"""
插件数据模型
定义插件元数据规范和数据类
"""

from typing import Dict, List, Optional, Any
from enum import Enum
from pydantic import BaseModel, Field, field_validator, model_validator, ValidationError
from datetime import datetime


class PluginStatus(str, Enum):
    """插件状态枚举

    状态流转：
    - discovered: 启动扫描发现，未加载
    - loaded: 加载完成，等待启用
    - enabled: 用户启用，可用
    - disabled: 用户禁用
    - error: 加载/运行错误
    - dependency_error: 依赖缺失或版本不匹配
    - incomplete: 元数据不完整（缺分类、能力标签等）
    """

    # 保留旧状态兼容
    INSTALLED = "installed"
    INSTALLING = "installing"
    UNINSTALLING = "uninstalling"

    # 新状态
    DISCOVERED = "discovered"
    LOADED = "loaded"
    ENABLED = "enabled"
    DISABLED = "disabled"
    ERROR = "error"
    DEPENDENCY_ERROR = "dependency_error"
    INCOMPLETE = "incomplete"


class PluginDependency(BaseModel):
    """插件依赖"""

    name: str
    version: str
    optional: bool = False


class PluginMetadata(BaseModel):
    """插件元数据 - plugin.json 结构"""

    name: str = Field(..., description="插件唯一标识符")
    version: str = Field(..., description="插件版本")
    description: str = Field(..., description="插件描述")
    author: str = Field(..., description="插件作者")

    # 可选字段
    homepage: Optional[str] = Field(None, description="插件主页URL")
    ui_path: Optional[str] = Field(None, description="插件UI路径")

    # 依赖和配置
    requirements: List[str] = Field(default_factory=list, description="Python依赖")
    dependencies: List[PluginDependency] = Field(
        default_factory=list, description="插件依赖"
    )
    config_schema: Optional[Dict[str, Any]] = Field(None, description="配置模式")

    @field_validator("name")
    @classmethod
    def validate_name(cls, v):
        """验证插件名称"""
        if not v.replace("_", "").isalnum():
            raise ValueError("插件名称只能包含字母、数字和下划线")
        return v.lower()

    @field_validator("version")
    @classmethod
    def validate_version(cls, v):
        """验证版本格式"""
        # 简单的版本格式验证
        if not all(part.isdigit() for part in v.split(".")[:3]):
            raise ValueError("版本号格式应为 X.Y.Z")
        return v

    def __init__(self, **data):
        """初始化 - 自动映射 homepage 到 ui_path"""
        # 如果没有 ui_path 但有 homepage，使用 homepage 作为 ui_path
        if "ui_path" not in data and "homepage" in data:
            data["ui_path"] = data["homepage"]
        super().__init__(**data)


class PluginInfo(BaseModel):
    """插件完整信息"""

    # 元数据
    metadata: PluginMetadata

    # 运行时信息
    status: PluginStatus = PluginStatus.INSTALLED
    install_path: str
    install_time: datetime = Field(default_factory=datetime.now)

    # 功能端点
    api_routes: List[str] = Field(default_factory=list)
    ui_routes: List[str] = Field(default_factory=list)

    # 错误信息
    error_message: Optional[str] = None
    last_error: Optional[str] = None

    class Config:
        json_encoders = {datetime: lambda v: v.isoformat()}


class PluginConfig(BaseModel):
    """插件配置"""

    enabled: bool = False
    settings: Dict[str, Any] = Field(default_factory=dict)


class PluginOperationResult(BaseModel):
    """插件操作结果"""

    success: bool
    message: str
    plugin_name: Optional[str] = None
    error: Optional[str] = None
    plugin_info: Optional[Dict[str, Any]] = None

    @classmethod
    def success_result(cls, plugin_name: str, message: str) -> "PluginOperationResult":
        return cls(success=True, plugin_name=plugin_name, message=message)

    @classmethod
    def error_result(cls, plugin_name: str, error: str) -> "PluginOperationResult":
        return cls(
            success=False, plugin_name=plugin_name, message="操作失败", error=error
        )


# ============================================================
# 新增：运行时状态和错误模型
# ============================================================


class PluginErrorStage(str, Enum):
    """错误发生阶段"""

