/** Pull Clientify contacts/deals → warehouse (leads/deals). */

import { createHash } from 'crypto';
import { serviceHeaders, supabaseUrl } from '@/lib/agency';

const CFY = 'https://api.clientify.com/v1';

function uuid5(name: string): string {
  const NS = Buffer.from('6ba7b8119dad11d180b400c04fd430c8', 'hex');
  const hash = createHash('sha1').update(NS).update(name).digest();
  hash[6] = (hash[6]! & 0x0f) | 0x50;
  hash[8] = (hash[8]! & 0x3f) | 0x80;
  const h = hash.subarray(0, 16).toString('hex');
  return `${h.slice(0, 8)}-${h.slice(8, 12)}-${h.slice(12, 16)}-${h.slice(16, 20)}-${h.slice(20)}`;
}

function clientifyKeyForSlug(slug: string): string | null {
  const upper = slug.toUpperCase().replace(/-/g, '_');
  return (
    process.env[`CLIENTIFY_API_KEY_${upper}`]?.trim() ||
    process.env.CLIENTIFY_API_KEY?.trim() ||
    null
  );
}

async function cfyGet(token: string, path: string): Promise<Record<string, unknown>> {
  const r = await fetch(`${CFY}${path}`, {
    headers: {
      Authorization: `Token ${token}`,
      Accept: 'application/json',
    },
    cache: 'no-store',
  });
  if (!r.ok) {
    throw new Error(`Clientify ${path}: ${(await r.text()).slice(0, 180)}`);
  }
  return (await r.json()) as Record<string, unknown>;
}

async function cfyPaginate(
  token: string,
  path: string,
  maxPages = 40
): Promise<Record<string, unknown>[]> {
  const out: Record<string, unknown>[] = [];
  const base = path.split('?')[0] || path;
  const params = new URLSearchParams(path.includes('?') ? path.split('?')[1] : '');
  params.set('page_size', '100');
  for (let page = 1; page <= maxPages; page++) {
    params.set('page', String(page));
    const j = await cfyGet(token, `${base}?${params}`);
    const batch = (j.results as Record<string, unknown>[]) || [];
    out.push(...batch);
    if (!j.next || !batch.length) break;
  }
  return out;
}

function firstEmail(c: Record<string, unknown>): string | null {
  const emails = c.emails;
  if (!Array.isArray(emails) || !emails.length) return null;
  const e = emails[0] as Record<string, unknown> | string;
  if (typeof e === 'object' && e) {
    return String(e.email || e.value || '').trim() || null;
  }
  return String(e).trim() || null;
}

function firstPhone(c: Record<string, unknown>): string | null {
  const phones = c.phones;
  if (!Array.isArray(phones) || !phones.length) return null;
  const p = phones[0] as Record<string, unknown> | string;
  if (typeof p === 'object' && p) {
    return String(p.phone || p.value || '').trim() || null;
  }
  return String(p).trim() || null;
}

function parseDate(s: unknown): string | null {
  if (!s || typeof s !== 'string') return null;
  try {
    if (s.includes('T')) {
      return new Date(s).toISOString();
    }
    return new Date(`${s}T12:00:00Z`).toISOString();
  } catch {
    return null;
  }
}

function mapStage(deal: Record<string, unknown>): 'won' | 'lost' | 'open' {
  const desc = String(deal.status_desc || '')
    .trim()
    .toLowerCase();
  if (desc === 'won') return 'won';
  if (desc === 'lost') return 'lost';
  if (deal.status === 3) return 'won';
  if (deal.status === 4) return 'lost';
  return 'open';
}

function contactIdFromUrl(url: unknown): string | null {
  if (typeof url !== 'string' || !url) return null;
  const parts = url.replace(/\/$/, '').split('/');
  return parts[parts.length - 1] || null;
}

export type ClientifySyncResult = {
  tenantId: string;
  tenantSlug: string;
  leads: number;
  deals: number;
  error?: string;
};

