import { desc, eq } from 'drizzle-orm';

import type { NpOutreachDatabase, NpOutreachTransaction } from '#~/db/db.js';
import { schema } from '#~/db/db.js';

export interface MatchDetail {
  match: {
    id: string;
    totalScore: number;
    subscores: unknown;
    rationale: unknown;
    easyWin: boolean;
    isHero: boolean;
    reviewStatus: 'pending' | 'approved' | 'rejected' | 'edited';
  };
  org: {
    id: string;
    name: string;
    city: string | null;
    state: string;
    ein: string | null;
    nteeCode: string | null;
    totalRevenue: number | null;
    registrationNumber: string | null;
    missionStatement: string | null;
    profileConfidence: number | null;
    programs: unknown;
    knownFunders: unknown;
    staff: unknown;
    serviceGeography: string | null;
    profileSources: unknown;
  };
  grant: {
    id: string;
    title: string;
    funder: string;
    funderEin: string | null;
    synopsis: string | null;
    awardFloor: number | null;
    awardCeiling: number | null;
    closeDate: Date | null;
    sourceUrl: string;
    source: string;
    eligibilityEntityTypes: string[] | null;
    geographicScope: string | null;
    applicationEffortEstimate: string;
  };
  /** Part XV application info from the funder's latest parsed 990-PF
   * (form required, deadlines, restrictions, preselected-only flag). */
  funderApplicationInfo: unknown;
  /** For 990-PF matches: the funder's actual giving history into the
   * org's state — the concrete evidence behind the precedent subscore. */
  funderGivingHistory: Array<{
    recipientName: string;
    recipientCity: string | null;
    amount: number | null;
    purpose: string | null;
    taxYear: number;
  }>;
}

export async function serverGetMatchDetail(
  db: NpOutreachDatabase | NpOutreachTransaction,
  matchId: string,
): Promise<MatchDetail | null> {
  const rows = await db
    .select({
      matchId: schema.matches.id,
      totalScore: schema.matches.totalScore,
      subscores: schema.matches.subscores,
      rationale: schema.matches.rationale,
      easyWin: schema.matches.easyWin,
      isHero: schema.matches.isHero,
      reviewStatus: schema.matches.reviewStatus,
      orgId: schema.orgs.id,
      orgName: schema.orgs.name,
      orgCity: schema.orgs.city,
      orgState: schema.orgs.state,
      orgEin: schema.orgs.ein,
      orgNtee: schema.orgs.nteeCode,
      orgRevenue: schema.orgs.totalRevenue,
      orgRegNo: schema.orgs.registrationNumber,
      grantId: schema.grants.id,
      grantTitle: schema.grants.title,
      grantFunder: schema.grants.funder,
      grantFunderEin: schema.grants.funderEin,
      grantSynopsis: schema.grants.synopsis,
      grantFloor: schema.grants.awardFloor,
      grantCeiling: schema.grants.awardCeiling,
      grantClose: schema.grants.closeDate,
      grantSourceUrl: schema.grants.sourceUrl,
      grantSource: schema.grants.source,
      grantEligibility: schema.grants.eligibilityEntityTypes,
      grantGeo: schema.grants.geographicScope,
      grantEffort: schema.grants.applicationEffortEstimate,
      grantProgramAwards: schema.grants.programStateAwards,
    })
    .from(schema.matches)
    .innerJoin(schema.orgs, eq(schema.matches.orgId, schema.orgs.id))
    .innerJoin(schema.grants, eq(schema.matches.grantId, schema.grants.id))
    .where(eq(schema.matches.id, matchId))
    .limit(1);

  const row = rows[0];
  if (row == null) return null;

  const profiles = await db
    .select({
      missionStatement: schema.orgProfiles.missionStatement,
      confidence: schema.orgProfiles.confidence,
      programs: schema.orgProfiles.programs,
      knownFunders: schema.orgProfiles.knownFunders,
      staff: schema.orgProfiles.staff,
      serviceGeography: schema.orgProfiles.serviceGeography,
      sources: schema.orgProfiles.sources,
    })
    .from(schema.orgProfiles)
    .where(eq(schema.orgProfiles.orgId, row.orgId))
    .limit(1);

