/**
 * Tool definitions for the internal-data package.
 *
 * Three read-only ops-tier tools backed by the injected InternalDataClient:
 *   - lookup_work_order
 *   - lookup_purchase_order
 *   - lookup_site
 *
 * All three require the `ops:read` scope (§3 of design.md).
 *
 * Finance-tier note: these tools are ops-tier, so `redact()` is not called on
 * their responses. If a future refactor moves payment or financial amounts here,
 * call redact() on those fields per the design requirement that finance handlers
 * MUST redact sensitive output.
 *
 * The client is passed in at server startup (not imported from a module-level
 * singleton) so that tests can inject a mock without AWS credentials.
 */

import { defineTool, requireScope } from '@sh-mcp/shared';
import type { AuthContext } from '@sh-mcp/shared';
import type { InternalDataClient } from './client.js';

// ---------------------------------------------------------------------------
// Input / output types
// ---------------------------------------------------------------------------

export interface LookupWorkOrderInput {
  workOrderId: string;
}

export interface LookupWorkOrderOutput {
  found: boolean;
  workOrder?: {
    workOrderId: string;
    title: string;
    status: string;
    siteId?: string;
    assignedTo?: string;
    createdAt: string;
    updatedAt: string;
    description?: string;
  };
}

export interface LookupPurchaseOrderInput {
  purchaseOrderId: string;
}

export interface LookupPurchaseOrderOutput {
  found: boolean;
  purchaseOrder?: {
    purchaseOrderId: string;
    vendor: string;
    status: string;
    totalAmount?: number;
    currency?: string;
    issuedAt: string;
    updatedAt: string;
    lineItems?: Array<{ description: string; quantity: number; unitPrice: number }>;
  };
}

export interface LookupSiteInput {
  siteId: string;
}

export interface LookupSiteOutput {
  found: boolean;
  site?: {
    siteId: string;
    name: string;
    address?: string;
    region?: string;
    status: string;
    assignedTechnicians?: string[];
  };
}

// ---------------------------------------------------------------------------
// Tool factories — call makeTools(client) once at server startup
// ---------------------------------------------------------------------------

export function makeTools(client: InternalDataClient) {
  const lookupWorkOrder = defineTool<LookupWorkOrderInput, LookupWorkOrderOutput>({
    name: 'lookup_work_order',
    description:
      'Retrieve a Sea Haven work order by its ID. Returns current status, assigned site, ' +
      'assigned technician, and description. Returns found=false when the ID does not exist.',
    tier: 'ops',
    requiredScope: 'ops:read',
    inputSchema: {
      type: 'object',
      required: ['workOrderId'],
      additionalProperties: false,
      properties: {
        workOrderId: {
          type: 'string',
          description: 'The unique work-order identifier (e.g. WO-20240101-001).',
          minLength: 1,
          maxLength: 128,
        },
      },
    },
    handler: async (
      input: LookupWorkOrderInput,
      ctx: AuthContext,
    ): Promise<LookupWorkOrderOutput> => {
      requireScope(ctx, 'ops:read');

      const record = await client.getWorkOrder(input.workOrderId);

      if (record === null) {
        return { found: false };
      }

      return {
        found: true,
        workOrder: {
          workOrderId: record.workOrderId,
          title: record.title,
          status: record.status,
          siteId: record.siteId,
          assignedTo: record.assignedTo,
          createdAt: record.createdAt,
          updatedAt: record.updatedAt,
          description: record.description,
        },
      };
    },
  });

  const lookupPurchaseOrder = defineTool<LookupPurchaseOrderInput, LookupPurchaseOrderOutput>({
    name: 'lookup_purchase_order',
    description:
      'Retrieve a Sea Haven purchase order by its ID. Returns vendor name, status, total amount, ' +
      'and line items. Returns found=false when the ID does not exist.',
    tier: 'ops',
    requiredScope: 'ops:read',
    inputSchema: {
      type: 'object',
      required: ['purchaseOrderId'],
      additionalProperties: false,
      properties: {
        purchaseOrderId: {
          type: 'string',
          description: 'The unique purchase-order identifier (e.g. PO-2024-00123).',
          minLength: 1,
          maxLength: 128,
        },
      },
    },
    handler: async (
      input: LookupPurchaseOrderInput,
      ctx: AuthContext,
    ): Promise<LookupPurchaseOrderOutput> => {
      requireScope(ctx, 'ops:read');

      const record = await client.getPurchaseOrder(input.purchaseOrderId);

      if (record === null) {
        return { found: false };
      }

      return {
        found: true,
        purchaseOrder: {
          purchaseOrderId: record.purchaseOrderId,
          vendor: record.vendor,
          status: record.status,
          totalAmount: record.totalAmount,
          currency: record.currency,
          issuedAt: record.issuedAt,
          updatedAt: record.updatedAt,
          lineItems: record.lineItems,
        },
      };
    },
  });

  const lookupSite = defineTool<LookupSiteInput, LookupSiteOutput>({
    name: 'lookup_site',
    description:
      'Retrieve a Sea Haven site assignment record by its ID. Returns site name, address, ' +
      'region, status, and assigned technicians. Returns found=false when the ID does not exist.',
    tier: 'ops',
    requiredScope: 'ops:read',
    inputSchema: {
      type: 'object',
      required: ['siteId'],
      additionalProperties: false,
      properties: {
        siteId: {
          type: 'string',
          description: 'The unique site identifier (e.g. SITE-NYC-001).',
          minLength: 1,
          maxLength: 128,
        },
      },
    },
    handler: async (input: LookupSiteInput, ctx: AuthContext): Promise<LookupSiteOutput> => {
      requireScope(ctx, 'ops:read');

      const record = await client.getSite(input.siteId);

      if (record === null) {
        return { found: false };
      }

      return {
        found: true,
        site: {
          siteId: record.siteId,
          name: record.name,
          address: record.address,
          region: record.region,
          status: record.status,
          assignedTechnicians: record.assignedTechnicians,
        },
      };
    },
  });

  return [lookupWorkOrder, lookupPurchaseOrder, lookupSite] as const;
}