"""将物料默认配置补入新增动作，并检查动作是否符合规划，不执行画布更新"""

from copy import deepcopy
from math import isclose

from app.processor.state import QueryState
from app.schemas.action_validation import ActionValidationError
from app.schemas.actions import (
    ActionBatch,
    AddAction,
    DeleteAction,
    MoveAction,
    ResizeAction,
    UpdateAction,
    UpdateCanvasAction,
)
from app.schemas.component_resource import ComponentDefinition
from app.schemas.screen import Screen, ScreenNode
from app.schemas.screen_plan import PlanComponent


def plan_block_reason(state: QueryState) -> str | None:
    """检查规划是否在当前支持范围内，不支持时返回原因"""
    plan = state["screen_plan"]
    resources = state.get("component_resources")
    if state["requirement"].needs_clarification:
        return "需求尚未澄清，不能生成规划动作"
    if plan.resource_needs:
        return "规划仍有待获取资源，不能直接生成动作"
    additions = [item for item in plan.components if item.disposition == "add"]
    removals = {
        item.target_id for item in plan.components if item.disposition == "remove"
    }
    modifications = {
        item.target_id: item for item in plan.components if item.disposition == "modify"
    }
    if not additions and not modifications and not removals and not plan.canvas_changes:
        return "规划未包含可执行的组件或画布修改"
    if additions and (resources is None or resources.status != "resolved"):
        return "组件目录尚未就绪"
    supported = {item.type for item in resources.components} if resources else set()
    if any(item.component_type not in supported for item in additions):
        return "规划中的新增类型未在组件目录中找到"
    nodes = {node.id: node for node in state["input_context"].screen.nodes}
    for item in plan.components:
        if item.disposition == "add":
            continue
        if item.target_id not in nodes:
            return f"规划目标不存在: {item.target_id}"
        if (
            item.component_type is not None
            and item.component_type != nodes[item.target_id].type
        ):
            return "当前不支持更换已有组件类型"
    # 已有目标的修改诉求不能通过 keep 或遗漏目标绕过
    supported_operations = {"move", "resize", "update", "restyle", "reflow", "layout"}
    changes = state["requirement"].changes

    # 删除必须逐个目标获得明确授权，整体布局调整不隐含删除权限
    allowed_removals = {
        target
        for change in changes
        if change.target_scope == "nodes" and change.operation == "delete"
        for target in change.target_ids
    }

    if removals != allowed_removals:
        return "规划删除目标与需求不一致，不能遗漏或扩大删除范围"

    for change in changes:
        if change.target_scope == "canvas" and change.operation in {
            "update",
            "resize",
            "update_canvas",
        }:
            if not plan.canvas_changes:
                return "规划遗漏画布修改需求"
        elif change.target_scope == "screen" and change.operation == "add":
            if not additions:
                return "规划遗漏新增需求"
        elif change.target_scope == "nodes" and change.operation == "delete":
            continue
        elif (
            change.target_scope in {"nodes", "screen"}
            and change.operation in supported_operations
        ):
            if not modifications or any(
                target not in modifications for target in change.target_ids
            ):
                return "规划遗漏需要调整的组件"
        else:
            return "需求包含未支持的操作，当前不能只执行部分规划"

    if (
        modifications
        and changes
        and not any(
            change.target_scope == "screen" and change.operation in supported_operations
            for change in changes
        )
    ):
        allowed = {target for change in changes for target in change.target_ids}
        if set(modifications) - allowed:
            return "规划调整了需求范围外的组件"
    return None


def plan_materials(state: QueryState) -> list[dict]:
    """提取规划需要的完整物料配置，供动作生成和修正使用"""
    types = {
        item.component_type
        for item in state["screen_plan"].components
        if item.disposition == "add"
    }
    if not types:
        return []
    return [
        item.model_dump(mode="json", by_alias=True)
        for item in state["component_resources"].components
        if item.type in types
    ]