export async function syncClientifyTenant(opts: {
  tenantId: string;
  slug: string;
  apiKey?: string | null;
}): Promise<ClientifySyncResult> {
  const headers = serviceHeaders();
  const base = supabaseUrl();
  if (!headers || !base) {
    return {
      tenantId: opts.tenantId,
      tenantSlug: opts.slug,
      leads: 0,
      deals: 0,
      error: 'no service role',
    };
  }

  const token = opts.apiKey?.trim() || clientifyKeyForSlug(opts.slug);
  if (!token) {
    return {
      tenantId: opts.tenantId,
      tenantSlug: opts.slug,
      leads: 0,
      deals: 0,
      error: `Falta CLIENTIFY_API_KEY (o CLIENTIFY_API_KEY_${opts.slug.toUpperCase().replace(/-/g, '_')})`,
    };
  }

  const tid = opts.tenantId;
  try {
    const contacts = await cfyPaginate(token, '/contacts/');
    await fetch(
      `${base}/rest/v1/leads?tenant_id=eq.${encodeURIComponent(tid)}&crm=eq.clientify`,
      { method: 'DELETE', headers: { ...headers, Prefer: 'return=minimal' } }
    );

    const contactToLead = new Map<string, string>();
    const leadRows = contacts.map((c) => {
      const cid = String(c.id);
      const lid = uuid5(`clientify-lead:${tid}:${cid}`);
      contactToLead.set(cid, lid);
      const source = String(
        c.contact_source || c.channel || c.medium || 'clientify'
      )
        .trim()
        .toLowerCase()
        .slice(0, 80) || 'clientify';
      const status =
        String(c.status || 'new')
          .trim()
          .toLowerCase()
          .slice(0, 40) || 'new';
      const name = [c.first_name, c.last_name]
        .map((x) => String(x || '').trim())
        .filter(Boolean)
        .join(' ');
      return {
        id: lid,
        tenant_id: tid,
        first_name: name || null,
        email: firstEmail(c),
        phone: firstPhone(c),
        source,
        medium: c.medium ? String(c.medium) : null,
        crm: 'clientify',
        crm_contact_id: cid,
        status,
        created_at: parseDate(c.created) || new Date().toISOString(),
      };
    });

    for (let i = 0; i < leadRows.length; i += 200) {
      const chunk = leadRows.slice(i, i + 200);
      const r = await fetch(`${base}/rest/v1/leads`, {
        method: 'POST',
        headers: {
          ...headers,
          'Content-Type': 'application/json',
          Prefer: 'return=minimal',
        },
        body: JSON.stringify(chunk),
      });
      if (!r.ok) {
        throw new Error(`insert leads: ${(await r.text()).slice(0, 180)}`);
      }
    }

    const deals = await cfyPaginate(token, '/deals/');
    await fetch(
      `${base}/rest/v1/deals?tenant_id=eq.${encodeURIComponent(tid)}&crm_deal_id=like.clientify:*`,
      { method: 'DELETE', headers: { ...headers, Prefer: 'return=minimal' } }
    );

    const dealRows = deals.map((d) => {
      const did = String(d.id);
      const stage = mapStage(d);
      const cid = contactIdFromUrl(d.contact);
      const leadId = cid ? contactToLead.get(cid) || null : null;
      const amount = Number(d.amount || d.amount_user || 0) || 0;
      const closed = parseDate(d.actual_closed_date);
      const pipeUrl = String(d.pipeline || '');
      const pipeId = pipeUrl.includes('/pipelines/')
        ? pipeUrl.replace(/\/$/, '').split('/').pop() || null
        : null;
      let rawSrc = String(d.deal_source || d.contact_source || '')
        .trim()
        .slice(0, 80);
      const tags = Array.isArray(d.tags) ? d.tags.map(String).join(' ').toLowerCase() : '';
      const name = String(d.name || '').slice(0, 200);
      if (!rawSrc) {
        if (/facebook|instagram|meta|\bfb\b/.test(tags)) rawSrc = 'meta';
        else if (/google/.test(tags)) rawSrc = 'google';
        else if (/woocommerce/.test(tags) || /^order /i.test(name))
          rawSrc = 'ecommerce';
      }
      return {
        id: uuid5(`clientify-deal:${tid}:${did}`),
        tenant_id: tid,
        lead_id: leadId,
        crm_deal_id: `clientify:${did}`,
        stage,
        amount,
        won_at: stage === 'won' ? closed : null,
        lost_at: stage === 'lost' ? closed : null,
        pipeline_id: pipeId,
        pipeline_name: d.pipeline_desc ? String(d.pipeline_desc) : null,
        source: rawSrc ? rawSrc.toLowerCase() : null,
        name: name || null,
      };
    });

