use cargo::ops;
use cargo::util::{CliResult, Config};
use cargo::util::important_paths::{find_root_manifest_for_wd};

#[derive(RustcDecodable)]
struct Options {
    flag_target: Option<String>,
    flag_features: Vec<String>,
    flag_jobs: Option<u32>,
    flag_manifest_path: Option<String>,
    flag_no_default_features: bool,
    flag_no_deps: bool,
    flag_open: bool,
    flag_verbose: bool,
    flag_release: bool,
    flag_quiet: bool,
    flag_color: Option<String>,
    flag_package: Vec<String>,
}

pub const USAGE: &'static str = "
Build a package's documentation

Usage:
    cargo doc [options]

Options:
    -h, --help                   Print this message
    --open                       Opens the docs in a browser after the operation
    -p SPEC, --package SPEC ...  Package to document
    --no-deps                    Don't build documentation for dependencies
    -j N, --jobs N               The number of jobs to run in parallel
    --release                    Build artifacts in release mode, with optimizations
    --features FEATURES          Space-separated list of features to also build
    --no-default-features        Do not build the `default` feature
    --target TRIPLE              Build for the target triple
    --manifest-path PATH         Path to the manifest to document
    -v, --verbose                Use verbose output
    -q, --quiet                  No output printed to stdout
    --color WHEN                 Coloring: auto, always, never

By default the documentation for the local package and all dependencies is
built. The output is all placed in `target/doc` in rustdoc's usual format.

If the --package argument is given, then SPEC is a package id specification
which indicates which package should be documented. If it is not given, then the
current package is documented. For more information on SPEC and its format, see
the `cargo help pkgid` command.
";

pub fn execute(options: Options, config: &Config) -> CliResult<Option<()>> {
    try!(config.shell().set_verbosity(options.flag_verbose, options.flag_quiet));
    try!(config.shell().set_color_config(options.flag_color.as_ref().map(|s| &s[..])));

    let root = try!(find_root_manifest_for_wd(options.flag_manifest_path, config.cwd()));

    let doc_opts = ops::DocOptions {
        open_result: options.flag_open,
        compile_opts: ops::CompileOptions {
            config: config,
            jobs: options.flag_jobs,
            target: options.flag_target.as_ref().map(|t| &t[..]),
            features: &options.flag_features,
            no_default_features: options.flag_no_default_features,
            spec: &options.flag_package,
            exec_engine: None,
            filter: ops::CompileFilter::Everything,
            release: options.flag_release,
            mode: ops::CompileMode::Doc {
                deps: !options.flag_no_deps,
            },
            target_rustc_args: None,
            target_rustdoc_args: None,
        },
    };

    try!(ops::doc(&root, &doc_opts));
    Ok(None)
}
