import { z } from "zod";
import { SUPPORT_CASE_STATUS, SUPPORT_CASE_PRIORITY, SUPPORT_CASE_CATEGORY } from "./contract.js";

/**
 * Portal status values - customer-friendly statuses only
 *
 * Internal Salesforce statuses are mapped to these customer-facing values:
 * - "新規" → New
 * - "対応中", "Awaiting Approval", "VPN Pending", "Pending" → In Progress
 * - "完了済み" (Replied) → Awaiting Customer
 * - "Closed" → Closed
 */
const supportCaseStatusValues = [
  SUPPORT_CASE_STATUS.NEW,
  SUPPORT_CASE_STATUS.IN_PROGRESS,
  SUPPORT_CASE_STATUS.AWAITING_CUSTOMER,
  SUPPORT_CASE_STATUS.CLOSED,
] as const;

/**
 * Portal priority values (mapped from Salesforce Japanese API names)
 */
const supportCasePriorityValues = [
  SUPPORT_CASE_PRIORITY.LOW,
  SUPPORT_CASE_PRIORITY.MEDIUM,
  SUPPORT_CASE_PRIORITY.HIGH,
] as const;

const supportCaseCategoryValues = [
  SUPPORT_CASE_CATEGORY.TECHNICAL,
  SUPPORT_CASE_CATEGORY.BILLING,
  SUPPORT_CASE_CATEGORY.GENERAL,
  SUPPORT_CASE_CATEGORY.FEATURE_REQUEST,
] as const;

export const supportCaseStatusSchema = z.enum(supportCaseStatusValues);
export const supportCasePrioritySchema = z.enum(supportCasePriorityValues);
export const supportCaseCategorySchema = z.enum(supportCaseCategoryValues);

/**
 * Support case schema - compatible with Salesforce Case object
 * ID is a string (Salesforce ID format: 15 or 18 char alphanumeric)
 */
export const supportCaseSchema = z.object({
  id: z.string().min(15).max(18),
  caseNumber: z.string(),
  subject: z.string().min(1),
  status: supportCaseStatusSchema,
  priority: supportCasePrioritySchema,
  category: supportCaseCategorySchema.nullable(),
  createdAt: z.string(),
  updatedAt: z.string(),
  closedAt: z.string().nullable(),
  description: z.string(),
});

export const supportCaseSummarySchema = z.object({
  total: z.number().int().nonnegative(),
  open: z.number().int().nonnegative(),
  highPriority: z.number().int().nonnegative(),
  resolved: z.number().int().nonnegative(),
});

export const supportCaseListSchema = z.object({
  cases: z.array(supportCaseSchema),
  summary: supportCaseSummarySchema,
});

export const supportCaseFilterSchema = z
  .object({
    status: supportCaseStatusSchema.optional(),
    priority: supportCasePrioritySchema.optional(),
    category: supportCaseCategorySchema.optional(),
    search: z.string().trim().min(1).optional(),
  })
  .default({});

/**
 * Request schema for creating a new support case
 */
export const createCaseRequestSchema = z.object({
  subject: z.string().min(1).max(255),
  description: z.string().min(1).max(32000),
  category: supportCaseCategorySchema.optional(),
  priority: supportCasePrioritySchema.optional(),
});

/**
 * Response schema for case creation
 */
export const createCaseResponseSchema = z.object({
  id: z.string(),
  caseNumber: z.string(),
});

/**
 * Public contact form schema (unauthenticated)
 */
export const publicContactRequestSchema = z.object({
  name: z.string().min(1, "Name is required"),
  email: z.string().email("Valid email required"),
  phone: z.string().optional(),
  subject: z.string().min(1, "Subject is required"),
  message: z.string().min(10, "Message must be at least 10 characters"),
});

// ============================================================================
// Case Message Schemas (for conversation view)
// ============================================================================

/**
 * Message type - either from email exchange or case comment
 */
export const caseMessageTypeSchema = z.enum(["email", "comment"]);

/**
 * Message direction for emails
 */
export const caseMessageDirectionSchema = z.enum(["inbound", "outbound"]);

/**
 * Unified case message schema - represents either an EmailMessage or CaseComment
 * Used for displaying conversation threads in the portal
 */
export const caseMessageSchema = z.object({
  /** Unique identifier (EmailMessage.Id or CaseComment.Id) */
  id: z.string(),
  /** Message type: email or comment */
  type: caseMessageTypeSchema,
  /** Message body/content */
  body: z.string(),
  /** Who sent/wrote the message */
  author: z.object({
    name: z.string(),
    email: z.string().nullable(),
    isCustomer: z.boolean(),
  }),
  /** When the message was created/sent */
  createdAt: z.string(),
  /** For emails: inbound (customer→agent) or outbound (agent→customer) */
  direction: caseMessageDirectionSchema.nullable(),
  /** Whether the message has attachments (for emails) */
  hasAttachment: z.boolean().optional(),
});

/**
 * List of case messages for conversation view
 */
export const caseMessageListSchema = z.object({
  messages: z.array(caseMessageSchema),
  /** Case thread identifier for email threading */
  threadId: z.string().nullable(),
});

/**
 * Request schema for adding a comment to a case
 */
export const addCaseCommentRequestSchema = z.object({
  body: z.string().min(1, "Message is required").max(32000),
});

/**
 * Response schema for adding a comment
 */
export const addCaseCommentResponseSchema = z.object({
  id: z.string(),
  createdAt: z.string(),
});

// ============================================================================
// Type Exports
// ============================================================================

export type SupportCaseStatus = z.infer<typeof supportCaseStatusSchema>;
export type SupportCasePriority = z.infer<typeof supportCasePrioritySchema>;
export type SupportCaseCategory = z.infer<typeof supportCaseCategorySchema>;
export type SupportCase = z.infer<typeof supportCaseSchema>;
export type SupportCaseSummary = z.infer<typeof supportCaseSummarySchema>;
export type SupportCaseList = z.infer<typeof supportCaseListSchema>;
export type SupportCaseFilter = z.infer<typeof supportCaseFilterSchema>;
export type CreateCaseRequest = z.infer<typeof createCaseRequestSchema>;
export type CreateCaseResponse = z.infer<typeof createCaseResponseSchema>;
export type PublicContactRequest = z.infer<typeof publicContactRequestSchema>;
export type CaseMessageType = z.infer<typeof caseMessageTypeSchema>;
export type CaseMessageDirection = z.infer<typeof caseMessageDirectionSchema>;
export type CaseMessage = z.infer<typeof caseMessageSchema>;
export type CaseMessageList = z.infer<typeof caseMessageListSchema>;
export type AddCaseCommentRequest = z.infer<typeof addCaseCommentRequestSchema>;
export type AddCaseCommentResponse = z.infer<typeof addCaseCommentResponseSchema>;