<?php

declare(strict_types=1);

namespace FecaMailshots\Tests\Unit;

use FecaMailshots\Application\SourceMetadataProvider;

final class FakeMetadataProvider implements SourceMetadataProvider
{
    /** @var array<string, list<string>> */
    private array $fields;

    /** @param array<string, list<string>> $fields */
    public function __construct(array $fields)
    {
        $this->fields = $fields;
    }

    public function sourceExists(string $source): bool
    {
        return isset($this->fields[$source]);
    }

    public function sourceFields(string $source): array
    {
        return $this->fields[$source] ?? [];
    }

    public function hasEmailField(string $source): bool
    {
        return in_array('Email', $this->fields[$source] ?? [], true) || in_array('email', $this->fields[$source] ?? [], true);
    }

    public function joinPath(string $left, string $right): ?array
    {
        $pairs = [
            'contacts|accounts' => ['left' => 'contacts.Accountid', 'right' => 'accounts.ID'],
            'accounts|contacts' => ['left' => 'accounts.ID', 'right' => 'contacts.Accountid'],
            'renewals|accounts' => ['left' => 'renewals.account_id', 'right' => 'accounts.ID'],
            'accounts|renewals' => ['left' => 'accounts.ID', 'right' => 'renewals.account_id'],
            'renewals|contacts' => ['left' => 'renewals.account_id', 'right' => 'contacts.Accountid'],
            'contacts|renewals' => ['left' => 'contacts.Accountid', 'right' => 'renewals.account_id'],
            'articles|pages' => ['left' => 'articles.PageID', 'right' => 'pages.ID'],
            'pages|articles' => ['left' => 'pages.ID', 'right' => 'articles.PageID'],
            'pages|issues' => ['left' => 'pages.Issue', 'right' => 'issues.ID'],
            'issues|pages' => ['left' => 'issues.ID', 'right' => 'pages.Issue'],
            'ads|pages' => ['left' => 'ads.PageID', 'right' => 'pages.ID'],
            'pages|ads' => ['left' => 'pages.ID', 'right' => 'ads.PageID'],
            'ads|advertisers' => ['left' => 'ads.Advertiser', 'right' => 'advertisers.AdvertiserName'],
            'advertisers|ads' => ['left' => 'advertisers.AdvertiserName', 'right' => 'ads.Advertiser'],
            'invoices|ads' => ['left' => 'invoices.ad_id', 'right' => 'ads.ID'],
            'ads|invoices' => ['left' => 'ads.ID', 'right' => 'invoices.ad_id'],
            'invoices|issues' => ['left' => 'invoices.issue_id', 'right' => 'issues.ID'],
            'issues|invoices' => ['left' => 'issues.ID', 'right' => 'invoices.issue_id'],
        ];
        return $pairs[$left . '|' . $right] ?? null;
    }

    public function allKnownSources(): array
    {
        return array_keys($this->fields);
    }

    public function sourceTable(string $source): ?string
    {
        return $source;
    }

    public function fieldSql(string $source, string $field, string $alias): ?string
    {
        if (!isset($this->fields[$source]) || !in_array($field, $this->fields[$source], true)) {
            return null;
        }
        if ($source === 'ads' && $field === 'issue') {
            return '(SELECT p_issue.`Issue` FROM `pages` AS p_issue WHERE p_issue.`ID` = ' . $alias . '.`PageID`)';
        }
        $map = [
            'advertisers' => ['name' => 'AdvertiserName', 'advertisername' => 'AdvertiserName'],
            'ads' => ['id' => 'ID', 'advertiser' => 'Advertiser', 'adsize' => 'AdSize', 'size' => 'AdSize', 'price' => 'Price', 'pageid' => 'PageID', 'state' => 'State', 'notes' => 'Notes'],
            'pages' => ['id' => 'ID', 'issue' => 'Issue', 'page' => 'Page'],
            'articles' => ['id' => 'ID', 'pageid' => 'PageID', 'articlenumber' => 'ArticleNumber', 'article' => 'ArticleNumber', 'content' => 'Content', 'membername' => 'MemberName', 'author' => 'Author', 'dcn' => 'DCN', 'articlewords' => 'ArticleWords', 'otherwords' => 'OtherWords', 'othercontent' => 'OtherContent', 'other' => 'OtherContent'],
            'issues' => ['id' => 'ID', 'issue' => 'ID', 'issuemonths' => 'IssueMonths', 'description' => 'Description'],
            'invoices' => ['id' => 'id', 'issue' => 'issue_id', 'issue_id' => 'issue_id', 'ad_id' => 'ad_id', 'invoice_number' => 'invoice_number', 'status' => 'status'],
        ];
        $column = $map[$source][$field] ?? $field;
        return $alias . '.`' . $column . '`';
    }
}