/// This is the state change table. It's indexed first by current state and then by the next
/// character in the pty stream.

use definitions::Action;

pub static STATE_CHANGE: [[u8; 256]; 16] = vt_state_table! {
    State::Anywhere => {
        0x18        => (Action::Execute, State::Ground),
        0x1a        => (Action::Execute, State::Ground),
        0x1b        => State::Escape,
    },

    State::Ground => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x20...0x7f => Action::Print,
        0x80...0x8f => Action::Execute,
        0x91...0x9a => Action::Execute,
        0x9c        => Action::Execute,
        // Beginning of UTF-8 2 byte sequence
        0xc2...0xdf => (State::Utf8, Action::BeginUtf8),
        // Beginning of UTF-8 3 byte sequence
        0xe0...0xef => (State::Utf8, Action::BeginUtf8),
        // Beginning of UTF-8 4 byte sequence
        0xf0...0xf4 => (State::Utf8, Action::BeginUtf8),
    },

    State::Escape => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x7f        => Action::Ignore,
        0x20...0x2f => (Action::Collect, State::EscapeIntermediate),
        0x30...0x4f => (Action::EscDispatch, State::Ground),
        0x51...0x57 => (Action::EscDispatch, State::Ground),
        0x59        => (Action::EscDispatch, State::Ground),
        0x5a        => (Action::EscDispatch, State::Ground),
        0x5c        => (Action::EscDispatch, State::Ground),
        0x60...0x7e => (Action::EscDispatch, State::Ground),
        0x5b        => State::CsiEntry,
        0x5d        => State::OscString,
        0x50        => State::DcsEntry,
        0x58        => State::SosPmApcString,
        0x5e        => State::SosPmApcString,
        0x5f        => State::SosPmApcString,
    },

    State::EscapeIntermediate => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x20...0x2f => Action::Collect,
        0x7f        => Action::Ignore,
        0x30...0x7e => (Action::EscDispatch, State::Ground)
    },

    State::CsiEntry => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x7f        => Action::Ignore,
        0x20...0x2f => (Action::Collect, State::CsiIntermediate),
        0x3a        => State::CsiIgnore,
        0x30...0x39 => (Action::Param, State::CsiParam),
        0x3b        => (Action::Param, State::CsiParam),
        0x3c...0x3f => (Action::Collect, State::CsiParam),
        0x40...0x7e => (Action::CsiDispatch, State::Ground)
    },

    State::CsiIgnore => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x20...0x3f => Action::Ignore,
        0x7f        => Action::Ignore,
        0x40...0x7e => State::Ground,
    },

    State::CsiParam => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x30...0x39 => Action::Param,
        0x3b        => Action::Param,
        0x7f        => Action::Ignore,
        0x3a        => State::CsiIgnore,
        0x3c...0x3f => State::CsiIgnore,
        0x20...0x2f => (Action::Collect, State::CsiIntermediate),
        0x40...0x7e => (Action::CsiDispatch, State::Ground)
    },

    State::CsiIntermediate => {
        0x00...0x17 => Action::Execute,
        0x19        => Action::Execute,
        0x1c...0x1f => Action::Execute,
        0x20...0x2f => Action::Collect,
        0x7f        => Action::Ignore,
        0x30...0x3f => State::CsiIgnore,
        0x40...0x7e => (Action::CsiDispatch, State::Ground),
    },

    State::DcsEntry => {
        0x00...0x17 => Action::Ignore,
        0x19        => Action::Ignore,
        0x1c...0x1f => Action::Ignore,
        0x7f        => Action::Ignore,
        0x3a        => State::DcsIgnore,
        0x20...0x2f => (Action::Collect, State::DcsIntermediate),
        0x30...0x39 => (Action::Param, State::DcsParam),
        0x3b        => (Action::Param, State::DcsParam),
        0x3c...0x3f => (Action::Collect, State::DcsParam),
        0x40...0x7e => State::DcsPassthrough
    },

    State::DcsIntermediate => {
        0x00...0x17 => Action::Ignore,
        0x19        => Action::Ignore,
        0x1c...0x1f => Action::Ignore,
        0x20...0x2f => Action::Collect,
        0x7f        => Action::Ignore,
        0x30...0x3f => State::DcsIgnore,
        0x40...0x7e => State::DcsPassthrough
    },

    State::DcsIgnore => {
        0x00...0x17 => Action::Ignore,
        0x19        => Action::Ignore,
        0x1c...0x1f => Action::Ignore,
        0x20...0x7f => Action::Ignore,
        0x9c        => State::Ground
    },

    State::DcsParam => {
        0x00...0x17 => Action::Ignore,
        0x19        => Action::Ignore,
        0x1c...0x1f => Action::Ignore,
        0x30...0x39 => Action::Param,
        0x3b        => Action::Param,
        0x7f        => Action::Ignore,
        0x3a        => State::DcsIgnore,
        0x3c...0x3f => State::DcsIgnore,
        0x20...0x2f => (Action::Collect, State::DcsIntermediate),
        0x40...0x7e => State::DcsPassthrough
    },

    State::DcsPassthrough => {
        0x00...0x17 => Action::Put,
        0x19        => Action::Put,
        0x1c...0x1f => Action::Put,
        0x20...0x7e => Action::Put,
        0x7f        => Action::Ignore,
        0x9c        => State::Ground,
    },

    State::SosPmApcString => {
        0x00...0x17 => Action::Ignore,
        0x19        => Action::Ignore,
        0x1c...0x1f => Action::Ignore,
        0x20...0x7f => Action::Ignore,
        0x9c       => State::Ground
    },

    State::OscString => {
        0x00...0x06 => Action::Ignore,
        0x07        => State::Ground,
        0x08...0x17 => Action::Ignore,
        0x19        => Action::Ignore,
        0x1c...0x1f => Action::Ignore,
        0x20...0xff => Action::OscPut,
    }
};

pub static ENTRY_ACTIONS: &'static [Action] = &[
   Action::None,     // State::Anywhere
   Action::Clear,    // State::CsiEntry
   Action::None,     // State::CsiIgnore
   Action::None,     // State::CsiIntermediate
   Action::None,     // State::CsiParam
   Action::Clear,    // State::DcsEntry
   Action::None,     // State::DcsIgnore
   Action::None,     // State::DcsIntermediate
   Action::None,     // State::DcsParam
   Action::Hook,     // State::DcsPassthrough
   Action::Clear,    // State::Escape
   Action::None,     // State::EscapeIntermediate
   Action::None,     // State::Ground
   Action::OscStart, // State::OscString
   Action::None,     // State::SosPmApcString
   Action::None,     // State::Utf8
];

pub static EXIT_ACTIONS: &'static [Action] = &[
   Action::None,   // State::Anywhere
   Action::None,   // State::CsiEntry
   Action::None,   // State::CsiIgnore
   Action::None,   // State::CsiIntermediate
   Action::None,   // State::CsiParam
   Action::None,   // State::DcsEntry
   Action::None,   // State::DcsIgnore
   Action::None,   // State::DcsIntermediate
   Action::None,   // State::DcsParam
   Action::Unhook, // State::DcsPassthrough
   Action::None,   // State::Escape
   Action::None,   // State::EscapeIntermediate
   Action::None,   // State::Ground
   Action::OscEnd, // State::OscString
   Action::None,   // State::SosPmApcString
   Action::None,   // State::Utf8
];