use anyhow::Result;

mod common;

use common::cache::*;
use common::common_args::*;
use common::fixture::*;
use common::input_arg::*;
use common::output_option::*;
use common::process::*;
use common::program::*;
use common::target::*;
use common::test_dir::*;

//------------------------------------------

const USAGE: &str = "Usage: cache_restore [options]\n\
                     Options:\n  \
                       {-h|--help}\n  \
                       {-i|--input} <input xml file>\n  \
                       {-o|--output} <output device or file>\n  \
                       {-q|--quiet}\n  \
                       {--metadata-version} <1 or 2>\n  \
                       {-V|--version}\n\
                     \n  \
                       {--debug-override-metadata-version} <integer>\n  \
                       {--omit-clean-shutdown}";

//------------------------------------------

struct CacheRestore;

impl<'a> Program<'a> for CacheRestore {
    fn name() -> &'a str {
        "thin_restore"
    }

    fn path() -> &'a std::ffi::OsStr {
        CACHE_RESTORE.as_ref()
    }

    fn usage() -> &'a str {
        USAGE
    }

    fn arg_type() -> ArgType {
        ArgType::IoOptions
    }

    fn bad_option_hint(option: &str) -> String {
        msg::bad_option_hint(option)
    }
}

impl<'a> InputProgram<'a> for CacheRestore {
    fn mk_valid_input(td: &mut TestDir) -> Result<std::path::PathBuf> {
        mk_valid_xml(td)
    }

    fn file_not_found() -> &'a str {
        msg::FILE_NOT_FOUND
    }

    fn missing_input_arg() -> &'a str {
        msg::MISSING_INPUT_ARG
    }

    fn corrupted_input() -> &'a str {
        "" // we don't intent to verify error messages of XML parsing
    }
}

impl<'a> OutputProgram<'a> for CacheRestore {
    fn missing_output_arg() -> &'a str {
        msg::MISSING_OUTPUT_ARG
    }
}

impl<'a> MetadataWriter<'a> for CacheRestore {
    fn file_not_found() -> &'a str {
        msg::FILE_NOT_FOUND
    }
}

//-----------------------------------------

test_accepts_help!(CacheRestore);
test_accepts_version!(CacheRestore);

test_missing_input_option!(CacheRestore);
test_input_file_not_found!(CacheRestore);
test_corrupted_input_data!(CacheRestore);

test_missing_output_option!(CacheRestore);
test_tiny_output_file!(CacheRestore);

test_unwritable_output_file!(CacheRestore);

//-----------------------------------------

// TODO: share with thin_restore, era_restore

fn quiet_flag(flag: &str) -> Result<()> {
    let mut td = TestDir::new()?;
    let xml = mk_valid_xml(&mut td)?;
    let md = mk_zeroed_md(&mut td)?;

    let output = run_ok_raw(CACHE_RESTORE, args!["-i", &xml, "-o", &md, flag])?;

    assert_eq!(output.stdout.len(), 0);
    assert_eq!(output.stderr.len(), 0);
    Ok(())
}

#[test]
fn accepts_q() -> Result<()> {
    quiet_flag("-q")
}

#[test]
fn accepts_quiet() -> Result<()> {
    quiet_flag("--quiet")
}

//-----------------------------------------

#[test]
fn successfully_restores() -> Result<()> {
    let mut td = TestDir::new()?;
    let xml = mk_valid_xml(&mut td)?;
    let md = mk_zeroed_md(&mut td)?;
    run_ok(CACHE_RESTORE, args!["-i", &xml, "-o", &md])?;
    Ok(())
}

#[test]
fn override_metadata_version() -> Result<()> {
    let mut td = TestDir::new()?;
    let xml = mk_valid_xml(&mut td)?;
    let md = mk_zeroed_md(&mut td)?;
    run_ok(
        CACHE_RESTORE,
        args![
            "-i",
            &xml,
            "-o",
            &md,
            "--debug-override-metadata-version",
            "10298"
        ],
    )?;
    Ok(())
}

#[test]
fn accepts_omit_clean_shutdown() -> Result<()> {
    let mut td = TestDir::new()?;
    let xml = mk_valid_xml(&mut td)?;
    let md = mk_zeroed_md(&mut td)?;
    run_ok(
        CACHE_RESTORE,
        args!["-i", &xml, "-o", &md, "--omit-clean-shutdown"],
    )?;
    Ok(())
}

//-----------------------------------------