from typing import Annotated

from fastapi import APIRouter, File, Form, HTTPException, Request
from sqlalchemy import select
from sqlalchemy.exc import IntegrityError
from starlette import status
from starlette.responses import RedirectResponse

from allmende_payment_system import types
from allmende_payment_system.api.dependencies import SessionDep, UserDep
from allmende_payment_system.models import (
    Account,
    Area,
    Permission,
    Product,
    Transaction,
    User,
    UserGroup,
)
from allmende_payment_system.tools import get_jinja_renderer

admin_router = APIRouter(prefix="/admin")

# USERS


@admin_router.get("/users")
async def user_list(request: Request, session: SessionDep, user: UserDep):
    if not user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    users = session.scalars(select(User)).all()
    groups = session.scalars(select(UserGroup)).all()
    templates = get_jinja_renderer()
    return templates.TemplateResponse(
        "users.html.jinja",
        context={"request": request, "users": users, "all_groups": groups},
    )


@admin_router.post("/users/{user_id}/add_group")
async def user_add_group(
    request: Request,
    session: SessionDep,
    loggend_in_user: UserDep,
    user_id: int,
    group_id: Annotated[int, Form()],
):
    if not loggend_in_user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    group = session.execute(
        select(UserGroup).where(UserGroup.id == group_id)
    ).scalar_one()
    user = session.execute(select(User).where(User.id == user_id)).scalar_one()
    user.user_groups.append(group)

    return RedirectResponse(url="/admin/users", status_code=status.HTTP_303_SEE_OTHER)


@admin_router.get("/users/{user_id}/remove_group/{group_id}")
async def user_remove_group(
    request: Request,
    session: SessionDep,
    loggend_in_user: UserDep,
    user_id: int,
    group_id: int,
):
    if not loggend_in_user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    group = session.execute(
        select(UserGroup).where(UserGroup.id == group_id)
    ).scalar_one()
    user = session.execute(select(User).where(User.id == user_id)).scalar_one()
    print(user)
    user.user_groups.remove(group)
    return RedirectResponse(url="/admin/users", status_code=status.HTTP_303_SEE_OTHER)


# GROUPS


@admin_router.get("/groups")
async def group_list(request: Request, session: SessionDep, user: UserDep):
    if not user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    groups = session.scalars(select(UserGroup)).all()
    templates = get_jinja_renderer()
    return templates.TemplateResponse(
        "groups.html.jinja",
        context={"request": request, "groups": groups},
    )


@admin_router.post("/groups/{group_id}/add_permission")
async def group_add_permission(
    request: Request,
    session: SessionDep,
    user: UserDep,
    group_id: int,
    permission: Annotated[str, Form()],
):
    if not user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    scope_action = permission.split(":")
    if len(scope_action) != 2:
        raise HTTPException(
            status_code=400, detail="Permission must be in the format 'scope:action'"
        )

    permission = Permission(scope=scope_action[0], action=scope_action[1])
    group = session.execute(
        select(UserGroup).where(UserGroup.id == group_id)
    ).scalar_one()

    session.add(permission)
    group.permissions.append(permission)

    return RedirectResponse(url="/admin/groups", status_code=status.HTTP_303_SEE_OTHER)


@admin_router.get("/groups/{group_id}/remove_permission/{permission_id}")
async def group_remove_permission(
    request: Request,
    session: SessionDep,
    user: UserDep,
    group_id: int,
    permission_id: int,
):
    if not user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    permission = session.execute(
        select(Permission).where(Permission.id == permission_id)
    ).scalar_one()
    group = session.execute(
        select(UserGroup).where(UserGroup.id == group_id)
    ).scalar_one()
    group.permissions.remove(permission)
    session.delete(permission)
    return RedirectResponse(url="/admin/groups", status_code=status.HTTP_303_SEE_OTHER)


@admin_router.post("/groups/create")
async def create_group(
    request: Request,
    session: SessionDep,
    user: UserDep,
    group_data: Annotated[types.UserGroup, Form()],
):
    if not user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    group = UserGroup(name=group_data.name, description=group_data.description)
    session.add(group)

    return RedirectResponse(url="/admin/groups", status_code=status.HTTP_303_SEE_OTHER)


@admin_router.get("/groups/{group_id}/delete")
async def delete_group(
    request: Request,
    session: SessionDep,
    user: UserDep,
    group_id: int,
):
    if not user.has_permission("user", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    group = session.execute(
        select(UserGroup).where(UserGroup.id == group_id)
    ).scalar_one()
    session.delete(group)
    return RedirectResponse(url="/admin/groups", status_code=status.HTTP_303_SEE_OTHER)


