import type { ProfileAccess } from '@/types/profile-access';
import type { OpportunityManagementAccess } from '@/types/opportunity-management';

export type PortalNavItem = {
    id: string;
    label: string;
    href?: string;
    children?: PortalNavItem[];
};
export type PortalNavAccess = {
    contentManagementHref?: string | null;
    contentManagementAccess?: {
        opportunities?: { index: string; create?: string | null };
    };
    scopedAdministration?: { label: string; href: string }[];
    procurement?: boolean;
    funding?: boolean;
    authenticated: boolean;
    manager: boolean;
    businesses?: boolean;
    businessReviewUrl?: string | null;
    education?: boolean;
    ai?: boolean;
    legacyContent?: boolean;
    profileAccess?: ProfileAccess | null;
    opportunityManagement?: OpportunityManagementAccess | null;
    context?: {
        id: string;
        simulator?: string | null;
        land?: string | null;
        desk?: string | null;
        guidance?: string | null;
    };
};
const link = (id: string, label: string, href: string): PortalNavItem => ({
    id,
    label,
    href,
});
/** Display the existing server decision; a generic manager flag cannot override a scoped denial. */
export function canShowLegacyManagement(auth?: {
    user?: unknown;
    canManagePortal?: boolean;
    legacyManagementAccess?: boolean;
}): boolean {
    return (
        !!auth?.user &&
        (auth.legacyManagementAccess ?? auth.canManagePortal ?? false)
    );
}

