from pathlib import Path

from PyQt6.QtWidgets import QMessageBox

from warchron.model.model import Model
from warchron.model.exception import DomainError, RequiresConfirmation
from warchron.view.view import View
from warchron.constants import ItemType, RefreshScope
from warchron.controller.navigation_controller import NavigationController
from warchron.controller.player_controller import PlayerController
from warchron.controller.war_controller import WarController
from warchron.controller.campaign_controller import CampaignController
from warchron.controller.round_controller import RoundController


class AppController:
    def __init__(self, model: Model, view: View, version: str) -> None:
        self.model: Model = model
        self.view: View = view
        self.app_version = version
        self.navigation = NavigationController(self)
        self.players = PlayerController(self)
        self.wars = WarController(self)
        self.campaigns = CampaignController(self)
        self.rounds = RoundController(self)
        self.current_file: Path | None = None
        self.view.on_close_callback = self.on_app_close
        self.is_dirty: bool = False
        self.__connect()
        self.navigation.refresh_players_view()
        self.navigation.refresh_wars_view()
        self.update_window_title()
        self.view.on_tree_selection_changed = self.navigation.on_tree_selection_changed
        self.view.on_add_item = self.add_item

    def __connect(self) -> None:
        self.view.actionExit.triggered.connect(self.view.close)
        self.view.actionNew.triggered.connect(self.new)
        self.view.actionOpen.triggered.connect(self.open_file)
        self.view.actionSave.triggered.connect(self.save)
        self.view.actionSave_as.triggered.connect(self.save_as)
        self.view.actionAbout.triggered.connect(self.show_about)
        self.view.addPlayerBtn.clicked.connect(lambda: self.add_item(ItemType.PLAYER))
        self.view.addWarBtn.clicked.connect(lambda: self.add_item(ItemType.WAR))
        self.view.majorValue.valueChanged.connect(self.wars.set_major_value)
        self.view.minorValue.valueChanged.connect(self.wars.set_minor_value)
        self.view.influenceToken.toggled.connect(self.wars.set_influence_token)
        self.view.addObjectiveBtn.clicked.connect(
            lambda: self.add_item(ItemType.OBJECTIVE)
        )
        self.view.addWarParticipantBtn.clicked.connect(
            lambda: self.add_item(ItemType.WAR_PARTICIPANT)
        )
        self.view.endWarBtn.clicked.connect(self.wars.close_war)
        self.view.addSectorBtn.clicked.connect(lambda: self.add_item(ItemType.SECTOR))
        self.view.addCampaignParticipantBtn.clicked.connect(
            lambda: self.add_item(ItemType.CAMPAIGN_PARTICIPANT)
        )
        self.view.endCampaignBtn.clicked.connect(self.campaigns.close_campaign)
        self.view.endRoundBtn.clicked.connect(self.rounds.close_round)
        self.view.resolvePairingBtn.clicked.connect(self.rounds.resolve_pairing)
        self.view.on_add_item = self.add_item
        self.view.on_edit_item = self.edit_item
        self.view.on_delete_item = self.delete_item

    def on_app_close(self) -> bool:
        if self.is_dirty:
            reply = QMessageBox.question(
                self.view,
                "Unsaved changes",
                "You have unsaved changes. Do you want to save before quitting?",
                QMessageBox.StandardButton.Yes
                | QMessageBox.StandardButton.No
                | QMessageBox.StandardButton.Cancel,
            )
            if reply == QMessageBox.StandardButton.Yes:
                self.save()
            elif reply == QMessageBox.StandardButton.Cancel:
                return False
        return True

    # Menu bar methods

    def new(self) -> None:
        if self.is_dirty:
            reply = QMessageBox.question(
                self.view,
                "Unsaved changes",
                "Discard current campaign?",
                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
            )
            if reply != QMessageBox.StandardButton.Yes:
                return
        self.model.new()
        self.current_file = None
        self.is_dirty = False
        self.navigation.refresh_players_view()
        self.navigation.refresh_wars_view()
        self.update_window_title()

    def open_file(self) -> None:
        if self.is_dirty:
            reply = QMessageBox.question(
                self.view,
                "Unsaved changes",
                "Discard current campaign?",
                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
            )
            if reply != QMessageBox.StandardButton.Yes:
                return
        path = self.view.ask_open_file()
        if not path:
            return
        try:
            self.model.load(path)
        except RuntimeError as e:
            QMessageBox.warning(
                self.view,
                "Add forbidden",
                str(e),
            )
            return
        self.current_file = path
        self.is_dirty = False
        self.navigation.refresh_players_view()
        self.navigation.refresh_wars_view()
        self.update_window_title()

    def save(self) -> None:
        if not self.current_file:
            self.save_as()
            return
        self.model.save(self.current_file)
        self.is_dirty = False
        self.update_window_title()

    def save_as(self) -> None:
        path = self.view.ask_save_file()
        if not path:
            return
        self.current_file = path
        self.model.save(path)
        self.is_dirty = False
        self.update_window_title()

    def show_about(self) -> None:
        QMessageBox.about(
            self.view,
            "About WarChron",
            f"""
            <h2>WarChron</h2>
            <p><b>Version:</b> {self.app_version}</p>
            <p>Campaign & War management tool</p>
            <p>© 2026 Your Name</p>
            <p>Licensed under GNU GPL v3</p>
            <hr>
            <p>Icons from Fugue Icons 3.5.6<br>
            © Yusuke Kamiyamane<br>
            Licensed under Creative Commons Attribution 3.0</p>
            """,
        )