    for (let i = 0; i < dealRows.length; i += 200) {
      const chunk = dealRows.slice(i, i + 200);
      const r = await fetch(`${base}/rest/v1/deals`, {
        method: 'POST',
        headers: {
          ...headers,
          'Content-Type': 'application/json',
          Prefer: 'return=minimal',
        },
        body: JSON.stringify(chunk),
      });
      if (!r.ok) {
        throw new Error(`insert deals: ${(await r.text()).slice(0, 180)}`);
      }
    }

    const now = new Date().toISOString();
    await fetch(
      `${base}/rest/v1/integrations?tenant_id=eq.${encodeURIComponent(tid)}&provider=eq.clientify`,
      {
        method: 'PATCH',
        headers: {
          ...headers,
          'Content-Type': 'application/json',
          Prefer: 'return=minimal',
        },
        body: JSON.stringify({
          status: 'connected',
          last_sync_at: now,
          error_message: null,
        }),
      }
    );

    return {
      tenantId: tid,
      tenantSlug: opts.slug,
      leads: leadRows.length,
      deals: dealRows.length,
    };
  } catch (e) {
    return {
      tenantId: tid,
      tenantSlug: opts.slug,
      leads: 0,
      deals: 0,
      error: e instanceof Error ? e.message : 'clientify sync failed',
    };
  }
}

/** Sync all tenants with clientify integration (+ API key available). */
export async function syncAllClientifyTenants(opts?: {
  tenantId?: string;
}): Promise<{ results: ClientifySyncResult[] }> {
  const headers = serviceHeaders();
  const base = supabaseUrl();
  if (!headers || !base) return { results: [] };

  const tRes = await fetch(
    `${base}/rest/v1/tenants?select=id,slug,name&agency_followed=neq.false`,
    { headers, cache: 'no-store' }
  );
  if (!tRes.ok) throw new Error(await tRes.text());
  let tenants = (await tRes.json()) as { id: string; slug: string; name: string }[];
  if (opts?.tenantId) {
    tenants = tenants.filter((t) => t.id === opts.tenantId);
  }

  const iRes = await fetch(
    `${base}/rest/v1/integrations?provider=eq.clientify&select=tenant_id,status,meta,external_account_id`,
    { headers, cache: 'no-store' }
  );
  if (!iRes.ok) throw new Error(await iRes.text());
  const ints = (await iRes.json()) as {
    tenant_id: string;
    status?: string;
    meta?: { api_key?: string } | null;
    external_account_id?: string | null;
  }[];
  const byTenant = new Map(ints.map((i) => [i.tenant_id, i]));

  const results: ClientifySyncResult[] = [];
  for (const t of tenants) {
    const integ = byTenant.get(t.id);
    // Sync if marked connected/pending OR we have a key for this slug
    const key =
      (integ?.meta && typeof integ.meta.api_key === 'string'
        ? integ.meta.api_key
        : null) || clientifyKeyForSlug(t.slug);
    if (!key && integ?.status !== 'connected' && integ?.status !== 'pending') {
      continue;
    }
    if (!key) {
      results.push({
        tenantId: t.id,
        tenantSlug: t.slug,
        leads: 0,
        deals: 0,
        error: `Sin API key Clientify para ${t.slug}`,
      });
      continue;
    }
    results.push(
      await syncClientifyTenant({
        tenantId: t.id,
        slug: t.slug,
        apiKey: key,
      })
    );
  }
  return { results };
}