// services/landlordService.ts
// Handle landlord-specific operations, onboarding workflow, and dashboard data

import { and, desc, eq, or } from "drizzle-orm";
import { db } from "../db/db.ts";
import {
  leases,
  messages,
  payment_methods,
  properties,
  tenant_applications,
  users,
} from "../db/schema.ts";
import { DashboardTenantApplication } from "./tenantApplicationService.ts";
import {
  DashboardMaintenanceRequest,
  getMaintenanceDataByLandlord,
} from "./maintenanceRequestService.ts";
import { DashboardMessage } from "./messageService.ts";
import {
  Lease,
  Message,
  PaymentMethod,
  Property,
  TenantApplication,
  User,
} from "../db/interfaces.ts";
import { getUser, updateUser } from "./userService.ts";
import {
  getE2ELandlordDashboardData,
  getE2EPaymentMethodsByUser,
  getE2EPropertiesByOwner,
  getE2EUserById,
  isE2EEnabled,
} from "./e2eFixtures.ts";

export interface LandlordOnboardingData {
  user_id: string;
  current_step: number;
  steps_completed: {
    profile_setup: boolean;
    email_verification: boolean;
    property_added: boolean;
    payment_setup: boolean;
    first_property_published: boolean;
  };
  total_steps: number;
  completion_percentage: number;
}

export interface LandlordDashboardData {
  propertyData: {
    total: number;
    available: number;
    occupied: number;
    draft: number;
  };
  properties?: Property[];
  leaseData: {
    active: number;
    draft: number;
    expired: number;
  };
  applicationData: {
    pending: number;
    total_this_month: number;
  };
  paymentData: {
    expected_this_month: number;
    received_this_month: number;
    overdue: number;
  };
  tenantApplications?: DashboardTenantApplication[];
  maintenanceRequests?: DashboardMaintenanceRequest[];
  recentMessages?: DashboardMessage[];
  monthlyRevenue?: number;
}

// Extended dashboard interface with additional UI data arrays
export interface ExtendedLandlordDashboardData extends LandlordDashboardData {
  tenantApplications: DashboardTenantApplication[];
  maintenanceRequests: DashboardMaintenanceRequest[];
  recentMessages: DashboardMessage[];
  monthlyRevenue?: number;
}

// Initialize landlord user type and onboarding
export async function initializeLandlordOnboarding(user_id: string) {
  const now = Date.now();
  return await updateUser(user_id, {
    user_type: "landlord",
    onboarding_step: 1,
    email_verified: false,
    banking_setup_complete: false,
    updated_on: now,
  });
}

// Update onboarding step
export async function updateOnboardingStep(user_id: string, step: number) {
  const now = Date.now();
  return await updateUser(user_id, {
    onboarding_step: step,
    updated_on: now,
  });
}

// Update landlord onboarding step (alias for compatibility with routes)
export async function updateLandlordOnboardingStep(
  user_id: string,
  step: number,
) {
  return await updateOnboardingStep(user_id, step);
}

// Mark email as verified
export async function markEmailVerified(user_id: string) {
  const now = Date.now();
  return await updateUser(user_id, {
    email_verified: true,
    updated_on: now,
  });
}

// Mark banking setup as complete
export async function markBankingSetupComplete(user_id: string) {
  const now = Date.now();
  return await updateUser(user_id, {
    banking_setup_complete: true,
    updated_on: now,
  });
}

// Get landlord onboarding status
export async function getLandlordOnboardingStatus(
  user_id: string,
): Promise<LandlordOnboardingData> {
  if (isE2EEnabled()) {
    const user = getE2EUserById(user_id);
    if (!user) {
      throw new Error("User not found");
    }
    const propertiesResult = getE2EPropertiesByOwner(user_id);
    const paymentMethodsResult = getE2EPaymentMethodsByUser(user_id);
    const steps_completed = {
      profile_setup: !!(user.name && user.email && user.phone),
      email_verification: user.email_verified || false,
      property_added: propertiesResult.length > 0,
      payment_setup: paymentMethodsResult.length > 0,
      first_property_published: propertiesResult.some((p) =>
        p.rental_status === "available"
      ),
    };

