"""
tiktok.py  –  TikTok scraper using Selenium.
Exports: scrape_tiktok(cookie_str, target_username) -> list[dict]

Returns structured data per-video:
  url, profile_username, upload_date, like_count,
  caption_short, caption_detail, comments, scrape_date

cookie_str accepts:
  1. Raw string: "sessionid=xxx; tt_webid=yyy; ..."
  2. JSON array:  [{"name":"sessionid","value":"xxx",...}, ...]
  3. JSON object: {"sessionid": "xxx", "tt_webid": "yyy"}
"""
from __future__ import annotations

import json
import time
from datetime import datetime

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException, NoSuchElementException

from ._driver import _create_driver


# ── Cookie injection ───────────────────────────────────────────────────────────

def _inject_cookies(driver, cookie_str: str) -> bool:
    driver.get("https://www.tiktok.com/")
    time.sleep(3)

    if not cookie_str or not cookie_str.strip():
        print("[TikTok] Tidak ada cookie yang diberikan.")
        return False

    stripped = cookie_str.strip()

    if stripped.startswith("["):
        try:
            cookies = json.loads(stripped)
            count = 0
            for c in cookies:
                if not isinstance(c, dict) or "name" not in c:
                    continue
                safe = {k: c[k] for k in ("name", "value", "domain", "path", "secure", "httpOnly", "expiry") if k in c}
                safe.setdefault("domain", ".tiktok.com")
                try:
                    driver.add_cookie(safe)
                    count += 1
                except Exception:
                    safe.pop("domain", None)
                    try:
                        driver.add_cookie(safe)
                        count += 1
                    except Exception:
                        pass
            driver.refresh()
            time.sleep(3)
            return count > 0
        except Exception as e:
            print(f"[TikTok] JSON array error: {e}")

    if stripped.startswith("{"):
        try:
            obj = json.loads(stripped)
            count = 0
            for name, value in obj.items():
                try:
                    driver.add_cookie({"name": str(name), "value": str(value), "domain": ".tiktok.com"})
                    count += 1
                except Exception:
                    pass
            driver.refresh()
            time.sleep(3)
            return count > 0
        except Exception as e:
            print(f"[TikTok] JSON object error: {e}")

    try:
        count = 0
        for item in stripped.split(";"):
            item = item.strip()
            if "=" not in item:
                continue
            name, _, value = item.partition("=")
            try:
                driver.add_cookie({"name": name.strip(), "value": value.strip(), "domain": ".tiktok.com"})
                count += 1
            except Exception:
                pass
        driver.refresh()
        time.sleep(3)
        return count > 0
    except Exception as e:
        print(f"[TikTok] String cookie error: {e}")
        return False


# ── Scraping helpers ───────────────────────────────────────────────────────────

_VIDEO_LINK_SELECTORS = [
    'div[data-e2e="user-post-item"] a',
    'div[data-e2e="user-post-item-list"] a',
    'a[href*="/video/"]',
    'div[class*="DivItemContainerV2"] a',
    'div[class*="DivWrapper"] a[href*="/video/"]',
]


def _get_video_links(driver, profile_url: str, max_videos: int = 30) -> list:
    print(f"[TikTok] Membuka profil: {profile_url}")
    driver.get(profile_url)

    loaded = False
    for sel in _VIDEO_LINK_SELECTORS:
        try:
            WebDriverWait(driver, 15).until(EC.presence_of_element_located((By.CSS_SELECTOR, sel)))
            loaded = True
            break
        except TimeoutException:
            continue

    if not loaded:
        time.sleep(5)

    links: set = set()
    stall = 0

    while len(links) < max_videos:
        prev = len(links)
        for sel in _VIDEO_LINK_SELECTORS:
            for el in driver.find_elements(By.CSS_SELECTOR, sel):
                href = el.get_attribute("href")
                if href and "/video/" in href:
                    links.add(href.split("?")[0])
        if len(links) >= max_videos:
            break
        driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
        time.sleep(3)
        if len(links) == prev:
            stall += 1
            if stall >= 3:
                break
        else:
            stall = 0

    return list(links)[:max_videos]


def _scrape_video(driver, video_url: str, profile_username: str) -> dict | None:
    print(f"[TikTok] Memproses: {video_url}")
    driver.get(video_url)
    time.sleep(5)

    video_data = {
        "url": video_url,
        "profile_username": profile_username,
        "upload_date": "N/A",
        "like_count": "N/A",
        "caption_short": "",
        "caption_detail": "",
        "comments": [],
        "scrape_date": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
    }

    try:
        date_el = WebDriverWait(driver, 8).until(
            EC.presence_of_element_located((By.CSS_SELECTOR, 'span[data-e2e="browser-video-meta-date"]'))
        )
        video_data["upload_date"] = date_el.text.strip()
    except TimeoutException:
        pass

