import axios from 'axios';
import toast from 'react-hot-toast';

// Bazowy URL to backend
export const apiClient = axios.create({
  baseURL: import.meta.env.VITE_API_URL
    ? import.meta.env.VITE_API_URL.replace('/api', '')
    : import.meta.env.VITE_LANGSERVE_URL
      ? import.meta.env.VITE_LANGSERVE_URL.replace('/api', '')
      : 'http://localhost:8000',
  headers: { 'Content-Type': 'application/json' },
});

// --- Interceptory ---

// Request: automatyczne wstrzykiwanie tokena Clerk
apiClient.interceptors.request.use((config) => {
  const token = localStorage.getItem('token');
  if (token && !config.headers['Authorization']) {
    config.headers['Authorization'] = `Bearer ${token}`;
  }
  return config;
});

// Response: obsługa błędów globalnych
apiClient.interceptors.response.use(
  (response) => response,
  (error) => {
    const status = error?.response?.status;
    if (status === 429) {
      const retryAfter = error.response?.data?.retry_after;
      const msg = retryAfter
        ? `Przekroczono limit zapytań. Spróbuj za ${retryAfter}s.`
        : 'Przekroczono limit zapytań. Poczekaj chwilę.';
      toast.error(`⏳ ${msg}`, { duration: 8000, id: 'rate-limit' });
    }
    return Promise.reject(error);
  }
);

export const getSubscriptionStatus = async () => {
  // /api/me zwraca {tier, wizard_iterations_today, tokens_used_month, limits}
  const { data } = await apiClient.get('/api/me');
  return data;
};

export const getMe = getSubscriptionStatus;

export const deleteUserAccount = async () => {
  const { data } = await apiClient.delete('/api/account');
  return data;
};

export const getAccountExport = async () => {
  const { data } = await apiClient.get('/api/account/export');
  return data;
};

export const updateAccountSettings = async (settings: { gdpr_consent_accepted?: boolean; ai_disclaimer_enabled?: boolean }) => {
  const { data } = await apiClient.post('/api/account/settings', settings);
  return data;
};

export const submitFeedback = async (text: string, type: string = "feedback") => {
  const { data } = await apiClient.post('/api/feedback', { text, type });
  return data;
};

export const lookupCompany = async (nip: string) => {
  const { data } = await apiClient.get(`/api/projects/lookup-company?nip=${nip}`);
  return data;
};

export const getAdminStats = async () => {
  const { data } = await apiClient.get('/api/admin/stats');
  return data;
};


export const getCurrentSession = async () => {
    // Stub w fazie bez połączenia pełnego PostgresSaver w backendzie
    const { data } = await apiClient.get('/api/session/current').catch(() => ({ data: {
        thread_id: "test-thread-123",
        status: "wizard",
        agent: "wizard",
        critic_evaluation: { is_approved: false, feedback: "Brak sekcji z oceną ryzyka ekologicznego." },
        tokens_used: 1250,
        active_step: 3
    } }));
    return data;
};

// Projects API

export const getProjects = async () => {
    const { data } = await apiClient.get('/api/projects');
    return data;
};

export const getProject = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}`);
    return data;
};

export const updateProject = async (projectId: string, updateData: any) => {
    const { data } = await apiClient.put(`/api/projects/${projectId}`, updateData);
    return data;
};

export const deleteProject = async (projectId: string) => {
    await apiClient.delete(`/api/projects/${projectId}`);
};

export const createProject = async (projectData: { title: string; program_type: string; description?: string; program_name?: string; estimated_value?: number; external_context?: Record<string, any> }) => {
    const { data } = await apiClient.post('/api/projects', projectData);
    return data;
};



export const matchProgram = async (description: string, nip?: string) => {
    const { data } = await apiClient.post('/api/projects/match-program', {
        description: description,
        nip: nip
    });
    return data;
};

export const createWelcomeSeed = async () => {
    const { data } = await apiClient.post('/api/projects/welcome-seed');
    return data;
};

// --- SECTION ENDPOINTS ---

export const getProjectSections = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/sections`);
    return data;
};

export const generateProjectSection = async (projectId: string, sectionType: string, promptContext?: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/generate-section`, {
        section_type: sectionType,
        prompt_context: promptContext
    });
    return data;
};

// --- Q&A / VERIFIER ENDPOINTS ---

export const getProjectQuestionsHistory = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/ask/history`);
    return data;
};

export const askProjectQuestion = async (projectId: string, question: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/ask`, { question });
    return data;
};

export const clearProjectQuestionsHistory = async (projectId: string) => {
    const { data } = await apiClient.delete(`/api/projects/${projectId}/ask/history`);
    return data;
};

export const updateProjectSection = async (projectId: string, sectionId: string, content: string) => {
    const { data } = await apiClient.put(`/api/projects/${projectId}/sections/${sectionId}`, {
        content: content
    });
    return data;
};

export const reviewProjectSection = async (projectId: string, sectionType: string, content: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/review-section`, {
        section_type: sectionType,
        content: content
    });
    return data;
};

export interface SectionVersion {
    id: string;
    old_content: string;
    author: string;
    summary: string | null;
    timestamp: string;
}

export const getSectionVersions = async (projectId: string, sectionId: string): Promise<SectionVersion[]> => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/sections/${sectionId}/versions`);
    return data;
};

export const restoreSectionVersion = async (projectId: string, sectionId: string, versionId: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/sections/${sectionId}/versions/${versionId}/restore`);
    return data;
};


export const previewProject = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/preview`);
    return data;
};

