<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * Unit tests for WPDO_Zone_Router — central zone dispatch and module-name resolution.
 */
class ZoneRouterTest extends TestCase {

	/** Last SQL passed to $wpdb->query(). */
	public static string $last_query = '';

	/** Last $wpdb->delete() call args: [table, where, formats]. */
	public static array $last_delete = [];

	/** Stub return for $wpdb->get_var(). */
	public static mixed $get_var_return = null;

	protected function setUp(): void {
		self::$last_query   = '';
		self::$last_delete  = [];
		self::$get_var_return = null;
		$this->setup_wpdb_mock();
	}

	private function setup_wpdb_mock(): void {
		global $wpdb;
		$wpdb = new class {
			public string $prefix = 'wp_';
			public function prepare( string $sql, mixed ...$args ): string {
				$i = 0;
				return preg_replace_callback( '/%([sd])/', static function ( $m ) use ( &$i, $args ) {
					$val = $args[ $i++ ] ?? '';
					return $m[1] === 'd' ? (string) (int) $val : "'" . addslashes( (string) $val ) . "'";
				}, $sql );
			}
			public function query( string $sql ): int {
				ZoneRouterTest::$last_query = $sql;
				return 1;
			}
			public function get_var( string $sql ): mixed {
				ZoneRouterTest::$last_query = $sql;
				return ZoneRouterTest::$get_var_return;
			}
			public function insert( string $table, array $data, mixed $formats = null ): int {
				ZoneRouterTest::$last_query = "INSERT INTO `{$table}`";
				return 1;
			}
			public function delete( string $table, array $where, array $formats ): void {
				ZoneRouterTest::$last_delete = [ $table, $where, $formats ];
			}
			public function get_row( string $sql, string $output = OBJECT ): mixed {
				ZoneRouterTest::$last_query = $sql;
				return null;
			}
		};
	}

	// ── module_name ───────────────────────────────────────────────────────────

	public function test_module_name_hot_prepends_zone(): void {
		$this->assertSame( 'hot_hp_listing', WPDO_Zone_Router::module_name( 'hot', 'hp_listing' ) );
	}

	public function test_module_name_cold_prepends_zone(): void {
		$this->assertSame( 'cold_hp_listing', WPDO_Zone_Router::module_name( 'cold', 'hp_listing' ) );
	}

	public function test_module_name_warm_ignores_post_type(): void {
		$this->assertSame( 'warm', WPDO_Zone_Router::module_name( 'warm', 'hp_listing' ) );
	}

	public function test_module_name_archive_ignores_post_type(): void {
		$this->assertSame( 'archive', WPDO_Zone_Router::module_name( 'archive', 'hp_listing' ) );
	}

	public function test_module_name_unknown_zone_returns_unknown(): void {
		$this->assertSame( 'unknown', WPDO_Zone_Router::module_name( 'other', 'hp_listing' ) );
	}

	public function test_module_name_sanitizes_post_type(): void {
		// sanitize_key strips spaces and lowercases; 'HP Listing' → 'hplisting'.
		$this->assertSame( 'hot_hplisting', WPDO_Zone_Router::module_name( 'hot', 'HP Listing' ) );
	}

	// ── read ─────────────────────────────────────────────────────────────────

	public function test_read_hot_calls_zone_hot_get(): void {
		$field = array( 'zone' => 'hot', 'column' => 'hp_price' );
		WPDO_Zone_Router::read( $field, 42, 'hp_listing', 'hp_price' );
		$this->assertStringContainsString( 'wpdo_hot_hp_listing', self::$last_query );
		$this->assertStringContainsString( 'hp_price', self::$last_query );
		$this->assertStringContainsString( '42', self::$last_query );
	}

	public function test_read_warm_calls_zone_warm_get(): void {
		$field = array( 'zone' => 'warm' );
		WPDO_Zone_Router::read( $field, 7, 'hp_listing', 'views' );
		$this->assertStringContainsString( 'wpdo_warm', self::$last_query );
	}

	public function test_read_cold_calls_zone_cold_get(): void {
		$field = array( 'zone' => 'cold' );
		WPDO_Zone_Router::read( $field, 5, 'hp_listing', 'hp_desc' );
		$this->assertStringContainsString( 'wpdo_cold_hp_listing', self::$last_query );
	}

	public function test_read_unknown_zone_returns_null(): void {
		$field  = array( 'zone' => 'other' );
		$result = WPDO_Zone_Router::read( $field, 1, 'hp_listing', 'key' );
		$this->assertNull( $result );
	}

	// ── write ─────────────────────────────────────────────────────────────────

	public function test_write_hot_calls_zone_hot_set(): void {
		$field = array( 'zone' => 'hot', 'column' => 'hp_price' );
		WPDO_Zone_Router::write( $field, 42, 'hp_listing', 'hp_price', '100' );
		$this->assertStringContainsString( 'wpdo_hot_hp_listing', self::$last_query );
		$this->assertStringContainsString( 'hp_price', self::$last_query );
	}

	public function test_write_warm_calls_zone_warm_set(): void {
		$field = array( 'zone' => 'warm', 'ttl' => null );
		WPDO_Zone_Router::write( $field, 7, 'hp_listing', 'views', '5' );
		$this->assertStringContainsString( 'wpdo_warm', self::$last_query );
	}

	public function test_write_warm_json_encodes_non_string_value(): void {
		$field = array( 'zone' => 'warm', 'ttl' => null );
		WPDO_Zone_Router::write( $field, 7, 'hp_listing', 'data', array( 'a' => 1 ) );
		$this->assertStringContainsString( 'wpdo_warm', self::$last_query );
	}

	public function test_write_unknown_zone_is_noop(): void {
		$field = array( 'zone' => 'other' );
		WPDO_Zone_Router::write( $field, 1, 'hp_listing', 'key', 'val' );
		$this->assertSame( '', self::$last_query );
	}