    const completed_count = Object.values(steps_completed).filter(Boolean)
      .length;
    const total_steps = 5;
    const completion_percentage = Math.round(
      (completed_count / total_steps) * 100,
    );

    return {
      user_id,
      current_step: user.onboarding_step || 1,
      steps_completed,
      total_steps,
      completion_percentage,
    };
  }
  // Get user data
  const user = await getUser(user_id);

  if (!user) {
    throw new Error("User not found");
  }

  // Get properties count
  const propertiesResult = await db.select()
    .from(properties)
    .where(eq(properties.owner_id, user_id));

  // Get payment methods count
  const paymentMethodsResult = await db.select()
    .from(payment_methods)
    .where(eq(payment_methods.user_id, user_id));

  // Determine completion status
  const steps_completed = {
    profile_setup: !!(user.name && user.email && user.phone),
    email_verification: user.email_verified || false,
    property_added: propertiesResult.length > 0,
    payment_setup: paymentMethodsResult.length > 0,
    first_property_published: propertiesResult.some((p) =>
      p.rental_status === "available"
    ),
  };

  const completed_count = Object.values(steps_completed).filter(Boolean).length;
  const total_steps = 5;
  const completion_percentage = Math.round(
    (completed_count / total_steps) * 100,
  );

  return {
    user_id,
    current_step: user.onboarding_step || 1,
    steps_completed,
    total_steps,
    completion_percentage,
  };
}

// Get landlord dashboard data
export async function getLandlordDashboardData(
  user_id: string,
): Promise<LandlordDashboardData> {
  if (isE2EEnabled()) {
    return getE2ELandlordDashboardData(user_id);
  }
  // Get properties data
  const propertiesResult = await db.select()
    .from(properties)
    .where(eq(properties.owner_id, user_id));

  // Get leases data
  const leasesResult = await db.select()
    .from(leases)
    .where(eq(leases.owner_id, user_id));

  // Get applications data
  const property_ids = propertiesResult.map((p) => p.id);
  let applicationsResult: TenantApplication[] = [];

  if (property_ids.length > 0) {
    // In a real implementation, you'd use an IN clause
    // For now, we'll get all applications and filter
    applicationsResult = await db.select()
      .from(tenant_applications);

    applicationsResult = applicationsResult.filter((app) =>
      app.property_id && property_ids.includes(app.property_id)
    );
  }

  const tenantApplications = await db.select({
    id: tenant_applications.id,
    property_id: tenant_applications.property_id,
    applicant_id: tenant_applications.applicant_id,
    application_status: tenant_applications.application_status,
    application_data_encrypted: tenant_applications.application_data_encrypted,
    submitted_on: tenant_applications.submitted_on,
    reviewed_on: tenant_applications.reviewed_on,
    applicant_name: users.name,
    applicant_email: users.email,
    property_address: properties.address_1,
  })
    .from(tenant_applications)
    .innerJoin(properties, eq(tenant_applications.property_id, properties.id))
    .leftJoin(users, eq(tenant_applications.applicant_id, users.id))
    .where(eq(properties.owner_id, user_id))
    .orderBy(tenant_applications.submitted_on);

  const maintenanceRequests = await getMaintenanceDataByLandlord(user_id);

  const recentMessages = await db.select({
    id: messages.id,
    lease_id: messages.lease_id,
    sender_id: messages.sender_id,
    recipient_id: messages.recipient_id,
    message_type: messages.message_type,
    subject: messages.subject,
    content: messages.content,
    content_encrypted: messages.content_encrypted,
    is_read: messages.is_read,
    created_on: messages.created_on,
    sender_name: users.name,
  })
    .from(messages)
    .leftJoin(users, eq(messages.sender_id, users.id))
    .where(or(
      eq(messages.sender_id, user_id),
      eq(messages.recipient_id, user_id),
    ))
    .orderBy(desc(messages.created_on))
    .limit(10) as unknown as DashboardMessage[];

