"""每台手机独立的、可移植的设备档案。坐标全部是 0..1 的归一化值。"""
from __future__ import annotations

import json
import re
import hashlib
from datetime import datetime, timezone
from pathlib import Path

from .paths import PROFILES, ensure_workdirs


class ProfileError(RuntimeError):
    pass


# 核验/确认常处于 WebView，XML 录制会被标记为 other；这三页足以确认设备、列表和结果路径。
REQUIRED_SAMPLE_PAGES = {"list", "invoice_info", "success"}


def safe_id(serial: str) -> str:
    return re.sub(r"[^A-Za-z0-9_.-]+", "_", serial)


def path_for(serial: str) -> Path:
    return PROFILES / f"{safe_id(serial)}_{hashlib.sha256(serial.encode()).hexdigest()[:10]}.json"


def load(serial: str) -> dict | None:
    path = path_for(serial)
    if not path.exists():
        return None
    return json.loads(path.read_text(encoding="utf-8"))


def save(profile: dict) -> Path:
    serial = str(profile.get("device", {}).get("serial", ""))
    if not serial:
        raise ProfileError("设备档案缺少 device.serial")
    ensure_workdirs()
    profile["updated_at"] = datetime.now(timezone.utc).isoformat()
    destination = path_for(serial)
    destination.write_text(json.dumps(profile, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
    return destination


def normalized_point(point: tuple[float, float], screen: tuple[int, int]) -> tuple[int, int]:
    x, y = point
    if not 0 <= x <= 1 or not 0 <= y <= 1:
        raise ProfileError("坐标必须是 0 到 1 的归一化值")
    width, height = screen
    return round(x * (width - 1)), round(y * (height - 1))


def compatibility(profile: dict | None, current: dict[str, str]) -> dict:
    if not profile:
        return {"status": "missing", "reasons": ["该手机尚未采样"]}
    saved = profile.get("device", {})
    reasons: list[str] = []
    if saved.get("serial") != current.get("serial"):
        reasons.append("设备序列号不一致")
    for key, label in (("orientation", "屏幕方向"), ("screen", "屏幕尺寸"), ("density", "屏幕密度")):
        if saved.get(key) and saved.get(key) != current.get(key):
            reasons.append(f"{label}已变化")
    return {"status": "ready" if not reasons and profile.get("status") == "verified" else "draft", "reasons": reasons}