import os
import sqlite3
import json
import time
import re
import inspect
import importlib.util
import sys
from pathlib import Path

DB_PATH = os.environ.get(
    "WEBUI_DB", "/data/adaptai/migrate/vast/workspace-vast1-2/webui/webui.db"
)
REPO_ROOT = Path(os.environ.get("OUI_MAX_ROOT", "/data/adaptai/projects/oui-max"))
TOOLS_DIR = REPO_ROOT / "tools"
FUNCS_DIR = REPO_ROOT / "functions"

front_re = re.compile(r'^"""\n(.*?)\n"""', re.S)


def parse_frontmatter(text: str) -> dict:
    m = front_re.search(text)
    fm = {}
    if not m:
        return fm
    for line in m.group(1).splitlines():
        if ":" in line:
            k, v = line.split(":", 1)
            fm[k.strip()] = v.strip()
    return fm


def make_specs_from_tools_class(module) -> list:
    specs = []
    if not hasattr(module, "Tools"):
        return specs
    cls = getattr(module, "Tools")
    for name, func in inspect.getmembers(cls, predicate=inspect.isfunction):
        if name.startswith("_"):
            continue
        sig = inspect.signature(func)
        props = {}
        req = []
        for pname, p in sig.parameters.items():
            if pname == "self":
                continue
            props[pname] = {"type": "string"}
            if p.default is inspect._empty:
                req.append(pname)
        specs.append(
            {
                "name": name,
                "description": func.__doc__.strip() if func.__doc__ else name,
                "parameters": {
                    "type": "object",
                    "properties": props,
                    **({"required": req} if req else {}),
                },
            }
        )
    return specs


def load_module_from_path(path: Path):
    spec = importlib.util.spec_from_file_location(path.stem, str(path))
    mod = importlib.util.module_from_spec(spec)
    assert spec and spec.loader
    spec.loader.exec_module(mod)
    return mod


def upsert_tool(cur, admin_id, tool_id, name, content, specs, meta):
    now = int(time.time())
    row = cur.execute("SELECT id FROM tool WHERE id=?", (tool_id,)).fetchone()
    if row:
        cur.execute(
            "UPDATE tool SET user_id=?, name=?, content=?, specs=?, meta=?, updated_at=? WHERE id=?",
            (
                admin_id,
                name,
                content,
                json.dumps(specs),
                json.dumps(meta),
                now,
                tool_id,
            ),
        )
    else:
        cur.execute(
            "INSERT INTO tool(id,user_id,name,content,specs,meta,created_at,updated_at,valves,access_control) VALUES(?,?,?,?,?,?,?,?,NULL,NULL)",
            (
                tool_id,
                admin_id,
                name,
                content,
                json.dumps(specs),
                json.dumps(meta),
                now,
                now,
            ),
        )


def main():
    if not Path(DB_PATH).exists():
        print("DB not found:", DB_PATH)
        sys.exit(1)
    con = sqlite3.connect(DB_PATH)
    cur = con.cursor()
    admin = cur.execute(
        "SELECT id FROM user ORDER BY created_at ASC LIMIT 1"
    ).fetchone()
    admin_id = admin[0] if admin else None
    # ensure tables exist
    try:
        cur.execute("SELECT 1 FROM tool LIMIT 1")
        cur.execute("SELECT 1 FROM function LIMIT 1")
    except Exception as e:
        print("DB schema missing:", e)
        con.close()
        sys.exit(1)

    # Clear existing tools/functions for clean slate
    cur.execute("DELETE FROM tool")
    cur.execute("DELETE FROM function")

    # Seed tools (skip private/underscore files)
    for path in sorted(TOOLS_DIR.glob("*.py")):
        if path.name.startswith("_"):
            # Skip internal modules not intended for Open WebUI Tools
            continue
        text = path.read_text()
        fm = parse_frontmatter(text)
        tool_id = fm.get("id") or path.stem
        name = fm.get("title") or path.stem
        meta = {
            "description": fm.get("description", ""),
            "manifest": {"version": fm.get("version", "")},
        }
        mod = load_module_from_path(path)
        specs = make_specs_from_tools_class(mod)
        if not specs:
            # Only register tools that expose a Tools class with callable methods
            print("skip: no Tools class for", tool_id)
            continue
        upsert_tool(cur, admin_id, tool_id, name, text, specs, meta)
        print("seeded tool:", tool_id)

    # Functions seeding placeholder (none by default)

    con.commit()
    con.close()
    print("seeding complete")


if __name__ == "__main__":
    main()