def merge_config(defaults: dict, overrides: dict) -> dict:
    # 对象逐层覆盖，数组和标量整体替换，不修改目录或模型输出
    result = deepcopy(defaults)
    for key, value in overrides.items():
        result[key] = (
            merge_config(result[key], value)
            if isinstance(result.get(key), dict) and isinstance(value, dict)
            else deepcopy(value)
        )
    return result


def assemble_plan_actions(state: QueryState, batch: ActionBatch) -> ActionBatch:
    """用物料默认配置补全新增节点，模型显式提供的字段优先"""
    resources = state.get("component_resources")
    materials = {item.key: item for item in resources.components} if resources else {}
    result = batch.model_copy(deep=True)
    for action in result.actions:
        if not isinstance(action, AddAction) or action.component_key not in materials:
            continue
        material = materials[action.component_key]
        node = merge_config(
            material.schema_.model_dump(mode="json"),
            action.node.model_dump(mode="json", exclude_unset=True),
        )
        action.node = ScreenNode.model_validate(node)
        # 保守标记物料含示例数据，不能由模型声称已取得真实数据
        action.sample_data = material.sample_data
    return result


def _validate_canvas_action(
    action: UpdateCanvasAction, planned_fields: set[str], covered_fields: set[str]
) -> str | None:
    """检查画布字段范围，通过后记录已覆盖字段，最终值在执行后检查"""
    if extra := set(action.properties) - planned_fields:
        return f"不能修改规划外的画布字段: {sorted(extra)}"
    covered_fields.update(action.properties)
    return None


def _validate_delete_action(
    action: DeleteAction, planned_ids: set[str], removed_ids: set[str]
) -> str | None:
    """只允许删除 remove 目标，通过后记录目标以防重复删除"""
    if action.target_id not in planned_ids:
        return f"不能删除非 remove 规划目标: {action.target_id}"
    if action.target_id in removed_ids:
        return f"不能重复删除组件: {action.target_id}"
    removed_ids.add(action.target_id)
    return None


def _validate_modify_action(
    action: MoveAction | ResizeAction | UpdateAction,
    planned: dict[str, PlanComponent],
    modified_ids: set[str],
) -> str | None:
    """只允许调整 modify 目标，属性更新还需规划中有设计要求"""
    if action.target_id not in planned:
        return f"不能修改保留或未提及的组件: {action.target_id}"
    if isinstance(action, UpdateAction) and not planned[action.target_id].design:
        return f"规划未要求修改属性: {action.target_id}"
    modified_ids.add(action.target_id)
    return None


def _validate_add_action(
    action: AddAction,
    planned: dict[str, PlanComponent],
    materials: dict[str, ComponentDefinition],
    existing_ids: set[str],
    seen_plan_ids: set[str],
) -> str | None:
    """检查新增规划关联、ID、物料类型、布局及数据标记"""
    if action.plan_id not in planned:
        return f"动作未关联有效的新增规划: {action.plan_id}"
    if action.plan_id in seen_plan_ids:
        return f"同一规划组件不能重复新增: {action.plan_id}"
    if action.node.id in existing_ids:
        return f"新增组件不能复用原有 ID: {action.node.id}"

    # 关联有效即记录出现，后续配置错误单独报告，不再重复报遗漏
    seen_plan_ids.add(action.plan_id)
    item = planned[action.plan_id]
    material = materials.get(action.component_key)
    if (
        material is None
        or material.type != item.component_type
        or action.node.type != item.component_type
    ):
        return "新增节点类型、物料和规划类型不一致"
    if item.layout is not None and action.node.layout != item.layout:
        return f"新增布局与规划不一致: {item.plan_id}"
    if action.sample_data != material.sample_data:
        return "示例数据标记与物料不一致"
    if action.node.model_extra.get("dataId"):
        return "当前尚未接入数据绑定，不能生成 dataId"
    return None


