/* TA-LIB Copyright (c) 1999-2025, Mario Fortier
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * - Neither name of author nor the names of its contributors
 *   may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* Important:
 *  This file is automatically generated by the utility ta_codegen.
 *  Any modifications will be lost on next execution of ta_codegen.
 *
 *  Modifications should instead be done with the "C" source file
 *  in ta-lib\src\ta_func
 */

/* List of contributors:
 *
 *  Initial  Name/description
 *  -------------------------------------------------------------------
 *  RM       Robert Meier
 *  MF       Mario Fortier
 *
 * Change history:
 *
 *  MMDDYY BY     Description
 *  -------------------------------------------------------------------
 *  120307 RM     Initial Version
 *  120907 MF     Handling of a few limit cases
 */

// Import types from parent module
use super::*;

// Allow non-snake-case names to maintain TA-Lib API compatibility
#[allow(non_snake_case)]
#[allow(unused_variables)]
#[allow(dead_code)]
#[allow(unused_mut)]
#[allow(unused_assignments)]
impl Core {
    /// Lookback period for [`Core::accbands`]: the number of leading input values consumed before
    /// the first output value can be produced.
    ///
    /// # Arguments
    ///
    /// * `optInTimePeriod` — SMA smoothing period for all three bands (default 20, range
    ///   2..=100000)
    ///
    /// Returns `usize::MAX` when a parameter is out of range. Integer parameters accept `i32::MIN`
    /// to select their default value.
    #[inline]
    pub fn accbands_lookback(&self, mut optInTimePeriod: i32) -> usize {
        if ((optInTimePeriod) as i32) == (i32::MIN) {
            optInTimePeriod = 20;
        } else if (((optInTimePeriod) as i32) < 2) || (((optInTimePeriod) as i32) > 100000) {
            return usize::MAX;
        }
        return self.sma_lookback(optInTimePeriod);
    }
    /// Acceleration Bands: three overlap lines around price. The middle band is an SMA of the
    /// close; the upper/lower bands are SMAs of the high/low scaled by an intraday-range factor.
    ///
    /// # Formula
    ///
    /// ```text
    /// factor = 4*(H-L)/(H+L)
    /// upperRaw = H*(1+factor), lowerRaw = L*(1-factor)
    /// Upper = SMA(upperRaw, N), Middle = SMA(Close, N), Lower = SMA(lowerRaw, N)
    /// ```
    ///
    /// # Arguments
    ///
    /// * `startIdx` — Start index of the requested calculation range.
    /// * `endIdx` — End index of the requested calculation range (inclusive).
    /// * `inHigh` — High prices per bar.
    /// * `inLow` — Low prices per bar.
    /// * `inClose` — Close prices per bar.
    /// * `optInTimePeriod` — SMA smoothing period for all three bands (default 20, range
    ///   2..=100000)
    /// * `outBegIdx` — Set to the input index of the first output value.
    /// * `outNBElement` — Set to the number of output values written.
    /// * `outRealUpperBand` — SMA of the range-scaled high band.
    /// * `outRealMiddleBand` — SMA of the close.
    /// * `outRealLowerBand` — SMA of the range-scaled low band.
    ///
    /// Integer parameters accept `i32::MIN` to select their default value.
    ///
    /// # Errors
    ///
    /// Returns [`RetCode::OutOfRangeStartIndex`] when `endIdx < startIdx`, and
    /// [`RetCode::BadParam`] when an optional parameter is outside its documented range.
    ///
    /// # Panics
    ///
    /// Input slices must cover `startIdx..=endIdx` and output slices must hold the number of values
    /// produced for that range: undersized slices panic or, for functions that forward to unchecked
    /// internals, cause undefined behavior. Sizing every output slice to the input length is always
    /// sufficient.
