from typing import Literal, Optional

from ninja import Schema
from datetime import datetime
from uuid import UUID


class DiscountCodeSchema(Schema):
    id: int
    code: str
    type: str
    value: int
    max_discount: int | None = None
    is_active: bool
    starts_at: datetime | None = None
    ends_at: datetime | None = None
    usage_limit_total: int | None = None
    usage_limit_per_user: int | None = None
    min_amount: int | None = None
    applicable_event_ids: list[int]
    usage_count: int = 0
    created_at: datetime
    updated_at: datetime


class PagedDiscountCodeSchema(Schema):
    count: int
    results: list[DiscountCodeSchema]


class DiscountCodeWriteSchema(Schema):
    code: str
    type: str = "percent"
    value: int
    max_discount: int | None = None
    is_active: bool = True
    starts_at: datetime | None = None
    ends_at: datetime | None = None
    usage_limit_total: int | None = None
    usage_limit_per_user: int | None = None
    min_amount: int | None = None
    applicable_event_ids: list[int] = []


class CreatePaymentIn(Schema):
    event_id: int
    description: str
    discount_code: str | None = None
    mobile: str | None = None
    email:  str | None = None
    idempotency_key: UUID | None = None


class CreatePaymentOut(Schema):
    start_pay_url: str | None = None
    authority: str | None = None
    payment_id: int | None = None
    idempotency_key: UUID | None = None
    status: Literal["initiated", "pending", "paid", "failed", "canceled"]
    base_amount: int
    discount_amount: int
    amount: int

class PaymentDetailOut(Schema):
    payment_id: int
    event_id: int
    ref_id: str | None = None
    authority: str | None = None
    base_amount: int
    discount_amount: int
    amount: int
    status: str
    verified_at: str | None = None
    gateway_paid_at: str | None = None
    refund_status: Literal["none", "pending", "succeeded", "manual_review"] = "none"
    refund_attempts: int = 0
    refund_last_attempt_at: str | None = None
    refund_next_attempt_at: str | None = None
    refund_reference: str | None = None
    refund_last_error: str | None = None
    verification_state: Literal[
        "awaiting_verification",
        "checking",
        "retry_scheduled",
        "manual_review",
        "verified",
        "failed",
        "canceled",
    ]
    verification_attempts: int
    last_verification_at: str | None = None
    next_verification_at: str | None = None
    manual_review_at: str | None = None
    event: dict


class UserPaymentEventSchema(Schema):
    id: int
    title: str
    slug: str
    image_url: Optional[str] = None


class UserPaymentSchema(Schema):
    payment_id: int
    event: UserPaymentEventSchema
    base_amount: int
    discount_amount: int
    amount: int
    status: Literal["initiated", "pending", "paid", "failed", "canceled"]
    refund_status: Literal["none", "pending", "succeeded", "manual_review"] = "none"
    created_at: datetime
    paid_at: Optional[datetime] = None


class PaginatedUserPaymentsSchema(Schema):
    count: int
    page: int
    page_size: int
    total_pages: int
    results: list[UserPaymentSchema]

class CouponVerifyIn(Schema):
    event_id: int
    code: str

class CouponVerifyOut(Schema):
    discount_amount: int
    final_price: int