# PRODUCTS


@admin_router.get("/products")
async def get_products(
    request: Request,
    session: SessionDep,
    user: UserDep,
):
    products = session.scalars(
        select(Product).order_by(Product.area_id, Product.name)
    ).all()

    templates = get_jinja_renderer()

    return templates.TemplateResponse(
        "products.html.jinja",
        context={"request": request, "products": products},
    )


@admin_router.get("/products/edit/{product_id}")
async def edit_product_get(
    request: Request, session: SessionDep, user: UserDep, product_id: int
):
    product = session.execute(select(Product).where(Product.id == product_id)).scalar()

    areas = session.scalars(select(Area)).all()

    templates = get_jinja_renderer()

    return templates.TemplateResponse(
        "product_edit.html.jinja",
        context={
            "request": request,
            "product": product,
            "edit_mode": True,
            "areas": areas,
        },
    )


@admin_router.post("/products/edit/{product_id}")
async def edit_product_post(
    request: Request,
    session: SessionDep,
    user: UserDep,
    product_id: int,
    product_data: Annotated[types.Product, Form()],
):
    if not user.has_permission("product", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    product = session.execute(
        select(Product).where(Product.id == product_id)
    ).scalar_one()

    for field_name, data in product_data.model_dump().items():
        setattr(product, field_name, data)

    session.flush()

    return RedirectResponse(
        url="/admin/products", status_code=status.HTTP_303_SEE_OTHER
    )


@admin_router.get("/products/new")
async def new_product_get(
    request: Request,
    session: SessionDep,
    user: UserDep,
):
    if not user.has_permission("product", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    areas = session.scalars(select(Area)).all()

    templates = get_jinja_renderer()

    return templates.TemplateResponse(
        "product_edit.html.jinja",
        context={"request": request, "edit_mode": False, "areas": areas},
    )


@admin_router.post("/products/new")
async def new_product_post(
    request: Request,
    session: SessionDep,
    user: UserDep,
    product_data: Annotated[types.Product, Form()],
    # product_image: Annotated[bytes, File()]
):
    if not user.has_permission("product", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")
    # print(len(product_image))
    product = Product()

    for field_name, data in product_data.model_dump().items():
        setattr(product, field_name, data)

    session.add(product)

    return RedirectResponse(
        url="/admin/products", status_code=status.HTTP_303_SEE_OTHER
    )


@admin_router.get("/accounts")
async def get_accounts(
    request: Request,
    session: SessionDep,
    user: UserDep,
):
    if not user.has_permission("account", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    templates = get_jinja_renderer()

    accounts = session.scalars(select(Account)).all()
    users = session.scalars(select(User)).all()

    return templates.TemplateResponse(
        "accounts.html.jinja",
        context={"request": request, "accounts": accounts, "users": users},
    )


@admin_router.post("/accounts/new")
async def create_account(
    request: Request,
    session: SessionDep,
    user: UserDep,
    account_name: Annotated[str, Form()],
):
    if not user.has_permission("account", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    account = Account(name=account_name)
    session.add(account)
    try:
        session.flush()
    except IntegrityError as e:
        session.rollback()
        raise HTTPException(
            status_code=400, detail="Account with this name already exists"
        ) from e
    return RedirectResponse(
        url="/admin/accounts", status_code=status.HTTP_303_SEE_OTHER
    )


@admin_router.post("/accounts/{account_id}/add_user")
async def add_user_to_account(
    request: Request,
    session: SessionDep,
    user: UserDep,
    account_id: int,
    user_id: Annotated[int, Form()],
):
    if not user.has_permission("account", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    account = session.execute(
        select(Account).where(Account.id == account_id)
    ).scalar_one()
    user_to_add = session.execute(select(User).where(User.id == user_id)).scalar_one()

    account.users.append(user_to_add)

    return RedirectResponse(
        url="/admin/accounts", status_code=status.HTTP_303_SEE_OTHER
    )


@admin_router.post("/accounts/{account_id}/add_balance")
async def add_balance_to_account(
    request: Request,
    session: SessionDep,
    user: UserDep,
    account_id: int,
    amount: Annotated[float, Form()],
):
    if not user.has_permission("account", "edit"):
        raise HTTPException(status_code=403, detail="Insufficient permissions")

    account = session.execute(
        select(Account).where(Account.id == account_id)
    ).scalar_one()

    account.transactions.append(Transaction(type="deposit", total_amount=amount))

    return RedirectResponse(
        url="/admin/accounts", status_code=status.HTTP_303_SEE_OTHER
    )