/** One route catalogue for the public shell and authenticated pages. */
export function legacyPortalNavigation(
    access: PortalNavAccess,
): PortalNavItem[] {
    const opportunities = access.manager ? access.opportunityManagement : null;
    const groups: PortalNavItem[] = [
        {
            id: 'explore',
            label: 'Explorar investimentos',
            children: [
                link('opportunities', 'Oportunidades', '/oportunidades'),
                link('sectors', 'Sectores', '/sectores'),
                ...(access.legacyContent
                    ? [
                          link(
                              'legacy-agronegocio',
                              'Explorar agronegócio',
                              '/explorar/agronegocio',
                          ),
                      ]
                    : []),
                {
                    id: 'structures',
                    label: 'Carteira e estruturas',
                    children: [
                        link(
                            'portfolio',
                            'Carteira de investimento',
                            '/carteira',
                        ),
                        link(
                            'projects',
                            'Projectos âncora',
                            '/carteira?kind=project',
                        ),
                        link('clusters', 'Clusters', '/carteira?kind=cluster'),
                        link(
                            'corridors',
                            'Corredores',
                            '/carteira?kind=corridor',
                        ),
                    ],
                },
                {
                    id: 'zones',
                    label: 'Zonas e parques',
                    children: [
                        link('all-zones', 'Todas as zonas', '/zonas'),
                        link('zee', 'ZEE', '/zonas?category=zee'),
                        link('zfi', 'ZFI', '/zonas?category=zfi'),
                        link(
                            'parks',
                            'Parques industriais',
                            '/zonas?physical_category=industrial_park',
                        ),
                    ],
                },
            ],
        },
        {
            id: 'prepare',
            label: 'Preparar o projecto',
            children: [
                link('roadmap', 'Como investir', '/como-investir'),
                link('dossier', 'Preparar dossier', '/simulador-fiscal'),
                link('simulator', 'Simulador', '/simulador-fiscal'),
                link('land', 'Terra e DUAT', '/terra-duat'),
                ...(access.education
                    ? [
                          link(
                              'education',
                              'Educação e competências',
                              '/educacao',
                          ),
                      ]
                    : []),
            ],
        },
        {
            id: 'support',
            label: 'Serviços e apoio',
            children: [
                link('desk', 'Balcão Virtual', '/balcao-virtual'),
                link(
                    'help',
                    'Apoio ao investidor',
                    access.context?.guidance || '/apoio',
                ),
                link('documents', 'Documentos e formulários', '/documentos'),
                link('law', 'Legislação', '/legislacao'),
            ],
        },
        {
            id: 'partnerships',
            label: 'Parcerias',
            children: [
                link('exchange', 'Bolsa de Parcerias', '/parcerias'),
                link('businesses', 'Negócios e participações', '/negocios'),
                ...(access.authenticated
                    ? [
                          link(
                              'my-partnerships',
                              'As minhas parcerias',
                              '/parcerias/painel',
                          ),
                      ]
                    : []),
                ...(access.authenticated && access.businesses
                    ? [
                          link(
                              'my-businesses',
                              'Os meus negócios',
                              '/investidor/negocios',
                          ),
                      ]
                    : []),
                ...(access.authenticated &&
                access.businesses &&
                access.businessReviewUrl
                    ? [
                          link(
                              'review-businesses',
                              'Revisão de negócios',
                              access.businessReviewUrl,
                          ),
                      ]
                    : []),
            ],
        },
        {
            id: 'account',
            label: 'A minha área',
            children: access.authenticated
                ? [
                      link(
                          'dashboard',
                          opportunities
                              ? 'Painel da gestão'
                              : 'Dossiers e percursos',
                          opportunities ? '/dashboard' : '/investidor',
                      ),
                      link(
                          'profile',
                          'Perfil e empresas',
                          '/investidor/profile',
                      ),
                      link('dossiers', 'Dossiers e percursos', '/investidor'),
                      link(
                          'requests',
                          'Pedidos e tarefas de acompanhamento',
                          '/balcao-virtual',
                      ),
                      link(
                          'interests',
                          'Manifestações e favoritos',
                          '/investidor/manifestacoes',
                      ),
                      link(
                          'notifications',
                          'Notificações',
                          '/investidor/notifications',
                      ),
                  ]
                : [
                      link('login', 'Entrar', '/login'),
                      link('register', 'Criar conta', '/register'),
                  ],
        },
    ];
    if (access.manager)
        groups.push({
            id: 'management',
            label: 'Gestão',
            children: [
                link(
                    'manage-interests',
                    'Pedidos de interesse',
                    '/management/interests',
                ),
                link('crm', 'CRM interno', '/management/crm/leads'),
                ...(opportunities
                    ? [
                          link(
                              'manage-opportunities',
                              opportunities.manage.label,
                              opportunities.manage.href,
                          ),
                          ...(opportunities.installed
                              ? [
                                    link(
                                        'create-opportunity',
                                        opportunities.create.label,
                                        opportunities.create.href,
                                    ),
                                ]
                              : []),
                      ]
                    : []),
                {
                    id: 'manage-catalogue',
                    label: 'Catálogo de investimento',
                    children: [
                        link(
                            'manage-sectors',
                            'Sectores',
                            '/management/sectors',
                        ),
                        ...(!opportunities
                            ? [
                                  link(
                                      'manage-opportunities',
                                      'Oportunidades',
                                      '/management/opportunities',
                                  ),
                              ]
                            : []),
                        link(
                            'manage-projects',
                            'Projectos',
                            '/management/projects',
                        ),
                        link(
                            'manage-clusters',
                            'Clusters',
                            '/management/clusters',
                        ),
                    ],
                },
                link(
                    'manage-portfolio',
                    'Carteira e estruturas',
                    '/management/portfolio',
                ),
                link(
                    'manage-documents',
                    'Acervo documental',
                    '/management/portal-services',
                ),
                link(
                    'manage-zones',
                    'Zonas e parques',
                    '/management/investment/zones',
                ),
                link(
                    'manage-territory',
                    'Associações territoriais',
                    '/management/territory-associations',
                ),
                link(
                    'manage-references',
                    'Referências e formulários',
                    '/management/investment/references',
                ),
                link(
                    'desk-installation',
                    'Estado do Balcão e orientação',
                    '/management/balcao-install',
                ),
                link(
                    'exchange-installation',
                    'Estado da Bolsa de Parcerias',
                    '/management/partnerships-install',
                ),
                ...(access.ai
                    ? [
                          link(
                              'manage-ai',
                              'Assistência interna',
                              '/management/ai',
                          ),
                      ]
                    : []),
                ...(access.education
                    ? [
                          link(
                              'manage-education',
                              'Educação e competências',
                              '/management/education',
                          ),
                      ]
                    : []),
            ],
        });
    if (access.authenticated && access.profileAccess) {
        const profile = access.profileAccess;
        groups.push({
            id: 'profile-opportunities',
            label: 'Perfil e oportunidades',
            children: [
                ...(profile.mine
                    ? [
                          link(
                              'my-opportunities',
                              'Minhas oportunidades',
                              profile.mine,
                          ),
                      ]
                    : []),
                ...(profile.create
                    ? [
                          link(
                              'new-my-opportunity',
                              'Nova oportunidade',
                              profile.create,
                          ),
                      ]
                    : []),
                link(
                    'promoter-profile',
                    profile.mine
                        ? 'Autorizações de Promotor'
                        : 'Solicitar perfil de Promotor',
                    profile.request,
                ),
                ...(!profile.mine && profile.review
                    ? [
                          link(
                              'profile-review',
                              'Revisão de oportunidades',
                              profile.review,
                          ),
                      ]
                    : []),
                ...(profile.audit
                    ? [
                          link(
                              'profile-audit',
                              'Auditoria de acessos',
                              profile.audit,
                          ),
                      ]
                    : []),
                ...(profile.administration
                    ? [
                          link(
                              'profile-administration',
                              'Gestão de perfis',
                              profile.administration,
                          ),
                          link(
                              'profile-installation',
                              'Instalação dos perfis 040000',
                              '/management/profile-install',
                          ),
                      ]
                    : []),
            ],
        });
    }
    return groups;
}

