import { Injectable, Logger } from "@nestjs/common";
import { DataSource } from "typeorm";

import { FileUploadField } from "../modules/file-upload-settings/entities/file-upload-field.entity";
import { FileUploadSetting } from "../modules/file-upload-settings/entities/file-upload-setting.entity";

interface OnboardingField {
  fileKey: string;
  fileLabel: string;
  helpText: string;
  isRequired: boolean;
  isMultiple: boolean;
  maxFiles: number;
  allowedExtensions: string[];
  maxSizeMb: number;
  displayOrder: number;
}

const DOC_EXTENSIONS = ["pdf", "jpg", "jpeg", "png"];

/** Documents required from an Ethiopian company at onboarding. */
const ETHIOPIAN_ONBOARDING_FIELDS: OnboardingField[] = [
  {
    fileKey: "tin_certificate",
    fileLabel: "TIN Certificate",
    helpText: "Verified against the TIN registry during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 1,
  },
  {
    fileKey: "commercial_license",
    fileLabel: "Commercial License",
    helpText: "Verified against the government trade system during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 2,
  },
  {
    fileKey: "national_id",
    fileLabel: "National ID",
    helpText: "Verified against the National ID API during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 3,
  },
];

/** Documents required from a Foreign company at onboarding. */
const FOREIGN_ONBOARDING_FIELDS: OnboardingField[] = [
  {
    fileKey: "tin_certificate",
    fileLabel: "TIN Certificate",
    helpText: "Verified against the TIN registry during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 1,
  },
  {
    fileKey: "investment_license",
    fileLabel: "Investment License",
    helpText: "Investment license issued for operating in Ethiopia.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 2,
  },
  {
    fileKey: "national_id",
    fileLabel: "National ID",
    helpText: "National ID of the company's authorized representative.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 3,
  },
  {
    fileKey: "passport",
    fileLabel: "Passport",
    helpText: "Passport of the company's authorized representative.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 4,
  },
];

/** Legacy combined set, kept for the older per-company-type codes. */
const LEGACY_ONBOARDING_FIELDS: OnboardingField[] = [
  {
    fileKey: "business_license",
    fileLabel: "Business License / Trade License",
    helpText: "Verified against the government trade system during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 1,
  },
  {
    fileKey: "tin_certificate",
    fileLabel: "TIN Certificate",
    helpText: "Verified against the TIN registry during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 2,
  },
  {
    fileKey: "national_id_passport",
    fileLabel: "National ID / Passport",
    helpText: "Verified against the National ID API during registration.",
    isRequired: true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder: 3,
  },
];

interface OnboardingDocumentSetting {
  code: string;
  label: string;
  entity: string;
  fields: OnboardingField[];
}

const COMPANY_ONBOARDING_DOCUMENTS: OnboardingDocumentSetting[] = [
  // Nationality-based sets — the document requirements depend only on whether
  // the company is Ethiopian or Foreign (same for importer/exporter/forwarder).
  {
    code: "company_onboarding_documents_ethiopian",
    label: "Ethiopian company onboarding documents",
    entity: "customer",
    fields: ETHIOPIAN_ONBOARDING_FIELDS,
  },
  {
    code: "company_onboarding_documents_foreign",
    label: "Foreign company onboarding documents",
    entity: "customer",
    fields: FOREIGN_ONBOARDING_FIELDS,
  },
  // Legacy per-company-type codes (kept for back-compat; no longer used by the portal).
  {
    code: "company_onboarding_documents_customer",
    label: "Customer onboarding documents",
    entity: "customer",
    fields: LEGACY_ONBOARDING_FIELDS,
  },
  {
    code: "company_onboarding_documents_forwarder",
    label: "Forwarder onboarding documents",
    entity: "other",
    fields: LEGACY_ONBOARDING_FIELDS,
  },
  {
    code: "company_onboarding_documents_transporter",
    label: "Transporter onboarding documents",
    entity: "other",
    fields: LEGACY_ONBOARDING_FIELDS,
  },
  {
    code: "company_onboarding_documents_forwarder_dj",
    label: "Djibouti forwarder onboarding documents",
    entity: "other",
    fields: LEGACY_ONBOARDING_FIELDS,
  },
];

const COMPANY_ONBOARDING_DESCRIPTION =
  "Required documents for external company onboarding, by company nationality.";

