"""
Skills configuration for Hermes Agent.
`hermes skills` enters this module.

Toggle individual skills or categories on/off, globally or per-platform.
Config stored in ~/.hermes/config.yaml under:

  skills:
    disabled: [skill-a, skill-b]          # global disabled list
    platform_disabled:                    # per-platform overrides
      telegram: [skill-c]
      cli: []
"""
from typing import List, Optional, Set

from hermes_cli.config import cfg_get, load_config, save_config
from hermes_cli.colors import Colors, color
from hermes_cli.platforms import PLATFORMS as _PLATFORMS

# Backward-compatible view: {key: label_string} so existing code that
# iterates ``PLATFORMS.items()`` or calls ``PLATFORMS.get(key)`` keeps
# working without changes to every call site.
PLATFORMS = {k: info.label for k, info in _PLATFORMS.items() if k != "api_server"}

# ─── Config Helpers ───────────────────────────────────────────────────────────

def get_disabled_skills(config: dict, platform: Optional[str] = None) -> Set[str]:
    """Return disabled skill names. Platform-specific list falls back to global."""
    skills_cfg = config.get("skills", {})
    global_disabled = set(skills_cfg.get("disabled", []))
    if platform is None:
        return global_disabled
    platform_disabled = cfg_get(skills_cfg, "platform_disabled", platform)
    if platform_disabled is None:
        return global_disabled
    return set(platform_disabled)


def save_disabled_skills(config: dict, disabled: Set[str], platform: Optional[str] = None):
    """Persist disabled skill names to config."""
    config.setdefault("skills", {})
    if platform is None:
        config["skills"]["disabled"] = sorted(disabled)
    else:
        config["skills"].setdefault("platform_disabled", {})
        config["skills"]["platform_disabled"][platform] = sorted(disabled)
    save_config(config)


# ─── Skill Discovery ─────────────────────────────────────────────────────────

def _list_all_skills() -> List[dict]:
    """Return all installed skills (ignoring disabled state)."""
    try:
        from tools.skills_tool import _find_all_skills
        return _find_all_skills(skip_disabled=True)
    except Exception:
        return []


def _get_categories(skills: List[dict]) -> List[str]:
    """Return sorted unique category names (None -> 'uncategorized')."""
    return sorted({s["category"] or "uncategorized" for s in skills})


# ─── Platform Selection ──────────────────────────────────────────────────────

def _select_platform() -> Optional[str]:
    """Ask user which platform to configure, or global."""
    options = [("global", "All platforms (global default)")] + list(PLATFORMS.items())
    print()
    print(color("  Configure skills for:", Colors.BOLD))
    for i, (key, label) in enumerate(options, 1):
        print(f"  {i}. {label}")
    print()
    try:
        raw = input(color("  Select [1]: ", Colors.YELLOW)).strip()
    except (KeyboardInterrupt, EOFError):
        return None
    if not raw:
        return None  # global
    try:
        idx = int(raw) - 1
        if 0 <= idx < len(options):
            key = options[idx][0]
            return None if key == "global" else key
    except ValueError:
        pass
    return None


# ─── Category Toggle ─────────────────────────────────────────────────────────

def _toggle_by_category(skills: List[dict], disabled: Set[str]) -> Set[str]:
    """Toggle all skills in a category at once."""
    from hermes_cli.curses_ui import curses_checklist

    categories = _get_categories(skills)
    cat_labels = []
    # A category is "enabled" (checked) when NOT all its skills are disabled
    pre_selected = set()
    for i, cat in enumerate(categories):
        cat_skills = [s["name"] for s in skills if (s["category"] or "uncategorized") == cat]
        cat_labels.append(f"{cat} ({len(cat_skills)} skills)")
        if not all(s in disabled for s in cat_skills):
            pre_selected.add(i)

    chosen = curses_checklist(
        "Categories — toggle entire categories",
        cat_labels, pre_selected, cancel_returns=pre_selected,
    )

    new_disabled = set(disabled)
    for i, cat in enumerate(categories):
        cat_skills = {s["name"] for s in skills if (s["category"] or "uncategorized") == cat}
        if i in chosen:
            new_disabled -= cat_skills  # category enabled → remove from disabled
        else:
            new_disabled |= cat_skills  # category disabled → add to disabled
    return new_disabled


# ─── Entry Point ──────────────────────────────────────────────────────────────

def skills_command(args=None):
    """Entry point for `hermes skills`."""
    from hermes_cli.curses_ui import curses_checklist

    config = load_config()
    skills = _list_all_skills()

    if not skills:
        print(color("  No skills installed.", Colors.DIM))
        return

    # Step 1: Select platform
    platform = _select_platform()
    platform_label = PLATFORMS.get(platform, "All platforms") if platform else "All platforms"

    # Step 2: Select mode — individual or by category
    print()
    print(color(f"  Configure for: {platform_label}", Colors.DIM))
    print()
    print("  1. Toggle individual skills")
    print("  2. Toggle by category")
    print()
    try:
        mode = input(color("  Select [1]: ", Colors.YELLOW)).strip() or "1"
    except (KeyboardInterrupt, EOFError):
        return

    disabled = get_disabled_skills(config, platform)

    if mode == "2":
        new_disabled = _toggle_by_category(skills, disabled)
    else:
        # Build labels and map indices → skill names
        labels = [
            f"{s['name']}  ({s['category'] or 'uncategorized'})  —  {s['description'][:55]}"
            for s in skills
        ]
        # "selected" = enabled (not disabled) — matches the [✓] convention
        pre_selected = {i for i, s in enumerate(skills) if s["name"] not in disabled}
        chosen = curses_checklist(
            f"Skills for {platform_label}",
            labels, pre_selected, cancel_returns=pre_selected,
        )
        # Anything NOT chosen is disabled
        new_disabled = {skills[i]["name"] for i in range(len(skills)) if i not in chosen}

    if new_disabled == disabled:
        print(color("  No changes.", Colors.DIM))
        return

    save_disabled_skills(config, new_disabled, platform)
    enabled_count = len(skills) - len(new_disabled)
    print(color(f"✓ Saved: {enabled_count} enabled, {len(new_disabled)} disabled ({platform_label}).", Colors.GREEN))
