// Network integration test hitting a live PrivateBin instance (optional)
// Server under test: https://privatebin.medisoftware.org/
// Enable by setting environment variable PRIVATEBIN_IT=1

#include "privatebinapi.h"
#include "json_parser.h"
#include "http_client.h"
#include <iostream>
#include <string>
#include <vector>
#include <cassert>
#include <fstream>
#include <thread>
#include <chrono>
#include <cstdlib>

static bool extract_paste_id_and_key(const std::string& full_url, std::string& paste_id, std::string& key) {
    // Expected format: https://host/path?PASTEID#BASE58_KEY
    const std::size_t qpos = full_url.find('?');
    const std::size_t hpos = full_url.find('#');
    if (qpos == std::string::npos || hpos == std::string::npos || hpos <= qpos + 1) {
        return false;
    }
    paste_id = full_url.substr(qpos + 1, hpos - (qpos + 1));
    key = full_url.substr(hpos + 1);
    return !paste_id.empty() && !key.empty();
}

int main() {
    // --------------------- Lightweight unit coverage section ---------------------
    {
        std::cout << "[test] unit: JsonParser create/parse roundtrip..." << std::endl;
        std::vector<unsigned char> ct = {'A','B','C'};
        std::vector<unsigned char> tag; // empty optional
        std::vector<unsigned char> iv = {'I','V'};
        std::vector<unsigned char> salt = {'S','A','L','T'};
        auto j = JsonParser::create_paste_json(ct, tag, iv, salt, "5min", "plaintext", false, false);
        std::vector<unsigned char> out_ct, out_tag, out_iv, out_salt;
        std::string out_exp;
        (void)JsonParser::parse_paste_json(j, out_ct, out_tag, out_iv, out_salt, out_exp);
        int status = 0; std::string msg, pid, url, del;
        (void)JsonParser::parse_response(std::string("{\"status\":0,\"id\":\"x\",\"url\":\"u\",\"deletetoken\":\"d\"}"), status, msg, pid, url, del);
    }

    {
        std::cout << "[test] unit: HttpClient GET to example.com..." << std::endl;
        HttpClient c;
        std::string resp;
        (void)c.get("https://example.com/", resp); // ignore success, just exercise code path
    }

    {
        std::cout << "[test] unit: privatebinapi create/get/delete error-paths..." << std::endl;
        const char* server = "https://127.0.0.1:9/"; // closed port to force network error
        const char* content = "unit-test-content";
        char* out_url = nullptr;
        char* del_token = nullptr;
        int rc = create_paste(server, content, nullptr, "5min", "plaintext", 0, 0, &out_url, &del_token);
        (void)rc; // expect non-zero due to network; crypto/JSON path still exercised

        char* out_content = nullptr;
        rc = get_paste(server, "deadbeef", "ABCDEFG", &out_content);
        (void)rc;

        rc = delete_paste(server, "deadbeef", "tok");
        (void)rc;

        if (out_url) free_string(out_url);
        if (del_token) free_string(del_token);
        if (out_content) free_string(out_content);
    }

    // --------------------- Optional integration section ---------------------
    char* it = nullptr;
    size_t len = 0;
    _dupenv_s(&it, &len, "PRIVATEBIN_IT");
    if (!it || std::string(it) == "0") {
        std::cout << "[test] PRIVATEBIN_IT not set; skipping integration test." << std::endl;
        free(it);
        return 0; // success
    }
    
    // Allow overriding server via env, fallback to public test instance
    char* srv = nullptr; size_t srvlen = 0; _dupenv_s(&srv, &srvlen, "PRIVATEBIN_SERVER");
    const char* server = (srv && *srv) ? srv : "https://privatebin.medisoftware.org/";
    const char* password = nullptr; // no password
    const char* expiration = "5min"; // short-lived
    const int burn_after_reading = 0;
    const int open_discussion = 0;

    std::cout << "[test] Testing different text formats..." << std::endl;
    
    // Test 1: Plaintext format
    std::cout << "[test] 1. Testing plaintext format..." << std::endl;
    const char* plaintext_content = "Integration test from lib-privatebin - plaintext";
    const char* plaintext_format = "plaintext";
    
    char* paste_url = nullptr;
    char* delete_token = nullptr;

    int rc = create_paste(server, plaintext_content, password, expiration, plaintext_format,
                          burn_after_reading, open_discussion, &paste_url, &delete_token);
    if (rc != 0 || paste_url == nullptr || delete_token == nullptr) {
        std::cerr << "[test][ERROR] plaintext create_paste failed, rc=" << rc << std::endl;
        if (paste_url) free_string(paste_url);
        if (delete_token) free_string(delete_token);
        return 1;
    }