    STRUCTURE = "structure"  # plugin.json 结构错误
    DEPENDENCY = "dependency"  # 依赖检查失败
    LOAD = "load"  # main.py/api.py/mcp.py 导入失败
    RUNTIME = "runtime"  # 运行时错误
    MCP = "mcp"  # MCP 工具调用错误


class PluginErrorInfo(BaseModel):
    """插件错误信息

    用于记录单个插件的结构化错误，支持页面展示和诊断。
    """

    error_code: str = Field(..., description="错误代码，如 MISSING_MAIN_PY")
    message: str = Field(..., description="用户可读错误消息")
    stage: PluginErrorStage = Field(..., description="错误发生阶段")
    detail: Optional[str] = Field(None, description="技术细节，用于调试")
    occurred_at: datetime = Field(default_factory=datetime.now, description="发生时间")


class DependencyCheckStatus(str, Enum):
    """依赖检查状态"""

    SATISFIED = "satisfied"  # 依赖满足
    MISSING = "missing"  # 包缺失
    VERSION_MISMATCH = "version_mismatch"  # 版本不匹配
    CHECK_FAILED = "check_failed"  # 检查过程失败


class DependencyItem(BaseModel):
    """单个依赖项检查结果"""

    name: str = Field(..., description="包名")
    required: Optional[str] = Field(None, description="要求版本，如 >=1.0.0")
    installed: Optional[str] = Field(None, description="已安装版本")
    status: DependencyCheckStatus = Field(..., description="检查状态")
    message: Optional[str] = Field(None, description="状态说明")


class DependencyCheckResult(BaseModel):
    """依赖检查结果"""

    plugin_name: str = Field(..., description="插件名")
    overall_status: DependencyCheckStatus = Field(..., description="整体状态")
    items: List[DependencyItem] = Field(default_factory=list, description="依赖项列表")
    missing_count: int = Field(0, description="缺失数量")
    mismatch_count: int = Field(0, description="版本不匹配数量")
    checked_at: datetime = Field(default_factory=datetime.now, description="检查时间")


# ============================================================
# 新增：治理信息模型
# ============================================================


class PluginCategory(str, Enum):
    """插件分类"""

    CONTENT_EXTRACTION = "content_extraction"  # 内容提取
    BROWSER = "browser"  # 浏览器自动化
    SANDBOX = "sandbox"  # 沙盒执行
    UTILITY = "utility"  # 工具类
    OTHER = "other"  # 其他


class PluginGovernanceInfo(BaseModel):
    """插件治理信息

    用于插件中心展示分类、能力标签、依赖风险和处理决策。
    """

    category: PluginCategory = Field(
        default=PluginCategory.OTHER, description="插件分类"
    )
    capabilities: List[str] = Field(default_factory=list, description="能力标签列表")
    has_mcp_tools: bool = Field(False, description="是否声明 MCP 工具")
    has_api_routes: bool = Field(False, description="是否提供 API 路由")
    has_ui: bool = Field(False, description="是否有前端 UI")
    dependency_risk: Optional[str] = Field(None, description="依赖风险说明")
    handling_decision: Optional[str] = Field(None, description="处理决策说明")


# ============================================================
# 新增：Tool 和 MCP 摘要模型
# ============================================================


class PluginToolSummary(BaseModel):
    """插件 Tool 摘要

    用于插件列表和详情页展示 Tool 状态。
    """

    total: int = Field(0, description="Tool 总数")
    available: int = Field(0, description="可用数量")
    incomplete: int = Field(0, description="元数据不完整数量")


class PluginMcpSummary(BaseModel):
    """插件 MCP 摘要

    用于插件列表和详情页展示 MCP 工具状态。
    """

    total: int = Field(0, description="MCP 工具总数")
    available: int = Field(0, description="可用数量")
    unavailable: int = Field(0, description="不可用数量")


# ============================================================
# 新增：UI 入口模型
# ============================================================


class PluginUIType(str, Enum):
    """插件 UI 类型"""

