"""
可复用的 StreamField Block 库。
参见 documents/设计方案分析与完善版.md §2.6 组件清单。
"""
from django.utils.translation import gettext_lazy as _
from wagtail import blocks
from wagtail.images.blocks import ImageChooserBlock


class CTAButtonBlock(blocks.StructBlock):
    text = blocks.CharBlock(max_length=50, label=_("按钮文案"))
    link = blocks.URLBlock(label=_("按钮链接"))

    class Meta:
        icon = "link"
        label = _("按钮")


class HeroBlock(blocks.StructBlock):
    title = blocks.CharBlock(max_length=120, label=_("标题"))
    subtitle = blocks.TextBlock(required=False, label=_("副标题"))
    background_image = ImageChooserBlock(required=False, label=_("背景图"))
    buttons = blocks.ListBlock(CTAButtonBlock(), label=_("按钮组"))

    class Meta:
        icon = "image"
        label = _("首屏 Hero")
        template = "core/blocks/hero_block.html"


class StatItemBlock(blocks.StructBlock):
    value = blocks.CharBlock(max_length=20, label=_("数值"))
    label = blocks.CharBlock(max_length=50, label=_("说明文字"))


class StatsBlock(blocks.StructBlock):
    items = blocks.ListBlock(StatItemBlock(), label=_("数据项"))

    class Meta:
        icon = "site"
        label = _("数据展示")
        template = "core/blocks/stats_block.html"


class FeatureBlock(blocks.StructBlock):
    icon = blocks.CharBlock(max_length=50, required=False, label=_("图标"))
    title = blocks.CharBlock(max_length=100, label=_("标题"))
    description = blocks.TextBlock(label=_("描述"))

    class Meta:
        icon = "pick"
        label = _("能力/优势")
        template = "core/blocks/feature_block.html"


class FeatureGridBlock(blocks.StructBlock):
    heading = blocks.CharBlock(max_length=100, required=False, label=_("模块标题"))
    items = blocks.ListBlock(FeatureBlock(), label=_("能力列表"))

    class Meta:
        icon = "grip"
        label = _("能力网格")


class FAQItemBlock(blocks.StructBlock):
    question = blocks.CharBlock(max_length=200, label=_("问题"))
    answer = blocks.RichTextBlock(label=_("回答"))


class FAQBlock(blocks.StructBlock):
    items = blocks.ListBlock(FAQItemBlock(), label=_("问答列表"))

    class Meta:
        icon = "help"
        label = _("常见问题")
        template = "core/blocks/faq_block.html"


class CTABlock(blocks.StructBlock):
    heading = blocks.CharBlock(max_length=120, label=_("标题"))
    description = blocks.TextBlock(required=False, label=_("描述"))
    button = CTAButtonBlock(label=_("按钮"))

    class Meta:
        icon = "plus"
        label = _("行动号召 CTA")
        template = "core/blocks/cta_block.html"


class LogoCloudBlock(blocks.StructBlock):
    heading = blocks.CharBlock(max_length=100, required=False, label=_("标题"))
    logos = blocks.ListBlock(ImageChooserBlock(), label=_("Logo 列表"))

    class Meta:
        icon = "image"
        label = _("客户 Logo 墙")
        template = "core/blocks/logo_cloud_block.html"


COMMON_BLOCKS = [
    ("hero", HeroBlock()),
    ("stats", StatsBlock()),
    ("feature_grid", FeatureGridBlock()),
    ("faq", FAQBlock()),
    ("cta", CTABlock()),
    ("logo_cloud", LogoCloudBlock()),
    ("richtext", blocks.RichTextBlock(label=_("富文本"))),
]