
            key_id: str,
            body: UserKeyUpdateRequest,
            authorization: str | None = Header(default=None),
    ):
        require_admin(authorization)
        updates = {
            key: value
            for key, value in {
                "name": body.name,
                "enabled": body.enabled,
                "key": body.key,
            }.items()
            if value is not None
        }
        if not updates:
            raise HTTPException(status_code=400, detail={"error": "还没有检测到改动，请修改后再保存"})
        try:
            item = auth_service.update_key(key_id, updates, role="user")
        except ValueError as exc:
            raise HTTPException(status_code=400, detail={"error": str(exc)}) from exc
        if item is None:
            raise HTTPException(status_code=404, detail={"error": "这条用户密钥不存在，可能已经被删除"})
        return {"item": item, "items": auth_service.list_keys(role="user")}

    @router.delete("/api/auth/users/{key_id}")
    async def delete_user_key(key_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        if not auth_service.delete_key(key_id, role="user"):
            raise HTTPException(status_code=404, detail={"error": "这条用户密钥不存在，可能已经被删除"})
        return {"items": auth_service.list_keys(role="user")}

    @router.get("/api/accounts")
    async def get_accounts(authorization: str | None = Header(default=None)):
        require_admin(authorization)
        return {"items": account_service.list_accounts()}

    @router.post("/api/accounts")
    async def create_accounts(body: AccountCreateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        tokens = [str(token or "").strip() for token in body.tokens if str(token or "").strip()]
        if not tokens:
            raise HTTPException(status_code=400, detail={"error": "tokens is required"})
        result = account_service.add_accounts(tokens)
        refresh_result = account_service.refresh_accounts(tokens)
        return {
            **result,
            "refreshed": refresh_result.get("refreshed", 0),
            "errors": refresh_result.get("errors", []),
            "items": refresh_result.get("items", result.get("items", [])),
        }

    @router.delete("/api/accounts")
    async def delete_accounts(body: AccountDeleteRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        tokens = [str(token or "").strip() for token in body.tokens if str(token or "").strip()]
        if not tokens:
            raise HTTPException(status_code=400, detail={"error": "tokens is required"})
        return account_service.delete_accounts(tokens)

    @router.post("/api/accounts/refresh")
    async def refresh_accounts(body: AccountRefreshRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        access_tokens = [str(token or "").strip() for token in body.access_tokens if str(token or "").strip()]
        if not access_tokens:
            access_tokens = account_service.list_tokens()
        if not access_tokens:
            raise HTTPException(status_code=400, detail={"error": "access_tokens is required"})
        return account_service.refresh_accounts(access_tokens)

    @router.post("/api/accounts/update")
    async def update_account(body: AccountUpdateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        access_token = str(body.access_token or "").strip()
        if not access_token:
            raise HTTPException(status_code=400, detail={"error": "access_token is required"})
        updates = {key: value for key, value in {"type": body.type, "status": body.status, "quota": body.quota}.items() if value is not None}
        if not updates:
            raise HTTPException(status_code=400, detail={"error": "还没有检测到改动，请修改后再保存"})
        account = account_service.update_account(access_token, updates)
        if account is None:
            raise HTTPException(status_code=404, detail={"error": "account not found"})
        return {"item": account, "items": account_service.list_accounts()}

    @router.get("/api/cpa/pools")
    async def list_cpa_pools(authorization: str | None = Header(default=None)):
        require_admin(authorization)
        return {"pools": sanitize_cpa_pools(cpa_config.list_pools())}

    @router.post("/api/cpa/pools")
    async def create_cpa_pool(body: CPAPoolCreateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        if not body.base_url.strip():
            raise HTTPException(status_code=400, detail={"error": "base_url is required"})
        if not body.secret_key.strip():
            raise HTTPException(status_code=400, detail={"error": "secret_key is required"})
        pool = cpa_config.add_pool(name=body.name, base_url=body.base_url, secret_key=body.secret_key)
        return {"pool": sanitize_cpa_pool(pool), "pools": sanitize_cpa_pools(cpa_config.list_pools())}

    @router.post("/api/cpa/pools/{pool_id}")
    async def update_cpa_pool(pool_id: str, body: CPAPoolUpdateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        pool = cpa_config.update_pool(pool_id, body.model_dump(exclude_none=True))
        if pool is None:
            raise HTTPException(status_code=404, detail={"error": "pool not found"})
        return {"pool": sanitize_cpa_pool(pool), "pools": sanitize_cpa_pools(cpa_config.list_pools())}

    @router.delete("/api/cpa/pools/{pool_id}")
    async def delete_cpa_pool(pool_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        if not cpa_config.delete_pool(pool_id):
            raise HTTPException(status_code=404, detail={"error": "pool not found"})
        return {"pools": sanitize_cpa_pools(cpa_config.list_pools())}

