use std::collections::HashSet;

use chrono::{DateTime, FixedOffset};
use settings::Setting as _;

use crate::report_if_error;
use crate::terminal::general_settings::GeneralSettings;
use crate::util::bindings::trigger_to_keystroke;

mod main_page;
pub mod utils;
pub use main_page::{ResourceCenterMainEvent, ResourceCenterMainView};
mod keybindings_page;
pub use keybindings_page::KeybindingsView;
mod section_views;
pub use section_views::{ChangelogSectionView, ContentSectionView, FeatureSectionView};
pub mod sections;
mod view;
use galaxyui::keymap::Keystroke;
use galaxyui::{AppContext, Entity, SingletonEntity};
use serde::{Deserialize, Serialize};
pub use view::{ResourceCenterAction, ResourceCenterEvent, ResourceCenterPage, ResourceCenterView};

use self::section_views::feature_section::FeatureSection;

#[derive(
    Clone,
    Copy,
    Debug,
    Hash,
    PartialEq,
    std::cmp::Eq,
    Serialize,
    Deserialize,
    schemars::JsonSchema,
    settings_value::SettingsValue,
)]
#[schemars(
    description = "A welcome tip shown to new users.",
    rename_all = "snake_case"
)]
pub enum Tip {
    #[schemars(description = "A non-interactive informational hint.")]
    Hint(TipHint),
    #[schemars(description = "An interactive tip that triggers an action when clicked.")]
    Action(TipAction),
}

// Tips that aren't clickable to dispatch an action
#[derive(
    Clone,
    Copy,
    Debug,
    Hash,
    PartialEq,
    std::cmp::Eq,
    Serialize,
    Deserialize,
    schemars::JsonSchema,
    settings_value::SettingsValue,
)]
#[schemars(description = "A non-interactive tip hint.", rename_all = "snake_case")]
pub enum TipHint {
    CreateBlock,
    BlockSelect,
    BlockAction,
}

// Tips that are clickable and dispatch an action
#[derive(
    Clone,
    Copy,
    Debug,
    Hash,
    PartialEq,
    std::cmp::Eq,
    Serialize,
    Deserialize,
    schemars::JsonSchema,
    settings_value::SettingsValue,
)]
#[schemars(description = "An interactive tip action.", rename_all = "snake_case")]
pub enum TipAction {
    CommandPalette,
    SplitPane,
    ThemePicker,
    HistorySearch,
    CommandSearch,
    AiCommandSearch,
    SaveNewLaunchConfig,
    WarpAI,
    // This toggles Warp Drive rather than opening it. This enum can't directly be
    // renamed because we serialize it into the welcome tips.
    OpenGalaxyDrive,
    Changelog,
    // Note that this item has been deprecated from the UI and is not in any section.
    // We are leaving it in this enum to ensure that we don't re-use `Workflows` as a
    // value. Since old clients will have this value in their user defaults, we want
    // to prevent future usage of this enum value.
    Workflows,
}

impl TipAction {
    pub fn editable_binding_name(&self) -> &'static str {
        match self {
            TipAction::CommandPalette => "workspace:toggle_command_palette",
            TipAction::SplitPane => "pane_group:add_right",
            TipAction::HistorySearch => "input:search_command_history",
            TipAction::CommandSearch => "workspace:show_command_search",
            TipAction::AiCommandSearch => "input:toggle_natural_language_command_search",
            TipAction::ThemePicker => "workspace:show_theme_chooser",
            TipAction::SaveNewLaunchConfig => "workspace:open_launch_config_save_modal",
            TipAction::WarpAI => "workspace:toggle_ai_assistant",
            TipAction::OpenGalaxyDrive => "workspace:toggle_left_panel",
            // Slash commands are also registered as editable bindings, so callers can look them up here
            // the same way they do regular app actions.
            TipAction::Changelog => "/changelog",
            TipAction::Workflows => "input:toggle_workflows",
        }
    }

    pub fn keyboard_shortcut(&self, ctx: &mut AppContext) -> Option<Keystroke> {
        ctx.editable_bindings()
            .find(|binding| binding.name == self.editable_binding_name())
            .and_then(|binding| trigger_to_keystroke(binding.trigger))
    }
}

#[derive(Clone, Debug, PartialEq, Eq)]

// Section item that dispatches an action within the app
pub struct FeatureItem {
    pub title: &'static str,
    pub description: &'static str,
    pub feature: Tip,
    pub editable_binding_name: Option<&'static str>,
    pub shortcut: Option<Keystroke>,
}

impl FeatureItem {
    pub fn new(
        title: &'static str,
        description: &'static str,
        feature: Tip,
        ctx: &mut AppContext,
    ) -> Self {
        let (editable_binding_name, shortcut) = match feature {
            Tip::Hint(_) => (None, None),
            Tip::Action(tip) => (
                Some(tip.editable_binding_name()),
                tip.keyboard_shortcut(ctx),
            ),
        };

