import { supabase } from "@/integrations/supabase/client";

export type VarMap = Record<string, string>;

export type LoadedContext = {
  client?: any;
  cases?: any;
  clientFields: { key: string; label: string; value: string }[];
  caseFields: { key: string; label: string; value: string }[];
};

export type VarChip = { token: string; label: string; value: string };

export async function loadPleadingContext(
  clientId: string | null,
  caseId: string | null,
): Promise<LoadedContext> {
  const result: LoadedContext = { clientFields: [], caseFields: [] };

  if (clientId) {
    const { data: client } = await supabase.from("clients").select("*").eq("id", clientId).maybeSingle();
    if (client) result.client = client;
    const [{ data: defs }, { data: vals }] = await Promise.all([
      supabase.from("custom_client_fields").select("id, key, label").eq("active", true).order("sort_order"),
      supabase.from("client_field_values").select("field_id, value").eq("client_id", clientId),
    ]);
    const valMap = new Map((vals || []).map((v: any) => [v.field_id, v.value || ""]));
    result.clientFields = (defs || []).map((d: any) => ({
      key: d.key,
      label: d.label,
      value: valMap.get(d.id) || "",
    }));
  }

  if (caseId) {
    const { data: caseRow } = await supabase.from("cases").select("*").eq("id", caseId).maybeSingle();
    if (caseRow) result.cases = caseRow;
    const [{ data: defs }, { data: vals }] = await Promise.all([
      supabase.from("custom_case_fields").select("id, key, label").eq("active", true).order("sort_order"),
      supabase.from("case_field_values").select("field_id, value").eq("case_id", caseId),
    ]);
    const valMap = new Map((vals || []).map((v: any) => [v.field_id, v.value || ""]));
    result.caseFields = (defs || []).map((d: any) => ({
      key: d.key,
      label: d.label,
      value: valMap.get(d.id) || "",
    }));
  }

  return result;
}

function fmtAddress(o: any): string {
  if (!o) return "";
  const parts = [
    o.address_line1,
    o.address_line2,
    [o.city, o.state, o.postal_code].filter(Boolean).join(", "),
  ].filter(Boolean);
  return parts.join("\n");
}

export function buildVarMap(ctx: LoadedContext): VarMap {
  const m: VarMap = {};
  const c = ctx.client;
  if (c) {
    m["client.name"] = c.name || "";
    m["clientName"] = c.name || "";
    m["client.address"] = fmtAddress(c);
    m["clientAddress"] = fmtAddress(c);
    m["client.address_line1"] = c.address_line1 || "";
    m["clientAddressLine1"] = c.address_line1 || "";
    m["client.address_line2"] = c.address_line2 || "";
    m["clientAddressLine2"] = c.address_line2 || "";
    m["client.city"] = c.city || "";
    m["client.state"] = c.state || "";
    m["client.postal_code"] = c.postal_code || "";
    m["client.contact_name"] = c.primary_contact_name || "";
    m["clientContactName"] = c.primary_contact_name || "";
    m["client.contact_email"] = c.primary_contact_email || "";
    m["clientContactEmail"] = c.primary_contact_email || "";
    m["client.contact_phone"] = c.primary_contact_phone || "";
    m["clientContactPhone"] = c.primary_contact_phone || "";
    m["client.management_company"] = c.management_company || "";
    m["managementCompany"] = c.management_company || "";
  }
  const k = ctx.cases;
  if (k) {
    m["case.number"] = k.case_number || "";
    m["caseNumber"] = k.case_number || "";
    m["case.title"] = k.title || "";
    m["caseTitle"] = k.title || "";
    m["case.caption"] = k.case_caption || "";
    m["caseCaption"] = k.case_caption || "";
    m["case.court"] = k.court || "";
    m["court"] = k.court || "";
    m["case.court_case_number"] = k.court_case_number || "";
    m["courtCaseNumber"] = k.court_case_number || "";
    m["case.judge"] = k.judge || "";
    m["judge"] = k.judge || "";
    m["case.jurisdiction"] = k.jurisdiction || "";
    m["jurisdiction"] = k.jurisdiction || "";
    m["case.opposing_party"] = k.opposing_party || "";
    m["opposingParty"] = k.opposing_party || "";
    m["case.opposing_counsel"] = k.opposing_counsel || "";
    m["opposingCounsel"] = k.opposing_counsel || "";
    m["case.opposing_counsel_firm"] = k.opposing_counsel_firm || "";
    m["opposingCounselFirm"] = k.opposing_counsel_firm || "";
    m["case.opposing_counsel_email"] = k.opposing_counsel_email || "";
    m["opposingCounselEmail"] = k.opposing_counsel_email || "";
    m["case.opposing_counsel_phone"] = k.opposing_counsel_phone || "";
    m["opposingCounselPhone"] = k.opposing_counsel_phone || "";
    m["case.filing_date"] = k.filing_date || "";
    m["filingDate"] = k.filing_date || "";
    m["case.next_hearing_date"] = k.next_hearing_date || "";
    m["nextHearingDate"] = k.next_hearing_date || "";
  }
  ctx.clientFields.forEach((f) => {
    m[`client.field.${f.key}`] = f.value;
    m[`client.custom.${f.key}`] = f.value;
  });
  ctx.caseFields.forEach((f) => {
    m[`case.field.${f.key}`] = f.value;
    m[`case.custom.${f.key}`] = f.value;
    m[`custom.${f.key}`] = f.value;
  });
  return m;
}