  let funderGivingHistory: MatchDetail['funderGivingHistory'] = [];
  let funderApplicationInfo: unknown = null;
  if (row.grantFunderEin == null && Array.isArray(row.grantProgramAwards)) {
    // Federal grants: USASpending program awards fill the same evidence
    // table (recipient/amount/year) the 990-PF history uses.
    funderGivingHistory = (
      row.grantProgramAwards as Array<{
        recipientName?: string;
        amount?: number | null;
        startDate?: string | null;
      }>
    ).map((a) => ({
      recipientName: a.recipientName ?? 'Unknown recipient',
      recipientCity: null,
      amount: a.amount ?? null,
      purpose: null,
      taxYear: a.startDate != null ? Number(a.startDate.slice(0, 4)) : 0,
    }));
  }
  if (row.grantFunderEin != null) {
    const funderRow = await db
      .select({ applicationInfo: schema.funders.applicationInfo })
      .from(schema.funders)
      .where(eq(schema.funders.ein, row.grantFunderEin))
      .limit(1);
    funderApplicationInfo = funderRow[0]?.applicationInfo ?? null;
    const funderRows = await db
      .select({
        recipientName: schema.funderGrants.recipientName,
        recipientCity: schema.funderGrants.recipientCity,
        recipientState: schema.funderGrants.recipientState,
        amount: schema.funderGrants.amount,
        purpose: schema.funderGrants.purpose,
        taxYear: schema.funderGrants.taxYear,
      })
      .from(schema.funderGrants)
      .innerJoin(
        schema.funders,
        eq(schema.funderGrants.funderId, schema.funders.id),
      )
      .where(eq(schema.funders.ein, row.grantFunderEin))
      .orderBy(desc(schema.funderGrants.taxYear), desc(schema.funderGrants.amount))
      .limit(200);

    // In-state grants first (the precedent evidence), then the rest.
    funderGivingHistory = [...funderRows]
      .sort((a, b) => {
        const aIn = a.recipientState === row.orgState ? 0 : 1;
        const bIn = b.recipientState === row.orgState ? 0 : 1;
        return aIn - bIn;
      })
      .slice(0, 40)
      .map(({ recipientState: _s, ...rest }) => rest);
  }

  return {
    match: {
      id: row.matchId,
      totalScore: row.totalScore,
      subscores: row.subscores,
      rationale: row.rationale,
      easyWin: row.easyWin,
      isHero: row.isHero,
      reviewStatus: row.reviewStatus,
    },
    org: {
      id: row.orgId,
      name: row.orgName,
      city: row.orgCity,
      state: row.orgState,
      ein: row.orgEin,
      nteeCode: row.orgNtee,
      totalRevenue: row.orgRevenue,
      registrationNumber: row.orgRegNo,
      missionStatement: profiles[0]?.missionStatement ?? null,
      profileConfidence: profiles[0]?.confidence ?? null,
      programs: profiles[0]?.programs ?? null,
      knownFunders: profiles[0]?.knownFunders ?? null,
      staff: profiles[0]?.staff ?? null,
      serviceGeography: profiles[0]?.serviceGeography ?? null,
      profileSources: profiles[0]?.sources ?? null,
    },
    grant: {
      id: row.grantId,
      title: row.grantTitle,
      funder: row.grantFunder,
      funderEin: row.grantFunderEin,
      synopsis: row.grantSynopsis,
      awardFloor: row.grantFloor,
      awardCeiling: row.grantCeiling,
      closeDate: row.grantClose,
      sourceUrl: row.grantSourceUrl,
      source: row.grantSource,
      eligibilityEntityTypes: row.grantEligibility,
      geographicScope: row.grantGeo,
      applicationEffortEstimate: row.grantEffort,
    },
    funderApplicationInfo,
    funderGivingHistory,
  };
}