"""FastAPI routes — dashboard API + auth."""
from __future__ import annotations

import secrets
from typing import Annotated, Any

from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import HTTPBasic, HTTPBasicCredentials
from pydantic import BaseModel

from admin.models import (
    activate_flow_config,
    delete_flow_config,
    get_flow_config,
    get_stats,
    list_flow_configs,
    upsert_flow_config,
)
from config import config

router = APIRouter()
security = HTTPBasic()


def require_auth(credentials: Annotated[HTTPBasicCredentials, Depends(security)]) -> str:
    ok_user = secrets.compare_digest(credentials.username.encode(), config.admin_username.encode())
    ok_pass = secrets.compare_digest(credentials.password.encode(), config.admin_password.encode())
    if not (ok_user and ok_pass):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Invalid credentials",
            headers={"WWW-Authenticate": "Basic"},
        )
    return credentials.username


Auth = Annotated[str, Depends(require_auth)]


# ---------------------------------------------------------------------------
# Stats
# ---------------------------------------------------------------------------

@router.get("/api/stats")
async def stats(_: Auth) -> dict[str, object]:
    return await get_stats()


# ---------------------------------------------------------------------------
# Flow configs
# ---------------------------------------------------------------------------

class FlowConfigIn(BaseModel):
    name: str
    is_active: bool = False
    search_texts: list[str] = []
    search_box_selector: str = ""
    search_box_selector_type: str = "css"
    search_submit_selector: str = ""
    search_submit_selector_type: str = "css"
    search_results_selector: str = ""
    scroll_container_selector: str = ""
    max_scrolls: int = 30
    scroll_pause_ms: int = 1200
    no_new_content_timeout_ms: int = 3000
    item_selector_template: str = ""
    item_selector_type: str = "css"
    target_item_ids: list[str] = []


def _to_db_dict(body: FlowConfigIn) -> dict[str, Any]:
    return {
        "name": body.name,
        "is_active": int(body.is_active),
        "search_texts_json": body.search_texts,
        "search_box_selector": body.search_box_selector,
        "search_box_selector_type": body.search_box_selector_type,
        "search_submit_selector": body.search_submit_selector,
        "search_submit_selector_type": body.search_submit_selector_type,
        "search_results_selector": body.search_results_selector,
        "scroll_container_selector": body.scroll_container_selector,
        "max_scrolls": body.max_scrolls,
        "scroll_pause_ms": body.scroll_pause_ms,
        "no_new_content_timeout_ms": body.no_new_content_timeout_ms,
        "item_selector_template": body.item_selector_template,
        "item_selector_type": body.item_selector_type,
        "target_item_ids_json": body.target_item_ids,
    }


@router.get("/api/flow-configs")
async def list_configs(_: Auth) -> list[dict[str, object]]:
    return await list_flow_configs()  # type: ignore[return-value]


@router.get("/api/flow-configs/{cfg_id}")
async def get_config(cfg_id: int, _: Auth) -> dict[str, object]:
    row = await get_flow_config(cfg_id)
    if not row:
        raise HTTPException(status_code=404, detail="Not found")
    return row  # type: ignore[return-value]


@router.post("/api/flow-configs", status_code=201)
async def create_config(body: FlowConfigIn, _: Auth) -> dict[str, object]:
    new_id = await upsert_flow_config(_to_db_dict(body))
    row = await get_flow_config(new_id)
    return row or {}  # type: ignore[return-value]


@router.put("/api/flow-configs/{cfg_id}")
async def update_config(cfg_id: int, body: FlowConfigIn, _: Auth) -> dict[str, object]:
    existing = await get_flow_config(cfg_id)
    if not existing:
        raise HTTPException(status_code=404, detail="Not found")
    await upsert_flow_config(_to_db_dict(body), cfg_id=cfg_id)
    row = await get_flow_config(cfg_id)
    return row or {}  # type: ignore[return-value]


@router.post("/api/flow-configs/{cfg_id}/activate", status_code=200)
async def activate_config(cfg_id: int, _: Auth) -> dict[str, object]:
    existing = await get_flow_config(cfg_id)
    if not existing:
        raise HTTPException(status_code=404, detail="Not found")
    await activate_flow_config(cfg_id)
    return {"activated": cfg_id}


@router.delete("/api/flow-configs/{cfg_id}", status_code=204)
async def delete_config(cfg_id: int, _: Auth) -> None:
    existing = await get_flow_config(cfg_id)
    if not existing:
        raise HTTPException(status_code=404, detail="Not found")
    await delete_flow_config(cfg_id)