export function buildChips(ctx: LoadedContext): VarChip[] {
  const m = buildVarMap(ctx);
  const out: VarChip[] = [];
  const labelMap: Record<string, string> = {
    "client.name": "Client name",
    clientName: "Client name",
    "client.address": "Client address (full)",
    clientAddress: "Client address (full)",
    "client.contact_name": "Client primary contact",
    clientContactName: "Client primary contact",
    "client.contact_email": "Client contact email",
    clientContactEmail: "Client contact email",
    "client.contact_phone": "Client contact phone",
    clientContactPhone: "Client contact phone",
    "client.management_company": "Management company",
    managementCompany: "Management company",
    "case.number": "Case number",
    caseNumber: "Case number",
    "case.title": "Case title",
    caseTitle: "Case title",
    "case.caption": "Case caption",
    caseCaption: "Case caption",
    "case.court": "Court",
    court: "Court",
    "case.court_case_number": "Court case number",
    courtCaseNumber: "Court case number",
    "case.judge": "Judge",
    judge: "Judge",
    "case.opposing_party": "Opposing party",
    opposingParty: "Opposing party",
    "case.opposing_counsel": "Opposing counsel",
    opposingCounsel: "Opposing counsel",
    "case.opposing_counsel_firm": "Opposing counsel firm",
    opposingCounselFirm: "Opposing counsel firm",
    "case.filing_date": "Filing date",
    filingDate: "Filing date",
    "case.next_hearing_date": "Next hearing date",
    nextHearingDate: "Next hearing date",
  };
  for (const key of Object.keys(m)) {
    let label = labelMap[key];
    if (!label) {
      if (key.startsWith("client.field.")) label = `Client · ${key.replace("client.field.", "")}`;
      else if (key.startsWith("client.custom.")) label = `Client · ${key.replace("client.custom.", "")}`;
      else if (key.startsWith("case.field.")) label = `Case · ${key.replace("case.field.", "")}`;
      else if (key.startsWith("case.custom.")) label = `Case · ${key.replace("case.custom.", "")}`;
      else if (key.startsWith("custom.")) label = `Case · ${key.replace("custom.", "")}`;
      else label = key;
    }
    out.push({ token: `{{${key}}}`, label, value: m[key] });
  }
  return out;
}

const TOKEN_RE = /\{\{\s*([a-zA-Z0-9_.]+)\s*\}\}/g;

export function applyVars(text: string, map: VarMap): string {
  if (!text) return text;
  return text.replace(TOKEN_RE, (_, key) => (key in map ? map[key] : `{{${key}}}`));
}

export function applyVarsToHtml(html: string, map: VarMap): string {
  return applyVars(html, map);
}