export function currentNavigationGroup(
    groups: PortalNavItem[],
    url: string,
): string | null {
    const current = new URL(url, 'https://portal.invalid');
    let match: { group: string; score: number } | null = null;
    const visit = (items: PortalNavItem[], group: string) =>
        items.forEach((item) => {
            if (item.children) visit(item.children, group);
            if (!item.href) return;
            const target = new URL(item.href, current.origin);
            if (target.hash && target.hash !== current.hash) return;
            if (
                current.pathname !== target.pathname &&
                !current.pathname.startsWith(target.pathname + '/')
            )
                return;
            for (const [key, value] of target.searchParams)
                if (current.searchParams.get(key) !== value) return;
            const score =
                target.pathname.length + target.searchParams.size * 100;
            if (!match || score > match.score) match = { group, score };
        });
    for (const group of groups) visit(group.children ?? [], group.id);
    return (match as { group: string; score: number } | null)?.group ?? null;
}

/** Select one destination, preferring a matching catalogue filter. */
export function currentNavigationItem(
    groups: PortalNavItem[],
    url: string,
): string | null {
    const current = new URL(url, 'https://portal.invalid');
    const best = { id: null as string | null, score: -1 };
    const visit = (items: PortalNavItem[]) => {
        for (const item of items) {
            if (item.children) visit(item.children);
            if (!item.href) continue;
            const target = new URL(item.href, current.origin);
            if (target.hash && target.hash !== current.hash) continue;
            if (current.pathname !== target.pathname) continue;
            if (
                [...target.searchParams].some(
                    ([key, value]) => current.searchParams.get(key) !== value,
                )
            )
                continue;
            const score = target.searchParams.size;
            if (score > best.score) {
                best.id = item.id;
                best.score = score;
            }
        }
    };
    for (const group of groups) visit(group.children ?? []);
    return best.id;
}

/** Investor organization; existing capability filters still determine private destinations. */
export function portalNavigation(access: PortalNavAccess): PortalNavItem[] {
    const previous = legacyPortalNavigation({
        ...access,
        manager: access.authenticated && access.manager,
        profileAccess: access.authenticated ? access.profileAccess : null,
    });
    const workHub = access.authenticated ? access.contentManagementHref : null;
    const workOpportunities = access.authenticated
        ? access.contentManagementAccess?.opportunities
        : undefined;
    const workCreate = access.authenticated
        ? access.profileAccess?.create ||
          workOpportunities?.create ||
          (access.manager && access.opportunityManagement?.installed
              ? access.opportunityManagement.create.href
              : null)
        : null;
    return uniqueNavigationDestinations([
        ...(access.procurement
            ? [
                  {
                      id: 'procurement-area',
                      label: 'Concursos e anúncios',
                      children: [
                          link(
                              'procurement',
                              'Consultar concursos e anúncios',
                              '/concursos',
                          ),
                          ...(access.authenticated
                              ? [
                                    link(
                                        'procurement-watched',
                                        'Os concursos que acompanho',
                                        '/concursos/acompanhar',
                                    ),
                                ]
                              : []),
                      ],
                  },
              ]
            : []),
        {
            id: 'discovery',
            label: 'Descoberta',
            children: [
                link('locations', 'Localizações', '/oportunidades?view=map'),
                ...(access.funding
                    ? [
                          link(
                              'funding',
                              'Fundos e programas de apoio',
                              '/fundos',
                          ),
                          ...(access.authenticated
                              ? [
                                    link(
                                        'funding-saved',
                                        'Programas que guardei',
                                        '/fundos/guardados',
                                    ),
                                ]
                              : []),
                      ]
                    : []),
                {
                    id: 'related-catalogues',
                    label: 'Catálogos relacionados',
                    children: [
                        link(
                            'portfolio',
                            'Carteira, clusters e corredores',
                            '/carteira',
                        ),
                        link('zones', 'Zonas e parques', '/zonas'),
                        ...(access.businesses
                            ? [
                                  link(
                                      'business-catalogue',
                                      'Negócios',
                                      '/negocios',
                                  ),
                              ]
                            : []),
                        ...(access.education
                            ? [
                                  link(
                                      'education-catalogue',
                                      'Oportunidades na educação',
                                      '/educacao',
                                  ),
                              ]
                            : []),
                    ],
                },
            ],
        },
        {
            id: 'realization',
            label: 'Realização',
            children: [
                link('start', 'Iniciar investimento', '/investimentos/iniciar'),
                link(
                    'licensing',
                    'Licenciamento',
                    access.context
                        ? `/investimentos/${access.context.id}#S08`
                        : '/investimentos/iniciar?step=S08',
                ),
                link(
                    'land',
                    'Acesso à terra',
                    access.context?.land || '/terra-duat',
                ),
            ],
        },
        {
            id: 'support',
            label: 'Suporte',
            children: [
                link('documents', 'Biblioteca de documentos', '/documentos'),
                link('legislation', 'Legislação', '/legislacao'),
                link(
                    'services',
                    'Serviços ao investidor',
                    access.context?.desk || '/balcao-virtual',
                ),
                link(
                    'followup',
                    'Acompanhamento do projecto',
                    access.context
                        ? `/investimentos/${access.context.id}`
                        : '/investimentos',
                ),
                link(
                    'help',
                    'Apoio ao investidor',
                    access.context?.guidance || '/apoio',
                ),
            ],
        },