    STATIC = "static"  # 静态 UI，后端挂载
    SCHEMA = "schema"  # schema 表单，平台渲染
    NONE = "none"  # 无 UI


class UISubmitContract(BaseModel):
    """Schema UI 提交契约

    定义前端表单提交的目标和方式。
    """

    method: str = Field(
        default="POST", description="HTTP 方法，只允许 POST"
    )
    path: str = Field(..., description="提交路径，如 /plugins/{name}/api/run")
    content_type: str = Field(
        default="application/json", description="请求内容类型"
    )
    success_path: Optional[str] = Field(
        None, description="成功响应结果的 JSON 路径"
    )
    error_path: Optional[str] = Field(
        None, description="错误响应消息的 JSON 路径"
    )

    @field_validator("method")
    @classmethod
    def validate_method(cls, v):
        """只允许 POST 方法"""
        if v.upper() != "POST":
            raise ValueError("submit.method 只允许 POST")
        return v.upper()

    @field_validator("path")
    @classmethod
    def validate_path(cls, v):
        """路径必须是相对路径"""
        if v.startswith("http://") or v.startswith("https://"):
            raise ValueError("submit.path 不能是外部 URL")
        if not v.startswith("/"):
            raise ValueError("submit.path 必须以 / 开头")
        return v


class UIFieldDefinition(BaseModel):
    """Schema UI 字段定义"""

    name: str = Field(..., description="字段名")
    label: str = Field(..., description="显示标签")
    type: str = Field(default="string", description="字段类型：string/number/boolean/select")
    required: bool = Field(default=False, description="是否必填")
    default: Optional[Any] = Field(None, description="默认值")
    placeholder: Optional[str] = Field(None, description="占位提示")
    help_text: Optional[str] = Field(None, description="帮助文本")
    validation: Optional[Dict[str, Any]] = Field(None, description="验证规则")


class UISchemaDefinition(BaseModel):
    """Schema UI 定义"""

    title: str = Field(..., description="表单标题")
    description: Optional[str] = Field(None, description="表单描述")
    fields: List[UIFieldDefinition] = Field(
        default_factory=list, description="字段列表"
    )
    result_schema: Optional[Dict[str, Any]] = Field(
        None, description="结果展示 schema"
    )


class PluginUIEntry(BaseModel):
    """插件 UI 入口

    定义插件运行页的 UI 类型和入口信息。
    """

    type: PluginUIType = Field(..., description="UI 类型")
    entry_path: Optional[str] = Field(None, description="静态 UI 路径，type=static 时必填")
    schema: Optional[UISchemaDefinition] = Field(
        None, description="Schema UI 定义，type=schema 时必填"
    )
    submit: Optional[UISubmitContract] = Field(
        None, description="提交契约，type=schema 时必填"
    )
    unavailable_reason: Optional[str] = Field(
        None, description="UI 不可用原因"
    )

    @field_validator("entry_path")
    @classmethod
    def validate_entry_path(cls, v, info):
        """静态 UI 路径校验"""
        # Pydantic V2 中 info.data 可能不包含 type 字段，使用 model_validator 替代
        if v and (".." in v or v.startswith("http")):
            raise ValueError("entry_path 不允许路径穿越或外部 URL")
        return v

    @model_validator(mode="after")
    def validate_static_ui_entry_path(self):
        """验证 type=static 时 entry_path 必填"""
        if self.type == PluginUIType.STATIC and not self.entry_path:
            raise ValueError("type=static 时 entry_path 必填")
        return self


# ============================================================
# 新增：状态文件模型
# ============================================================


class PluginStateEntry(BaseModel):
    """插件状态文件中的单条记录

    保存用户启停状态，与 plugin.json 的 enabled 字段独立。
    """

    enabled: bool = Field(False, description="是否启用")
    updated_at: datetime = Field(
        default_factory=datetime.now, description="最后更新时间"
    )
    updated_by: str = Field(
        default="system", description="更新者：system/user"
    )


class PluginStateStore(BaseModel):
    """插件状态文件模型

    事实源：data/plugin_state.json
    以插件名为 key 保存用户启停状态。
    """

    plugins: Dict[str, PluginStateEntry] = Field(
        default_factory=dict, description="插件状态字典"
    )
    version: int = Field(default=1, description="文件版本号")