export const compileFinalDocument = async (projectId: string, approvedOnly: boolean = false) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/compile-final`, {
        approved_only: approvedOnly
    });
    return data;
};

export const auditFinalDocument = async (projectId: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/global-audit`);
    return data;
};

export const clearGlobalAudit = async (projectId: string) => {
    // Czyści wynik audytu przez zapis pustego stanu (backend nie ma DELETE /audit -
    // resetujemy przez POST z flagą) – fallback do PATCH
    try {
        const { data } = await apiClient.delete(`/api/projects/${projectId}/global-audit`);
        return data;
    } catch {
        // Backend może nie mieć DELETE — wrócimy z sukcesem, audit zostanie nadpisany przy kolejnym uruchomieniu
        return { status: 'cleared' };
    }
};

export const autofixProjectSection = async (projectId: string, sectionId: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/sections/${sectionId}/autofix`);
    return data;
};

export const syncRAGKnowledge = async () => {
    const { data } = await apiClient.post('/api/rag/sync', { category: "ALL" });
    return data;
};

// --- CHATBOT PROJECT ENDPOINTS ---

export const getProjectChatHistory = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/chat`);
    return data;
};

export const clearProjectChatHistory = async (projectId: string) => {
    const { data } = await apiClient.delete(`/api/projects/${projectId}/chat`);
    return data;
};

export const sendProjectChatMessage = async (projectId: string, content: string, activeSectionId?: string, activeSectionTitle?: string) => {
    const payload: any = { content };
    if (activeSectionId) {
        payload.active_section = activeSectionId;
        if (activeSectionTitle) payload.active_section_title = activeSectionTitle;
    }
    const { data } = await apiClient.post(`/api/projects/${projectId}/chat`, payload);
    return data;
};

// --- EXPORT ENDPOINT ---
export const exportProjectDocument = async (projectId: string, format: string, template: string) => {
    // Return the response so we can extract blob
    return await apiClient.post(`/api/projects/${projectId}/export`, {
        format,
        template
    }, {
        responseType: 'blob' // Ważne, żeby Axios traktował to jako strumień binarny
    });
};


export const getProjectVersions = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/versions`);
    return data;
};

export const createProjectVersion = async (projectId: string, title?: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/versions`, { title });
    return data;
};

export const exportProjectPDF = async (projectId: string, versionId?: string) => {
    const payload: any = { format: 'pdf', template: 'standard' };
    if (versionId) payload.version_id = versionId;

    const response = await apiClient.post(`/api/projects/${projectId}/export`, payload, { responseType: 'blob' });
    const url = window.URL.createObjectURL(new Blob([response.data]));
    const link = document.createElement('a');
    link.href = url;
    link.setAttribute('download', versionId ? `dotacja_v${versionId.substring(0, 6)}.pdf` : `dotacja_${projectId}.pdf`);
    document.body.appendChild(link);
    link.click();
    link.remove();
};

export const exportProjectDOCX = async (projectId: string, approvedOnly: boolean = false, versionId?: string) => {
    const payload: any = { format: 'docx', template: 'standard' };
    if (versionId) payload.version_id = versionId;

    const response = await apiClient.post(`/api/projects/${projectId}/export`, payload, { responseType: 'blob' });
    const url = window.URL.createObjectURL(new Blob([response.data]));
    const link = document.createElement('a');
    link.href = url;
    link.setAttribute('download', versionId ? `dotacja_v${versionId.substring(0, 6)}.docx` : `dotacja_${projectId}.docx`);
    document.body.appendChild(link);
    link.click();
    link.remove();
};

// --- EXTERNAL KNOWLEDGE / DOCUMENTS ENDPOINTS ---

export const uploadProjectDocument = async (projectId: string, file: File) => {
    const formData = new FormData();
    formData.append('file', file);
    const { data } = await apiClient.post(`/api/projects/${projectId}/documents`, formData, {
        headers: {
            'Content-Type': 'multipart/form-data'
        }
    });
    return data;
};

export const getProjectDocuments = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/documents`);
    return data;
};

export const deleteProjectDocument = async (projectId: string, filename: string) => {
    const { data } = await apiClient.delete(`/api/projects/${projectId}/documents/${filename}`);
    return data;
};

// --- AUDIT ENDPOINTS ---

export const getProjectAudit = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}`);
    return data.final_document_audit_result;
};

export const runProjectAudit = async (projectId: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/global-audit`);
    return data;
};

export const getHolisticReview = async (projectId: string) => {
    const { data } = await apiClient.get(`/api/projects/${projectId}/holistic-review`);
    return data;
};

export const runHolisticReview = async (projectId: string) => {
    const { data } = await apiClient.post(`/api/projects/${projectId}/holistic-review`);
    return data;
};

// --- GRANTS / NABORY ENDPOINTS ---

export const getGrantNabory = async (forceRefresh = false) => {
    const { data } = await apiClient.get('/api/grants/nabory', {
        params: { force_refresh: forceRefresh },
    });
    return data as { status: string; count: number; nabory: any[] };
};

export interface UserAnswer {
    question: string;
    answer: string;
}

export const matchGrantsForProject = async (projectId: string, userAnswers: UserAnswer[] = []) => {
    const { data } = await apiClient.post('/api/grants/match', {
        project_id: projectId,
        user_answers: userAnswers
    });
    return data as { status: string; project_id: string; needs_more_info: boolean; clarifying_questions: string[]; matches: any[] };
};

// --- HEALTH ---

export const getApiHealth = async () => {
    const { data } = await apiClient.get('/api/health');
    return data;
};