// ── Clearance document settings ────────────────────────────────────────────
// Operation/clearance documents collected after contract counter-sign, resolved
// at runtime from (operationType, freightType, includesCustoms). The `entity`
// is "booking_clearance" so the backoffice file-settings editor can filter them.
// Two kinds of set per customs category: a CUSTOMER-INPUT set (the customer
// uploads) and a GL-OUTPUT set (Global Logistics uploads the customs outputs).

const JPG_EXTENSIONS = ["jpg", "jpeg", "png", "pdf"];
const CLEARANCE_ENTITY = "booking_clearance";

/** Build a clearance field with sensible defaults; `critical` marks isRequired. */
function clearanceField(
  fileKey: string,
  fileLabel: string,
  displayOrder: number,
  opts?: { required?: boolean; help?: string; extensions?: string[] },
): OnboardingField {
  return {
    fileKey,
    fileLabel,
    helpText: opts?.help ?? "",
    isRequired: opts?.required ?? true,
    isMultiple: false,
    maxFiles: 1,
    allowedExtensions: opts?.extensions ?? DOC_EXTENSIONS,
    maxSizeMb: 10,
    displayOrder,
  };
}

/** Documents shared by every container import category (with/without customs). */
const IMPORT_CONTAINER_FIELDS: OnboardingField[] = [
  clearanceField("commercial_invoice", "Commercial Invoice", 1),
  clearanceField("packing_list", "Packing List", 2),
  clearanceField("import_license", "Import License", 3),
  clearanceField("certificate_of_origin", "Certificate of Origin", 4),
  clearanceField(
    "external_freight_cost",
    "External Freight Cost / Checkup Documentation",
    5,
  ),
  clearanceField("bill_of_lading", "Bill of Lading / Railway Bill", 6),
  clearanceField("vgm", "Verified Gross Mass (VGM)", 7, { required: true }),
  clearanceField("release_order", "Release Order", 8, { required: true }),
];

/** Documents shared by every container export category (with/without customs). */
const EXPORT_CONTAINER_FIELDS: OnboardingField[] = [
  clearanceField("booking_confirmation", "Booking Confirmation", 1),
  clearanceField("commercial_invoice", "Commercial Invoice", 2),
  clearanceField("packing_list", "Packing List", 3),
  clearanceField("shipping_instruction", "Shipping Instruction", 4),
  clearanceField("bank_permit", "Bank Permit", 5),
  clearanceField("export_license", "Export License", 6),
  clearanceField("vgm_letter", "VGM Letter", 7, { required: true }),
  clearanceField("railway_bill", "Railway Bill", 8),
  clearanceField("delegation_letter", "Delegation Letter / POA", 9, {
    required: false,
    help: "Required only if EDR manages all transit activity.",
  }),
];

/** Bulk import documents (shorter, transit-focused set). */
const IMPORT_BULK_FIELDS: OnboardingField[] = [
  clearanceField("packing_list", "Packing List", 1, { required: true }),
  clearanceField("bill_of_loading", "Bill of Loading", 2, { required: true }),
  clearanceField("port_invoice", "Port Invoice", 3),
];

/** Bulk export documents (transit/customs corridor docs). */
const EXPORT_BULK_FIELDS: OnboardingField[] = [
  clearanceField("release_order_djibouti", "Release Order (Djibouti)", 1),
  clearanceField("port_gate_pass", "Port Gate Pass", 2),
  clearanceField("port_invoice", "Port Invoice", 3),
];

/** GL-uploaded customs output documents (import container). */
const IMPORT_CONTAINER_OUTPUT_FIELDS: OnboardingField[] = [
  clearanceField("im4", "IM4 — Permanent Import Document", 1),
  clearanceField("im5", "IM5 — Temporary Import Document", 2, {
    required: false,
  }),
  clearanceField("transit_permitted", "Transit Permitted Screenshot", 3, {
    extensions: JPG_EXTENSIONS,
  }),
];

