@lazyglobal off.

global able is lex(
    "launch", launch@,
    "burn", burn@,
    "orbit", do_orbit@,
    "circularize", circularize@,
    "yeet", yeet@,
    "power_down", power_down@,
    "power_up", power_up@
).

local function engine {
    local early is ship:partsdubbed("ROE-AJ10Early").
    local mid is ship:partsdubbed("ROE-AJ10Mid").
    for eng in early {
        return eng.
    }
    for eng in mid {
        return eng.
    }
}

local function ignite {
    rcs on.
    lock throttle to 1.0.
    wait 3.
    stage.
}

local function is_ablestar {
    return not ship:partsdubbed("ROE-AJ10Mid"):empty.
}

local function yeet {
    parameter hdg, tgt_alt.

    power_down().
    set warpmode to "physics".
    set warp to 3.
    if is_ablestar() {
        wait until eta:apoapsis < 180.
    } else {
        wait until eta:apoapsis < 100.
    }
    set warp to 0.
    wait until kuniverse:timewarp:issettled.
    power_up().

    rcs on.
    local target is heading(hdg, ship:obt:trueanomaly - 180, -hdg).
    lock steering to target.
    if is_ablestar() {
        wait until eta:apoapsis < 150.
    } else {
        wait until eta:apoapsis < 80.
    }

    lock throttle to 1.0.
    wait 3.
    stage.
    wait until ship:obt:apoapsis > tgt_alt.
    rcs off.
    lock throttle to 0.0.
    unlock steering.
    wait 0.
}

local function do_orbit {
    parameter hdg, burnout is false.

//    power_down().
    set warpmode to "physics".
    set warp to 3.
    wait until eta:apoapsis < 100.
    set warp to 0.
    wait until kuniverse:timewarp:issettled.
//    power_up().

    rcs on.
    local target is heading(hdg, ship:obt:trueanomaly - 180, -hdg).
    lock steering to target.
    wait until eta:apoapsis < 80.

    lock throttle to 1.0.
    wait 3.
    stage.
    if burnout {
        wait until engine():flameout.
    } else {
        wait until ship:velocity:orbit:mag > circular_vel().
    }
    // Fine-tune orbital speed w/ RCS fore/aft?
    rcs off.
    lock throttle to 0.0.
    unlock steering.
    wait 0.
}

local function circularize {
    parameter target_ecc, max_vel_delta is 0.1.

    power_down().
    set warpmode to "physics".
    set warp to 3.
    wait until eta:apoapsis < 100.
    set warp to 0.
    wait until kuniverse:timewarp:issettled.
    power_up().

    rcs on.
    lock steering to ship:prograde.
    wait until eta:apoapsis < 80.

    local second_burn is engine:ignition.
    engine():shutdown().
    lock throttle to 1.0.
    wait 3.
    engine():activate().
    wait until ship:velocity:orbit:mag > circular_vel().
    lock throttle to 0.0.
    lock steering to lookdirup(ship:prograde:forevector, ship:up:forevector).
    until false {
        local threshold is 0.1.
        local p is threshold / max_vel_delta.
        local dv is circular_vel() - ship:velocity:orbit:mag.
        local vert_vel is ship:verticalspeed * ship:up:forevector.
        local vert_vel_d is 0.0 - vert_vel:mag.
        local horz_vel_d is circular_vel() - (ship:velocity:orbit - vert_vel):mag.
        local horz_factor is horz_vel_d * p.
        local vert_factor is vert_vel_d * p.
        if ship:obt:eccentricity < target_ecc or (abs(horz_factor) < threshold and abs(vert_factor) < threshold) {
            set ship:control:fore to 0.
            set ship:control:top to 0.
            break.
        }
        set ship:control:fore to horz_factor.
        set ship:control:top to vert_factor.
        wait 0.
    }
    unlock steering.
    rcs off.
    wait 0.
}

local function burn {
    lock steering to heading(hdg, 0, -hdg).
    parameter hdg.
    ignite().
    wait 1.

    rcs off.
    set warpmode to "physics".
    set warp to 3.

    wait until ship:thrust = 0.
    unlock steering.
    unlock throttle.
    set warp to 0.
    wait until kuniverse:timewarp:issettled.
}

local function launch {
    parameter hdg, target_alt.

    local pitch_pid is pidloop(0.001, 0, 0, -90, 90, 1).
    set pitch_pid:setpoint to target_alt.
    local wanted_hdg is ship:facing.
    lock steering to wanted_hdg.

    ignite().

    wait 1.
    set warpmode to "physics".
    set warp to 3.

    until ship:thrust = 0 or ship:obt:periapsis > target_alt or eta:periapsis < eta:apoapsis {
        local wanted_pitch is pitch_pid:update(time:seconds, ship:obt:apoapsis).
        local neutral_pitch is ship:obt:trueanomaly / 2 - 90.
        set wanted_hdg to heading(hdg, wanted_pitch, -hdg).
        wait 0.
    }

    if ship:thrust <> 0 {
        lock steering to ship:prograde.
        wait until ship:thrust = 0.
    }

    unlock steering.
    unlock throttle.
    rcs off.
    set warp to 0.
    wait until kuniverse:timewarp:issettled.
}


local function power_down {
    local avionics is ship:partsdubbed("able-avionics")[0].
    local avi_mod is avionics:getmodule("ModuleProceduralAvionics").
    avi_mod:doaction("shutdown avionics", true).
}

local function power_up {
    local avionics is ship:partsdubbed("able-avionics")[0].
    local avi_mod is avionics:getmodule("ModuleProceduralAvionics").
    avi_mod:doaction("activate avionics", true).

}