package com.saas.admin.entity;

import com.saas.shared.enums.AIProvider;
import jakarta.persistence.*;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.JdbcTypeCode;
import org.hibernate.annotations.UpdateTimestamp;
import org.hibernate.type.SqlTypes;

import java.time.LocalDateTime;
import java.util.Map;

/**
 * Tenant AI Configuration
 * 
 * Stores AI assistant configuration per tenant for automatic call routing
 * - Which AI provider to use (Vapi, Retell, Gemini)
 * - Assistant/Agent IDs for each provider
 * - Phone number mappings
 * - Routing rules (time-based, language-based, etc.)
 */
@Entity
@Table(name = "tenant_ai_config")
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class TenantAIConfig {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    /**
     * Tenant identifier (schema name)
     * Each tenant can have one AI configuration
     */
    @Column(name = "tenant_id", nullable = false, unique = true)
    private String tenantId;

    /**
     * Primary AI provider to use for incoming calls
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "primary_provider")
    private AIProvider primaryProvider;

    /**
     * Fallback AI provider if primary fails
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "fallback_provider")
    private AIProvider fallbackProvider;

    // ========== Vapi Configuration ==========

    /**
     * Vapi Assistant ID (from Vapi dashboard)
     * Example: "asst_abc123xyz"
     */
    @Column(name = "vapi_assistant_id")
    private String vapiAssistantId;

    /**
     * Vapi Phone Number ID (for inbound calls)
     * Example: "pn_abc123xyz"
     */
    @Column(name = "vapi_phone_number_id")
    private String vapiPhoneNumberId;

    /**
     * Vapi actual phone number (E.164 format)
     * Example: "+33123456789"
     */
    @Column(name = "vapi_phone_number")
    private String vapiPhoneNumber;

    // ========== Retell Configuration ==========

    /**
     * Retell Agent ID (from Retell dashboard)
     * Example: "agent_abc123xyz"
     */
    @Column(name = "retell_agent_id")
    private String retellAgentId;

    /**
     * Retell Phone Number ID (for inbound calls)
     * Example: "phone_abc123xyz"
     */
    @Column(name = "retell_phone_number_id")
    private String retellPhoneNumberId;

    /**
     * Retell actual phone number (E.164 format)
     * Example: "+33987654321"
     */
    @Column(name = "retell_phone_number")
    private String retellPhoneNumber;

    // ========== Routing Rules ==========

    /**
     * Advanced routing rules (JSON)
     * 
     * Examples:
     * - Time-based: Route to different assistants based on time of day
     * - Language-based: Detect caller language and route accordingly
     * - Queue-based: Route based on call volume
     * 
     * Format:
     * {
     * "timeRules": [
     * {"start": "09:00", "end": "17:00", "provider": "VAPI"},
     * {"start": "17:00", "end": "09:00", "provider": "RETELL"}
     * ],
     * "languageRules": {
     * "fr": "VAPI",
     * "en": "RETELL"
     * }
     * }
     */
    @JdbcTypeCode(SqlTypes.JSON)
    @Column(name = "routing_rules", columnDefinition = "JSON")
    private Map<String, Object> routingRules;

    /**
     * Whether this AI configuration is active
     */
    @Column(name = "enabled", nullable = false)
    @Builder.Default
    private Boolean enabled = true;

    /**
     * Priority level (1-10)
     * Used when multiple configs match
     */
    @Column(name = "priority")
    @Builder.Default
    private Integer priority = 5;

    @CreationTimestamp
    @Column(name = "created_at", nullable = false, updatable = false)
    private LocalDateTime createdAt;

    @UpdateTimestamp
    @Column(name = "updated_at")
    private LocalDateTime updatedAt;
}