  // Calculate current month timestamp range
  const now = new Date();
  const startOfMonth = new Date(now.getFullYear(), now.getMonth(), 1).getTime();
  const endOfMonth = new Date(
    now.getFullYear(),
    now.getMonth() + 1,
    0,
    23,
    59,
    59,
  ).getTime();

  // Calculate dashboard metrics
  const dashboardData: LandlordDashboardData = {
    propertyData: {
      total: propertiesResult.length,
      available:
        propertiesResult.filter((p) => p.rental_status === "available").length,
      occupied:
        propertiesResult.filter((p) => p.rental_status === "occupied").length,
      draft: propertiesResult.filter((p) => p.rental_status === "draft").length,
    },
    properties: propertiesResult,
    leaseData: {
      active: leasesResult.filter((l) => l.lease_status === "active").length,
      draft: leasesResult.filter((l) => l.lease_status === "draft").length,
      expired: leasesResult.filter((l) => l.lease_status === "expired").length,
    },
    applicationData: {
      pending:
        applicationsResult.filter((app) => app.application_status === "pending")
          .length,
      total_this_month: applicationsResult.filter((app) =>
        app.submitted_on &&
        app.submitted_on >= startOfMonth && app.submitted_on <= endOfMonth
      ).length,
    },
    paymentData: {
      expected_this_month: leasesResult
        .filter((l) => l.lease_status === "active")
        .reduce((sum, lease) => sum + (lease.rent || 0), 0),
      received_this_month: 0, // Would need payment_transactions data
      overdue: 0, // Would need payment_transactions data with due date logic
    },
    tenantApplications: tenantApplications.map((app) => ({
      ...app,
      applicant_name: app.applicant_name ?? undefined,
      applicant_email: app.applicant_email ?? undefined,
      property_address: app.property_address ?? undefined,
      status: app.application_status || "pending",
      created_at: app.submitted_on ?? null,
    })),
    maintenanceRequests,
    recentMessages: recentMessages.map((message) => ({
      ...message,
      sender_name: message.sender_name || "Tenant",
      created_at: message.created_on ?? null,
    })),
    monthlyRevenue: propertiesResult.reduce(
      (sum, property) => sum + (property.monthly_rent || 0),
      0,
    ),
  };

  return dashboardData;
}

// Check if user is a landlord
export async function isUserLandlord(user_id: string): Promise<boolean> {
  if (isE2EEnabled()) {
    const user = getE2EUserById(user_id);
    return Boolean(
      user && (user.user_type === "landlord" || user.onboarded_landlord),
    );
  }
  const result = await db.select()
    .from(users)
    .where(and(
      eq(users.id, user_id),
      or(eq(users.user_type, "landlord"), eq(users.onboarded_landlord, true)),
    ));

  return result.length > 0;
}

// Get landlord profile
export async function getLandlordProfile(user_id: string) {
  const result = await db.select()
    .from(users)
    .where(and(
      eq(users.id, user_id),
      or(eq(users.user_type, "landlord"), eq(users.onboarded_landlord, true)),
    ));

  return result[0] || null;
}

// Complete onboarding
export async function completeLandlordOnboarding(user_id: string) {
  const now = Date.now();
  return await db.update(users)
    .set({
      onboarding_step: 6, // Completed
      updated_on: now,
    })
    .where(eq(users.id, user_id))
    .returning();
}

// Get onboarding progress for multiple landlords (admin function)
export async function getAllLandlordsOnboardingProgress() {
  const result = await db.select()
    .from(users)
    .where(
      or(eq(users.user_type, "landlord"), eq(users.onboarded_landlord, true)),
    );

  return result.map((user) => ({
    user_id: user.id,
    name: user.name,
    email: user.email,
    onboarding_step: user.onboarding_step || 1,
    email_verified: user.email_verified || false,
    banking_setup_complete: user.banking_setup_complete || false,
    started_on: user.started_on,
  }));
}