    @router.get("/api/cpa/pools/{pool_id}/files")
    async def cpa_pool_files(pool_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        pool = cpa_config.get_pool(pool_id)
        if pool is None:
            raise HTTPException(status_code=404, detail={"error": "pool not found"})
        return {"pool_id": pool_id, "files": await run_in_threadpool(list_remote_files, pool)}

    @router.post("/api/cpa/pools/{pool_id}/import")
    async def cpa_pool_import(pool_id: str, body: CPAImportRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        pool = cpa_config.get_pool(pool_id)
        if pool is None:
            raise HTTPException(status_code=404, detail={"error": "pool not found"})
        try:
            job = cpa_import_service.start_import(pool, body.names)
        except ValueError as exc:
            raise HTTPException(status_code=400, detail={"error": str(exc)}) from exc
        return {"import_job": job}

    @router.get("/api/cpa/pools/{pool_id}/import")
    async def cpa_pool_import_progress(pool_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        pool = cpa_config.get_pool(pool_id)
        if pool is None:
            raise HTTPException(status_code=404, detail={"error": "pool not found"})
        return {"import_job": pool.get("import_job")}

    @router.get("/api/sub2api/servers")
    async def list_sub2api_servers(authorization: str | None = Header(default=None)):
        require_admin(authorization)
        return {"servers": sanitize_sub2api_servers(sub2api_config.list_servers())}

    @router.post("/api/sub2api/servers")
    async def create_sub2api_server(body: Sub2APIServerCreateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        if not body.base_url.strip():
            raise HTTPException(status_code=400, detail={"error": "base_url is required"})
        has_login = body.email.strip() and body.password.strip()
        has_api_key = bool(body.api_key.strip())
        if not has_login and not has_api_key:
            raise HTTPException(status_code=400, detail={"error": "email+password or api_key is required"})
        server = sub2api_config.add_server(
            name=body.name,
            base_url=body.base_url,
            email=body.email,
            password=body.password,
            api_key=body.api_key,
            group_id=body.group_id,
        )
        return {"server": sanitize_sub2api_server(server), "servers": sanitize_sub2api_servers(sub2api_config.list_servers())}

    @router.post("/api/sub2api/servers/{server_id}")
    async def update_sub2api_server(server_id: str, body: Sub2APIServerUpdateRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        server = sub2api_config.update_server(server_id, body.model_dump(exclude_none=True))
        if server is None:
            raise HTTPException(status_code=404, detail={"error": "server not found"})
        return {"server": sanitize_sub2api_server(server), "servers": sanitize_sub2api_servers(sub2api_config.list_servers())}

    @router.delete("/api/sub2api/servers/{server_id}")
    async def delete_sub2api_server(server_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        if not sub2api_config.delete_server(server_id):
            raise HTTPException(status_code=404, detail={"error": "server not found"})
        return {"servers": sanitize_sub2api_servers(sub2api_config.list_servers())}

    @router.get("/api/sub2api/servers/{server_id}/groups")
    async def sub2api_server_groups(server_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        server = sub2api_config.get_server(server_id)
        if server is None:
            raise HTTPException(status_code=404, detail={"error": "server not found"})
        try:
            groups = await run_in_threadpool(sub2api_list_remote_groups, server)
        except Exception as exc:
            raise HTTPException(status_code=502, detail={"error": str(exc)}) from exc
        return {"server_id": server_id, "groups": groups}

    @router.get("/api/sub2api/servers/{server_id}/accounts")
    async def sub2api_server_accounts(server_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        server = sub2api_config.get_server(server_id)
        if server is None:
            raise HTTPException(status_code=404, detail={"error": "server not found"})
        try:
            accounts = await run_in_threadpool(sub2api_list_remote_accounts, server)
        except Exception as exc:
            raise HTTPException(status_code=502, detail={"error": str(exc)}) from exc
        return {"server_id": server_id, "accounts": accounts}

    @router.post("/api/sub2api/servers/{server_id}/import")
    async def sub2api_server_import(server_id: str, body: Sub2APIImportRequest, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        server = sub2api_config.get_server(server_id)
        if server is None:
            raise HTTPException(status_code=404, detail={"error": "server not found"})
        try:
            job = sub2api_import_service.start_import(server, body.account_ids)
        except ValueError as exc:
            raise HTTPException(status_code=400, detail={"error": str(exc)}) from exc
        return {"import_job": job}

    @router.get("/api/sub2api/servers/{server_id}/import")
    async def sub2api_server_import_progress(server_id: str, authorization: str | None = Header(default=None)):
        require_admin(authorization)
        server = sub2api_config.get_server(server_id)
        if server is None:
            raise HTTPException(status_code=404, detail={"error": "server not found"})
        return {"import_job": server.get("import_job")}

    return router