    ///
    /// # Examples
    ///
    /// ```
    /// use ta_lib::{Core, RetCode};
    ///
    /// let high: Vec<f64> = (0..252).map(|i| 101.0 + 10.0 * (0.1 * i as f64).sin()).collect();
    /// let low: Vec<f64> = (0..252).map(|i| 99.0 + 10.0 * (0.1 * i as f64).sin()).collect();
    /// let close: Vec<f64> = (0..252).map(|i| 100.0 + 10.0 * (0.1 * i as f64).sin()).collect();
    ///
    /// let core = Core::new();
    /// let mut out_beg = 0;
    /// let mut out_nb = 0;
    /// let mut upper_band = vec![0.0; 252];
    /// let mut middle_band = vec![0.0; 252];
    /// let mut lower_band = vec![0.0; 252];
    ///
    /// let ret = core.accbands(
    ///     0, high.len() - 1, &high, &low, &close, 20,
    ///     &mut out_beg, &mut out_nb, &mut upper_band, &mut middle_band, &mut lower_band,
    /// );
    /// assert_eq!(ret, RetCode::Success);
    /// assert!(out_nb > 0);
    /// ```
    ///
    /// # See also
    ///
    /// [`Core::sma`] · [`Core::bbands`]
    ///
    /// Further reading: [ta-lib.org/functions/accbands](https://ta-lib.org/functions/accbands/)
    #[doc(alias = "AccelerationBands")]
    pub fn accbands(
        &self,
        startIdx: usize,
        endIdx: usize,
        inHigh: &[f64],
        inLow: &[f64],
        inClose: &[f64],
        mut optInTimePeriod: i32,
        outBegIdx: &mut usize,
        outNBElement: &mut usize,
        outRealUpperBand: &mut [f64],
        outRealMiddleBand: &mut [f64],
        outRealLowerBand: &mut [f64],
    ) -> RetCode {
        if endIdx < startIdx {
            return RetCode::OutOfRangeStartIndex;
        }
        if ((optInTimePeriod) as i32) == (i32::MIN) {
            optInTimePeriod = 20;
        } else if (((optInTimePeriod) as i32) < 2) || (((optInTimePeriod) as i32) > 100000) {
            return RetCode::BadParam;
        }
        let mut startIdx = startIdx;
        let mut retCode: RetCode = RetCode::Success;
        let mut tempBuffer1: Vec<f64> = Vec::new();
        let mut tempBuffer2: Vec<f64> = Vec::new();
        let mut outBegIdxDummy: usize = 0_usize;
        let mut outNbElementDummy: usize = 0_usize;
        let mut i: usize = 0_usize;
        let mut j: usize = 0_usize;
        let mut outputSize: usize = 0_usize;
        let mut bufferSize: usize = 0_usize;
        let mut lookbackTotal: usize = 0_usize;
        let mut tempReal: f64 = 0.0_f64;
        // Identify the minimum number of price bar needed
        // to calculate at least one output.
        lookbackTotal = self.sma_lookback(optInTimePeriod);
        // Move up the start index if there is not
        // enough initial data.
        if startIdx < lookbackTotal {
            startIdx = lookbackTotal;
        }
        // Make sure there is still something to evaluate.
        if startIdx > endIdx {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return RetCode::Success;
        }
        // Buffer will contains also the lookback required for SMA
        // to satisfy the caller requested startIdx/endIdx.
        outputSize = endIdx - startIdx + 1;
        bufferSize = outputSize + lookbackTotal;
        tempBuffer1 = vec![0.0_f64; (bufferSize * 1) as usize];
        tempBuffer2 = vec![0.0_f64; (bufferSize * 1) as usize];
        // Calculate the upper/lower band at the same time (no SMA yet).
        // Must start calculation back enough to cover the lookback
        // required later for the SMA.
        // for( j = 0, i = startIdx - lookbackTotal; i <= endIdx; i += 1, j += 1 )
        j = 0;
        i = startIdx - lookbackTotal;
        while i <= endIdx {
            tempReal = inHigh[i] + inLow[i];
            if !((tempReal).abs() < 1e-14) {
                tempReal = 4_f64 * (inHigh[i] - inLow[i]) / tempReal;
                tempBuffer1[j] = inHigh[i] * (1_f64 + tempReal);
                tempBuffer2[j] = inLow[i] * (1_f64 - tempReal);
            } else {
                tempBuffer1[j] = inHigh[i];
                tempBuffer2[j] = inLow[i];
            }
            i += 1;
            j += 1;
        }
        // Calculate the middle band, which is a moving average of the close.
        retCode = self.sma_unguarded(startIdx, endIdx, inClose, optInTimePeriod, &mut outBegIdxDummy, &mut outNbElementDummy, outRealMiddleBand);
        if retCode != RetCode::Success || ((outNbElementDummy as usize)) as usize != outputSize {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return retCode;
        }
        // Now let's take the SMA for the upper band.
        retCode = self.sma_unguarded(0, bufferSize - 1, &tempBuffer1, optInTimePeriod, &mut outBegIdxDummy, &mut outNbElementDummy, outRealUpperBand);
        if retCode != RetCode::Success || ((outNbElementDummy as usize)) as usize != outputSize {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return retCode;
        }
        // Now let's take the SMA for the lower band.
        retCode = self.sma_unguarded(0, bufferSize - 1, &tempBuffer2, optInTimePeriod, &mut outBegIdxDummy, &mut outNbElementDummy, outRealLowerBand);
        if retCode != RetCode::Success || ((outNbElementDummy as usize)) as usize != outputSize {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return retCode;
        }
        (*outBegIdx) = startIdx;
        (*outNBElement) = outputSize;
        return RetCode::Success;
    }
    /// Unchecked variant of [`Core::accbands`], used for internal cross-indicator calls.