    try:
        like_el = driver.find_element(By.CSS_SELECTOR, 'strong[data-e2e="like-count"]')
        video_data["like_count"] = like_el.text.strip()
    except NoSuchElementException:
        pass

    try:
        desc_container = WebDriverWait(driver, 5).until(
            EC.presence_of_element_located((By.CSS_SELECTOR, "div[data-e2e='browse-video-desc']"))
        )
        try:
            cap_el = desc_container.find_element(By.CSS_SELECTOR, 'span[data-e2e="new-desc-span"]')
            video_data["caption_short"] = cap_el.text.strip()
            
            try:
                more_btn = driver.find_element(By.CSS_SELECTOR, "span[class*='-SpanExpandIcon']")
                driver.execute_script("arguments[0].click();", more_btn)
                time.sleep(2)
                detail_container = WebDriverWait(driver, 5).until(
                    EC.presence_of_element_located((By.CSS_SELECTOR, "div[class*='DivCustomTDKContainer']"))
                )
                desc_text = ""
                try:
                    desc_text = detail_container.find_element(By.CSS_SELECTOR, "div[data-e2e='v2t-desc']").text
                except NoSuchElementException:
                    pass
                kw_text = ""
                try:
                    kw_text = detail_container.find_element(By.CSS_SELECTOR, "div[data-e2e='v2t-keywords']").text
                except NoSuchElementException:
                    pass
                video_data["caption_detail"] = f"Deskripsi: {desc_text}\nKeywords: {kw_text}".strip()
            except Exception:
                pass
        except NoSuchElementException:
            pass
    except TimeoutException:
        pass

    try:
        WebDriverWait(driver, 15).until(
            EC.presence_of_element_located((By.CSS_SELECTOR, "div[class*='DivCommentListContainer']"))
        )
        
        reply_xpath = "//span[contains(text(), 'balasan') or (contains(text(), 'View') and contains(text(), 'repl'))]"
        stall = 0
        last_count = 0
        
        for _ in range(15):
            try:
                btns = driver.find_elements(By.XPATH, reply_xpath)
                if btns:
                    driver.execute_script("arguments[0].click();", btns[0])
                    time.sleep(2)
                    stall = 0
                    continue
            except Exception:
                pass

            driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
            time.sleep(3)
            cur = len(driver.find_elements(By.XPATH, '//div[contains(@class, "DivCommentItemWrapper")]'))
            if cur > last_count:
                last_count = cur
                stall = 0
            else:
                stall += 1
                if stall >= 4:
                    break

        items = driver.find_elements(By.XPATH, '//div[contains(@class, "DivCommentItemWrapper")]')
        for item in items:
            try:
                author_el = item.find_elements(By.XPATH, './/div[@data-e2e="comment-username-1"]//p')
                if author_el:
                    cat_text = item.find_element(By.XPATH, './/span[@data-e2e="comment-level-1"]').text.strip()
                    if cat_text:
                        video_data["comments"].append({
                            "author": author_el[0].text.strip(),
                            "comment": cat_text,
                            "replies": []
                        })
                    continue
                
                # Check for replies (level 2)
                r_author_el = item.find_elements(By.XPATH, './/div[@data-e2e="comment-username-2"]//p')
                if r_author_el and video_data["comments"]:
                    r_text = item.find_element(By.XPATH, './/span[@data-e2e="comment-level-2"]').text.strip()
                    if r_text:
                        video_data["comments"][-1]["replies"].append({
                            "author": r_author_el[0].text.strip(),
                            "comment": r_text
                        })
            except Exception:
                pass
    except TimeoutException:
        pass

    return video_data


# ── Public API ─────────────────────────────────────────────────────────────────

def scrape_tiktok(cookie_str: str, target_username: str, max_videos: int = 20) -> list:
    """
    Scrape captions & comments from a TikTok profile.

    Returns:
        list of dicts with: url, profile_username, upload_date, like_count,
                            caption_short, caption_detail, comments, scrape_date
    """
    if not target_username:
        print("[TikTok] target_username tidak ada.")
        return []

    username = target_username.lstrip("@")
    profile_url = f"https://www.tiktok.com/@{username}"

    driver = _create_driver(mobile=False)
    all_data: list = []

    try:
        if cookie_str and cookie_str.strip():
            _inject_cookies(driver, cookie_str)

        links = _get_video_links(driver, profile_url, max_videos)

        for url in links:
            try:
                data = _scrape_video(driver, url, username)
                if data:
                    all_data.append(data)
            except Exception as e:
                print(f"[TikTok] Error {url}: {e}")
            time.sleep(1.5)

    except Exception as e:
        print(f"[TikTok] Fatal error: {e}")
    finally:
        try:
            driver.quit()
        except Exception:
            pass

    return all_data