/** GL-uploaded customs output documents (export container). */
const EXPORT_CONTAINER_OUTPUT_FIELDS: OnboardingField[] = [
  clearanceField("ex3", "EX3 — Permanent Export Document", 1),
  clearanceField("ex8", "EX8 — Export Transit Document", 2),
  clearanceField("export_release", "Export Release", 3),
  clearanceField("t1", "T1 — Transport Document", 4),
];

const CLEARANCE_DOCUMENT_SETTINGS: OnboardingDocumentSetting[] = [
  // ── Customer-input sets ──
  {
    code: "clearance_import_container_with_customs",
    label: "Import container clearance documents (with customs)",
    entity: CLEARANCE_ENTITY,
    fields: IMPORT_CONTAINER_FIELDS,
  },
  {
    code: "clearance_import_container_without_customs",
    label: "Import container documents (without customs)",
    entity: CLEARANCE_ENTITY,
    fields: IMPORT_CONTAINER_FIELDS,
  },
  {
    code: "clearance_export_container_with_customs",
    label: "Export container clearance documents (with customs)",
    entity: CLEARANCE_ENTITY,
    fields: EXPORT_CONTAINER_FIELDS,
  },
  {
    code: "clearance_export_container_without_customs",
    label: "Export container documents (without customs)",
    entity: CLEARANCE_ENTITY,
    fields: EXPORT_CONTAINER_FIELDS,
  },
  {
    code: "clearance_import_bulk_with_customs",
    label: "Import bulk clearance documents (with customs)",
    entity: CLEARANCE_ENTITY,
    fields: IMPORT_BULK_FIELDS,
  },
  {
    code: "clearance_import_bulk_without_customs",
    label: "Import bulk documents (without customs)",
    entity: CLEARANCE_ENTITY,
    fields: IMPORT_BULK_FIELDS,
  },
  {
    code: "clearance_export_bulk_with_customs",
    label: "Export bulk clearance documents (with customs)",
    entity: CLEARANCE_ENTITY,
    fields: EXPORT_BULK_FIELDS,
  },
  {
    code: "clearance_export_bulk_without_customs",
    label: "Export bulk documents (without customs)",
    entity: CLEARANCE_ENTITY,
    fields: EXPORT_BULK_FIELDS,
  },
  // ── GL-output sets (customs only) ──
  {
    code: "clearance_output_import_container",
    label: "Customs output documents (import container)",
    entity: CLEARANCE_ENTITY,
    fields: IMPORT_CONTAINER_OUTPUT_FIELDS,
  },
  {
    code: "clearance_output_export_container",
    label: "Customs output documents (export container)",
    entity: CLEARANCE_ENTITY,
    fields: EXPORT_CONTAINER_OUTPUT_FIELDS,
  },
];

const CLEARANCE_DESCRIPTION =
  "Operation/clearance documents collected after contract execution, by operation, freight type and customs.";

@Injectable()
export class FileUploadSettingsSeeder {
  private readonly logger = new Logger(FileUploadSettingsSeeder.name);

  constructor(private readonly dataSource: DataSource) {}

  async run() {
    await this.dataSource.transaction(async (manager) => {
      const settingRepository = manager.getRepository(FileUploadSetting);
      const fieldRepository = manager.getRepository(FileUploadField);

      const allSettings: Array<
        OnboardingDocumentSetting & { description: string }
      > = [
        ...COMPANY_ONBOARDING_DOCUMENTS.map((s) => ({
          ...s,
          description: COMPANY_ONBOARDING_DESCRIPTION,
        })),
        ...CLEARANCE_DOCUMENT_SETTINGS.map((s) => ({
          ...s,
          description: CLEARANCE_DESCRIPTION,
        })),
      ];

      for (const documentSetting of allSettings) {
        await settingRepository.upsert(
          {
            code: documentSetting.code,
            label: documentSetting.label,
            description: documentSetting.description,
            entity: documentSetting.entity,
          },
          {
            conflictPaths: { code: true },
          },
        );

        const setting = await settingRepository.findOne({
          where: { code: documentSetting.code },
          select: { id: true, code: true },
        });

        if (!setting) {
          throw new Error(`file_upload_setting_seed_failed:${documentSetting.code}`);
        }

        await fieldRepository.delete({ settingId: setting.id });

        await fieldRepository.insert(
          documentSetting.fields.map((field, index) => ({
            settingId: setting.id,
            fileKey: field.fileKey,
            fileLabel: field.fileLabel,
            helpText: field.helpText,
            isRequired: field.isRequired,
            isMultiple: field.isMultiple,
            maxFiles: field.maxFiles,
            allowedExtensions: [...field.allowedExtensions],
            maxSizeMb: field.maxSizeMb,
            displayOrder: field.displayOrder ?? index + 1,
          })),
        );
      }
    });

    this.logger.log(
      "Ensured company onboarding + booking clearance file upload settings",
    );
  }
}