from typing import List, TYPE_CHECKING

from PyQt6.QtWidgets import QMessageBox, QDialog

from warchron.constants import ItemType, RefreshScope

if TYPE_CHECKING:
    from warchron.controller.app_controller import AppController
from warchron.controller.dtos import (
    ParticipantOption,
    WarParticipantDTO,
    ObjectiveDTO,
)
from warchron.view.war_dialog import WarDialog
from warchron.view.objective_dialog import ObjectiveDialog
from warchron.view.war_participant_dialog import WarParticipantDialog


class WarController:
    def __init__(self, app: "AppController"):
        self.app = app

    def _fill_war_details(self, war_id: str) -> None:
        war = self.app.model.get_war(war_id)
        self.app.view.show_war_details(name=war.name, year=war.year)
        objectives = war.get_all_objectives()
        objectives_for_display: List[ObjectiveDTO] = [
            ObjectiveDTO(id=obj.id, name=obj.name, description=obj.description)
            for obj in objectives
        ]
        self.app.view.display_war_objectives(objectives_for_display)
        war_parts = war.get_all_war_participants()
        participants_for_display: List[WarParticipantDTO] = [
            WarParticipantDTO(
                id=p.id,
                player_name=self.app.model.get_player_name(p.player_id),
                faction=p.faction,
            )
            for p in war_parts
        ]
        self.app.view.display_war_participants(participants_for_display)

    def _validate_war_inputs(self, name: str, year: int) -> bool:
        if not name.strip():
            QMessageBox.warning(
                self.app.view, "Invalid name", "War name cannot be empty."
            )
            return False
        if not (1970 <= year <= 3000):
            QMessageBox.warning(
                self.app.view, "Invalid year", "Year must be between 1970 and 3000."
            )
            return False
        return True

    def add_war(self) -> None:
        dialog = WarDialog(
            self.app.view, default_year=self.app.model.get_default_war_values()["year"]
        )
        result = dialog.exec()  # modal blocking dialog
        if result == QDialog.DialogCode.Accepted:
            name = dialog.get_war_name()
            year = dialog.get_war_year()
            if not self._validate_war_inputs(name, year):
                return
            war = self.app.model.add_war(name, year)
            self.app.is_dirty = True
            self.app.navigation.refresh_and_select(
                RefreshScope.WARS_TREE, item_type=ItemType.WAR, item_id=war.id
            )

    def edit_war(self, war_id: str) -> None:
        war = self.app.model.get_war(war_id)
        war_dialog = WarDialog(
            self.app.view, default_name=war.name, default_year=war.year
        )
        if war_dialog.exec() == QDialog.DialogCode.Accepted:
            name = war_dialog.get_war_name()
            year = war_dialog.get_war_year()
            if not self._validate_war_inputs(name, year):
                return
            self.app.model.update_war(war_id, name=name, year=year)

    # Objective methods

    def _validate_objective_inputs(self, name: str, description: str) -> bool:
        if not name.strip():
            QMessageBox.warning(
                self.app.view, "Invalid name", "Objective name cannot be empty."
            )
            return False
        return True

    def add_objective(self) -> None:
        if not self.app.navigation.selected_war_id:
            return
        dialog = ObjectiveDialog(self.app.view)
        if dialog.exec() != QDialog.DialogCode.Accepted:
            return
        name = dialog.get_objective_name()
        description = dialog.get_objective_description()
        if not self._validate_objective_inputs(name, description):
            return
        self.app.model.add_objective(
            self.app.navigation.selected_war_id, name, description
        )
        self.app.is_dirty = True
        self.app.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)

    def edit_objective(self, objective_id: str) -> None:
        obj = self.app.model.get_objective(objective_id)
        obj_dialog = ObjectiveDialog(
            self.app.view, default_name=obj.name, default_description=obj.description
        )
        if obj_dialog.exec() == QDialog.DialogCode.Accepted:
            name = obj_dialog.get_objective_name()
            description = obj_dialog.get_objective_description()
            if not self._validate_objective_inputs(name, description):
                return
            self.app.model.update_objective(
                objective_id, name=name, description=description
            )

    # War participant methods

    def add_war_participant(self) -> None:
        if not self.app.navigation.selected_war_id:
            return
        players = self.app.model.get_available_players(
            self.app.navigation.selected_war_id
        )
        play_opts: List[ParticipantOption] = [
            ParticipantOption(id=p.id, name=p.name) for p in players
        ]
        dialog = WarParticipantDialog(self.app.view, players=play_opts)
        if dialog.exec() != QDialog.DialogCode.Accepted:
            return
        player_id = dialog.get_player_id()
        faction = dialog.get_participant_faction()
        if not player_id:
            return
        self.app.model.add_war_participant(
            self.app.navigation.selected_war_id, player_id, faction
        )
        self.app.is_dirty = True
        self.app.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)

    def edit_war_participant(self, participant_id: str) -> None:
        war_part = self.app.model.get_war_participant(participant_id)
        player = self.app.model.get_player(war_part.player_id)
        play_opt = ParticipantOption(id=player.id, name=player.name)
        war_part_dialog = WarParticipantDialog(
            self.app.view,
            players=[play_opt],
            default_player_id=war_part.id,
            default_faction=war_part.faction,
            editable_player=False,
        )
        if war_part_dialog.exec() == QDialog.DialogCode.Accepted:
            faction = war_part_dialog.get_participant_faction()
            self.app.model.update_war_participant(participant_id, faction=faction)