    ///
    /// Skips parameter validation and uses unchecked indexing internally. Every argument must
    /// satisfy the constraints documented on [`Core::accbands`]; an out-of-range parameter, an
    /// input slice not covering `startIdx..=endIdx`, or an undersized output slice may panic or
    /// cause undefined behavior. Prefer [`Core::accbands`].
    #[inline]
    pub fn accbands_unguarded(
        &self,
        mut startIdx: usize,
        endIdx: usize,
        inHigh: &[f64],
        inLow: &[f64],
        inClose: &[f64],
        mut optInTimePeriod: i32,
        outBegIdx: &mut usize,
        outNBElement: &mut usize,
        outRealUpperBand: &mut [f64],
        outRealMiddleBand: &mut [f64],
        outRealLowerBand: &mut [f64],
    ) -> RetCode {
        let mut retCode: RetCode = RetCode::Success;
        let mut tempBuffer1: Vec<f64> = Vec::new();
        let mut tempBuffer2: Vec<f64> = Vec::new();
        let mut outBegIdxDummy: usize = 0_usize;
        let mut outNbElementDummy: usize = 0_usize;
        let mut i: usize = 0_usize;
        let mut j: usize = 0_usize;
        let mut outputSize: usize = 0_usize;
        let mut bufferSize: usize = 0_usize;
        let mut lookbackTotal: usize = 0_usize;
        let mut tempReal: f64 = 0.0_f64;
        unsafe {
        assert!(endIdx < inHigh.len());
        assert!(endIdx < inLow.len());
        assert!(endIdx < inClose.len());
        let _assertLb = self.accbands_lookback(optInTimePeriod);
        let _assertStart = if startIdx > _assertLb { startIdx } else { _assertLb };
        assert!(_assertStart > endIdx || endIdx - _assertStart < outRealUpperBand.len());
        assert!(_assertStart > endIdx || endIdx - _assertStart < outRealMiddleBand.len());
        assert!(_assertStart > endIdx || endIdx - _assertStart < outRealLowerBand.len());
        lookbackTotal = self.sma_lookback(optInTimePeriod);
        if startIdx < lookbackTotal {
            startIdx = lookbackTotal;
        }
        if startIdx > endIdx {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return RetCode::Success;
        }
        outputSize = endIdx - startIdx + 1;
        bufferSize = outputSize + lookbackTotal;
        tempBuffer1 = vec![0.0_f64; (bufferSize * 1) as usize];
        tempBuffer2 = vec![0.0_f64; (bufferSize * 1) as usize];
        // for( j = 0, i = startIdx - lookbackTotal; i <= endIdx; i += 1, j += 1 )
        j = 0;
        i = startIdx - lookbackTotal;
        while i <= endIdx {
            tempReal = *inHigh.as_ptr().add(i) + *inLow.as_ptr().add(i);
            if !((tempReal).abs() < 1e-14) {
                tempReal = 4_f64 * (*inHigh.as_ptr().add(i) - *inLow.as_ptr().add(i)) / tempReal;
                *tempBuffer1.as_mut_ptr().add(j) = *inHigh.as_ptr().add(i) * (1_f64 + tempReal);
                *tempBuffer2.as_mut_ptr().add(j) = *inLow.as_ptr().add(i) * (1_f64 - tempReal);
            } else {
                *tempBuffer1.as_mut_ptr().add(j) = *inHigh.as_ptr().add(i);
                *tempBuffer2.as_mut_ptr().add(j) = *inLow.as_ptr().add(i);
            }
            i += 1;
            j += 1;
        }
        retCode = self.sma_unguarded(startIdx, endIdx, inClose, optInTimePeriod, &mut outBegIdxDummy, &mut outNbElementDummy, outRealMiddleBand);
        if retCode != RetCode::Success || ((outNbElementDummy as usize)) as usize != outputSize {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return retCode;
        }
        retCode = self.sma_unguarded(0, bufferSize - 1, &tempBuffer1, optInTimePeriod, &mut outBegIdxDummy, &mut outNbElementDummy, outRealUpperBand);
        if retCode != RetCode::Success || ((outNbElementDummy as usize)) as usize != outputSize {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return retCode;
        }
        retCode = self.sma_unguarded(0, bufferSize - 1, &tempBuffer2, optInTimePeriod, &mut outBegIdxDummy, &mut outNbElementDummy, outRealLowerBand);
        if retCode != RetCode::Success || ((outNbElementDummy as usize)) as usize != outputSize {
            (*outBegIdx) = 0;
            (*outNBElement) = 0;
            return retCode;
        }
        (*outBegIdx) = startIdx;
        (*outNBElement) = outputSize;
        return RetCode::Success;
        } // unsafe
    }
}
/***************/
/* End of File */
/***************/
