#![deny(rust_2018_idioms, unsafe_code)]
#![warn(
    absolute_paths_not_starting_with_crate,
    ambiguous_associated_items,
    anonymous_parameters,
    arithmetic_overflow,
    array_into_iter,
    asm_sub_register,
    bad_asm_style,
    bindings_with_variant_name,
    break_with_label_and_loop,
    clashing_extern_declarations,
    coherence_leak_check,
    conflicting_repr_hints,
    confusable_idents,
    const_evaluatable_unchecked,
    const_item_mutation,
    dangling_pointers_from_temporaries,
    dead_code,
    deprecated_in_future,
    deprecated_where_clause_location,
    deprecated,
    deref_into_dyn_supertrait,
    deref_nullptr,
    drop_bounds,
    duplicate_macro_attributes,
    dyn_drop,
    ellipsis_inclusive_range_patterns,
    enum_intrinsics_non_enums,
    explicit_outlives_requirements,
    exported_private_dependencies,
    forbidden_lint_groups,
    function_item_references,
    future_incompatible,
    ill_formed_attribute_input,
    improper_ctypes_definitions,
    improper_ctypes,
    incomplete_features,
    incomplete_include,
    ineffective_unstable_trait_impl,
    inline_no_sanitize,
    invalid_atomic_ordering,
    invalid_doc_attributes,
    invalid_type_param_default,
    invalid_value,
    irrefutable_let_patterns,
    keyword_idents,
    large_assignments,
    late_bound_lifetime_arguments,
    legacy_derive_helpers,
    macro_expanded_macro_exports_accessed_by_absolute_paths,
    meta_variable_misuse,
    missing_abi,
    missing_copy_implementations,
    missing_debug_implementations,
    missing_docs,
    mixed_script_confusables,
    mutable_transmutes,
    named_arguments_used_positionally,
    named_asm_labels,
    no_mangle_const_items,
    no_mangle_generic_items,
    non_ascii_idents,
    non_camel_case_types,
    non_fmt_panics,
    non_shorthand_field_patterns,
    non_snake_case,
    non_upper_case_globals,
    nonstandard_style,
    noop_method_call,
    overflowing_literals,
    overlapping_range_endpoints,
    path_statements,
    patterns_in_fns_without_body,
    proc_macro_derive_resolution_fallback,
    pub_use_of_private_extern_crate,
    redundant_semicolons,
    repr_transparent_external_private_fields,
    rust_2021_incompatible_closure_captures,
    rust_2021_incompatible_or_patterns,
    rust_2021_prefixes_incompatible_syntax,
    rust_2021_prelude_collisions,
    semicolon_in_expressions_from_macros,
    soft_unstable,
    stable_features,
    text_direction_codepoint_in_comment,
    text_direction_codepoint_in_literal,
    trivial_bounds,
    trivial_casts,
    trivial_numeric_casts,
    type_alias_bounds,
    tyvar_behind_raw_pointer,
    uncommon_codepoints,
    unconditional_panic,
    unconditional_recursion,
    unexpected_cfgs,
    uninhabited_static,
    unknown_crate_types,
    unnameable_test_items,
    unreachable_code,
    unreachable_patterns,
    unreachable_pub,
    unsafe_op_in_unsafe_fn,
    unstable_features,
    unstable_name_collisions,
    unused_allocation,
    unused_assignments,
    unused_attributes,
    unused_braces,
    unused_comparisons,
    unused_crate_dependencies,
    unused_doc_comments,
    unused_extern_crates,
    unused_features,
    unused_import_braces,
    unused_imports,
    unused_labels,
    unused_lifetimes,
    unused_macro_rules,
    unused_macros,
    unused_must_use,