	// ── delete_field ──────────────────────────────────────────────────────────

	public function test_delete_field_hot_nulls_column(): void {
		$field = array( 'zone' => 'hot', 'column' => 'hp_price' );
		WPDO_Zone_Router::delete_field( $field, 42, 'hp_listing', 'hp_price' );
		$this->assertStringContainsString( 'wpdo_hot_hp_listing', self::$last_query );
		// Hot delete sets the column to NULL via an UPDATE.
		$this->assertStringContainsString( 'NULL', self::$last_query );
	}

	public function test_delete_field_warm_calls_delete(): void {
		$field = array( 'zone' => 'warm' );
		WPDO_Zone_Router::delete_field( $field, 7, 'hp_listing', 'views' );
		// Table name includes $wpdb->prefix ('wp_') + 'wpdo_warm'.
		$this->assertSame( 'wp_wpdo_warm', self::$last_delete[0] ?? '' );
	}

	public function test_delete_field_unknown_zone_is_noop(): void {
		$field = array( 'zone' => 'other' );
		WPDO_Zone_Router::delete_field( $field, 1, 'hp_listing', 'key' );
		$this->assertSame( '', self::$last_query );
		$this->assertSame( [], self::$last_delete );
	}

	// ── delete_post ───────────────────────────────────────────────────────────

	public function test_delete_post_skips_hot_when_no_hot_columns(): void {
		$sr = new ReflectionClass( WPDO_Schema_Registry::class );
		$sr->getProperty( 'instance' )->setValue( null, null );

		$captured = array();
		global $wpdb;
		$wpdb = new class( $captured ) {
			public string $prefix = 'wp_';
			public array  $log;
			public function __construct( array &$ref ) { $this->log = &$ref; }
			public function prepare( string $s, mixed ...$a ): string { return $s; }
			public function query( string $s ): int { return 1; }
			public function get_var( string $s ): mixed { return null; }
			public function insert( string $t, array $d, mixed $f = null ): int { return 1; }
			public function delete( string $table, array $where, array $formats ): void {
				$this->log[] = $table;
			}
		};

		WPDO_Zone_Router::delete_post( 1, 'hp_listing' );

		$this->assertNotContains( 'wp_wpdo_hot_hp_listing', $captured, 'Hot should be skipped when no columns registered' );
		$this->assertContains( 'wp_wpdo_warm', $captured );
		$this->assertContains( 'wp_wpdo_archive', $captured );
	}

	public function test_delete_post_deletes_hot_when_columns_registered(): void {
		$sr = new ReflectionClass( WPDO_Schema_Registry::class );
		$sr->getProperty( 'instance' )->setValue( null, null );

		WPDO_Schema_Registry::instance()->register( 'test', array(
			'post_type' => 'hp_listing',
			'meta_key'  => 'hp_price',
			'zone'      => 'hot',
			'column'    => 'hp_price',
			'type'      => 'decimal',
		) );

		$captured = array();
		global $wpdb;
		$wpdb = new class( $captured ) {
			public string $prefix = 'wp_';
			public array  $log;
			public function __construct( array &$ref ) { $this->log = &$ref; }
			public function prepare( string $s, mixed ...$a ): string { return $s; }
			public function query( string $s ): int { return 1; }
			public function get_var( string $s ): mixed { return null; }
			public function insert( string $t, array $d, mixed $f = null ): int { return 1; }
			public function delete( string $table, array $where, array $formats ): void {
				$this->log[] = $table;
			}
		};

		WPDO_Zone_Router::delete_post( 10, 'hp_listing' );

		$this->assertContains( 'wp_wpdo_hot_hp_listing', $captured );
	}

	public function test_delete_post_always_clears_warm_and_archive(): void {
		$sr = new ReflectionClass( WPDO_Schema_Registry::class );
		$sr->getProperty( 'instance' )->setValue( null, null );

		$captured = array();
		global $wpdb;
		$wpdb = new class( $captured ) {
			public string $prefix = 'wp_';
			public array  $log;
			public function __construct( array &$ref ) { $this->log = &$ref; }
			public function prepare( string $s, mixed ...$a ): string { return $s; }
			public function query( string $s ): int { return 1; }
			public function get_var( string $s ): mixed { return null; }
			public function insert( string $t, array $d, mixed $f = null ): int { return 1; }
			public function delete( string $table, array $where, array $formats ): void {
				$this->log[] = $table;
			}
		};

		WPDO_Zone_Router::delete_post( 5, 'hp_listing' );

		$this->assertContains( 'wp_wpdo_warm', $captured );
		$this->assertContains( 'wp_wpdo_archive', $captured );
	}
}