from __future__ import annotations

import sys
from pathlib import Path
from typing import Optional

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


# ── Sub-config models ──────────────────────────────────────────────────────────


class RuntimeConfig(BaseModel):
    timezone: str = "America/Phoenix"
    headless: bool = True
    profile_name: str = "JobAgent"
    slow_mo_ms: int = 0
    default_timeout_ms: int = 15000
    navigation_timeout_ms: int = 30000
    max_pages_per_site: int = 3
    min_delay_ms: int = 1200
    max_delay_ms: int = 3500


class SearchDefaults(BaseModel):
    keywords: list[str] = Field(default_factory=lambda: ["orthodontist"])
    location: str = ""
    remote: bool = False
    date_mode: str = "today_or_last_24h"
    sort: str = "relevance"
    max_items_per_site: int = 30


class SummarizationConfig(BaseModel):
    ollama_base_url: str = "http://127.0.0.1:11434"
    model: str = "qwen3.5:9b"
    temperature: float = 0.1
    max_input_items: int = 200


class NotificationConfig(BaseModel):
    provider: str = "kakaotalk"
    fallback_markdown: bool = True


# ── Main global config ─────────────────────────────────────────────────────────


class GlobalConfig(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        env_nested_delimiter="__",
        extra="ignore",
    )

    runtime: RuntimeConfig = Field(default_factory=RuntimeConfig)
    search_defaults: SearchDefaults = Field(default_factory=SearchDefaults)
    summarization: SummarizationConfig = Field(default_factory=SummarizationConfig)
    notification: NotificationConfig = Field(default_factory=NotificationConfig)


# ── Loader functions ──────────────────────────────────────────────────────────


def load_global_config() -> GlobalConfig:
    """Load global config from sites/global.yaml, with env var overrides."""
    from gimme_job.utils.json_io import read_yaml
    from gimme_job.utils.paths import sites_dir

    yaml_path = sites_dir() / "global.yaml"
    if yaml_path.exists():
        data = read_yaml(yaml_path)
        return GlobalConfig.model_validate(data)
    return GlobalConfig()


def load_site_manifest(site_id: str):
    """Load a site manifest from sites/{site_id}.yaml."""
    from gimme_job.models.manifest import SiteManifest
    from gimme_job.utils.paths import sites_dir

    path = sites_dir() / f"{site_id}.yaml"
    if not path.exists():
        raise FileNotFoundError(f"Site manifest not found: {path}")
    return SiteManifest.from_yaml(path)


def list_enabled_sites() -> list[str]:
    """Return site_ids of all enabled (non-repair_needed) sites from sites/*.yaml."""
    from gimme_job.models.manifest import SiteManifest
    from gimme_job.utils.paths import sites_dir

    enabled = []
    for yaml_path in sorted(sites_dir().glob("*.yaml")):
        if yaml_path.stem == "global":
            continue
        try:
            manifest = SiteManifest.from_yaml(yaml_path)
            if manifest.enabled and not manifest.repair_needed:
                enabled.append(manifest.site_id)
        except Exception:
            pass
    return enabled


def list_all_sites() -> list[str]:
    """Return all site_ids from sites/*.yaml (including disabled/repair_needed)."""
    from gimme_job.models.manifest import SiteManifest
    from gimme_job.utils.paths import sites_dir

    sites = []
    for yaml_path in sorted(sites_dir().glob("*.yaml")):
        if yaml_path.stem == "global":
            continue
        try:
            manifest = SiteManifest.from_yaml(yaml_path)
            sites.append(manifest.site_id)
        except Exception:
            pass
    return sites


def merge_query(
    global_config: GlobalConfig,
    manifest,
    cli_overrides: Optional[dict] = None,
):
    """Merge search query with priority: CLI > site override > global defaults."""
    from gimme_job.models.dto import SearchQuery

    # Start from global defaults
    base = global_config.search_defaults
    merged = {
        "keywords": list(base.keywords),
        "location": base.location,
        "remote": base.remote,
        "date_mode": base.date_mode,
        "sort": base.sort,
        "max_items": base.max_items_per_site,
    }

    # Apply site-level overrides
    override = manifest.search_override
    if override.keywords is not None:
        merged["keywords"] = override.keywords
    if override.location is not None:
        merged["location"] = override.location
    if override.remote is not None:
        merged["remote"] = override.remote
    if override.date_mode is not None:
        merged["date_mode"] = override.date_mode
    if override.sort is not None:
        merged["sort"] = override.sort
    if override.max_items is not None:
        merged["max_items"] = override.max_items

    # Apply CLI overrides
    if cli_overrides:
        for k, v in cli_overrides.items():
            if v is not None and k in merged:
                merged[k] = v

    return SearchQuery(**merged)