    unused_mut,
    unused_parens,
    unused_qualifications,
    unused_unsafe,
    unused_variables,
    useless_deprecated,
    while_true
)]
#![warn(
    clippy::all,
    clippy::await_holding_lock,
    clippy::char_lit_as_u8,
    clippy::checked_conversions,
    clippy::cognitive_complexity,
    clippy::dbg_macro,
    clippy::debug_assert_with_mut_call,
    clippy::disallowed_script_idents,
    clippy::doc_link_with_quotes,
    clippy::doc_markdown,
    clippy::empty_enum,
    clippy::empty_line_after_outer_attr,
    clippy::empty_structs_with_brackets,
    clippy::enum_glob_use,
    clippy::equatable_if_let,
    clippy::exit,
    clippy::expl_impl_clone_on_copy,
    clippy::explicit_deref_methods,
    clippy::explicit_into_iter_loop,
    clippy::fallible_impl_from,
    clippy::filter_map_next,
    clippy::flat_map_option,
    clippy::float_cmp_const,
    clippy::float_cmp,
    clippy::float_equality_without_abs,
    clippy::fn_params_excessive_bools,
    clippy::fn_to_numeric_cast_any,
    clippy::from_iter_instead_of_collect,
    clippy::if_let_mutex,
    clippy::implicit_clone,
    clippy::imprecise_flops,
    clippy::index_refutable_slice,
    clippy::inefficient_to_string,
    clippy::invalid_upcast_comparisons,
    clippy::iter_not_returning_iterator,
    clippy::large_digit_groups,
    clippy::large_stack_arrays,
    clippy::large_types_passed_by_value,
    clippy::let_unit_value,
    clippy::linkedlist,
    clippy::lossy_float_literal,
    clippy::macro_use_imports,
    clippy::manual_ok_or,
    clippy::map_err_ignore,
    clippy::map_flatten,
    clippy::map_unwrap_or,
    clippy::match_same_arms,
    clippy::match_wild_err_arm,
    clippy::match_wildcard_for_single_variants,
    clippy::mem_forget,
    clippy::missing_const_for_fn,
    clippy::missing_enforced_import_renames,
    clippy::missing_errors_doc,
    clippy::missing_panics_doc,
    clippy::mut_mut,
    clippy::mutex_integer,
    clippy::needless_borrow,
    clippy::needless_continue,
    clippy::needless_for_each,
    clippy::needless_pass_by_value,
    clippy::negative_feature_names,
    clippy::nonstandard_macro_braces,
    clippy::nursery,
    clippy::option_if_let_else,
    clippy::option_option,
    clippy::path_buf_push_overwrite,
    clippy::pedantic,
    // clippy::print_stderr,
    clippy::print_stdout,
    clippy::ptr_as_ptr,
    clippy::rc_mutex,
    clippy::ref_option_ref,
    clippy::rest_pat_in_fully_bound_structs,
    clippy::same_functions_in_if_condition,
    clippy::semicolon_if_nothing_returned,
    clippy::shadow_unrelated,
    clippy::similar_names,
    clippy::single_match_else,
    clippy::string_add_assign,
    clippy::string_add,
    clippy::string_lit_as_bytes,
    clippy::suspicious_operation_groupings,
    clippy::todo,
    clippy::trailing_empty_array,
    clippy::trait_duplication_in_bounds,
    clippy::trivially_copy_pass_by_ref,
    clippy::unimplemented,
    clippy::unnecessary_wraps,
    clippy::unnested_or_patterns,
    clippy::unseparated_literal_suffix,
    clippy::unused_self,
    // clippy::use_debug,
    clippy::use_self,
    clippy::used_underscore_binding,
    clippy::useless_let_if_seq,
    clippy::useless_transmute,
    clippy::verbose_file_reads,
    clippy::wildcard_dependencies,
    clippy::wildcard_imports,
    clippy::zero_sized_map_values
)]

