from __future__ import annotations

from typing import Any

from pydantic import BaseModel, Field
from pydantic_settings import BaseSettings, SettingsConfigDict

from paths import DATA_DIR, EXTENSION_DIR, ROOT_DIR, get_dates_file_path, get_env_files
from services.settings_store import load_overrides, save_overrides

CONFIGURABLE_FIELDS = [
    "gitlab_url",
    "gitlab_token",
    "gitlab_project_path",
    "gitlab_board_id",
    "gitlab_board_labels",
    "gitlab_milestone_title",
    "pts_url",
    "pts_project_name",
    "pts_default_task_name",
    "auto_fill_enabled",
    "auto_fill_hour",
    "auto_fill_minute",
    "max_hours_per_day",
    "hour_step",
    "xai_api_key",
    "xai_base_url",
    "grok_model",
    "use_llm",
    "use_description_variation",
    "pts_username",
    "pts_password",
    "teams_username",
    "teams_password",
    "teams_calendar_enabled",
    "teams_calendar_timezone",
    "teams_meeting_task_name",
    "teams_headless",
    "teams_meeting_exclude_keywords",
    # CompBase attendance punch (independent of PTS)
    "compbase_list_url",
    "compbase_fill_url",
    "compbase_username",
    "compbase_password",
    "compbase_default_days",
    "compbase_out_time_mode",
    # legacy Graph fields kept for backward-compatible settings files
    "azure_client_id",
    "azure_tenant_id",
]


class EnvSettings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=get_env_files() or None,
        env_file_encoding="utf-8",
        extra="ignore",
    )

    gitlab_url: str = "https://gitlab.supermicro.com"
    gitlab_token: str = ""
    gitlab_project_path: str = "super-cloud/scc-flex"
    gitlab_board_id: int = 1126
    gitlab_board_labels: str = "Category::BugFix,Type::Bug"
    gitlab_milestone_title: str = ""

    pts_url: str = "https://tw-timesheet.supermicro.com/PTS"
    pts_project_name: str = "SuperCloud Composer"
    pts_default_task_name: str = "Implement"
    pts_username: str = ""
    pts_password: str = ""

    auto_fill_enabled: bool = True
    auto_fill_hour: int = 18
    auto_fill_minute: int = 0

    backend_host: str = "0.0.0.0"
    backend_port: int = 8765

    max_hours_per_day: float = 8.0
    hour_step: float = 0.5

    xai_api_key: str = ""
    xai_base_url: str = "https://api.x.ai"
    grok_model: str = "grok-3-mini"
    use_llm: bool = True
    use_description_variation: bool = True

    teams_calendar_enabled: bool = False
    teams_username: str = ""
    teams_password: str = ""
    teams_calendar_timezone: str = "Asia/Taipei"
    teams_meeting_task_name: str = "Meeting"
    teams_headless: bool = False
    teams_meeting_exclude_keywords: str = "貼心的提醒,請記得下班刷退"
    azure_client_id: str = ""
    azure_tenant_id: str = "organizations"

    compbase_list_url: str = "http://tw-compbase.supermicro.com:6699"
    compbase_fill_url: str = "http://tw-compbase.supermicro.com:6671"
    compbase_username: str = ""
    compbase_password: str = ""
    compbase_default_days: int = 14
    compbase_out_time_mode: str = "expected"


class AppSettings(BaseModel):
    gitlab_url: str = "https://gitlab.supermicro.com"
    gitlab_token: str = ""
    gitlab_project_path: str = "super-cloud/scc-flex"
    gitlab_board_id: int = 1126
    gitlab_board_labels: str = "Category::BugFix,Type::Bug"
    gitlab_milestone_title: str = ""

    pts_url: str = "https://tw-timesheet.supermicro.com/PTS"
    pts_project_name: str = "SuperCloud Composer"
    pts_default_task_name: str = "Implement"
    pts_username: str = ""
    pts_password: str = ""

    auto_fill_enabled: bool = True
    auto_fill_hour: int = 18
    auto_fill_minute: int = 0

    backend_host: str = "0.0.0.0"
    backend_port: int = 8765

    max_hours_per_day: float = 8.0
    hour_step: float = 0.5

    xai_api_key: str = ""
    xai_base_url: str = "https://api.x.ai"
    grok_model: str = "grok-3-mini"
    use_llm: bool = True
    use_description_variation: bool = True

    teams_calendar_enabled: bool = False
    teams_username: str = ""
    teams_password: str = ""
    teams_calendar_timezone: str = "Asia/Taipei"
    teams_meeting_task_name: str = "Meeting"
    teams_headless: bool = False
    teams_meeting_exclude_keywords: str = "貼心的提醒,請記得下班刷退"
    azure_client_id: str = ""
    azure_tenant_id: str = "organizations"

    compbase_list_url: str = "http://tw-compbase.supermicro.com:6699"
    compbase_fill_url: str = "http://tw-compbase.supermicro.com:6671"
    compbase_username: str = ""
    compbase_password: str = ""
    compbase_default_days: int = 14
    compbase_out_time_mode: str = "expected"

    @property
    def teams_meeting_exclude_keyword_list(self) -> list[str]:
        return [part.strip() for part in self.teams_meeting_exclude_keywords.split(",") if part.strip()]

    @property
    def gitlab_board_label_list(self) -> list[str]:
        return [part.strip() for part in self.gitlab_board_labels.split(",") if part.strip()]


_env = EnvSettings()


def build_settings() -> AppSettings:
    data = _env.model_dump()
    overrides = load_overrides()
    for key in CONFIGURABLE_FIELDS:
        if key in overrides and overrides[key] is not None:
            data[key] = overrides[key]
    return AppSettings(**data)


def get_settings_dict() -> dict[str, Any]:
    return build_settings().model_dump()


def update_settings(updates: dict[str, Any]) -> AppSettings:
    current = load_overrides()
    merged = {**current}
    for key in CONFIGURABLE_FIELDS:
        if key not in updates:
            continue
        value = updates[key]
        if value is not None:
            merged[key] = value
    save_overrides(merged)
    return reload_settings()


def reload_settings() -> AppSettings:
    global _runtime
    _runtime = build_settings()
    return _runtime


_runtime = build_settings()


class SettingsProxy:
    def __getattr__(self, name: str) -> Any:
        return getattr(_runtime, name)

    def __repr__(self) -> str:
        return f"SettingsProxy({_runtime!r})"


settings = SettingsProxy()