import { supabaseAdmin } from "../config/supabase";
import type { ProfileAnswer } from "../types/domain";
import { HttpError } from "../utils/httpError";
import { getQuestionsDocument, isKnownQuestionId } from "../utils/questions";
import { createEmbedding } from "./embeddingService";
import { summarizeProfile } from "./openClawService";

interface UpsertProfileInput {
  displayName: string;
  age: number;
  location?: string;
  gender?: string;
  interestedIn?: string[];
}

function answerText(answer: ProfileAnswer): string {
  const raw = Array.isArray(answer.answer) ? answer.answer.join(", ") : answer.answer;
  return [raw, answer.followup].filter(Boolean).join(" ");
}

function normalizeSignal(value: string): string {
  return value
    .toLowerCase()
    .replace(/[^a-z0-9\s-]/g, " ")
    .replace(/\s+/g, " ")
    .trim()
    .slice(0, 80);
}

function collectSignals(answers: Record<string, ProfileAnswer>, tag: "disgust" | "captivating_traits"): string[] {
  const questions = getQuestionsDocument().questions.filter((question) => question.tags.includes(tag));
  const signals = new Set<string>();

  for (const question of questions) {
    const answer = answers[question.id];
    if (!answer) {
      continue;
    }

    const values = Array.isArray(answer.answer)
      ? answer.answer
      : answer.answer.split(/[.;,\n]/).map((item) => item.trim());

    for (const value of values) {
      const normalized = normalizeSignal(value);
      if (normalized.length >= 3) {
        signals.add(normalized);
      }
    }
  }

  return [...signals].slice(0, 32);
}

function profileTextForEmbedding(answers: Record<string, ProfileAnswer>, narrativeSummary: string): string {
  const questions = getQuestionsDocument().questions;
  const lines = questions
    .map((question) => {
      const answer = answers[question.id];
      return answer ? `${question.prompt}\n${answerText(answer)}` : "";
    })
    .filter(Boolean);

  return [narrativeSummary, ...lines].join("\n\n");
}

export async function getMyProfile(userId: string) {
  const { data, error } = await supabaseAdmin
    .from("profiles")
    .select("*")
    .eq("user_id", userId)
    .maybeSingle();

  if (error) {
    throw error;
  }

  return data;
}

export async function upsertMyProfile(userId: string, input: UpsertProfileInput) {
  const { data, error } = await supabaseAdmin
    .from("profiles")
    .upsert(
      {
        user_id: userId,
        display_name: input.displayName,
        age: input.age,
        location: input.location ?? null,
        gender: input.gender ?? null,
        interested_in: input.interestedIn ?? []
      },
      { onConflict: "user_id" }
    )
    .select("*")
    .single();

  if (error) {
    throw error;
  }

  return data;
}

export async function saveProfileAnswer(userId: string, questionId: string, input: Omit<ProfileAnswer, "questionId" | "updatedAt">) {
  if (!isKnownQuestionId(questionId)) {
    throw new HttpError(400, "unknown_question", `Unknown question id: ${questionId}`);
  }

  const profile = await getMyProfile(userId);
  if (!profile) {
    throw new HttpError(409, "profile_required", "Create the basic profile before saving answers");
  }

  const answers = (profile.answers ?? {}) as Record<string, ProfileAnswer>;
  answers[questionId] = {
    questionId,
    answer: input.answer,
    followup: input.followup,
    dealbreakerSeverity: input.dealbreakerSeverity,
    updatedAt: new Date().toISOString()
  };

  const { data, error } = await supabaseAdmin
    .from("profiles")
    .update({ answers, profile_complete: false })
    .eq("user_id", userId)
    .select("*")
    .single();

  if (error) {
    throw error;
  }

  return data;
}

export async function completeMyProfile(userId: string) {
  const profile = await getMyProfile(userId);
  if (!profile) {
    throw new HttpError(409, "profile_required", "Create the basic profile before completing the profile");
  }

  const answers = (profile.answers ?? {}) as Record<string, ProfileAnswer>;
  const requiredQuestionIds = getQuestionsDocument().questions.map((question) => question.id);
  const missing = requiredQuestionIds.filter((questionId) => !answers[questionId]);
  if (missing.length > 0) {
    throw new HttpError(422, "profile_incomplete", `Missing required answers: ${missing.join(", ")}`);
  }

  const narrativeSummary = await summarizeProfile(answers);
  const embedding = await createEmbedding(profileTextForEmbedding(answers, narrativeSummary));
  const disgustTriggers = collectSignals(answers, "disgust");
  const captivatingTraits = collectSignals(answers, "captivating_traits");

  const { data, error } = await supabaseAdmin
    .from("profiles")
    .update({
      narrative_summary: narrativeSummary,
      embedding,
      disgust_triggers: disgustTriggers,
      captivating_traits: captivatingTraits,
      profile_complete: true
    })
    .eq("user_id", userId)
    .select("*")
    .single();

  if (error) {
    throw error;
  }

  return data;
}

export async function markUserPaid(userId: string, stripeCustomerId?: string | null, sessionId?: string | null) {
  const paidAt = new Date().toISOString();

  const { error: entitlementError } = await supabaseAdmin
    .from("user_entitlements")
    .upsert(
      {
        user_id: userId,
        entry_paid: true,
        stripe_customer_id: stripeCustomerId,
        stripe_checkout_session_id: sessionId,
        paid_at: paidAt
      },
      { onConflict: "user_id" }
    );

  if (entitlementError) {
    throw entitlementError;
  }

  const { error: profileError } = await supabaseAdmin
    .from("profiles")
    .update({ paid_entry: true })
    .eq("user_id", userId);

  if (profileError) {
    throw profileError;
  }
}