import { postgrestLocalUrl, patreonVideoAccessBenefitId, giteaUrl } from './constants'
import { type IPatron } from '@futureporn/types'
import { PublicPatron } from '@futureporn/utils/patron.ts';
import { keycloakLocalUrl, patreonApiIdentityUrl } from "./constants";
import { Session } from 'next-auth';
import { JWT } from 'next-auth/jwt';
import { type UMAToken, getKeycloakIdFromTierId, getUMAToken, syncronizeKeycloakRoles } from './keycloak';



export type TiersList = string[]
interface KeycloakToken {
  account: {
    access_token: string
  }
}
interface KeycloakIdpToken {
  access_token: string;
  expires_in: number;
  refresh_expires_in: number;
  refresh_token: string;
  token_type: string;
  "not-before-policy": number;
  scope: string;
  version: string;
}
interface PatreonResponse {
  data: UserData;
  included: IncludedItem[];
  links: {
    self: string;
  };
}

interface UserData {
  attributes: UserAttributes;
  id: string;
  relationships: {
    memberships: {
      data: Relationship[];
    };
  };
  type: "user";
}

interface UserAttributes {
  about: string | null;
  created: string; // ISO 8601 date string
  first_name: string;
  full_name: string;
  image_url: string;
  last_name: string;
  thumb_url: string;
  url: string;
  vanity: string | null;
}

interface Relationship {
  id: string;
  type: string;
}

type IncludedItem = Member | Tier | Benefit;

interface Member {
  attributes: Record<string, unknown>;
  id: string;
  relationships: {
    currently_entitled_tiers: {
      data: Relationship[];
    };
  };
  type: "member";
}

export interface Tier {
  attributes: Record<string, unknown>;
  id: string;
  relationships: {
    benefits: {
      data: Relationship[];
    };
  };
  type: "tier";
}

interface Benefit {
  attributes: Record<string, unknown>;
  id: string;
  type: "benefit";
}

export interface ICampaign {
  pledgeSum: number;
  patronCount: number;
}


export interface IMarshalledCampaign {
  data: {
    attributes: {
      pledge_sum: number,
      patron_count: number
    }
  }
}


export const tiers = {
  everyone: '-1',
  free: '10620388',
  archiveSupporter: '8154170',
  stealthSupporter: '9561793',
  tuneItUp: '9184994',
  maxQ: '22529959',
  archiveCollector: '8154171',
  advancedArchiveSupporter: '8686045',
  quantumSupporter: '8694826',
  sneakyQuantumSupporter: '9560538',
  luberPlusPlus: '8686022'
}


export async function updateKeycloakUserPatreonEntitlements(token: JWT) {

  console.log(`updateKeycloakUserPatreonEntitlements() invoked.`)

  const userId = token?.sub
  if (!userId) {
    throw new Error(`failed to get userId from token.sub`);
  }

  const keycloakidpToken = await getKeycloakIdpToken(token.access_token)

  if (!keycloakidpToken) {
    throw new Error(`failed to get keycloakIdpToken; it was falsy.`)
  }

  const patreonTiersList = await getPatreonMemberships(keycloakidpToken)


  await syncronizeKeycloakRoles(userId, patreonTiersList)


}

export async function getKeycloakIdpToken(access_token: string): Promise<KeycloakIdpToken> {
  console.log(`getKeycloakIdpToken() using access_token=${access_token}`)

  // @todo check the access_token. if it is expired, use the refresh_token to get a new access_token.

  const res = await fetch(`https://keycloak.fp.sbtp.xyz/realms/futureporn/broker/patreon/token`, {
    headers: {
      'Authorization': `Bearer ${access_token}`
    }
  })

  if (!res.ok) {
    const bod = await res.text()
    const msg = `req.status=${res.status} req.statusText=${res.statusText} body=${bod}`
    console.log(msg)
    throw new Error(`Failed to getKeycloakIdpToken. ${msg}`)
  }

  const idpToken = await res.json()
  return idpToken
}

export function extractCurrentlyEntitledTiers(response: PatreonResponse): Relationship[] {
  return response.included
    .filter((item): item is Member => item.type === "member")
    .flatMap(member => member.relationships.currently_entitled_tiers.data);
}

export async function getPatreonMemberships(token: KeycloakIdpToken): Promise<TiersList> {
  // console.log(`getPatreonMemberships with keycloakidpToken as follows`)
  // console.log(token)
  const query = 'fields%5Buser%5D=about,created,email,first_name,full_name,image_url,last_name,thumb_url,url,vanity&include=memberships,memberships.currently_entitled_tiers,memberships.currently_entitled_tiers.benefits';
  const res = await fetch(`${patreonApiIdentityUrl}?${query}`, {
    headers: {
      'Authorization': `Bearer ${token.access_token}`
    }
  })
  const data = await res.json() as PatreonResponse

  // from the currently_entitled_tiers, we only want the id.
  // we filter out any non-futureporn patreon tiers.
  return extractCurrentlyEntitledTiers(data)
    .map((rel) => rel.id)
    .filter((t) => Object.values(tiers).includes(t))
}



export function isEntitledToPatronVideoAccess(session: Session): boolean {
  if (!session.user?.patreonBenefits) return false;
  const patreonBenefits = session.user.patreonBenefits
  return (patreonBenefits.includes(patreonVideoAccessBenefitId))
}


export async function getPatrons(): Promise<PublicPatron[]> {
  let patrons: PublicPatron[] = []
  try {
    const url = `${postgrestLocalUrl}/patrons`
    console.log(`GET requesting ${url}`)
    const res = await fetch(url);
    const data = await res.json();
    if (!res.ok) throw new Error(`failed to get /patrons. res.status=${res.status}, res.statusText=${res.statusText}`);
    if (!data) throw new Error(`no patron data was available. ${JSON.stringify(data)}`);
    patrons = data
  } catch (e) {
    console.error('failed to get patrons~ list')
    console.error(e)
    return [] as PublicPatron[]
  }
  return patrons
}


export async function getCampaign(): Promise<ICampaign> {
  const res = await fetch('https://www.patreon.com/api/campaigns/8012692', {
    headers: {
      accept: 'application/json'
    },
    next: {
      revalidate: 43200 // 12 hour cache
    }
  })
  const campaignData = await res.json();
  const data = {
    patronCount: campaignData.data.attributes.patron_count,
    pledgeSum: campaignData.data.attributes.campaign_pledge_sum
  }
  return data
}