<?php

namespace Blax\Addresses\Migrations;

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * Creates two tables:
     *  - `addresses`     – stores the physical address data (location, coordinates, etc.)
     *  - `address_links` – polymorphic pivot linking addresses to any Eloquent model
     */
    public function up(): void
    {
        /*
        |----------------------------------------------------------------------
        | addresses — the canonical address record
        |----------------------------------------------------------------------
        |
        | Designed to support worldwide formats, from a GPS point in the
        | wilderness to a specific room inside a skyscraper.
        |
        | Coordinate system:
        |   latitude / longitude  → WGS-84 decimal degrees
        |   altitude              → metres Above Mean Sea Level (AMSL)
        |
        */
        Schema::create(config('addresses.table_names.addresses', 'addresses'), function (Blueprint $table) {
            $table->id();

            // ── Street-level addressing ─────────────────────────────
            // Primary street line (street name + house/building number).
            $table->string('street')->nullable();

            // Additional line for c/o, suite, apartment, P.O. box, etc.
            $table->string('street_extra')->nullable();

            // ── Building / indoor precision ─────────────────────────
            // Building or complex name (e.g. "Empire State Building", "Block C").
            $table->string('building')->nullable();

            // Floor / level inside the building (string to allow "GF", "B2", "Mezzanine").
            $table->string('floor')->nullable();

            // Room, suite or unit number / name.
            $table->string('room')->nullable();

            // ── Postal / administrative divisions ───────────────────
            // Postal / ZIP code.
            $table->string('postal_code')->nullable();

            // City, town, village or locality name.
            $table->string('city')->nullable();

            // State, province, canton, prefecture or equivalent.
            $table->string('state')->nullable();

            // County, district or other sub-state administrative area.
            $table->string('county')->nullable();

            // ISO 3166-1 alpha-2 country code (e.g. "AT", "US", "JP").
            $table->string('country_code', 2)->nullable();

            // ── Coordinates (WGS-84) ────────────────────────────────
            // Latitude in decimal degrees (−90 to +90).
            $table->decimal('latitude', 10, 7)->nullable();

            // Longitude in decimal degrees (−180 to +180).
            $table->decimal('longitude', 10, 7)->nullable();

            // Altitude in metres above mean sea level (AMSL). Positive = above, negative = below.
            $table->decimal('altitude', 10, 2)->nullable();

            // ── Additional properties ───────────────────────────────
            // Free-form notes (e.g. delivery instructions, landmark descriptions).
            $table->text('notes')->nullable();

            // Flexible JSON bucket for any extra data the consuming app needs
            // (e.g. Plus Codes, what3words, timezone, formatted display string).
            $table->json('meta')->nullable();

            $table->timestamps();
            $table->softDeletes();

            // ── Indexes ─────────────────────────────────────────────
            $table->index('country_code');
            $table->index('postal_code');
            $table->index('city');
            $table->index(['latitude', 'longitude']);
        });

        /*
        |----------------------------------------------------------------------
        | address_links — polymorphic pivot ("addressable")
        |----------------------------------------------------------------------
        |
        | Links an address to any Eloquent model (User, Company, Order …).
        | The same address row can be linked to many models, and a single model
        | can have many addresses (each with a different purpose / type).
        |
        | `type`        – enum value describing the purpose of this link
        | `label`       – optional free-text override (handy for "Other" type)
        | `is_primary`  – marks ONE link per type per model as the primary
        | `active_from` – when this link becomes effective
        | `active_until`– when this link expires / is superseded
        | `meta`        – JSON bucket for developer-defined extra data
        |
        */
        Schema::create(config('addresses.table_names.address_links', 'address_links'), function (Blueprint $table) {
            $table->id();

            // ── Foreign key to the address ──────────────────────────
            $table->foreignId('address_id')
                ->constrained(config('addresses.table_names.addresses', 'addresses'))
                ->cascadeOnDelete();

            // ── Polymorphic owner ───────────────────────────────────
            // The model this address is linked to (e.g. App\Models\User, App\Models\Company).
            $table->morphs('addressable');

            // ── Link semantics ──────────────────────────────────────
            // The purpose of this link, drawn from AddressLinkType enum.
            $table->string('type')->default('other');

            // Optional human-readable label to refine or override the type
            // (useful when type = "other" or when several links share the same type).
            $table->string('label')->nullable();

            // Whether this is the primary address for this type on the model.
            $table->boolean('is_primary')->default(false);

            // ── Temporal validity ───────────────────────────────────
            // When this link becomes active (null = immediately).
            $table->timestamp('active_from')->nullable();

            // When this link ceases to be active (null = indefinitely).
            $table->timestamp('active_until')->nullable();

            // ── Extra data ──────────────────────────────────────────
            // JSON bucket for any developer-defined data on the pivot
            // (e.g. delivery window, access codes, department reference).
            $table->json('meta')->nullable();

            $table->timestamps();

            // ── Indexes ─────────────────────────────────────────────
            $table->index(['addressable_type', 'addressable_id', 'type'], 'addr_link_owner_type');
            $table->index('type');
            $table->index('is_primary');
        });

        /*
        |----------------------------------------------------------------------
        | address_assignments — reference an AddressLink from another context
        |----------------------------------------------------------------------
        |
        | While an AddressLink says "this Address belongs to User X as their
        | Office", an AddressAssignment says "Job Y uses that specific link
        | for its pickup location."
        |
        | `role`  – context-specific purpose (e.g. "pickup", "delivery", "origin")
        | `label` – optional free-text label
        | `meta`  – JSON bucket for developer-defined data
        |
        */
        Schema::create(config('addresses.table_names.address_assignments', 'address_assignments'), function (Blueprint $table) {
            $table->id();

            // ── Foreign key to the address link ─────────────────────
            $table->foreignId('address_link_id')
                ->constrained(config('addresses.table_names.address_links', 'address_links'))
                ->cascadeOnDelete();

            // ── Polymorphic consumer ────────────────────────────────
            // The model this address link is assigned to (e.g. Job, Order, Event).
            $table->morphs('assignable');

            // ── Assignment semantics ────────────────────────────────
            // Context-specific role for this assignment (e.g. "pickup", "delivery").
            $table->string('role')->nullable();

            // Optional human-readable label.
            $table->string('label')->nullable();

            // ── Extra data ──────────────────────────────────────────
            $table->json('meta')->nullable();

            $table->timestamps();

            // ── Indexes ─────────────────────────────────────────────
            $table->index(['assignable_type', 'assignable_id', 'role'], 'addr_assign_owner_role');
            $table->index('role');
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists(config('addresses.table_names.address_assignments', 'address_assignments'));
        Schema::dropIfExists(config('addresses.table_names.address_links', 'address_links'));
        Schema::dropIfExists(config('addresses.table_names.addresses', 'addresses'));
    }
};