import json
from typing import Literal

import yaml

from app_configs import UNSELECTED_VAR_NAME
from components import typed_dicts as td
from components import utils
from components.structs import ModelStepUIState, PipelineState, PipelineUIState, TossupPipelineState
from workflows.factory import create_new_llm_step
from workflows.structs import Buzzer, ModelStep, TossupWorkflow, Workflow


class PipelineStateManager:
    """Manages a pipeline of multiple steps."""

    def make_pipeline_state(self, state_dict: td.PipelineStateDict) -> PipelineState:
        """Make a state from a state dictionary."""
        return PipelineState(**state_dict)

    def get_formatted_config(self, state_dict: td.PipelineStateDict, format: Literal["json", "yaml"] = "yaml") -> str:
        """Get the full pipeline configuration."""
        state = self.make_pipeline_state(state_dict)
        config = state.workflow.model_dump(exclude_defaults=True)
        if isinstance(state.workflow, TossupWorkflow):
            buzzer_config = state.workflow.buzzer.model_dump(exclude_defaults=False)
            config["buzzer"] = buzzer_config
        if format == "yaml":
            return yaml.dump(config, default_flow_style=False, sort_keys=False, indent=4)
        else:
            return json.dumps(config, indent=4, sort_keys=False)

    def add_step(
        self, state_dict: td.PipelineStateDict, pipeline_change: bool, position: int = -1, name=""
    ) -> td.PipelineStateDict:
        """Create a new step and return its state."""
        state = self.make_pipeline_state(state_dict)
        step_id = state.get_new_step_id()
        step_name = name or f"Step {state.n_steps + 1}"
        new_step = create_new_llm_step(step_id=step_id, name=step_name)
        state = state.insert_step(position, new_step)
        return state.model_dump(), not pipeline_change

    def remove_step(
        self, state_dict: td.PipelineStateDict, pipeline_change: bool, position: int
    ) -> td.PipelineStateDict:
        """Remove a step from the pipeline."""
        state = self.make_pipeline_state(state_dict)
        if 0 <= position < state.n_steps:
            state = state.remove_step(position)
        else:
            raise ValueError(f"Invalid step position: {position}")
        return state.model_dump(), not pipeline_change

    def _move_step(
        self, state_dict: td.PipelineStateDict, position: int, direction: Literal["up", "down"]
    ) -> tuple[td.PipelineStateDict, bool]:
        state = self.make_pipeline_state(state_dict)
        old_order = list(state.ui_state.step_ids)
        utils.move_item(state.ui_state.step_ids, position, direction)
        return state.model_dump(), old_order != list(state.ui_state.step_ids)

    def move_up(self, state_dict: td.PipelineStateDict, pipeline_change: bool, position: int) -> td.PipelineStateDict:
        """Move a step up in the pipeline."""
        new_state_dict, change = self._move_step(state_dict, position, "up")
        if change:
            pipeline_change = not pipeline_change
        return new_state_dict, pipeline_change

    def move_down(
        self, state_dict: td.PipelineStateDict, pipeline_change: bool, position: int
    ) -> td.PipelineStateDict:
        """Move a step down in the pipeline."""
        new_state_dict, change = self._move_step(state_dict, position, "down")
        if change:
            pipeline_change = not pipeline_change
        return new_state_dict, pipeline_change

    def update_model_step_state(
        self, state_dict: td.PipelineStateDict, model_step: ModelStep, ui_state: ModelStepUIState
    ) -> td.PipelineStateDict:
        """Update a particular model step in the pipeline."""
        state = self.make_pipeline_state(state_dict)
        state = state.update_step(model_step, ui_state)
        return state.model_dump()

    def update_output_variables(
        self, state_dict: td.PipelineStateDict, target: str, produced_variable: str
    ) -> td.PipelineStateDict:
        if produced_variable == UNSELECTED_VAR_NAME:
            produced_variable = None
        """Update the output variables for a step."""
        state = self.make_pipeline_state(state_dict)
        state.workflow.outputs[target] = produced_variable
        return state.model_dump()

    def update_model_step_ui(
        self, state_dict: td.PipelineStateDict, step_ui: ModelStepUIState, step_id: str
    ) -> td.PipelineStateDict:
        """Update a step in the pipeline."""
        state = self.make_pipeline_state(state_dict)
        state.ui_state.steps[step_id] = step_ui.model_copy()
        return state.model_dump()

    def get_all_variables(self, state_dict: td.PipelineStateDict, model_step_id: str | None = None) -> list[str]:
        """Get all variables from all steps."""
        return self.make_pipeline_state(state_dict)

    def parse_yaml_workflow(self, yaml_str: str) -> Workflow:
        """Parse a YAML workflow."""
        workflow = yaml.safe_load(yaml_str)
        return Workflow(**workflow)

    def update_workflow_from_code(self, yaml_str: str) -> td.PipelineStateDict:
        """Update a workflow from a YAML string."""
        workflow = self.parse_yaml_workflow(yaml_str)
        return PipelineState.from_workflow(workflow).model_dump()


class TossupPipelineStateManager(PipelineStateManager):
    """Manages a tossup pipeline state."""

    def make_pipeline_state(self, state_dict: td.PipelineStateDict) -> TossupPipelineState:
        """Make a state from a state dictionary."""
        return TossupPipelineState(**state_dict)

    def parse_yaml_workflow(self, yaml_str: str) -> TossupWorkflow:
        """Parse a YAML workflow."""
        workflow = yaml.safe_load(yaml_str)
        return TossupWorkflow(**workflow)

    def update_workflow_from_code(self, yaml_str: str, change_state: bool) -> tuple[td.PipelineStateDict, bool]:
        """Update a workflow from a YAML string."""
        workflow = self.parse_yaml_workflow(yaml_str)
        return TossupPipelineState.from_workflow(workflow).model_dump(), not change_state

    def update_buzzer(
        self,
        state_dict: td.TossupPipelineStateDict,
        confidence_threshold: float,
        method: str,
        tokens_prob: float | None,
    ) -> td.TossupPipelineStateDict:
        """Update the buzzer."""
        state = self.make_pipeline_state(state_dict)
        prob_threshold = float(tokens_prob) if tokens_prob and tokens_prob > 0 else None
        state.workflow.buzzer = Buzzer(
            method=method, confidence_threshold=confidence_threshold, prob_threshold=prob_threshold
        )
        return state.model_dump()