"""
Script 任务处理器
================

管理脚本生成的执行。
不占用 Kling/Volc 槽位，使用独立的 script 槽位池。
"""

import logging
from typing import Any

from app.scheduler.handlers.base import AsyncHandler
from app.scheduler.models import StateChange
from app.scheduler.registry import JobRegistry
from app.scheduler.slot_manager import SlotManager
from app.services.anytocopy_service import get_anytocopy_service
from app.services.script_service import ScriptService

logger = logging.getLogger(__name__)

SLOT_KEY = "script:slots"
MAX_SLOTS = 10


class ScriptHandler(AsyncHandler):
    name = "script"
    slot_key = SLOT_KEY
    max_slots = MAX_SLOTS

    async def tick(
        self, jobs: list[Any], registry: JobRegistry, slots: SlotManager
    ) -> list[StateChange]:
        changes: list[StateChange] = []

        for job in jobs:
            acquired = await slots.acquire(SLOT_KEY, job.job_id, MAX_SLOTS)
            if not acquired:
                continue

            try:
                changes.extend(await self._process_job(job, registry, slots))
            except Exception as e:
                logger.exception(f"[Script {job.job_id}] failed")
                changes.append(StateChange(job_id=job.job_id, field_path="status", value="failed"))
                changes.append(
                    StateChange(job_id=job.job_id, field_path="error", value=str(e)[:500])
                )
            finally:
                await slots.release(SLOT_KEY, job.job_id)

        return changes

    async def _process_job(
        self, job: Any, registry: JobRegistry, slots: SlotManager
    ) -> list[StateChange]:
        changes: list[StateChange] = []
        params = job.params or {}
        topic = params.get("topic", "")
        style = params.get("style", "default")
        duration = params.get("duration", 60)

        await registry.update(
            job.job_id,
            status="running",
            progress=10,
            message="分析需求中...",
            completed=0,
            total=1,
        )

        try:
            await __import__("asyncio").sleep(2)
            anytocopy = get_anytocopy_service()
            extract_result = await anytocopy.extract_text_from_input(topic)
            extracted_info = None
            actual_topic = topic
            is_video_url = extract_result.get("is_video_url", False)

            if is_video_url:
                await registry.update(
                    job.job_id,
                    progress=30,
                    message="提取视频素材中...",
                )
                video_info = extract_result.get("video_info")
                if video_info:
                    extracted_info = {
                        "title": video_info.title,
                        "content": video_info.content,
                        "text_content": video_info.text_content,
                        "platform": video_info.platform,
                        "duration": video_info.duration,
                        "original_url": topic,
                    }
                actual_topic = extract_result.get("extracted_text") or topic
                await registry.update(
                    job.job_id,
                    progress=60,
                    message="生成脚本中...",
                )
            else:
                await registry.update(
                    job.job_id,
                    progress=40,
                    message="构思脚本中...",
                )

            service = ScriptService()
            shots = await service.generate_script(
                topic=actual_topic, script_type=style, duration=duration
            )

            # 计算分镜真实总时长
            total_duration = sum(s.duration for s in shots if s.duration)
            result_data = {
                "title": actual_topic[:50],
                "scenes": [s.model_dump() for s in shots],
                "total_duration": total_duration,
                "style": style,
                "shot_count": len(shots),
                "extracted_info": extracted_info,
            }

            changes.append(StateChange(job_id=job.job_id, field_path="status", value="completed"))
            changes.append(StateChange(job_id=job.job_id, field_path="progress", value=100))
            changes.append(
                StateChange(job_id=job.job_id, field_path="message", value="脚本生成完成")
            )
            changes.append(StateChange(job_id=job.job_id, field_path="completed", value=1))
            changes.append(StateChange(job_id=job.job_id, field_path="total", value=1))
            changes.append(StateChange(job_id=job.job_id, field_path="result", value=result_data))

        except Exception as exc:
            logger.exception(f"[ScriptTask {job.job_id}] Failed")
            changes.append(StateChange(job_id=job.job_id, field_path="status", value="failed"))
            changes.append(
                StateChange(job_id=job.job_id, field_path="message", value=str(exc)[:200])
            )
            changes.append(StateChange(job_id=job.job_id, field_path="error", value=str(exc)[:500]))

        return changes