    std::string full_url = paste_url;
    std::string paste_id;
    std::string key;
    const bool ok_parse = extract_paste_id_and_key(full_url, paste_id, key);
    if (!ok_parse) {
        std::cerr << "[test][ERROR] failed to parse paste id/key from URL: " << full_url << std::endl;
        free_string(paste_url);
        free_string(delete_token);
        return 1;
    }

    std::cout << "[test] get_paste... id=" << paste_id << std::endl;
    char* fetched = nullptr;
    rc = get_paste(server, paste_id.c_str(), key.c_str(), &fetched);
    if (rc != 0 || fetched == nullptr) {
        std::cerr << "[test][ERROR] get_paste failed, rc=" << rc << std::endl;
        free_string(paste_url);
        free_string(delete_token);
        return 1;
    }
    std::string fetched_str = fetched;
    assert(fetched_str == plaintext_content && "fetched plaintext content mismatch");

    std::cout << "[test] delete_paste..." << std::endl;
    rc = delete_paste(server, paste_id.c_str(), delete_token);
    if (rc != 0) {
        std::cerr << "[test][ERROR] delete_paste failed, rc=" << rc << std::endl;
        free_string(paste_url);
        free_string(delete_token);
        free_string(fetched);
        return 1;
    }

    // cleanup plaintext test
    free_string(paste_url);
    free_string(delete_token);
    free_string(fetched);
    
    // Respect server rate limit between submissions
    std::this_thread::sleep_for(std::chrono::seconds(12));

    // Test 2: Syntax highlighting format
    std::cout << "[test] 2. Testing syntax highlighting format..." << std::endl;
    const char* code_content = R"(
#include <iostream>

int main() {
    std::cout << "Hello, World!" << std::endl;
    return 0;
}
)";
    const char* code_format = "syntaxhighlighting";
    
    char* code_paste_url = nullptr;
    char* code_delete_token = nullptr;
    
    rc = create_paste(server, code_content, password, expiration, code_format,
                      burn_after_reading, open_discussion, &code_paste_url, &code_delete_token);
    if (rc != 0 || code_paste_url == nullptr || code_delete_token == nullptr) {
        std::cerr << "[test][ERROR] syntax highlighting create_paste failed, rc=" << rc << std::endl;
        if (code_paste_url) free_string(code_paste_url);
        if (code_delete_token) free_string(code_delete_token);
        return 1;
    }
    
    // Parse code paste URL
    std::string code_full_url = code_paste_url;
    std::string code_paste_id;
    std::string code_key;
    const bool code_ok_parse = extract_paste_id_and_key(code_full_url, code_paste_id, code_key);
    if (!code_ok_parse) {
        std::cerr << "[test][ERROR] failed to parse code paste id/key from URL: " << code_full_url << std::endl;
        free_string(code_paste_url);
        free_string(code_delete_token);
        return 1;
    }
    
    // Fetch and verify code paste
    char* code_fetched = nullptr;
    rc = get_paste(server, code_paste_id.c_str(), code_key.c_str(), &code_fetched);
    if (rc != 0 || code_fetched == nullptr) {
        std::cerr << "[test][ERROR] code get_paste failed, rc=" << rc << std::endl;
        free_string(code_paste_url);
        free_string(code_delete_token);
        return 1;
    }
    std::string code_fetched_str = code_fetched;
    assert(code_fetched_str == code_content && "fetched code content mismatch");
    
    // Delete code paste
    rc = delete_paste(server, code_paste_id.c_str(), code_delete_token);
    if (rc != 0) {
        std::cerr << "[test][ERROR] code delete_paste failed, rc=" << rc << std::endl;
        free_string(code_paste_url);
        free_string(code_delete_token);
        free_string(code_fetched);
        return 1;
    }
    
    // cleanup code test
    free_string(code_paste_url);
    free_string(code_delete_token);
    free_string(code_fetched);
    
    // Pause again before next submission
    std::this_thread::sleep_for(std::chrono::seconds(12));

    // Test 3: Markdown format
    std::cout << "[test] 3. Testing markdown format..." << std::endl;
    const char* markdown_content = R"(
# Test Header

This is a **bold** and *italic* text.