# ============================================================
# 新增：插件详情和列表项模型
# ============================================================


class PluginListItem(BaseModel):
    """插件列表项

    用于 GET /api/plugins/ 响应。
    """

    metadata: PluginMetadata = Field(..., description="插件元数据")
    status: PluginStatus = Field(..., description="插件状态")
    dependency_summary: Optional[DependencyCheckResult] = Field(
        None, description="依赖检查摘要"
    )
    governance_summary: Optional[PluginGovernanceInfo] = Field(
        None, description="治理信息摘要"
    )
    tool_summary: PluginToolSummary = Field(
        default_factory=PluginToolSummary, description="Tool 摘要"
    )
    mcp_summary: PluginMcpSummary = Field(
        default_factory=PluginMcpSummary, description="MCP 摘要"
    )
    ui_entry: Optional[PluginUIEntry] = Field(None, description="UI 入口")
    errors: List[PluginErrorInfo] = Field(
        default_factory=list, description="错误列表"
    )


class PluginDetail(BaseModel):
    """插件详情

    用于 GET /api/plugins/{plugin_name} 响应。
    """

    metadata: PluginMetadata = Field(..., description="插件元数据")
    status: PluginStatus = Field(..., description="插件状态")
    install_path: str = Field(..., description="安装路径")
    install_time: Optional[datetime] = Field(None, description="安装时间")

    # 依赖详情
    dependency_check: Optional[DependencyCheckResult] = Field(
        None, description="依赖检查详情"
    )

    # 治理信息
    governance: Optional[PluginGovernanceInfo] = Field(
        None, description="治理信息"
    )

    # API 路由
    api_routes: List[str] = Field(default_factory=list, description="API 路由列表")

    # Tool 列表
    tools: List[Dict[str, Any]] = Field(
        default_factory=list, description="Tool 详情列表"
    )

    # MCP 工具
    mcp_tools: List[Dict[str, Any]] = Field(
        default_factory=list, description="MCP 工具列表"
    )

    # UI 入口
    ui_entry: Optional[PluginUIEntry] = Field(None, description="UI 入口")

    # 错误信息
    errors: List[PluginErrorInfo] = Field(
        default_factory=list, description="错误列表"
    )

    class Config:
        json_encoders = {datetime: lambda v: v.isoformat()}


# ============================================================
# 新增：Tool 目录模型
# ============================================================


class ToolAvailability(str, Enum):
    """Tool 可用状态"""

    AVAILABLE = "available"  # 可用
    UNAVAILABLE = "unavailable"  # 不可用（插件禁用/依赖错误等）
    INCOMPLETE = "incomplete"  # 元数据不完整


class ToolCatalogItem(BaseModel):
    """Tool 目录项

    用于 GET /api/tools 和 GET /api/tools/{tool_name} 响应。
    包含中文名称、用途、参数、示例、错误说明和可用状态。
    """

    name: str = Field(..., description="工具标识符")
    display_name: str = Field(..., description="中文显示名称")
    source: str = Field(..., description="来源：plugin/platform")
    plugin_name: str = Field(..., description="所属插件名")
    purpose: str = Field(..., description="用途说明")
    applies_to: List[str] = Field(
        default_factory=list, description="适用场景列表"
    )
    not_for: List[str] = Field(
        default_factory=list, description="不适用场景列表"
    )
    parameters: Dict[str, Any] = Field(
        default_factory=dict, description="参数 schema"
    )
    input_examples: List[Dict[str, Any]] = Field(
        default_factory=list, description="输入示例"
    )
    output_examples: List[Dict[str, Any]] = Field(
        default_factory=list, description="输出示例"
    )
    common_errors: List[Dict[str, str]] = Field(
        default_factory=list, description="常见错误列表"
    )
    risk_level: str = Field(
        default="low", description="风险等级：low/medium/high"
    )
    availability: ToolAvailability = Field(
        default=ToolAvailability.AVAILABLE, description="可用状态"
    )
    unavailable_reason: Optional[str] = Field(
        None, description="不可用原因"
    )
    incomplete_reasons: Optional[List[str]] = Field(
        None, description="元数据不完整原因列表"
    )