"""Seed the database with roles, permissions, and dev users."""

import asyncio
import json
import os
from pathlib import Path

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from auth import get_password_hash
from database import Base, async_session, engine
from models import (
    ROLE_ADMIN,
    ROLE_DEFINITIONS,
    ROLE_REGULAR,
    Permission,
    Role,
    User,
)
from repositories.pricing import PricingRepository

DEV_USER_EMAIL = os.environ["DEV_USER_EMAIL"]
DEV_USER_PASSWORD = os.environ["DEV_USER_PASSWORD"]
DEV_ADMIN_EMAIL = os.environ["DEV_ADMIN_EMAIL"]
DEV_ADMIN_PASSWORD = os.environ["DEV_ADMIN_PASSWORD"]


async def upsert_role(
    db: AsyncSession, name: str, description: str, permissions: list[Permission]
) -> Role:
    """Create or update a role with the given permissions."""
    result = await db.execute(select(Role).where(Role.name == name))
    role = result.scalar_one_or_none()

    if role:
        role.description = description
        print(f"Updated role: {name}")
    else:
        role = Role(name=name, description=description)
        db.add(role)
        await db.flush()  # Get the role ID
        print(f"Created role: {name}")

    # Set permissions for the role
    await role.set_permissions(db, permissions)
    print(f"  Permissions: {', '.join(p.value for p in permissions)}")

    return role


async def upsert_user(
    db: AsyncSession, email: str, password: str, role_names: list[str]
) -> User:
    """Create or update a user with the given credentials and roles."""
    result = await db.execute(select(User).where(User.email == email))
    user = result.scalar_one_or_none()

    # Get roles
    roles = []
    for role_name in role_names:
        result = await db.execute(select(Role).where(Role.name == role_name))
        role = result.scalar_one_or_none()
        if not role:
            raise ValueError(f"Role '{role_name}' not found")
        roles.append(role)

    if user:
        user.hashed_password = get_password_hash(password)
        user.roles = roles  # type: ignore[assignment]
        print(f"Updated user: {email} with roles: {role_names}")
    else:
        user = User(
            email=email,
            hashed_password=get_password_hash(password),
            roles=roles,
        )
        db.add(user)
        print(f"Created user: {email} with roles: {role_names}")

    return user


async def seed_pricing_config(db: AsyncSession) -> None:
    """Seed initial pricing configuration from shared/constants.json."""
    # Load constants from shared/constants.json
    constants_path = Path(__file__).parent.parent / "shared" / "constants.json"
    with constants_path.open() as f:
        constants = json.load(f)

    exchange_config = constants.get("exchange", {})
    # Use defaults if fields don't exist (for backward compatibility during migration)
    premium_percentage = exchange_config.get("premiumPercentage", 5)
    eur_trade_min = exchange_config.get("eurTradeMin", 100)
    eur_trade_max = exchange_config.get("eurTradeMax", 3000)

    # Convert EUR amounts to cents
    eur_min_cents = eur_trade_min * 100
    eur_max_cents = eur_trade_max * 100

    repo = PricingRepository(db)
    config = await repo.create_or_update(
        premium_buy=premium_percentage,
        premium_sell=premium_percentage,
        small_trade_threshold_eur=0,  # Default: no small trade extra (admin will set)
        small_trade_extra_premium=0,  # Default: no extra premium
        eur_min_buy=eur_min_cents,
        eur_max_buy=eur_max_cents,
        eur_min_sell=eur_min_cents,
        eur_max_sell=eur_max_cents,
    )

    if config.id:  # If config already existed (was updated)
        print("Updated pricing config")
    else:
        print("Created pricing config")
    print(f"  Premium BUY: {config.premium_buy}%, Premium SELL: {config.premium_sell}%")
    print(
        f"  Trade limits BUY: €{config.eur_min_buy / 100:.0f} - "
        f"€{config.eur_max_buy / 100:.0f}"
    )
    print(
        f"  Trade limits SELL: €{config.eur_min_sell / 100:.0f} - "
        f"€{config.eur_max_sell / 100:.0f}"
    )


async def seed() -> None:
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)

    async with async_session() as db:
        print("\n=== Seeding Roles ===")
        for role_name, role_config in ROLE_DEFINITIONS.items():
            await upsert_role(
                db,
                role_name,
                role_config["description"],
                role_config["permissions"],
            )

        print("\n=== Seeding Users ===")
        # Create regular dev user
        await upsert_user(db, DEV_USER_EMAIL, DEV_USER_PASSWORD, [ROLE_REGULAR])

        # Create admin dev user
        await upsert_user(db, DEV_ADMIN_EMAIL, DEV_ADMIN_PASSWORD, [ROLE_ADMIN])

        print("\n=== Seeding Pricing Config ===")
        await seed_pricing_config(db)

        await db.commit()
        print("\n=== Seeding Complete ===\n")


if __name__ == "__main__":
    asyncio.run(seed())