use crate::schema::json_schema_for;
use anyhow::{Context as _, Result, anyhow};
use assistant_tool::{ActionLog, Tool, ToolResult};
use gpui::AnyWindowHandle;
use gpui::{App, Entity, Task};
use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
use project::Project;
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use std::sync::Arc;
use ui::IconName;
use util::markdown::MarkdownInlineCode;

#[derive(Debug, Serialize, Deserialize, JsonSchema)]
pub struct CreateDirectoryToolInput {
    /// The path of the new directory.
    ///
    /// <example>
    /// If the project has the following structure:
    ///
    /// - directory1/
    /// - directory2/
    ///
    /// You can create a new directory by providing a path of "directory1/new_directory"
    /// </example>
    pub path: String,
}

pub struct CreateDirectoryTool;

impl Tool for CreateDirectoryTool {
    fn name(&self) -> String {
        "create_directory".into()
    }

    fn description(&self) -> String {
        include_str!("./create_directory_tool/description.md").into()
    }

    fn needs_confirmation(&self, _: &serde_json::Value, _: &App) -> bool {
        false
    }

    fn may_perform_edits(&self) -> bool {
        false
    }

    fn icon(&self) -> IconName {
        IconName::Folder
    }

    fn input_schema(&self, format: LanguageModelToolSchemaFormat) -> Result<serde_json::Value> {
        json_schema_for::<CreateDirectoryToolInput>(format)
    }

    fn ui_text(&self, input: &serde_json::Value) -> String {
        match serde_json::from_value::<CreateDirectoryToolInput>(input.clone()) {
            Ok(input) => {
                format!("Create directory {}", MarkdownInlineCode(&input.path))
            }
            Err(_) => "Create directory".to_string(),
        }
    }

    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
        let input = match serde_json::from_value::<CreateDirectoryToolInput>(input) {
            Ok(input) => input,
            Err(err) => return Task::ready(Err(anyhow!(err))).into(),
        };
        let project_path = match project.read(cx).find_project_path(&input.path, cx) {
            Some(project_path) => project_path,
            None => {
                return Task::ready(Err(anyhow!("Path to create was outside the project"))).into();
            }
        };
        let destination_path: Arc<str> = input.path.as_str().into();

        cx.spawn(async move |cx| {
            project
                .update(cx, |project, cx| {
                    project.create_entry(project_path.clone(), true, cx)
                })?
                .await
                .with_context(|| format!("Creating directory {destination_path}"))?;

            Ok(format!("Created directory {destination_path}").into())
        })
        .into()
    }
}