        Self {
            title,
            description,
            feature,
            editable_binding_name,
            shortcut,
        }
    }
}

#[derive(Clone, Debug)]
// Section item that links to an external URL
pub struct ContentItem {
    pub title: &'static str,
    pub description: &'static str,
    pub url: &'static str,
    pub button_label: &'static str,
}

pub enum Section {
    Feature(FeatureSectionData),
    Content(ContentSectionData),
    Changelog(),
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct FeatureSectionData {
    pub section_name: FeatureSection,
    pub items: Vec<FeatureItem>,
}

#[derive(Clone)]
pub struct ContentSectionData {
    pub section_name: FeatureSection,
    pub items: Vec<ContentItem>,
}

#[derive(Clone)]
pub struct ChangelogSectionData {
    pub section_name: FeatureSection,
    pub date: DateTime<FixedOffset>,
    pub new_features_markdown: String,
    pub improvements_markdown: String,
    pub coming_soon_markdown: String,
}

#[derive(Default)]
pub struct TipsCompleted {
    pub features_used: HashSet<Tip>,
    pub skipped_or_completed: bool,
    pub gamified_tips_count: Option<usize>,
}

impl Entity for TipsCompleted {
    type Event = ();
}

impl FeatureSectionData {
    pub fn is_section_completed(&self, tips_completed: &TipsCompleted) -> bool {
        self.items
            .iter()
            .all(|item| tips_completed.features_used.contains(&item.feature))
    }

    pub fn tips_completed_count(&self, tips_completed: &TipsCompleted) -> usize {
        self.items
            .iter()
            .filter(|item| tips_completed.features_used.contains(&item.feature))
            .count()
    }
}

/// Marks the welcome tip as used, writes their current state to a cloud synced preference.
pub fn mark_feature_used_and_write_to_user_defaults(
    feature: Tip,
    tips_completed: &mut TipsCompleted,
    ctx: &mut AppContext,
) {
    if tips_completed.mark_feature_used(feature) {
        GeneralSettings::handle(ctx).update(ctx, |general_settings, ctx| {
            report_if_error!(general_settings
                .welcome_tips_features_used
                .set_value(tips_completed.features_used.clone(), ctx));

            if tips_completed.skipped_or_completed {
                report_if_error!(general_settings
                    .welcome_tips_skipped_or_completed
                    .set_value(true, ctx));
            }
        });
    }
}

/// Updates the model to reflect welcome tips are skipped, writes to user defaults, and sends telemetry.
pub fn skip_tips_and_write_to_user_defaults(
    tips_completed: &mut TipsCompleted,
    ctx: &mut AppContext,
) {
    tips_completed.skipped_or_completed = true;
    GeneralSettings::handle(ctx).update(ctx, |general_settings, ctx| {
        report_if_error!(general_settings
            .welcome_tips_skipped_or_completed
            .set_value(true, ctx));
    });
}

/// Updates the model to reflect welcome tips are skipped, writes to user defaults, and sends telemetry.
pub fn complete_tips_and_write_to_user_defaults(
    tips_completed: &mut TipsCompleted,
    ctx: &mut AppContext,
) {
    tips_completed.skipped_or_completed = true;
    GeneralSettings::handle(ctx).update(ctx, |general_settings, ctx| {
        report_if_error!(general_settings
            .welcome_tips_skipped_or_completed
            .set_value(true, ctx));
    });
}

impl TipsCompleted {
    pub fn new(features_used: HashSet<Tip>, skipped_or_completed: bool) -> Self {
        Self {
            features_used,
            skipped_or_completed,
            gamified_tips_count: None,
        }
    }

    /// Returns true if the feature previously wasn't used.
    pub fn mark_feature_used(&mut self, feature: Tip) -> bool {
        let is_new_value = self.features_used.insert(feature);

        // Check if all gamified tips are completed
        if let Some(total_tips) = self.gamified_tips_count {
            if is_new_value && self.features_used.len() == total_tips {
                self.skipped_or_completed = true;
            }
        }

        is_new_value
    }

    pub fn serialized_tips(&self) -> Result<String, serde_json::Error> {
        serde_json::to_string(&self.features_used)
    }

    pub fn completed_count(&self) -> usize {
        self.features_used.len()
    }

    pub fn set_gamified_tips_count(&mut self, total: usize) {
        self.gamified_tips_count = Some(total)
    }
}