import { desc, eq } from 'drizzle-orm';
import { campaign, leadHandover, deal, area } from '@cockpit/db';
import { CampaignSchemas } from '@cockpit/shared';
import { router, protectedProcedure } from '../trpc.js';

const MARKETING_AREA_SLUG = 'marketing';

export const campaignRouter = router({
  list: protectedProcedure.query(async ({ ctx }) => {
    return ctx.db.select().from(campaign).orderBy(desc(campaign.createdAt));
  }),

  create: protectedProcedure
    .input(CampaignSchemas.createCampaignInput)
    .mutation(async ({ ctx, input }) => {
      const a = (
        await ctx.db.select().from(area).where(eq(area.slug, MARKETING_AREA_SLUG)).limit(1)
      )[0];
      if (!a) throw new Error('Marketing-Area fehlt — bitte seed laufen lassen.');
      const [created] = await ctx.db
        .insert(campaign)
        .values({
          areaId: a.id,
          name: input.name,
          status: input.status,
          reach: input.reach,
          ownerUserId: input.ownerUserId ?? null,
        })
        .returning();
      return created;
    }),

  funnel: protectedProcedure.query(async ({ ctx }) => {
    // Lead-Funnel: simple Aggregation der bekannten Quellen.
    const campaigns = await ctx.db.select().from(campaign);
    const reichweite = campaigns.reduce((acc, c) => acc + c.reach, 0);
    const handovers = await ctx.db.select().from(leadHandover);
    const leads = handovers.length;
    const deals = await ctx.db.select().from(deal);
    const mql = deals.filter((d) => ['erstgespraech', 'demo', 'angebot'].includes(d.stage)).length;
    const uebergabe = handovers.length;
    // Frontend kann die Stage-Übergänge daraus rendern.
    return {
      reichweite,
      website: Math.round(reichweite * 0.2), // Placeholder bis ein Tracking-Feed existiert.
      leads,
      mql,
      uebergabe,
    };
  }),

  crosslink: protectedProcedure.query(async ({ ctx }) => {
    const handovers = await ctx.db.select().from(leadHandover);
    const dealsFromHandovers = handovers.filter((h) => h.dealId !== null).length;
    // Won-Volumen aus Handover-bezogenen Deals dieses Quartals.
    const dealRows = await ctx.db.select().from(deal);
    const wonValue = dealRows
      .filter((d) => d.wonAt)
      .reduce((acc, d) => acc + (d.wonValueEur ?? 0), 0);
    return {
      uebergebenSeitTagen: 30,
      leadsUebergeben: handovers.length,
      dealsErzeugt: dealsFromHandovers,
      gewonneneEurQuartal: wonValue,
    };
  }),
});