def validate_plan_actions(
    state: QueryState, batch: ActionBatch
) -> list[ActionValidationError]:
    """检查动作是否覆盖规划，禁止修改 keep 或未提及的组件"""
    # 先检查规划是否可执行，不支持时直接返回原因
    if reason := plan_block_reason(state):
        return [ActionValidationError(code="scope_error", message=reason)]
    # 新增动作通过 plan_id 查找对应规划
    expected = {
        item.plan_id: item
        for item in state["screen_plan"].components
        if item.disposition == "add"
    }
    # 修改动作通过已有组件 ID 查找对应规划
    modifications = {
        item.target_id: item
        for item in state["screen_plan"].components
        if item.disposition == "modify"
    }
    # 物料按 key 索引，用于核对新增组件的类型和示例数据标记
    resources = state.get("component_resources")
    materials = {item.key: item for item in resources.components} if resources else {}
    seen: set[str] = set()  # 已关联的新增规划编号
    modified: set[str] = set()  # 已覆盖的修改目标
    # 只有规划标为 remove 的组件才允许删除
    removals = {
        item.target_id
        for item in state["screen_plan"].components
        if item.disposition == "remove"
    }
    removed: set[str] = set()  # 已覆盖的删除目标
    canvas_fields: set[str] = set()  # 已覆盖的画布字段
    planned_canvas = state[
        "screen_plan"
    ].canvas_changes  # 规划要求修改的画布字段及最终值
    errors = []

    # 保存原有组件 ID，防止新增组件复用已有 ID
    existing_ids = {node.id for node in state["input_context"].screen.nodes}
    # 按顺序校验每个动作，保留索引以便定位错误
    for index, action in enumerate(batch.actions):
        if isinstance(action, UpdateCanvasAction):
            # 检查画布字段是否超出规划，并记录已覆盖字段
            message = _validate_canvas_action(
                action, set(planned_canvas), canvas_fields
            )
        elif isinstance(action, DeleteAction):
            # 检查删除目标是否允许、是否重复，并记录已删除目标
            message = _validate_delete_action(action, removals, removed)
        elif isinstance(action, AddAction):
            # 核对新增规划、ID、物料和布局，并记录已关联的规划编号
            message = _validate_add_action(
                action, expected, materials, existing_ids, seen
            )
        elif isinstance(action, (MoveAction, ResizeAction, UpdateAction)):
            # 检查目标是否允许修改，更新属性时还需有设计要求
            message = _validate_modify_action(action, modifications, modified)
        else:
            # 未接入规划校验的动作返回错误，避免静默放行
            message = "规划调整仅支持 move、resize 和 update"
        if message:
            # 将错误与动作索引关联，继续收集其余动作的问题
            errors.append(
                ActionValidationError(
                    action_index=index, code="scope_error", message=message
                )
            )

    # 逐条合法还不够，整批动作必须覆盖全部规划目标
    for label, missing in (
        ("新增规划组件", set(expected) - seen),
        ("调整规划组件", set(modifications) - modified),
        ("删除规划组件", removals - removed),
        ("画布规划字段", set(planned_canvas) - canvas_fields),
    ):
        if missing:
            # 遗漏属于整批动作的问题，不关联某一条动作索引
            errors.append(
                ActionValidationError(
                    code="scope_error", message=f"遗漏{label}: {sorted(missing)}"
                )
            )
    return errors


def validate_plan_result(
    state: QueryState, screen: Screen
) -> list[ActionValidationError]:
    """检查整批执行后的组件布局和画布属性是否达到规划要求"""
    nodes = {node.id: node for node in screen.nodes}
    errors = [
        ActionValidationError(
            code="scope_error", message=f"执行后的布局与规划不一致: {item.target_id}"
        )
        for item in state["screen_plan"].components
        if item.disposition == "modify"
        and item.layout is not None
        and not all(
            isclose(
                getattr(nodes[item.target_id].layout, key),
                value,
                rel_tol=0,
                abs_tol=1e-9,
            )
            if key in {"x", "y", "width", "height"}
            else nodes[item.target_id].layout.model_dump().get(key) == value
            for key, value in item.layout.model_dump().items()
        )
    ]
    canvas = screen.canvas.model_dump()
    for key, value in state["screen_plan"].canvas_changes.items():
        if key not in canvas or canvas[key] != value:
            errors.append(
                ActionValidationError(
                    code="scope_error", message=f"执行后的画布属性与规划不一致: {key}"
                )
            )
    return errors