/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.

Author: Leonardo de Moura
*/
#include <vector>
#include "kernel/kernel_exception.h"

namespace lean {
format kernel_exception::pp(formatter const &, options const &) const {
    return format(what());
}

format unknown_name_exception::pp(formatter const &, options const &) const {
    return format{format(what()), format(" '"), format(get_name()), format("'")};
}

format already_declared_exception::pp(formatter const &, options const &) const {
    return format{format("invalid object declaration, environment already has an object named '"), format(get_name()), format("'")};
}

format has_no_type_exception::pp(formatter const &, options const &) const {
    return format{format("object '"), format(const_name(m_const)), format("' has no type associated with it")};
}

format app_type_mismatch_exception::pp(formatter const & fmt, options const & opts) const {
    unsigned indent     = get_pp_indent(opts);
    context const & ctx = get_context();
    expr const & app    = get_application();
    format app_fmt      = fmt(ctx, app, false, opts);
    std::vector<expr> const & arg_types = get_arg_types();
    auto it = arg_types.begin();
    format f_type_fmt   = fmt(ctx, *it, false, opts);
    format arg_types_fmt;
    ++it;
    for (unsigned i = 1; it != arg_types.end(); ++it, ++i) {
        expr const & a    = arg(app, i);
        format arg_fmt    = fmt(ctx, a, false, opts);
        if (is_pi(a) || is_lambda(a) || is_let(a))
            arg_fmt = paren(arg_fmt);
        format arg_type_fmt = fmt(ctx, *it, false, opts);
        arg_types_fmt += nest(indent, compose(line(), group(format{arg_fmt, space(), colon(), nest(indent, format{line(), arg_type_fmt})})));
    }
    format r;
    r += format{format("type mismatch in argument #"), format(m_arg_pos),  format(" at application")};
    r += nest(indent, compose(line(), app_fmt));
    r += compose(line(), format("Function type:"));
    r += nest(indent, compose(line(), f_type_fmt));
    r += line();
    if (arg_types.size() > 2)
        r += format("Arguments types:");
    else
        r += format("Argument type:");
    r += arg_types_fmt;
    return r;
}

format function_expected_exception::pp(formatter const & fmt, options const & opts) const {
    unsigned indent = get_pp_indent(opts);
    format expr_fmt = fmt(get_context(), get_expr(), false, opts);
    format r;
    r += format("function expected at");
    r += nest(indent, compose(line(), expr_fmt));
    return r;
}

format type_expected_exception::pp(formatter const & fmt, options const & opts) const {
    unsigned indent = get_pp_indent(opts);
    format expr_fmt = fmt(get_context(), get_expr(), false, opts);
    format r;
    r += format("type expected, got");
    r += nest(indent, compose(line(), expr_fmt));
    return r;
}

format def_type_mismatch_exception::pp(formatter const & fmt, options const & opts) const {
    unsigned indent     = get_pp_indent(opts);
    context const & ctx = get_context();
    format r;
    r += format("type mismatch at definition '");
    r += format(get_name());
    r += format("', expected type");
    r += nest(indent, compose(line(), fmt(ctx, get_type(), false, opts)));
    r += compose(line(), format("Given type:"));
    r += nest(indent, compose(line(), fmt(ctx, get_value_type(), false, opts)));
    return r;
}
}