## Code Block
```cpp
int x = 42;
std::cout << x << std::endl;
```

> This is a blockquote.
)";
    const char* markdown_format = "markdown";
    
    char* markdown_paste_url = nullptr;
    char* markdown_delete_token = nullptr;
    
    rc = create_paste(server, markdown_content, password, expiration, markdown_format,
                      burn_after_reading, open_discussion, &markdown_paste_url, &markdown_delete_token);
    if (rc != 0 || markdown_paste_url == nullptr || markdown_delete_token == nullptr) {
        std::cerr << "[test][ERROR] markdown create_paste failed, rc=" << rc << std::endl;
        if (markdown_paste_url) free_string(markdown_paste_url);
        if (markdown_delete_token) free_string(markdown_delete_token);
        return 1;
    }
    
    // Parse markdown paste URL
    std::string markdown_full_url = markdown_paste_url;
    std::string markdown_paste_id;
    std::string markdown_key;
    const bool markdown_ok_parse = extract_paste_id_and_key(markdown_full_url, markdown_paste_id, markdown_key);
    if (!markdown_ok_parse) {
        std::cerr << "[test][ERROR] failed to parse markdown paste id/key from URL: " << markdown_full_url << std::endl;
        free_string(markdown_paste_url);
        free_string(markdown_delete_token);
        return 1;
    }
    
    // Fetch and verify markdown paste
    char* markdown_fetched = nullptr;
    rc = get_paste(server, markdown_paste_id.c_str(), markdown_key.c_str(), &markdown_fetched);
    if (rc != 0 || markdown_fetched == nullptr) {
        std::cerr << "[test][ERROR] markdown get_paste failed, rc=" << rc << std::endl;
        free_string(markdown_paste_url);
        free_string(markdown_delete_token);
        return 1;
    }
    std::string markdown_fetched_str = markdown_fetched;
    assert(markdown_fetched_str == markdown_content && "fetched markdown content mismatch");
    
    // Delete markdown paste
    rc = delete_paste(server, markdown_paste_id.c_str(), markdown_delete_token);
    if (rc != 0) {
        std::cerr << "[test][ERROR] markdown delete_paste failed, rc=" << rc << std::endl;
        free_string(markdown_paste_url);
        free_string(markdown_delete_token);
        free_string(markdown_fetched);
        return 1;
    }
    
    // cleanup markdown test
    free_string(markdown_paste_url);
    free_string(markdown_delete_token);
    free_string(markdown_fetched);

    // Pause again before next submission
    std::this_thread::sleep_for(std::chrono::seconds(12));

    // Test 4: File upload via API
    {
        std::cout << "[test] 4. Testing file upload..." << std::endl;
        // Create temporary file
        const char* tmpName = "test_upload_tmp.txt";
        {
            std::ofstream ofs(tmpName, std::ios::binary);
            ofs << "File-Upload via privatebinapi test\n0123456789";
        }

        char* fu_url = nullptr;
        char* fu_del = nullptr;
        int frc = upload_file(server, tmpName, nullptr, "5min", 0, 0, &fu_url, &fu_del);
        if (frc != 0 || !fu_url || !fu_del) {
            std::cerr << "[test][ERROR] upload_file failed, rc=" << frc << std::endl;
            if (fu_url) free_string(fu_url);
            if (fu_del) free_string(fu_del);
            if (srv) free(srv);
            free(it);
            return 1;
        }

        std::string full_url2 = fu_url;
        std::string paste_id2; std::string key2;
        const bool ok2 = extract_paste_id_and_key(full_url2, paste_id2, key2);
        if (!ok2) {
            std::cerr << "[test][ERROR] failed to parse file paste id/key from URL: " << full_url2 << std::endl;
            free_string(fu_url);
            free_string(fu_del);
            if (srv) free(srv);
            free(it);
            return 1;
        }

        char* fetched2 = nullptr;
        frc = get_paste(server, paste_id2.c_str(), key2.c_str(), &fetched2);
        if (frc != 0 || !fetched2) {
            std::cerr << "[test][ERROR] get_paste (file) failed, rc=" << frc << std::endl;
            free_string(fu_url);
            free_string(fu_del);
            if (srv) free(srv);
            free(it);
            return 1;
        }
        std::string fetched2_str = fetched2;
        // Basic content check
        if (fetched2_str.find("File-Upload via privatebinapi test") == std::string::npos) {
            std::cerr << "[test][ERROR] fetched file content mismatch" << std::endl;
            free_string(fu_url);
            free_string(fu_del);
            free_string(fetched2);
            if (srv) free(srv);
            free(it);
            return 1;
        }

        // Cleanup on server
        frc = delete_paste(server, paste_id2.c_str(), fu_del);
        if (frc != 0) {
            std::cerr << "[test][WARN] delete_paste(file) returned rc=" << frc << std::endl;
        }

        free_string(fu_url);
        free_string(fu_del);
        free_string(fetched2);
        // Remove local tmp
        std::remove(tmpName);
    }

    std::cout << "[test] All format & file tests passed successfully!" << std::endl;
    if (srv) free(srv);
    return 0;
}