//! A simple Tera + Markdown renderer for Obsidian vaults.

pub mod templates;

mod base;
mod canvas;
mod html;
mod note;
mod page;

use std::fmt::Write as _;

use sable_core::{MetaInfo, config::Config};
use sable_vault::{File, SharedVault};

use crate::templates::{Templates, TemplatesError};

#[derive(Debug, miette::Diagnostic, thiserror::Error)]
pub enum RendererError {
    #[error("failed to create parent directories")]
    CreateDir(#[source] std::io::Error),
    #[error("failed to render template")]
    RenderTemplate(#[source] TemplatesError),
    #[error("failed to write rendered template")]
    WriteTemplate(#[source] std::io::Error),
}

#[derive(Debug)]
pub struct Renderer {
    config: Config,
    meta_info: &'static MetaInfo,
    vault: SharedVault,

    templates: Templates,
}

impl Renderer {
    pub const fn new(
        config: Config,
        meta_info: &'static MetaInfo,
        vault: SharedVault,
        templates: Templates,
    ) -> Self {
        Self {
            config,
            meta_info,
            vault,

            templates,
        }
    }

    pub fn render_all(&self) {
        self.render_bases();
        self.render_canvases();
        self.render_notes();
        self.render_pages();
        self.render_htmls();
    }

    /// Copy non-'note' assets to the destination folder.
    pub fn copy_assets(&self) {
        let vault = self.vault.read();

        for file in vault.files.values() {
            if !file.kind.is_asset() {
                continue;
            }

            if let Err(err) = self.copy_asset(file).into_diagnostic() {
                tracing::error!(path=%file.path.full, "failed to copy asset");
                eprintln!("{err:?}");
            }
        }
    }

    fn copy_asset(&self, file: &File) -> std::io::Result<()> {
        let mut path = self.config.build.join(&file.path.slug);

        if let Some(dir) = path.parent() {
            std::fs::create_dir_all(dir)?;
        }

        if let Some(ext) = file.path.extension() {
            path.add_extension(ext);
        }

        std::fs::copy(&file.path.full, &path)?;

        Ok(())
    }
}

#[derive(Debug)]
pub(crate) struct DiagnosticError(pub(crate) Box<dyn std::error::Error + Send + Sync + 'static>);

impl std::fmt::Display for DiagnosticError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        let msg = &self.0;
        write!(indenter::indented(f).with_str("  "), "{msg}")
    }
}

impl std::error::Error for DiagnosticError {
    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
        self.0.source()
    }
}

impl miette::Diagnostic for DiagnosticError {}

pub(crate) trait IntoDiagnostic<T, E> {
    fn into_diagnostic(self) -> Result<T, miette::Report>;
}

impl<T, E: std::error::Error + Send + Sync + 'static> IntoDiagnostic<T, E> for Result<T, E> {
    fn into_diagnostic(self) -> Result<T, miette::Report> {
        self.map_err(|e| DiagnosticError(Box::new(e)).into())
    }
}

pub(crate) fn slugify_path(mut path: &str) -> String {
    use itertools::Itertools as _;

    fn get_extension(path: &str) -> Option<&str> {
        if !path.contains('.') {
            return None;
        }

        if !path.contains('/') {
            return path.split('.').rfind(|s| !s.is_empty() || *s != ".");
        }

        path.split('/')
            .rfind(|s| !s.is_empty() || *s != "/")
            .and_then(|s| s.split('.').rfind(|s| !s.is_empty() || *s != "."))
    }

    let ext = get_extension(path);

    if let Some(ext) = &ext {
        path = path.trim_end_matches(ext);
        path = path.trim_end_matches('.');
    }

    let (path, has_leading_period) = if path.starts_with('.') {
        (path.trim_start_matches('.'), true)
    } else {
        (path, false)
    };

    let path = path
        .split('/')
        .filter(|s| !(s.is_empty() || *s == "/"))
        .map(slug::slugify)
        .join("/");

    format!(
        "{}{}{}{}",
        if has_leading_period { "./" } else { "" },
        url_escape::encode_path(path.as_str()),
        if ext.is_some() { "." } else { "" },
        ext.map_or("", |ext| match ext {
            "md" => "html",
            ext => ext,
        }),
    )
}