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# Copyright 2026 Shota FUJI
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
#
# SPDX-License-Identifier: MPL-2.0

{
  stdenvNoCC,
  lib,
  zig_0_16,
  installShellFiles,
}:
let
  zig = zig_0_16;
in
stdenvNoCC.mkDerivation (finalAttrs: {
  pname = "timetracker";
  version = "0.1.0";

  src =
    with lib.fileset;
    toSource {
      root = ./.;
      fileset = unions [
        ./src
        ./build.zig
        ./build.zig.zon
      ];
    };

  nativeBuildInputs = [
    zig
    installShellFiles
  ];

  zigBuildFlags = if stdenvNoCC.hostPlatform.isLinux then [ "-Ddir-env=XDG_DATA_DIRS" ] else [ ];

  zigDeps = zig.fetchDeps {
    inherit (finalAttrs) pname version;

    src =
      with lib.fileset;
      toSource {
        root = ./.;
        fileset = unions [
          ./build.zig
          ./build.zig.zon
        ];
      };

    fetchAll = true;
    hash = "sha256-p5AXWVd7ksJHHKUF7syLEcxaAOu/PWwuG7FAvM2orXA=";
  };

  postConfigure = ''
    ln -s ${finalAttrs.zigDeps} "$ZIG_GLOBAL_CACHE_DIR/p"
  '';

  postInstall = ''
    installShellCompletion --fish --cmd ${finalAttrs.pname} <(cat << "EOF"
    set -l commands list status start stop delete
    complete -c ${finalAttrs.pname} --no-files

    complete -c ${finalAttrs.pname} \
      -s h -l help \
      -d "Show help text"

    complete -c ${finalAttrs.pname} \
      -n "not __fish_seen_subcommand_from $commands" \
      -a "status" \
      -d "Show a running timer or a last stopped timer"

    complete -c ${finalAttrs.pname} \
      -n "not __fish_seen_subcommand_from $commands" \
      -a "list" \
      -d "List timers"

    complete -c ${finalAttrs.pname} \
      -n "not __fish_seen_subcommand_from $commands" \
      -a "start" \
      -d "Start a new timer"

    complete -c ${finalAttrs.pname} \
      -n "not __fish_seen_subcommand_from $commands" \
      -a "stop" \
      -d "Stop a running timer"

    complete -c ${finalAttrs.pname} \
      -n "not __fish_seen_subcommand_from $commands" \
      -a "delete" \
      -d "Delete a timer from history"

    complete -c ${finalAttrs.pname} \
      -n "__fish_seen_subcommand_from stop" \
      -a "(${finalAttrs.pname} list running -c id,title)"

    complete -c ${finalAttrs.pname} \
      -n "__fish_seen_subcommand_from delete" \
      -a "(${finalAttrs.pname} list -c id,title)"

    complete -c ${finalAttrs.pname} \
      -n "__fish_seen_subcommand_from list status" \
      -s f -l format --no-files --require-parameter \
      -d "Output format" \
      -a "tsv jsonl"

    complete -c ${finalAttrs.pname} \
      -n "__fish_seen_subcommand_from list status" \
      -s c -l columns --no-files --require-parameter \
      -d "Output columns" \
      -a "(__fish_append , id title status started stopped)"

    complete -c ${finalAttrs.pname} \
      -n "__fish_seen_subcommand_from list status" \
      -s d -l datetime --no-files --require-parameter \
      -d "Output datetime format" \
      -a "system unix"

    EOF)
  '';
})