"""Local deterministic demo adapters for portfolio Docker demos."""

from __future__ import annotations

from typing import Literal

from app.services.adapters.base import BaseAdapter
from app.services.adapters.registry import AdapterRegistry
from app.services.adapters.storybook.primary import Storybook, StorybookPage
from app.services.adapters.text.models import StoryOutput


def _compact_topic(data: str) -> str:
    parts = [
        item.strip(" ，,。.!！?？")
        for item in data.replace("\n", " ").split()
        if item.strip(" ，,。.!！?？")
    ]
    if parts:
        return "、".join(parts[:3])
    return data.strip()[:20] or "星光森林"


def _demo_image_data_url(label: str) -> str:
    return (
        "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' "
        "viewBox='0 0 1200 800'%3E%3Crect width='1200' height='800' "
        "fill='%23fef3c7'/%3E%3Ccircle cx='250' cy='180' r='130' "
        "fill='%23f59e0b'/%3E%3Cpath d='M120 600C320 420 520 700 "
        "720 500S1020 420 1100 560' fill='none' stroke='%237c3aed' "
        "stroke-width='42'/%3E%3C/svg%3E"
    )


@AdapterRegistry.register("text", "demo")
class DemoTextAdapter(BaseAdapter[StoryOutput]):
    """Generate a stable local story without external AI services."""

    adapter_type = "text"
    adapter_name = "demo"

    async def execute(
        self,
        input_type: Literal["keywords", "full_story"],
        data: str,
        education_theme: str | None = None,
        memory_context: str | None = None,
        **kwargs,
    ) -> StoryOutput:
        theme = education_theme or "勇气与想象力"
        topic = _compact_topic(data)
        title = f"{topic}的晚安冒险"
        protagonist = "小星"
        if memory_context and "名字" in memory_context:
            protagonist = "故事里的小朋友"

        story_text = (
            f"睡前，{protagonist}把“{topic}”写在一张小纸条上，轻轻放进枕头下面。"
            f"月光刚好照进房间，纸条变成了一只会发光的小船，邀请{protagonist}去寻找"
            f"关于“{theme}”的答案。\n\n"
            f"小船穿过云朵河，来到一片会唱歌的森林。森林里的小鹿说：真正的勇敢不是"
            f"一点也不害怕，而是害怕的时候，还愿意牵住朋友的手往前走。{protagonist}"
            f"听完以后，把一颗星星种进土里，星星长成了照亮回家路的小灯。\n\n"
            f"回到房间时，纸条已经变成了一枚金色书签。{protagonist}把它夹进故事书，"
            f"决定明天也带着好奇心和温柔，继续新的冒险。"
        )

        return StoryOutput(
            mode="generated" if input_type == "keywords" else "enhanced",
            title=title,
            story_text=story_text,
            cover_prompt_suggestion=f"温暖水彩儿童绘本封面，主题：{topic}，{theme}",
        )

    async def health_check(self) -> bool:
        return True

    @property
    def estimated_cost(self) -> float:
        return 0.0


@AdapterRegistry.register("image", "demo")
class DemoImageAdapter(BaseAdapter[str]):
    """Return a compact SVG data URL as a generated-image placeholder."""

    adapter_type = "image"
    adapter_name = "demo"

    async def execute(self, prompt: str, **kwargs) -> str:
        return _demo_image_data_url(prompt)

    async def health_check(self) -> bool:
        return True

    @property
    def estimated_cost(self) -> float:
        return 0.0


@AdapterRegistry.register("storybook", "demo")
class DemoStorybookAdapter(BaseAdapter[Storybook]):
    """Generate a stable local storybook without external AI services."""

    adapter_type = "storybook"
    adapter_name = "demo"

    async def execute(
        self,
        keywords: str,
        page_count: int = 6,
        education_theme: str | None = None,
        memory_context: str | None = None,
        **kwargs,
    ) -> Storybook:
        theme = education_theme or "勇气"
        topic = _compact_topic(keywords)
        page_count = max(4, min(page_count, 8))
        page_texts = [
            f"小星在枕头下发现一张写着“{topic}”的星光地图。",
            "地图带他来到云朵河边，一只小船正在等他上船。",
            f"森林里的小鹿告诉他：{theme}藏在每一次温柔的选择里。",
            "小星把一颗星星种进土里，星星长成了回家的灯。",
            "他把今天的发现画进故事本，准备明天讲给家人听。",
            "月亮轻轻合上窗帘，房间里只剩下甜甜的梦。",
            "星光地图变成书签，陪他继续下一次冒险。",
            "每个勇敢的小问题，都能长出一个温暖的故事。",
        ]
        pages = [
            StorybookPage(
                page_number=index + 1,
                text=page_texts[index],
                image_prompt=f"温暖儿童绘本插画，第 {index + 1} 页，{topic}，{theme}",
            )
            for index in range(page_count)
        ]

        return Storybook(
            title=f"{topic}的星光绘本",
            main_character="小星",
            art_style="温暖水彩",
            pages=pages,
            cover_prompt=f"温暖水彩儿童绘本封面，{topic}，{theme}",
        )

    async def health_check(self) -> bool:
        return True

    @property
    def estimated_cost(self) -> float:
        return 0.0