        {
            id: 'work',
            label: 'Área de trabalho',
            children: [
                link(
                    'work-entry',
                    workHub
                        ? 'Gestão de conteúdos e oportunidades'
                        : 'Acesso à gestão',
                    workHub || '/acesso-gestao',
                ),
                ...(workCreate
                    ? [
                          link(
                              'prepare-analysis',
                              'Preparar análise e ideia',
                              workCreate + '?analysis=proactive',
                          ),
                      ]
                    : []),
                ...(workOpportunities
                    ? [
                          link(
                              'work-opportunities',
                              'Oportunidades em preparação',
                              workOpportunities.index,
                          ),
                      ]
                    : []),
                ...previous
                    .filter((group) =>
                        ['management', 'profile-opportunities'].includes(
                            group.id,
                        ),
                    )
                    .flatMap((group) => group.children ?? []),
                ...(access.authenticated && access.scopedAdministration?.length
                    ? [
                          {
                              id: 'work-administration',
                              label: 'Administração',
                              children: access.scopedAdministration.map(
                                  (item, index) =>
                                      link(
                                          'scoped-' + index,
                                          item.label,
                                          item.href,
                                      ),
                              ),
                          },
                      ]
                    : []),
            ],
        },
        ...previous.filter((group) => group.id === 'account'),
        ...(access.authenticated &&
        access.businesses &&
        access.businessReviewUrl
            ? [
                  {
                      id: 'business-work',
                      label: 'Revisão de negócios',
                      children: [
                          link(
                              'review-businesses',
                              'Revisão de negócios',
                              access.businessReviewUrl,
                          ),
                      ],
                  },
              ]
            : []),
        ...(access.authenticated
            ? [
                  {
                      id: 'personal-activity',
                      label: 'A minha atividade',
                      children: [
                          link(
                              'my-partnerships',
                              'As minhas parcerias',
                              '/parcerias/painel',
                          ),
                          ...(access.businesses
                              ? [
                                    link(
                                        'my-businesses',
                                        'Os meus negócios',
                                        '/investidor/negocios',
                                    ),
                                ]
                              : []),
                      ],
                  },
              ]
            : []),
    ]);
}

/** One menu entry per exact destination; filters and anchors retain their meaning. */
export function uniqueNavigationDestinations(
    groups: PortalNavItem[],
): PortalNavItem[] {
    const seen = new Set<string>();
    const visit = (items: PortalNavItem[]): PortalNavItem[] =>
        items.flatMap((item) => {
            const children = item.children ? visit(item.children) : undefined;
            if (children && !children.length && !item.href) return [];
            if (item.href) {
                const url = new URL(item.href, 'https://portal.invalid');
                url.searchParams.sort();
                const identity = url.href;
                if (seen.has(identity)) return [];
                seen.add(identity);
            }
            return [{ ...item, ...(children ? { children } : {}) }];
        });
    return visit(groups);
}