mod cli;
mod episodes;
mod files;
mod history;
mod list;
mod metadata;
mod presets;
mod settings;
mod sfv;
mod subtitles;

use aurora_curator_core::format::ExpressionFormat;
use aurora_curator_core::matching::{self, EpisodeGuess, MovieGuess, ReleaseInfo};
use aurora_curator_core::rename::{self, ConflictPolicy, RenameAction, RenamePlanItem, RenameResult};
use aurora_curator_core::string_bindings;
use std::collections::HashMap;
use tauri::AppHandle;

/// Renders a naming-scheme expression against a set of binding values.
/// This is the Tauri-facing entry point into the core format engine, used by the
/// rename-preview panel in the UI so users see live results as they edit a pattern.
#[tauri::command]
fn render_expression(expression: String, bindings: HashMap<String, String>) -> Result<String, String> {
    let compiled = ExpressionFormat::compile(&expression).map_err(|e| e.to_string())?;
    compiled
        .format(&string_bindings(bindings))
        .map_err(|e| e.to_string())
}

/// Guesses a season/episode number pair (and series name) from a filename using local
/// regex patterns only - no network calls, no metadata lookup. Returns `None` when the
/// filename doesn't carry a recognizable season/episode marker (movies, already-clean
/// names, etc).
#[tauri::command]
fn guess_episode(filename: String) -> Option<EpisodeGuess> {
    matching::guess_episode(&filename)
}

/// Guesses a movie title (and release year, if present) from a filename using local
/// regex/heuristic patterns only - no network calls. Callers should try
/// `guess_episode` first and only fall back to this when it returns `None`; see
/// `matching::guess_movie` for why.
#[tauri::command]
fn guess_movie(filename: String) -> Option<MovieGuess> {
    matching::guess_movie(&filename)
}

/// Guesses release-tag metadata (resolution, source, video/audio codec, release
/// group) from a filename's own text using local regex patterns only - no network
/// calls, no real media probing (Aurora Curator never ships an ffprobe/MediaInfo dependency,
/// so filename tags are the only source for these fields). Independent of
/// `guess_episode`/`guess_movie`: called alongside whichever of those two applies,
/// since a release name carries (or doesn't carry) these tags regardless of whether
/// it's an episode or a movie.
#[tauri::command]
fn guess_release_info(filename: String) -> Option<ReleaseInfo> {
    matching::guess_release_info(&filename)
}

/// Executes a batch of planned on-disk rename/copy/symlink operations (optionally
/// moving/copying files into subfolders - see `aurora_curator_core::rename`). `action` picks
/// which of the three happens; `conflict` picks what happens when a computed target
/// already exists (skip it, save alongside it with an auto-numbered name, or replace
/// it) - the UI is expected to have already shown the user the full old-path/new-path
/// plan and both choices, and gotten explicit confirmation before calling this. Runs
/// off the main thread since real filesystem I/O shouldn't block the UI.
///
/// Every successfully-produced item is recorded to the rename history log afterward
/// (see `history::record_batch`), tagged with `action`, so it can be undone later from
/// the History panel - a Move undo moves the file back, a Copy/Symlink undo just
/// removes what was created. `conflict` is NOT recorded - undoing always uses its own
/// fixed skip-on-conflict policy regardless of what the original rename used.
#[tauri::command]
async fn execute_rename(
    app: AppHandle,
    items: Vec<RenamePlanItem>,
    action: RenameAction,
    conflict: ConflictPolicy,
) -> Vec<RenameResult> {
    let results = tauri::async_runtime::spawn_blocking(move || rename::execute_renames(&items, action, conflict))
        .await
        .unwrap_or_default();
    history::record_batch(&app, &results, action);
    results
}

/// Entry point for the `-rename` command-line mode - see `cli.rs`'s module doc. Never
/// builds a Tauri `App`/`Builder` at all, unlike [`run`] below. Returns the process
/// exit code for `main.rs` to pass to `std::process::exit`.
pub fn run_cli(args: Vec<String>) -> i32 {
    cli::run(args)
}

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    tauri::Builder::default()
        .plugin(tauri_plugin_dialog::init())
        .invoke_handler(tauri::generate_handler![
            render_expression,
            guess_episode,
            guess_movie,
            guess_release_info,
            execute_rename,
            metadata::fetch_metadata,
            metadata::fetch_movie_metadata,
            settings::get_tmdb_token,
            settings::save_tmdb_token,
            settings::get_omdb_api_key,
            settings::save_omdb_api_key,
            settings::get_tv_metadata_source,
            settings::save_tv_metadata_source,
            settings::get_movie_metadata_source,
            settings::save_movie_metadata_source,
            settings::get_opensubtitles_api_key,
            settings::save_opensubtitles_api_key,
            settings::get_opensubtitles_username,
            settings::has_opensubtitles_password,
            settings::save_opensubtitles_login,
            subtitles::search_subtitles,
            subtitles::download_subtitle,
            episodes::browse_episodes,
            sfv::compute_checksums,
            sfv::save_checksum_file,
            sfv::verify_checksum_file,
            list::export_text_list,
            history::list_rename_history,
            history::undo_rename_batch,
            presets::list_presets,
            presets::save_preset,
            presets::delete_preset,
            files::pick_files,
            files::pick_folder,
            files::expand_dropped_paths,
        ])
        .run(tauri::generate_context!())
        .expect("error while running Aurora Curator");
}