    # Display methods

    def update_window_title(self) -> None:
        base = "WarChron"
        if self.current_file:
            base += f" - {self.current_file.name}"
        else:
            base += " - New file"
        if self.is_dirty:
            base = base + " *"
        self.view.setWindowTitle(base)

    # Command methods

    def add_item(self, item_type: str) -> None:
        try:
            if item_type == ItemType.PLAYER:
                play = self.players.create_player()
                if not play:
                    return
                self.navigation.refresh(RefreshScope.PLAYERS_LIST)
            elif item_type == ItemType.WAR:
                war = self.wars.create_war()
                if not war:
                    return
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.WAR, item_id=war.id
                )
            elif item_type == ItemType.CAMPAIGN:
                camp = self.campaigns.create_campaign()
                if not camp:
                    return
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.CAMPAIGN, item_id=camp.id
                )
            elif item_type == ItemType.OBJECTIVE:
                obj = self.wars.create_objective()
                if not obj:
                    return
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.WAR_PARTICIPANT:
                war_part = self.wars.create_war_participant()
                if not war_part:
                    return
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.SECTOR:
                sect = self.campaigns.create_sector()
                if not sect:
                    return
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.CAMPAIGN_PARTICIPANT:
                camp_part = self.campaigns.create_campaign_participant()
                if not camp_part:
                    return
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.ROUND:
                rnd = self.rounds.create_round()
                if not rnd:
                    return
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.ROUND, item_id=rnd.id
                )
        except DomainError as e:
            QMessageBox.warning(
                self.view,
                "Add forbidden",
                str(e),
            )
            return
        except RequiresConfirmation as e:
            reply = QMessageBox.question(
                self.view,
                "Confirm update",
                str(e),
                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
            )
            if reply == QMessageBox.StandardButton.Yes:
                e.action()
            else:
                return
        self.is_dirty = True
        self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)

    def edit_item(self, item_type: str, item_id: str) -> None:
        try:
            if item_type == ItemType.PLAYER:
                self.players.edit_player(item_id)
                self.navigation.refresh(RefreshScope.PLAYERS_LIST)
            elif item_type == ItemType.WAR:
                self.wars.edit_war(item_id)
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.WAR, item_id=item_id
                )
            elif item_type == ItemType.CAMPAIGN:
                self.campaigns.edit_campaign(item_id)
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.CAMPAIGN, item_id=item_id
                )
            elif item_type == ItemType.OBJECTIVE:
                self.wars.edit_objective(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.WAR_PARTICIPANT:
                self.wars.edit_war_participant(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.SECTOR:
                self.campaigns.edit_sector(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.CAMPAIGN_PARTICIPANT:
                self.campaigns.edit_campaign_participant(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.CHOICE:
                self.rounds.edit_round_choice(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.BATTLE:
                self.rounds.edit_round_battle(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
        except DomainError as e:
            QMessageBox.warning(
                self.view,
                "Update forbidden",
                str(e),
            )
            return
        except RequiresConfirmation as e:
            reply = QMessageBox.question(
                self.view,
                "Confirm update",
                str(e),
                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
            )
            if reply == QMessageBox.StandardButton.Yes:
                try:
                    e.action()
                except DomainError as inner:
                    QMessageBox.warning(
                        self.view,
                        "Update forbidden",
                        str(inner),
                    )
                    return
            else:
                return
        self.is_dirty = True
        self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)

    def delete_item(self, item_type: str, item_id: str) -> None:
        reply = QMessageBox.question(
            self.view,
            "Confirm deletion",
            "Are you sure you want to delete this item?",
            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
        )
        if reply != QMessageBox.StandardButton.Yes:
            return
        try:
            if item_type == ItemType.PLAYER:
                self.model.remove_player(item_id)
                self.navigation.refresh(RefreshScope.PLAYERS_LIST)
            elif item_type == ItemType.WAR:
                self.model.remove_war(item_id)
                self.navigation.refresh(RefreshScope.WARS_TREE)
            elif item_type == ItemType.CAMPAIGN:
                war = self.model.get_war_by_campaign(item_id)
                war_id = war.id
                self.model.remove_campaign(item_id)
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.WAR, item_id=war_id
                )
            elif item_type == ItemType.OBJECTIVE:
                self.model.remove_objective(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.WAR_PARTICIPANT:
                self.model.remove_war_participant(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.SECTOR:
                self.model.remove_sector(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.CAMPAIGN_PARTICIPANT:
                self.model.remove_campaign_participant(item_id)
                self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
            elif item_type == ItemType.ROUND:
                camp = self.model.get_campaign_by_round(item_id)
                camp_id = camp.id
                self.model.remove_round(item_id)
                self.navigation.refresh_and_select(
                    RefreshScope.WARS_TREE, item_type=ItemType.CAMPAIGN, item_id=camp_id
                )
        except DomainError as e:
            QMessageBox.warning(
                self.view,
                "Deletion forbidden",
                str(e),
            )
            return
        except RequiresConfirmation as e:
            reply = QMessageBox.question(
                self.view,
                "Confirm deletion",
                str(e),
                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
            )
            if reply == QMessageBox.StandardButton.Yes:
                e.action()
            else:
                return
        self.is_dirty = True
        self.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)